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@@ -1,3 +1,12 @@ +- tzdata split + update +- getty + serial rework +- add daemon() function to functions.sh +- add printing of OK/FAIL (optional verbose bootup) +- fixup rework libgcc --export-symbols +- libgcc static? +- remove 32 bit kernel for 64 bit targets +- static toolchain support +- toolchain in /usr , check gcj - rework startup, maybe use init.c, start gettys after bootup ready - more output for initscripts on bootup - port uuterm diff --git a/docs/Makefile b/docs/Makefile new file mode 100644 index 000000000..1670e0041 --- /dev/null +++ b/docs/Makefile @@ -0,0 +1,24 @@ +TOPDIR=$(pwd) + +all: pdf text html + +pdf: + mkdir .pdf pdf + cp *.txt .pdf + cp images/*.png pdf + a2x -v --dblatex-opts "-P latex.output.revhistory=0" -f pdf -d book -L -D pdf .pdf/manual.txt + +text: + mkdir .text text + cp *.txt .text + cp images/*.png text + a2x -v -f text -d book -L -D text .text/manual.txt + +html: + mkdir .html html + cp *.txt .html + cp images/*.png html + a2x -v --xsltproc-opts "--stringparam toc.section.depth 2" -f xhtml -d book -L -D html .html/manual.txt + +clean: + rm -rf pdf .pdf text .text html .html diff --git a/docs/adding-packages-auto.txt b/docs/adding-packages-auto.txt new file mode 100644 index 000000000..ac52c395f --- /dev/null +++ b/docs/adding-packages-auto.txt @@ -0,0 +1,71 @@ +// -*- mode:doc; -*- +// vim: set syntax=asciidoc: + +Infrastructure for autotools-based packages +~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ + +[[auto-package-tutorial]] + +First, let's see how to write a +Makefile+ file for an autotools-based +package, with an example: + +------------------------ +01: # This file is part of the OpenADK project. OpenADK is copyrighted +02: # material, please see the LICENCE file in the top-level directory. +03: +04: include ${TOPDIR}/rules.mk +05: +06: PKG_NAME:= libfoo +07: PKG_VERSION:= 1.0 +08: PKG_RELEASE:= 1 +09: PKG_MD5SUM:= ba526cd8f4403a5d351a9efaa8608fbc +10: PKG_DESCR:= foo library +11: PKG_SECTION:= libs +12: PKG_BUILDDEP:= openssl +13: PKG_DEPENDS:= libopenssl +14: PKG_URL:= http://www.libfoo.org/ +15: PKG_SITES:= http://downloads.libfoo.org/ +16: +17: include ${TOPDIR}/mk/package.mk +18: +19: $(eval $(call PKG_template,LIBFOO,libfoo,${PKG_VERSION}-${PKG_RELEASE},${PKG_DEPENDS},${PKG_DESCR},${PKG_SECTION})) +20: +21: libfoo-install: +22: ${INSTALL_DIR} ${IDIR_LIBFOO}/usr/lib +23: ${CP} ${WRKINST}/usr/lib/libfoo.so* ${IDIR_LIBFOO}/usr/lib +24: +25: include ${TOPDIR}/mk/pkg-bottom.mk + +------------------------ + +The Makefile begins with line 4 with the inclusion of the top level rules.mk +file. After that the Makefile starts on line 6 to 15 with metadata +information: the name of the package (+PKG_NAME+), the version of the package +(+PKG_VERSION+), the release number of the package (+PKG_RELEASE+), which is +used in OpenADK to mark any package updates, the md5 hash of the source archive +(+PKG_MD5SUM+), the short one line description for the package (+PKG_DESCR+), +the package section for the menu configuration system (+PKG_SECTION+), the +package buildtime dependencies (+PKG_BUILDDEP+), the package runtime +dependencies (+PKG_DEPENDS+), the package homepage (+PKG_URL+) and finally the +internet locations at which the tarball can be downloaded from (+PKG_SITES+). +Normally ${PKG_NAME}-${PKG_VERSION}.tar.gz will be downloaded. You can +overwrite the default via the +DISTFILES+ variable. You can add more then one +archive name in +DISTFILES+ via space separated. If you have no source archive +at all, just use the boolean variable +NO_DISTFILES+ and set it to 1. + +On line 17 the +mk/package.mk+ file is included, which contains the PKG_template +function, which is used in line 19. + +On line 21-23 we install the shared library into the package installation +directory, which is used to create the resulting binary package or tar archive +for the target. + +On line 25 we include +mk/pkg-bottom.mk+, which includes common functions used +by the package fetching and building process. + +With the autotools infrastructure, all the steps required to build +and install the packages are already defined, and they generally work +well for most autotools-based packages. However, when required, it is +still possible to customize what is done in any particular step. +By adding a post-operation hook (after extract, patch, configure, +build or install). See xref:hooks[] for details. diff --git a/docs/adding-packages-conclusion.txt b/docs/adding-packages-conclusion.txt new file mode 100644 index 000000000..6ec88e999 --- /dev/null +++ b/docs/adding-packages-conclusion.txt @@ -0,0 +1,13 @@ +// -*- mode:doc; -*- +// vim: set syntax=asciidoc: + +Conclusion +~~~~~~~~~~ + +As you can see, adding a software package to OpenADK is simply a +matter of writing a Makefile using an existing template and modifying it +according to the compilation process required by the package. + +If you package software that might be useful for other people, don't +forget to send a patch to the OpenADK developer (see xref:submitting-patches[])! + diff --git a/docs/adding-packages-directory.txt b/docs/adding-packages-directory.txt new file mode 100644 index 000000000..347c39aa6 --- /dev/null +++ b/docs/adding-packages-directory.txt @@ -0,0 +1,57 @@ +// -*- mode:doc; -*- +// vim: set syntax=asciidoc: + +New package +~~~~~~~~~~~ + +First of all, create a directory and Makefile under the +package+ +directory for your software, for example +libfoo+: + +------------ + $ make newpackage PKG=libfoo VER=0.1 +------------ + +This will create a sample Makefile for you, with a lot of comments and +hints. It describes how the package should be downloaded, configured, +built, installed, etc. + +Depending on the package type, the +Makefile+ must be written in a +different way, using two different infrastructures: + +* manual package configuration + +* automatic package configuration using autotools + + +[[dependencies-target-toolchain-options]] +Dependencies on target and toolchain options + +Some packages depend on certain options of the toolchain: mainly the +choice of C library and C++ support. Some packages can only be built on +certain target architectures or for specific target systems. + +These dependencies have to be expressed in the Makefile. The given values +are space separated and can be negated with ! as a prefix. + +* Target architecture +** variable used PKG_ARCH_DEPENDS +** allowed values are: arm, mips, .. see target/arch.lst + +* Target system +** variable used PKG_SYSTEM_DEPENDS +** for allowed values see the output of ./scripts/getsystems + +* Target C library +** variable used PKG_LIBC_DEPENDS +** allowed values are: uclibc glibc musl + +* Host system +** variable used PKG_HOST_DEPENDS +** allowed values are: linux darwin cygwin freebsd netbsd openbsd + +* C++ support +** variable used PKG_NEED_CXX +** Comment string: `C++` + +Further formatting details: see xref:writing-rules-mk[the writing +rules]. diff --git a/docs/adding-packages-hooks.txt b/docs/adding-packages-hooks.txt new file mode 100644 index 000000000..65786fbfc --- /dev/null +++ b/docs/adding-packages-hooks.txt @@ -0,0 +1,31 @@ +// -*- mode:doc; -*- +// vim: set syntax=asciidoc: + +[[hooks]] +Hooks available in the various build steps +~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ + +The infrastructure allow packages to specify hooks. These define further +actions to perform after existing steps. Most hooks aren't really useful for +manual packages, since the +Makefile+ already has full control over the +actions performed in each step of the package construction. + +The following hook targets are available: + +* +post-extract+ +* +post-patch+ +* +pre-configure+ +* +post-configure+ +* +pre-build+ +* +post-build+ +* +pre-install+ +* +post-install+ + +For example, to make some scripts executable after extraction, +add following to your +Makefile+: + +--------------------- +post-extract: + chmod a+x $(WRKBUILD)/build/make/*.sh + chmod a+x $(WRKBUILD)/build/make/*.pl +--------------------- diff --git a/docs/adding-packages-host.txt b/docs/adding-packages-host.txt new file mode 100644 index 000000000..a858d4563 --- /dev/null +++ b/docs/adding-packages-host.txt @@ -0,0 +1,92 @@ +// -*- mode:doc; -*- +// vim: set syntax=asciidoc: + +Infrastructure for host packages +~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ + +[[host-package-tutorial]] + +First, let's see how to write a +Makefile+ for an host only package, required +by another target package to build, with an example: + +------------------------ +01: # This file is part of the OpenADK project. OpenADK is copyrighted +02: # material, please see the LICENCE file in the top-level directory. +03: +04: include $(TOPDIR)/rules.mk +05: +06: PKG_NAME:= hostfoo +07: PKG_VERSION:= 1.0 +08: PKG_RELEASE:= 1 +09: PKG_MD5SUM:= 291ba57c0acd218da0b0916c280dcbae +10: PKG_DESCR:= hostfoo utility +11: PKG_SECTION:= misc +12: PKG_URL:= http://www.foo.org/ +13: PKG_SITES:= http://download.foo.org/ +14: +15: PKG_CFLINE_HOSTFOO:= depends on ADK_HOST_ONLY +16: +17: include $(TOPDIR)/mk/host.mk +18: include $(TOPDIR)/mk/package.mk +19: +20: $(eval $(call HOST_template,HOSTFOO,hostfoo,$(PKG_VERSION)-${PKG_RELEASE})) +21: +22: HOST_STYLE:= auto +23: +24: include ${TOPDIR}/mk/host-bottom.mk +25: include ${TOPDIR}/mk/pkg-bottom.mk +------------------------ + +The differences to a target package is the inclusion of +mk/host.mk+ in line 17 and ++mk/host-bottom.mk+ in line 24. Furthermore the HOST_template is called instead of +the PKG_template. The last difference is the usage of +PKG_CFLINE_HOSTFOO+ to mark +the package as host only package. + +Following mix between host and target package is possible, too: +------------------------ +01: # This file is part of the OpenADK project. OpenADK is copyrighted +02: # material, please see the LICENCE file in the top-level directory. +03: +04: include ${TOPDIR}/rules.mk +05: +06: PKG_NAME:= foo +07: PKG_VERSION:= 1.0 +08: PKG_RELEASE:= 1 +09: PKG_MD5SUM:= 032a7b7b9f1a6e278ccde73f82cec5c2 +10: PKG_DESCR:= foo tool +11: PKG_SECTION:= lang +12: PKG_BUILDDEP:= foo-host +13: PKG_URL:= http://www.foo.org/ +14: PKG_SITES:= http://download.foo.org/ +15: +16: include ${TOPDIR}/mk/host.mk +17: include ${TOPDIR}/mk/package.mk +18: +19: $(eval $(call HOST_template,FOO,foo,${PKG_VERSION}-${PKG_RELEASE})) +20: $(eval $(call PKG_template,FOO,foo,${PKG_VERSION}-${PKG_RELEASE},${PKG_DEPENDS},${PKG_DESCR},${PKG_SECTION})) +21: +22: HOST_STYLE:= auto +23: +24: foo-install: +25: ${INSTALL_DIR} ${IDIR_FOO}/usr/bin +26: ${INSTALL_BIN} ${WRKINST}/usr/bin/foo ${IDIR_FOO}/usr/bin +27: +28: include ${TOPDIR}/mk/host-bottom.mk +29: include ${TOPDIR}/mk/pkg-bottom.mk +------------------------ + +It is important to have foo-host as package build dependency, see line 12, so that the order is always build the host package +and then the target package. +If you need to rebuild a mixed package, you are advised to use: +------------ + $ make package=<package> clean hostpackage package +------------ + +At the moment there is one limitation regarding the recursive dependency resolving. It is just not implemented, yet. +So you always need to set +PKG_BUILDDEP+ to all host tools dependencies in the right order. If package foo needs host +tool bar, and host tool bar needs host library libbaz, you have to use following +PKG_BUILDDEP+ variable: +------------ + PKG_BUILDDEP:=libbaz-host bar-host +------------ + + diff --git a/docs/adding-packages-manual.txt b/docs/adding-packages-manual.txt new file mode 100644 index 000000000..b231c19fb --- /dev/null +++ b/docs/adding-packages-manual.txt @@ -0,0 +1,83 @@ +// -*- mode:doc; -*- +// vim: set syntax=asciidoc: + +Infrastructure for packages with specific build systems +~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ + +By 'packages with specific build systems' we mean all the packages whose build +system is not the standard one, speak 'autotools'. This typically includes +packages whose build system is based on hand-written Makefiles or shell +scripts. + +[[manual-package-tutorial]] + +------------------------------ +01: # This file is part of the OpenADK project. OpenADK is copyrighted +02: # material, please see the LICENCE file in the top-level directory. +03: +04: include $(TOPDIR)/rules.mk +05: +06: PKG_NAME:= libfoo +07: PKG_VERSION:= 1.0 +08: PKG_RELEASE:= 1 +09: PKG_MD5SUM:= eade38998313c25fd7934719cdf8a2ea +10: PKG_DESCR:= foo library +11: PKG_SECTION:= libs +12: PKG_BUILDDEP:= openssl +13: PKG_DEPENDS:= libopenssl +14: PKG_URL:= http://www.libfoo.org/ +15: PKG_SITES:= http://download.libfoo.org/ +16: +17: include $(TOPDIR)/mk/package.mk +18: +19: $(eval $(call PKG_template,LIBFOO,libfoo,${PKG_VERSION}-${PKG_RELEASE},${PKG_DEPENDS},${PKG_DESCR},${PKG_SECTION})) +20: +21: CONFIG_STYLE:= manual +22: BUILD_STYLE:= manual +23: INSTALL_STYLE:= manual +24: +25: do-configure: +26: ${CP} ./files/config ${WRKBUILD}/.config +27: +28: do-build: +29: ${MAKE} -C ${WRKBUILD} all +30: +31: do-install: +32: ${INSTALL_DIR} ${IDIR_LIBFOO}/usr/lib +33: ${CP} ${WRKBUILD}/libfoo.so* ${IDIR_LIBFOO}/usr/lib +34: +35: include ${TOPDIR}/mk/pkg-bottom.mk +-------------------------------- + +The Makefile begins with line 4 with the inclusion of the top level rules.mk +file. After that the Makefile starts on line 6 to 15 with metadata +information: the name of the package (+PKG_NAME+), the version of the package +(+PKG_VERSION+), the release number of the package (+PKG_RELEASE+), which is +used in OpenADK to mark any package updates, the md5 hash of the source archive +(+PKG_MD5SUM+), the short one line description for the package (+PKG_DESCR+), +the package section for the menu configuration system (+PKG_SECTION+), the +package buildtime dependencies (+PKG_BUILDDEP+), the package runtime +dependencies (+PKG_DEPENDS+), the package homepage (+PKG_URL+) and finally the +internet locations at which the tarball can be downloaded from (+PKG_SITES+). +Normally ${PKG_NAME}-${PKG_VERSION}.tar.gz will be downloaded. You can +overwrite the default via the +DISTFILES+ variable. You can add more then one +archive name in +DISTFILES+ via space separated. If you have no source archive +at all, just use the boolean variable +NO_DISTFILES+ and set it to 1. + +On line 17 the +mk/package.mk+ file is included, which contains the PKG_template +function, which is used in line 19. + +On line 21 to 23 we define that the configuration step, the building and install +steps are manually provided. + +On line 25-26 we implement a manual configuration step of the libfoo package +by copying a manually created config file into the build directory. + +On line 28-29 we start the compilation process via make. + +On line 31-33 we install the shared library into the package installation +directory, which is used to create the resulting binary package or tar archive +for the target. + +On line 35 we include +mk/pkg-bottom.mk+, which includes common functions used +by the package fetching and building process. diff --git a/docs/adding-packages.txt b/docs/adding-packages.txt new file mode 100644 index 000000000..122ae6c3c --- /dev/null +++ b/docs/adding-packages.txt @@ -0,0 +1,25 @@ +// -*- mode:doc; -*- +// vim: set syntax=asciidoc: + +[[adding-packages]] +Adding new packages to OpenADK +------------------------------ + +This section covers how new packages (userspace libraries or +applications) can be integrated into OpenADK. It also shows how existing +packages are integrated, which is needed for fixing issues or tuning +their configuration. + +include::adding-packages-directory.txt[] + +include::adding-packages-manual.txt[] + +include::adding-packages-auto.txt[] + +include::adding-packages-host.txt[] + +include::adding-packages-hooks.txt[] + +include::adding-packages-conclusion.txt[] + +include::package-reference.txt[] diff --git a/docs/advanced.txt b/docs/advanced.txt new file mode 100644 index 000000000..4ef75e884 --- /dev/null +++ b/docs/advanced.txt @@ -0,0 +1,15 @@ +// -*- mode:doc; -*- +// vim: set syntax=asciidoc: + +Advanced usage +-------------- + +include::using-openadk-toolchain.txt[] + +include::ccache-support.txt[] + +include::download-location.txt[] + +include::package-make-target.txt[] + +include::using-openadk-development.txt[] diff --git a/docs/appendix.txt b/docs/appendix.txt new file mode 100644 index 000000000..cf004b461 --- /dev/null +++ b/docs/appendix.txt @@ -0,0 +1,8 @@ +// -*- mode:doc; -*- +// vim: set syntax=asciidoc: + +Appendix +======== + +include::network-configuration.txt[] + diff --git a/docs/ccache-support.txt b/docs/ccache-support.txt new file mode 100644 index 000000000..3dfdd1fa2 --- /dev/null +++ b/docs/ccache-support.txt @@ -0,0 +1,21 @@ +// -*- mode:doc; -*- +// vim: set syntax=asciidoc: + +[[ccache]] +Using +ccache+ in OpenADK +~~~~~~~~~~~~~~~~~~~~~~~~~ + +http://ccache.samba.org[ccache] is a compiler cache. It stores the +object files resulting from each compilation process, and is able to +skip future compilation of the same source file (with same compiler +and same arguments) by using the pre-existing object files. When doing +almost identical builds from scratch a number of times, it can nicely +speed up the build process. + ++ccache+ support is integrated in OpenADK. You just have to enable +Use ccache +to speedup recompilation+ in +Globale settings+. This will automatically build ++ccache+ and use it for every target compilation. + +The cache is located in +$HOME/.ccache+. It is stored outside of OpenADK +directory so that it can be shared by separate OpenADK builds. If you want to +get rid of the cache, simply remove this directory. diff --git a/docs/common-usage.txt b/docs/common-usage.txt new file mode 100644 index 000000000..b08475c4d --- /dev/null +++ b/docs/common-usage.txt @@ -0,0 +1,87 @@ +// -*- mode:doc; -*- +// vim: set syntax=asciidoc: + +Daily use +--------- + +Understanding when a full rebuild is necessary +~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ + +OpenADK tries to detect what part of the system should be rebuilt when the +system configuration is changed through +make menuconfig+. In some cases it +automatically rebuilt packages, but sometimes just a warning is printed to the +terminal, that a rebuild is necessary to make the changes an effect. If strange +things are happening, the autodetection might have not worked correctly, then +you should consider to rebuild everything. If you are following development you +should always do a full rebuild after fetching updates via +git pull+. It is +not always required, but if anything fails, you are on your own. +Use following to do a full rebuild without refetching distfiles: + +-------------------- + $ make cleandir && make +-------------------- + +Understanding how to rebuild packages +~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ + +In OpenADK you can rebuild a single package with: +-------------------- + $ make package=<pkgname> clean package +-------------------- + +It will automatically remove all files added to the staging target directory ++target_*+. If you just want to restart compilation process, after making +some fixes in +build_*/w-<pkgname>-<pkgversion>/+, just do: +-------------------- + $ make package=<pkgname> package +-------------------- + +If you are happy with your changes to the package sources, you can automatically +generate a patch, which will be saved in +package/<pkgname>/patches and automatically +applied on the next clean rebuild: +-------------------- + $ make package=<pkgname> update-patches +-------------------- + +The newly created patches will be opened in $EDITOR, so you can some comments to +the top of the file, before the diff. + + +Offline builds +~~~~~~~~~~~~~~ + +If you intend to do an offline build and just want to download +all sources that you previously selected in the configurator +then issue: + +-------------------- + $ make download +-------------------- + +You can now disconnect or copy the content of your +dl+ +directory to the build-host. + +[[env-vars]] + +Environment variables +~~~~~~~~~~~~~~~~~~~~~ + +OpenADK also honors some environment variables, when they are passed +to +make+. + +* +ARCH+, the architecture of the target system +* +SYSTEM+, the target system name +* +LIBC+, the C library for the target system +* +COLLECT+, the package collection, which will be used +* +VERBOSE+, verbose build, when set to 1 + +An example that creates a configuration file for Raspberry PI with all +software packages enabled, but not included in the resulting firmware image: + +-------------------- + $ make ARCH=arm SYSTEM=raspberry-pi LIBC=musl allmodconfig +-------------------- + +This is often used in the development process of a target system, to verify that +all packages are compilable. + diff --git a/docs/configure.txt b/docs/configure.txt new file mode 100644 index 000000000..3fadc1f48 --- /dev/null +++ b/docs/configure.txt @@ -0,0 +1,68 @@ +// -*- mode:doc; -*- +// vim: set syntax=asciidoc: + +[[toolchain]] + +Cross-compilation toolchain +--------------------------- + +A compilation toolchain is the set of tools that allows you to compile +code for your system. It consists of a compiler (in our case, +gcc+), +binary utils like assembler and linker (in our case, +binutils+) and a +C standard library (either +http://www.gnu.org/software/libc/libc.html[GNU Libc], +http://www.uclibc.org/[uClibc] or +http://www.musl-libc.org/[musl]). + +The system installed on your development station certainly already has +a compilation toolchain that you can use to compile an application +that runs on your system. If you're using a PC, your compilation +toolchain runs on an x86 processor and generates code for an x86 +processor. Under most Linux systems, the compilation toolchain uses +the GNU libc (glibc) as the C standard library. This compilation +toolchain is called the "host compilation toolchain". The machine on +which it is running, and on which you're working, is called the "host +system" footnote:[This terminology differs from what is used by GNU +configure, where the host is the machine on which the application will +run (which is usually the same as target)]. + +The compilation toolchain is provided by your distribution, and +OpenADK has nothing to do with it (other than using it to build a +cross-compilation toolchain and other tools that are run on the +development host). + +As said above, the compilation toolchain that comes with your system +runs on and generates code for the processor in your host system. As +your embedded system has a different processor, you need a +cross-compilation toolchain - a compilation toolchain that runs on +your _host system_ but generates code for your _target system_ (and +target processor). For example, if your host system uses x86 and your +target system uses ARM, the regular compilation toolchain on your host +runs on x86 and generates code for x86, while the cross-compilation +toolchain runs on x86 and generates code for ARM. + +OpenADK provides only one solution for the cross-compilation toolchain. +The versions for binutils, gcc, gdb and libc are fixed. It is a combination +of mostly the latest versions, which are known to work in this combination +and are known to produce usable firmware images. You normally do not need to +know the deep details, it is part of OpenADK policy to keep this part +simple for the user. + +You can only choose between three C libraries: +http://www.uclibc.org[uClibc], the +http://www.gnu.org/software/libc/libc.html[glibc] and +http://www.musl-libc.org[musl]. + +There are some minimal configuration options provided in +Toolchain settings+. +You can enable or disable the building of following components and toolchain +options: + +* GDB (enabled by default) + +* GNU C++ compiler (enabled by default, when disabled + will prevent some packages to show up in the menu selection) + +* Stack Smashing Support (SSP) support for GNU C/C++ Compiler (experimental, some packages will fail to build) + +* Link Time Optimization (LTO) support for GNU C/C++ Compiler (experimental, some packages will fail to build) + diff --git a/docs/contribute.txt b/docs/contribute.txt new file mode 100644 index 000000000..909263886 --- /dev/null +++ b/docs/contribute.txt @@ -0,0 +1,87 @@ +// -*- mode:doc; -*- +// vim: set syntax=asciidoc: + +Contributing to OpenADK +======================= + +If you want to contribute to OpenADK, you will need a git view of +the project. Refer to xref:getting-openadk[] to get it. + +Currently a mail to wbx@openadk.org is the central place for contribution. + +[[submitting-patches]] +Submitting patches +------------------ + +When your changes are done, and committed in your local git view, +_rebase_ your development branch on top of the upstream tree before +generating the patch set. To do so, run: + +--------------------- +$ git fetch --all --tags +$ git rebase origin/master +--------------------- + +Here, you are ready to generate then submit your patch set. + +To generate it, run: + +--------------------- +$ git format-patch -M -n -s origin/master +--------------------- + +This will generate patch files automatically adding the +Signed-off-by+ line. + +Once patch files are generated, you can review/edit the commit message +before submitting them using your favorite text editor. + +Lastly, send/submit your patch set to the OpenADK developer: + +--------------------- +$ git send-email --to wbx@openadk.org *.patch +--------------------- + +Note that +git+ should be configured to use your mail account. +To configure +git+, see +man git-send-email+ or google it. + +Make sure posted *patches are not line-wrapped*, otherwise they cannot +easily be applied. In such a case, fix your e-mail client, or better, +use +git send-email+ to send your patches. + +Cover letter +~~~~~~~~~~~~ + +If you want to present the whole patch set in a separate mail, add ++--cover-letter+ to the +git format-patch+ command (see +man +git-format-patch+ for further information). This will generate a +template for an introduction e-mail to your patch series. + +A 'cover letter' may be useful to introduce the changes you propose +in the following cases: + +* large number of commits in the series; + +* deep impact of the changes in the rest of the project; + +* RFC footnote:[RFC: (Request for comments) change proposal]; + +* whenever you feel it will help presenting your work, your choices, + the review process, etc. + +[[reporting-bugs]] +Reporting issues/bugs, get help +------------------------------- + +Try to think as if you were trying to help someone else; in +that case, what would you need? + +Here is a short list of details to provide in such case: + +* host machine (OS/release) +* git version of OpenADK +* target for which the build fails +* package(s) which the build fails +* the command that fails and its output +* any information you think that may be relevant + +Additionally, you can add the +.config+ file. diff --git a/docs/customize-busybox-config.txt b/docs/customize-busybox-config.txt new file mode 100644 index 000000000..dc1c7abaa --- /dev/null +++ b/docs/customize-busybox-config.txt @@ -0,0 +1,20 @@ +// -*- mode:doc; -*- +// vim: set syntax=asciidoc: + +[[busybox-custom]] +Customizing the Busybox configuration +~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ + +http://www.busybox.net/[Busybox] is very configurable, and you may +want to customize it. You can just configure it via +Package selection+, ++Base System+, +Busybox Configuration+. The menu based busybox configuration +is mostly integrated into OpenADK. There are some options, which are not +available and not supported. If you need to, you can change the defaults +in +package/busybox/config+ and regenerate your OpenADK configuration. + +A change in the busybox configuration will rebuild the busybox package. If you +choose another implementation of f.e. tar, which is provided by default from +busybox, tar in busybox will be deactivated and the package will be +automatically rebuilded, so that your resulting firmware images or archives +will only contain a single tar program. Obviosly just the one you have +selected. diff --git a/docs/customize-kernel-config.txt b/docs/customize-kernel-config.txt new file mode 100644 index 000000000..9adeb7a9d --- /dev/null +++ b/docs/customize-kernel-config.txt @@ -0,0 +1,48 @@ +// -*- mode:doc; -*- +// vim: set syntax=asciidoc: + +[[kernel-custom]] +Customizing the Linux kernel configuration +~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ + +The Linux kernel configuration can be customized using +make menuconfig+. +OpenADK uses a combination of Linux miniconfig feature and user defined +features to generate a valid Linux configuration for your target. +Some features and drivers are not selectable via +make menuconfig+, either +because your choosen target system does not have support for it or the +option is not implemented, yet. OpenADK uses some kind of abstraction +layer between the real full featured and complicated Linux kernel configuration +and you. It is not perfect and does include a lot of manual work in ++target/linux/config+, but it works in a acceptable way. + +If you just want to view the Linux configuration, which is actually +used for your target, you can execute following command: + +--------------- + $ make kernelconfig +--------------- + +Any changes here will get lost and will not be used to generate a kernel for +your target. If you want to change the existing kernel configuration you need +to follow these steps. + +The basic kernel configuration used for your choosen target is concatenated from +following two files: ++target/linux/kernel.config+ and +target/<arch>/kernel/<system>+. + +So if you would like to change any basic stuff, just edit the files and recreate your +firmware via: + +--------------- + $ make +--------------- + +OpenADK automatically recognizes any change and will rebuild the kernel. + +The base kernel configuration for your target generated by OpenADK is normally just enough to +bootup the system with support for your board, serial console, network card and boot medium. +(like a hard disk, sd card or flash partition) + +If you need to enable some new optional drivers or features, which are not available in ++make menuconfig+, you need to dig in +target/linux/config+. There is the abstraction layer +for the real kernel configuration. diff --git a/docs/customize-libc-config.txt b/docs/customize-libc-config.txt new file mode 100644 index 000000000..075a272a0 --- /dev/null +++ b/docs/customize-libc-config.txt @@ -0,0 +1,33 @@ +// -*- mode:doc; -*- +// vim: set syntax=asciidoc: + +[[libc-custom]] +Customizing the libc configuration +~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ + +Just like xref:busybox-custom[BusyBox], http://www.uclibc.org/[uClibc] +offers a lot of configuration options. They allow you to select +various functionalities depending on your needs and limitations. +OpenADK chooses automatically the best configuration regarding +resulting code size, standard conformance, portability and GNU +libc compatibility. + +If you still have the requirements to change the default, regenerate +a new uClibc config from the existing one: + +---------------- + $ tar xvf dl/uClibc-x.y.z.tar.bz2 + $ cd uClibc-x.y.z && patch -p1 <../toolchain/uClibc/patches/uclibc-git*.patch + $ cp ../target/<arch>/uclibc.config .config + $ make menuconfig +---------------- + +Make all required changes. Then copy the newly created uClibc configuration back +and rebuild your targetsystem, including the toolchain components: + +---------------- + $ cp .config ../target/<arch>/uclibc.config + $ cd .. && make cleantarget && make +---------------- + +There are no customization options for GNU libc or musl available. diff --git a/docs/customize-outside-adk.txt b/docs/customize-outside-adk.txt new file mode 100644 index 000000000..575defa82 --- /dev/null +++ b/docs/customize-outside-adk.txt @@ -0,0 +1,154 @@ +// -*- mode:doc -*- ; + +[[outside-adk-custom]] +Keeping customizations outside OpenADK +~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ + +The OpenADK project recommends and encourages upstreaming to the +official OpenADK version the packages and board support that are +written by developers. However, it is sometimes not possible or +desirable because some of these packages or board support are highly +specific or proprietary. + +In this case, OpenADK users are offered following choice using +here own git repository. + +* Initialize your project + +Personalize your Git environment via: + +--------------------- + $ git config --global user.name "Waldemar Brodkorb" + $ git config --global user.email wbx@openadk.org +--------------------- + +Get the latest version of OpenADK via anonymous git: + +--------------------- + $ git clone --bare git://openadk.org/git/openadk myadk.git +--------------------- + +Use git-daemon to make the repository public to your developers. After that clone your new shared project repository: + +--------------------- + $ git clone git+ssh://myserver.com/git/myadk.git + $ cd myadk +--------------------- + +Configure OpenADK remote git repository: + +--------------------- + $ git remote add openadk git://openadk.org/git/openadk +--------------------- + +* Create your firmware + +Now you can either start with the latest version or use some older version: + +--------------------- + $ git checkout -b stable_1_0 $sha1 +--------------------- +You can find $sha1 via git log. $sha1 is the hash after the keyword “commit”. + +Now build a firmware image for your target and test it. Fix bugs in the build +environment or add new stuff. You can use the “extra” directory to add local +unpackaged binaries and/or configuration files to overwrite packaged stuff. + +Check your uncommitted changes: + +--------------------- + $ git status + $ git diff --cached + $ git diff +--------------------- + +Commit your git-added changes: + +--------------------- + $ git commit +--------------------- +Or just commit all changes: + +--------------------- + $ git commit -a +--------------------- +It is a good style to make a lot of small atomic commits. + +Push your changes back to your git repository. +For new local branches: + +--------------------- + $ git push origin stable_1_0 +--------------------- + +Or in regulary usage via: +--------------------- + $ git push +--------------------- + +* Working together with OpenADK + +You can generate patches from all your changes against the remote master: + +--------------------- + $ git format-patch -s origin +--------------------- + +Send all relevant patches to OpenADK author via eMail. + +Update your master with changes from OpenADK: + +--------------------- + $ git checkout master + $ git pull openadk master +--------------------- + +If you want you can merge all changes to your branch: + +--------------------- + $ git checkout stable_1_0 + $ git merge master +--------------------- + +Or just cherry-pick some of the commits: + +--------------------- + $ git cherry-pick $sha1 +--------------------- + +* Releasing + +Tag your tested stable branch: + +--------------------- + $ git tag -a stable_1.0 +--------------------- +Push your tag to your repository: + +--------------------- + $ git push origin stable_1.0 +--------------------- + +Checkout your tag and build your firmware: + +--------------------- + $ git clone git+ssh://myserver.com/git/myadk.git mytag + $ cd mytag + $ git checkout stable_1.0 +--------------------- + +* Deleting unused branches + +Deleting branches remotely: + +--------------------- + $ git branch -r + $ git push origin :branchname +--------------------- + +Deleting branches locally: + +--------------------- + $ git branch + $ git branch -D branchname +--------------------- diff --git a/docs/customize-rootfs.txt b/docs/customize-rootfs.txt new file mode 100644 index 000000000..b21b82209 --- /dev/null +++ b/docs/customize-rootfs.txt @@ -0,0 +1,23 @@ +// -*- mode:doc; -*- +// vim: set syntax=asciidoc: + +[[rootfs-custom]] +Customizing the generated target filesystem +~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ + +Besides changing one or another configuration through +make menuconfig+, +there are is a way to customize the resulting target filesystem. + +Create a new directory called +extra+ in the top OpenADK directory. +Put there a tree of directories and files that will be copied directly +over the target filesystem (+root_*+) after everything is build, but +before the firmware images or archives are created. + +You can also point to another directory via: +--------------- + $ make extra=/foo/bar +--------------- + +You can start with the example configuration files from +root_*+. +The +extra+ directory will never be deleted by any clean target to avoid +loss of customized configuration data. diff --git a/docs/customize-store.txt b/docs/customize-store.txt new file mode 100644 index 000000000..d0c209273 --- /dev/null +++ b/docs/customize-store.txt @@ -0,0 +1,14 @@ +// -*- mode:doc; -*- +// vim: set syntax=asciidoc: + +[[customize-store]] +Storing the configuration +~~~~~~~~~~~~~~~~~~~~~~~~~ + +When you have a OpenADK configuration that you are satisfied with and +you want to share it with others, put it under revision control or move +on to a different OpenADK project. + +You just need to copy your .config and extra directory to regenerate your +firmware images on another system. The used config is, if not explicitely disabled, +saved on the target in +/etc/adkconfig.gz+. diff --git a/docs/customize-toolchain.txt b/docs/customize-toolchain.txt new file mode 100644 index 000000000..8a14d4bbb --- /dev/null +++ b/docs/customize-toolchain.txt @@ -0,0 +1,23 @@ +// -*- mode:doc; -*- +// vim: set syntax=asciidoc: + +[[toolchain-custom]] +Customizing the toolchain +~~~~~~~~~~~~~~~~~~~~~~~~~ + +There is no simple way to change anything for the toolchain. +OpenADK chooses the best combination of the toolchain components to +provide you with a working and recent system. + +If you like to change the version of a component, add patches or like +to change the configure options, you need to dig into the +toolchain+ directory. + +For example to change the version of gcc, you need to change +toolchain/gcc/Makefile.inc+. +Be aware of the fact, that this is used for the +package/gcc/Makefile+ and therefore for +the gcc running on your target. + +OpenADK supports running a cross-compiled toolchain on your target. You can even use OpenADK +buildsystem on your target. There is a package collection called +development+, which does +configure OpenADK to include all required software to use OpenADK on your target. + + diff --git a/docs/customize.txt b/docs/customize.txt new file mode 100644 index 000000000..81fe18e02 --- /dev/null +++ b/docs/customize.txt @@ -0,0 +1,19 @@ +// -*- mode:doc; -*- +// vim: set syntax=asciidoc: + +Customization +------------- + +include::customize-rootfs.txt[] + +include::customize-busybox-config.txt[] + +include::customize-libc-config.txt[] + +include::customize-kernel-config.txt[] + +include::customize-toolchain.txt[] + +include::customize-store.txt[] + +include::customize-outside-adk.txt[] diff --git a/docs/debugging-openadk.txt b/docs/debugging-openadk.txt new file mode 100644 index 000000000..ba48b273e --- /dev/null +++ b/docs/debugging-openadk.txt @@ -0,0 +1,29 @@ +// -*- mode:doc; -*- +// vim: set syntax=asciidoc: + +[[debugging-openadk]] + +Debugging OpenADK +----------------- + +To analyze any build problems, use verbose output: + +---- + $ make v +---- + +To analyze any inter package dependency problems, use make debug output: + +---- + $ make --debug=b +---- + +If you have a problem with a specific package, use following command +to capture the output and send it to the OpenADK developer: + +---- + $ make package=<pkgname> clean package > pkgname.log 2>&1 +---- + + + diff --git a/docs/developer-guide.txt b/docs/developer-guide.txt new file mode 100644 index 000000000..d4975027a --- /dev/null +++ b/docs/developer-guide.txt @@ -0,0 +1,13 @@ +// -*- mode:doc; -*- +// vim: set syntax=asciidoc: + +Developer Guidelines +==================== + +include::writing-rules.txt[] + +include::adding-packages.txt[] + +include::patch-policy.txt[] + +include::debugging-openadk.txt[] diff --git a/docs/download-location.txt b/docs/download-location.txt new file mode 100644 index 000000000..50088b57a --- /dev/null +++ b/docs/download-location.txt @@ -0,0 +1,26 @@ +// -*- mode:doc; -*- +// vim: set syntax=asciidoc: + +Location of downloaded packages +~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ + +The various tarballs that are downloaded by OpenADK are all stored +in +ADK_DL_DIR+, which by default is the +dl+ directory. If you want +to keep a complete version of OpenaDK which is known to be working +with the associated tarballs, you can make a copy of this directory. +This will allow you to regenerate the toolchain and the target +filesystem with exactly the same versions. + +If you maintain several OpenADK trees, it might be better to have a +shared download location. This can be achieved by pointing the ++DL_DIR+ environment variable to a directory. If this is +set, then the value of +ADK_DL_DIR+ in the OpenADK configuration is +overridden. The following line should be added to +<~/.bashrc>+. + +----------------- + $ export DL_DIR=<shared download location> +----------------- + +The download location can also be set in the +.config+ file, with the ++ADK_DL_DIR+ option. Unlike most options in the .config file, this value +is overridden by the +DL_DIR+ environment variable. diff --git a/docs/faq-troubleshooting.txt b/docs/faq-troubleshooting.txt new file mode 100644 index 000000000..84059b2f9 --- /dev/null +++ b/docs/faq-troubleshooting.txt @@ -0,0 +1,58 @@ +// -*- mode:doc; -*- +// vim: set syntax=asciidoc: + +Frequently Asked Questions & Troubleshooting +============================================ + +[[faq-no-doc-on-target]] +Why is there no documentation on the target? +-------------------------------------------- + +Because OpenADK mostly targets _small_ or _very small_ target +hardware with limited resource onboard (CPU, ram, mass-storage), it +does not make sense to waste space with the documentation data. + +If you need documentation data on your target anyway, then OpenADK +is not suitable for your purpose, and you should look for a _real +distribution_. + +[[faq-no-locale-on-target]] +Why is there no locale support on the target? +--------------------------------------------- + +OpenADK tries to create a simple and small Linux system, which +has no fancy features enabled. Locale support on a headless system, +like a router is not useful anyway. To avoid bloat, it is a design +decision to not have any locale support. Developers and users +still could add any kind of user interface with internationalization +features. + +[[faq-why-not-visible-package]] +Why are some packages not visible in the OpenADK config menu? +------------------------------------------------------------- + +If a package exists in the OpenADK tree and does not appear in the +config menu, this most likely means that some of the package's +dependencies are not met. + +To know more about the dependencies of a package, search for the +package symbol in the config menu (see xref:make-tips[]). + +Then, you may have to recursively enable several options (which +correspond to the unmet dependencies) to finally be able to select +the package. + +If the package is not visible due to some unmet dependency to another +C library, either consider to switch to another C library or fix the +package so that it works with your configured library. For this you +need to add your C library to PKG_LIBC_DEPENDS in +package/<pkgname>/Makefile+. + +[[faq-no-web-interface]] +Why is there no web based configuration interface available? +------------------------------------------------------------ + +OpenADK provides a basic root filesystem for your embedded device. +If you need a web based configuration interface for your own appliance, +just write one. There are plenty of possibilities. You could use +Lighttpd with PHP or an C++ application server like Tntnet. + diff --git a/docs/getting.txt b/docs/getting.txt new file mode 100644 index 000000000..534ba99c9 --- /dev/null +++ b/docs/getting.txt @@ -0,0 +1,22 @@ +// -*- mode:doc; -*- +// vim: set syntax=asciidoc: + +[[getting-openadk]] +Getting OpenADK +--------------- + +OpenADK does not have any releases. Only direct Git +access is possible. + +To download OpenADK using Git just do: + +--------------------- + $ git clone git://openadk.org/git/openadk +--------------------- + +Or if you prefer HTTP or using Git behind a proxy: + +--------------------- + $ git clone http://git.openadk.org/openadk.git +--------------------- + diff --git a/docs/going-further.txt b/docs/going-further.txt new file mode 100644 index 000000000..2cabb62ed --- /dev/null +++ b/docs/going-further.txt @@ -0,0 +1,9 @@ +// -*- mode:doc; -*- +// vim: set syntax=asciidoc: + +Going further in OpenADK's innards +==================================== + +include::how-openadk-works.txt[] + +include::advanced.txt[] diff --git a/docs/how-openadk-works.txt b/docs/how-openadk-works.txt new file mode 100644 index 000000000..9c6ae167d --- /dev/null +++ b/docs/how-openadk-works.txt @@ -0,0 +1,80 @@ +// -*- mode:doc; -*- +// vim: set syntax=asciidoc: + +How OpenADK works +----------------- + +As mentioned above, OpenADK is basically a set of Makefiles that +download, configure, and compile software with the correct options. It +also includes patches for various software packages and the linux kernel. + +There is basically one Makefile per software package. Makefiles are split into +many different parts. + +* The +toolchain/+ directory contains the Makefiles + and associated files for all software related to the + cross-compilation toolchain: +binutils+, +gcc+, +gdb+, + +kernel-headers+ and +libc+. + +* The +target/+ directory contains the definitions for all the processor + architectures that are supported by OpenADK. +target/linux+ contains + the meta-data for the Linux kernel configuration abstraction layer and + the kernel patches + +* The +package/+ directory contains the Makefiles and + associated files for all user-space tools and libraries that OpenADK + can compile and add to the target root filesystem. There is one + sub-directory per package. + +* The +mk/+ directory contains some globally used Makefiles with + the suffix +.mk+, these are used in all other Makefile via include + +* The +tools/+ directory contains the Makefiles and + associated files for software related to the generation of the + host tools needed for different tasks (compression tools, ..). + +There are three other directories in the top level directory of OpenADK: + +* The +scripts/+ directory contains shell scripts for the creation of + meta-data in OpenADK, install scripts and image creation scripts + +* The +config/+ directory contains the application used for the + +make menuconfig+ system + +* The +tests/+ directory contains some data for the +make check+ target, + to run the gcc testsuite + +The main Makefile performs the following steps before the configuration +is done: + +* Call the +prereq+ target to check if the host system have all required + software installed. It creates the +prereq.mk+ Makefile. + +* Compile and run the OpenADK tools to generate the meta-data for the menu + based configuration and creates the +package/Depends.mk+ Makefile to handle the + dependencies + +* Starts the menu based configuration system via +make menuconfig+ + +The main Makefile performs the following steps, once the +configuration is done (it is mainly a wrapper for +mk/build.mk+): + +* Create all the output directories: +host_<gnu_host_name>+, +target_<arch>_<libc>+, +build_<arch>_<libc>+, + +pkg_<arch>_<libc>+, etc. + +* Call the +scan-pkgs.sh+ script to find any needed optional host software, needed to compile + software the user has configured + +* Call the +update-sys+ and +update-pkg+ scripts to generate some meta-data for + available systems and package collections + +* Generate the host tools required for different tasks (encrypting passwords, + compressing data, extracting archives, ..) + +* Generate the cross-compilation toolchain (binutils, gcc, libc, gdb) + +* Compile the linux kernel + +* Compile all the userspace packages, the boot loader and external kernel modules + +* Generate the firmware images or archives diff --git a/docs/images/menuconfig-configured.png b/docs/images/menuconfig-configured.png Binary files differnew file mode 100644 index 000000000..cad536cc9 --- /dev/null +++ b/docs/images/menuconfig-configured.png diff --git a/docs/images/menuconfig.png b/docs/images/menuconfig.png Binary files differnew file mode 100644 index 000000000..5624a2982 --- /dev/null +++ b/docs/images/menuconfig.png diff --git a/docs/introduction.txt b/docs/introduction.txt new file mode 100644 index 000000000..991747672 --- /dev/null +++ b/docs/introduction.txt @@ -0,0 +1,26 @@ +// -*- mode:doc; -*- +// vim: set syntax=asciidoc: + +About OpenADK +============= + +OpenADK is a tool that simplifies and automates the process of +building a complete Linux system for an embedded system, using +cross-compilation. ADK stands for appliance development kit. + +In order to achieve this, OpenADK is able to generate a +cross-compilation toolchain, a root filesystem, a Linux kernel image +and a bootloader for your target. + +OpenADK is useful mainly for people working with embedded systems, +but can be used by people playing with emulators (like Qemu, Virtualbox +or Aranym) or small netbooks (like Lemote Yeelong) needing a fast +and small Linux system. + +Embedded systems often use processors that are not the regular x86 +processors everyone is used to having in his PC. They can be PowerPC +processors, MIPS processors, ARM processors, etc. + +OpenADK supports numerous processors and their variants; it also comes +with default configurations for some embedded systems and netbooks. +(Raspberry PI, Sharp Zaurus, Lemote Yeelong, IBM X40 and more) diff --git a/docs/legal-notice.txt b/docs/legal-notice.txt new file mode 100644 index 000000000..6b1546ef0 --- /dev/null +++ b/docs/legal-notice.txt @@ -0,0 +1,51 @@ +// -*- mode:doc; -*- +// vim: set syntax=asciidoc: + +[[legal-info]] + +Legal notice and licensing +========================== + +Complying with open source licenses +----------------------------------- + +All of the end products of OpenADK (toolchain, root filesystem, kernel, +bootloaders) contain open source software, released under various licenses. + +Using open source software gives you the freedom to build rich embedded +systems, choosing from a wide range of packages, but also imposes some +obligations that you must know and honour. +Some licenses require you to publish the license text in the documentation of +your product. Others require you to redistribute the source code of the +software to those that receive your product. + +The exact requirements of each license are documented in each package, and +it is your responsibility (or that of your legal office) to comply with those +requirements. + +Complying with the OpenADK license +---------------------------------- + +OpenADK itself is an open source software, released under the +http://www.gnu.org/licenses/old-licenses/gpl-2.0.html[GNU General Public +License, version 2] or (at your option) any later version. +However, being a build system, it is not normally part of the end product: +if you develop the root filesystem, kernel, bootloader or toolchain for a +device, the code of OpenADK is only present on the development machine, not +in the device storage. + +Nevertheless, the general view of the OpenADK developer is that you should +release the OpenADK source code along with the source code of other packages +when releasing a product that contains GPL-licensed software. +This is because the +http://www.gnu.org/licenses/old-licenses/gpl-2.0.html[GNU GPL] +defines the "'complete source code'" for an executable work as "'all the +source code for all modules it contains, plus any associated interface +definition files, plus the scripts used to control compilation and installation +of the executable'". +OpenADK is part of the 'scripts used to control compilation and +installation of the executable', and as such it is considered part of the +material that must be redistributed. + +Keep in mind that this is only the OpenADK developer opinion, and you +should consult your legal department or lawyer in case of any doubt. diff --git a/docs/make-tips.txt b/docs/make-tips.txt new file mode 100644 index 000000000..787121cb4 --- /dev/null +++ b/docs/make-tips.txt @@ -0,0 +1,99 @@ +// -*- mode:doc; -*- +// vim: set syntax=asciidoc: + +[[make-tips]] +'make' tips +----------- + +This is a collection of tips that help you make the most of OpenADK. + +.Configuration searches: + +The +make menuconfig+ command offer a search tool. +The search tool is called by pressing +/+; +The result of the search shows the help message of the matching items. + +.Display all commands executed by make: + +-------------------- + $ make v +-------------------- + +or + +-------------------- + $ make VERBOSE=1 <target> +-------------------- + +.Display all available targets: + +-------------------- + $ make help +-------------------- + +.Cleaning: + +There are different cleaning targets available. If a full clean is +necessary, you normally will get a message from OpenADK. +To delete all build products (including build directories, target, host +and pkg trees, the firmware and the toolchain for all targets): + +-------------------- + $ make cleandir +-------------------- + +If you only want to clean your specific configured target, just use: + +-------------------- + $ make cleantarget +-------------------- + +If you even want to clean any downloaded source: + +-------------------- + $ make distclean +-------------------- + +If you only want to clean the kernel build, because you added or +removed some patch, just do: + +-------------------- + $ make cleankernel +-------------------- + +This is automatically triggered if you change the kernel version in +your configuration. + +If you just want to clean all packages and wants to rebuild the firmware, +(the tools/toolchain is not deleted) just use: + +-------------------- + $ make clean +-------------------- + +.Resetting OpenADK for a new target: + +You can either delete the configuration and start from scratch: + +-------------------- + $ rm .config* + $ make menuconfig +-------------------- + +Or you can save your existing configuration and switch to a new +one with: + +-------------------- + $ make switch +-------------------- + +Afterwards you can switch back to your old configuration, you just +need to remember, which architecture and system you had configured: + +-------------------- + $ make switch ARCH=<arch> SYSTEM=<system> +-------------------- + +OpenADK is designed to have multiple architectures and embedded system +combinations configured and build without a need to rebuild everything +from scratch. There is no limit, you just need to have enough disk space. diff --git a/docs/manual.txt b/docs/manual.txt new file mode 100644 index 000000000..38700e45c --- /dev/null +++ b/docs/manual.txt @@ -0,0 +1,33 @@ +// -*- mode:doc; -*- +// vim: set syntax=asciidoc: + +The OpenADK user manual +======================= +:toc: + +OpenADK usage and documentation by Waldemar Brodkorb. + +(based on the buildroot manual by Thomas Petazzoni. Contributions from Karsten Kruse, Ned Ludd, Martin Herren and others. +See http://www.buildroot.net for the original text). + +:leveloffset: 1 + +include::introduction.txt[] + +include::starting-up.txt[] + +include::working-with.txt[] + +include::faq-troubleshooting.txt[] + +include::running-openadk.txt[] + +include::going-further.txt[] + +include::developer-guide.txt[] + +include::legal-notice.txt[] + +include::contribute.txt[] + +include::appendix.txt[] diff --git a/docs/network-configuration.txt b/docs/network-configuration.txt new file mode 100644 index 000000000..ea869c0bc --- /dev/null +++ b/docs/network-configuration.txt @@ -0,0 +1,182 @@ +// -*- mode:doc; -*- +// vim: set syntax=asciidoc: + +[[network-configuration]] +Network configuration +~~~~~~~~~~~~~~~~~~~~~ + +loopback devices +^^^^^^^^^^^^^^^^ + +Example for loopback device configuration: + +--------------------- +auto lo +iface lo inet loopback +--------------------- + +static network configuration +^^^^^^^^^^^^^^^^^^^^^^^^^^^^ + +Example for an ethernet network card: + +--------------------- +auto eth0 +iface eth0 inet static + address 192.168.1.1 + netmask 255.255.255.0 + broadcast + + gateway 192.168.1.254 +--------------------- + +The DNS resolver must be manually configured in /etc/resolv.conf. +The plus for the broadcast value, will calculate the correct broadcast address for the network. + +dynamic network configuration +^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ + +Example for an ethernet network card: + +--------------------- +auto eth0 +iface eth0 inet dhcp +--------------------- + +bridge configuration +^^^^^^^^^^^^^^^^^^^^ + +Example for a network bridge with two ethernet network interfaces and an ip address: + +--------------------- +auto br0 +iface br0 inet static + address 192.168.99.1 + netmask 255.255.255.0 + broadcast + + bridge-ports eth0 eth1 +--------------------- + +Just a bridge without an ip address: +--------------------- +auto br0 +iface br0 inet manual + bridge-ports eth0 eth1 +--------------------- + +You need to install either Busybox brctl applet or the bridge-utils package. The required kernel modules will be automatically selected. + +VLAN network interfaces +^^^^^^^^^^^^^^^^^^^^^^^ + +Example configuration of a network interface with VLAN ID 8 without any ip configuration: + +--------------------- +auto eth0.8 +iface eth0.8 inet manual +--------------------- + +You need to install Busybox vconfig applet. The required kernel modules will be automatically selected. + +PPP over Ethernet +^^^^^^^^^^^^^^^^^ + +Typical DSL configuration: + +--------------------- +auto ppp0 +iface ppp0 inet ppp + use-template pppoe + provider isp + ppp-mtu 1412 + ppp-username foo + ppp-password bar + ppp-device eth1 +--------------------- + +The provider can be used as argument for "pon" and "poff" commands. +You need to install the ppp and ppp-mod-pppoe package. The required kernel modules will be automatically selected. + +wireless client configuration +^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ + +Example wireless client configuration, secured with WPA2: + +--------------------- +auto wlan0 +iface wlan0 inet dhcp + wireless-ssid myap + wireless-channel 11 + wireless-mode sta + wireless-security wpa2 + wireless-passphrase xxxxxx +--------------------- + +You need to install iw and wpa_supplicant packages. For older wireless drivers you +need to install wireless-tools instead of iw and use the following variable to choose the right tools: + +--------------------- +wireless-extension 1 +--------------------- + +wireless accesspoint configuration +^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ + +To configure an access point use following example: + +--------------------- +auto wlan0 +iface wlan0 inet static + address 192.168.40.10 + netmask 255.255.255.0 + broadcast + + wireless-ssid myap + wireless-channel 8 + wireless-mode ap + wireless-security wpa2 + wireless-passphrase xxxxxx +--------------------- + +You need to install hostapd and iw/wireless-tools packages. + +hso umts modem +^^^^^^^^^^^^^^ + +If you have a HSO UMTS modem, you can use following to configure internet access: +--------------------- +auto hso0 +iface hso0 inet manual + pin 1234 + apn your.apn +--------------------- + +ATM configuration +^^^^^^^^^^^^^^^^^ + +For example a configuration on a Linksys AG241 router with integrated DSL modem, +you can configure two ATM devices to distinguish between Internet and IPTV traffic: + +--------------------- +auto eth0.1 +iface eth0.1 inet manual + +auto eth0.8 +iface eth0.8 inet manual + +auto nas0 +iface nas0 inet manual + +auto nas1 +iface nas1 inet manual + atm-vpi 1 + atm-vci 34 + +auto br0 +iface br0 inet manual + bridge-ports eth0.1 nas0 + +auto br1 +iface br1 inet manual + bridge-ports eth0.8 nas1 +--------------------- + +More network setups can be implemented on request. diff --git a/docs/package-make-target.txt b/docs/package-make-target.txt new file mode 100644 index 000000000..13c498062 --- /dev/null +++ b/docs/package-make-target.txt @@ -0,0 +1,52 @@ +// -*- mode:doc; -*- +// vim: set syntax=asciidoc: + +[[pkg-build-steps]] + +Package-specific _make_ targets +~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ + +Running +make package=<package> package+ builds and installs that particular package. +Be aware of the fact, that no build dependencies are resolved using this method! + +For packages relying on the OpenADK infrastructure, there are +numerous special make targets that can be called independently like +this: + +------------ + $ make package=<package> <target> +------------ + +The package build targets are (in the order they are executed): + +[width="90%",cols="^1,4",options="header"] +|=================================================== +| command/target | Description + +| +fetch+ | Fetch the source + +| +extract+ | Put the source in the package build directory + +| +patch+ | Apply the patches, if any + +| +configure+ | Run the configure commands, if any + +| +build+ | Run the compilation commands + +| +fake+ | Run the installation of the package into a fake directory + +| +package+ | Create a package or tar archive of the package files + +|=================================================== + +Additionally, there are some other useful make targets: + +[width="90%",cols="^1,4",options="header"] +|=================================================== +| command/target | Description + +| +clean+ | Remove the whole package build directory + +| +host-package+ | Build and install the host binaries and libraries + +|=================================================== diff --git a/docs/package-reference.txt b/docs/package-reference.txt new file mode 100644 index 000000000..650694bf2 --- /dev/null +++ b/docs/package-reference.txt @@ -0,0 +1,135 @@ +[[package-reference]] + ++package+ Reference +~~~~~~~~~~~~~~~~~~~ + +The list of variables that can be set in a +Makefile+ to give metadata +information is: + +* +PKG_NAME+, mandatory, must contain the name of the package. + +* +PKG_VERSION+, mandatory, must contain the version of the package. + +* +PKG_RELEASE+, mandatory, must contain the OpenADK specific release of the package. + +* +PKG_MD5SUM+, mandatory, must contain the MD5 hash of the package, will be used + to check if a download of a package is complete. + +* +PKG_SECTION+, mandatory, must contain the OpenADK specific section, see package/section.lst. + +* +PKG_RELEASE+, mandatory, must contain an one line summary of the package description. + +* +PKG_URL+, optional, may contain the url to the homepage of the package + +* +PKG_SITES+, mandatory, must contain the download url for the package, multiple entries + with space separated, are allowed. Only HTTP/HTTPS or FTP URLS are allowed. + A backup site (http://www.openadk.org/distfiles) is always used, if the package site is + not available. There is no direct support for cvs/svn/git/hg/bzr repositories, because + building OpenADK behind a HTTP proxy should be working without any configuration hassle. + There are also some predefined mirror sites in +mk/mirrors.mk+, + which can be used. + Example: PKG_SITES:= ${MASTER_SITE_GNU:=foo/} + +* +DISTFILES+ optional, may contain the name of the tarball of + the package. If +DISTFILES+ is not specified, it defaults to +PKG_NAME-PKG_VERSION.tar.gz+. + Example: DISTFILES= ${PKG_NAME}${PKG_VERSION}.tar.xz + +* +NO_DISTFILES+ optional, may be set to 1, to disable fetching of any archives. + Provide the source code for the package in +package/<pkgname>/src+, which will be + automatically copied to the WRKBUILD/WRKSRC directory. + +* +PKG_BUILDDEP+ optional, lists the build time dependencies (in terms of package + directory name, see +package/+) that are required for the current target package to + compile. These dependencies are guaranteed to be compiled and + installed before the configuration of the current package starts. + +* +PKG_DEPENDS+ optional, lists the runtime dependencies that are required to + run the software package on the target. It conatins a list of package names, + which might be different to the package directory name. See what is used + in PKG_template, to find out the package name used here. + +* +PKG_NOPARALLEL+ optional, may be set to 1, to disable parallel building of the + package via make -jn, n=4 is default, but can be changed in +Global Settings+ in the + menu based configuration. + +* +PKG_OPTS+ optional, may be set to following values: + +dev+ create a development package automatically, containing header files and +.pc+ files. + Only useful for library packages, when you want to compile on the target. + +devonly+ only creates a development package with header files, normally not needed on + the target. + +noscripts+ do not automatically install *-config and other build related scripts into + +STAGING_TARGET_DIR/scripts+, required for automake/autoconf package + +noremove+ do not automatically remove package files from +STAGING_TARGET_DIR+ + +* +PKG_NEED_CXX+ optional, package need C++ compiler + +* +PKG_CXX+ optional, package can use either `uClibc++` or `libstdc++` + +The recommended way to define these variables is to use the following +syntax: + +---------------------- +PKG_VERSION:= 2.11 +---------------------- + +Or for lines longer than 80 characters use: +---------------------- +PKG_DEPENDS:= foo bar baz +PKG_DEPENDS+= muh maeh +---------------------- + + +The variables that define what should be performed at the +different steps of the configure, build and install process. + +* +CONFIG_STYLE+ either manual, auto or minimal + +* +CONFIGURE_ARGS+ add --enable-foo/--disable-foo to configure + +* +CONFIGURE_ENV+ add additional environment variables to configure step + +* +HOST_STYLE+ either manual or auto + +* +HOST_CONFIGURE_ARGS+ add --enable-foo/--disable-foo to host configure + +* +HOST_CONFIGURE_ENV+ add additional environment variables to the host configure step + +* +AUTOTOOL_STYLE+ either autoreconf, autoconf or bootstrap + +* +BUILD_STYLE+ either manual or auto + +* +MAKE_ENV+ add additional variables to build step + +* +MAKE_FLAGS+ add additinal make flags to build step + +* +FAKE_FLAGS+ add additional make flags to fake install step + +* +XAKE_FLAGS+ add additional make flags to build and fake install step + +* +INSTALL_STYLE+ either manual or auto + +* +CONFIGURE_PROG+ overwrite default configure programm + +* +MAKE_FILE+ overwrite default Makefile + +* +ALL_TARGET+ overwrite default build target + +* +INSTALL_TARGET+ overwrite default install target + +The variables to add or overwrite preprocessor, compiler and linker flags: + +* +TARGET_CPPFLAGS+ flags for the preprocessor + +* +TARGET_CFLAGS+ flags for the compiler + +* +TARGET_LDFLAGS+ flags for the linker + +* +TARGET_CXXFLAGS+ flags for the C++ compiler + +* +CPPFLAGS_FOR_BUILD+ flags used for host preprocessing + +* +CFLAGS_FOR_BUILD+ flags used for host compiling + +* +LDFLAGS_FOR_BUILD+ flags used for host linking + + diff --git a/docs/patch-policy.txt b/docs/patch-policy.txt new file mode 100644 index 000000000..b5a585b5e --- /dev/null +++ b/docs/patch-policy.txt @@ -0,0 +1,82 @@ +// -*- mode:doc; -*- +// vim: set syntax=asciidoc: + +[[patch-policy]] + +Patching a package +------------------ + +While integrating a new package or updating an existing one, it may be +necessary to patch the source of the software to get it cross-built within +OpenADK. OpenADK offers an infrastructure to automatically handle this during +the builds. Patches are provided within OpenADK, in the package directory; +these typically aim to fix cross-compilation, libc support, or other such +issues. + +Normally the patches are autogenerated via: +------------ + $ make package=<package> update-patches +------------ + +Otherwise they are manually generated via: +------------ + $ diff -Nur <pkgname>-<pkgversion>.orig <pkgname>-<pkgversion> > package/<pkgname>/patches/xxx-description.patch +------------ + +The string +xxx+ should be substituted by a number starting with 001. The +patches will be applied in numeric order. You should either use the automatic +patch generation or the manual patch creation for a package. Mixed usage is not +supported. + +Format and licensing of the package patches +~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ + +Patches are released under the same license as the software that is +modified. + +A message explaining what the patch does, and why it is needed, should +be added in the header commentary of the patch. +At the end, the patch should look like: + +--------------- +add C++ support test + +--- configure.ac.orig ++++ configure.ac +@@ -40,2 +40,12 @@ + +AC_PROG_MAKE_SET ++ ++AC_CACHE_CHECK([whether the C++ compiler works], ++ [rw_cv_prog_cxx_works], ++ [AC_LANG_PUSH([C++]) ++ AC_LINK_IFELSE([AC_LANG_PROGRAM([], [])], ++ [rw_cv_prog_cxx_works=yes], ++ [rw_cv_prog_cxx_works=no]) ++ AC_LANG_POP([C++])]) ++ ++AM_CONDITIONAL([CXX_WORKS], [test "x$rw_cv_prog_cxx_works" = "xyes"]) +--------------- + +Integrating patches found on the Web +~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ + +When integrating a patch of which you are not the author, you have to +add a few things in the header of the patch itself. + +Depending on whether the patch has been obtained from the project +repository itself, or from somewhere on the web, add one of the +following tags: + +--------------- +Backported from: <some commit id> +--------------- + +or + +--------------- +Fetch from: <some url> +--------------- + +It is also sensible to add a few words about any changes to the patch +that may have been necessary. diff --git a/docs/prerequisite.txt b/docs/prerequisite.txt new file mode 100644 index 000000000..8a9670066 --- /dev/null +++ b/docs/prerequisite.txt @@ -0,0 +1,52 @@ +// -*- mode:doc; -*- +// vim: set syntax=asciidoc: + +[[requirement]] +System requirements +------------------- + +OpenADK is designed to run on Linux systems. But there is basic +support to run on MacOS X Maverick, Windows 7 with Cygwin, OpenBSD, +NetBSD and FreeBSD. Main development happens on Debian/GNU Linux 7 +and MacOS X Maverick. The other host platforms are occasionally +tested. + +OpenADK detects the host system and displays only the software +packages, which are known to be cross-compilable on the used host. +For example OpenJDK7 is only cross-compilable on a Linux host. + +OpenADK needs some software to be already installed on the host +system; here is the list of the mandatory packages, +package names may vary between host systems. + +* Build tools: + +** +bash+ +** +binutils+ +** +gcc+ +** `g++` +** +GNU sed+ +** +GNU awk+ +** +GNU make+ +** +patch+ +** +gzip+ +** +perl+ +** +tar+ +** +wget+ +** +findutils (find, xargs)+ +** +ncurses5 development+ +** +zlib development+ +** +libc development+ + +There is a check for the required versions of these tools in advance, +though. To re-issue the checks, use +make prereq+. + +For some packages there are some optional packages required. OpenADK +will check for the required tools in advance, when a specific package is +choosen. For example XBMC needs java installed on the host system. +OpenADK tries to avoid any optional required host tools and will try to +build them when needed. + +For some host systems you can try to use ./scripts/adkprepare.sh to +install all required software. You need to run the script as root, it +will use the package management of your host to install the software. diff --git a/docs/qemu.txt b/docs/qemu.txt new file mode 100644 index 000000000..976490bf3 --- /dev/null +++ b/docs/qemu.txt @@ -0,0 +1 @@ +user,hostfwd=tcp::2222-:22 diff --git a/docs/running-openadk.txt b/docs/running-openadk.txt new file mode 100644 index 000000000..c4ae0fa72 --- /dev/null +++ b/docs/running-openadk.txt @@ -0,0 +1,178 @@ +// -*- mode:doc; -*- +// vim: set syntax=asciidoc: + +Running OpenADK created Linux firmware +====================================== + +Bootloader +~~~~~~~~~~~ + +The Bootloader is used to initialize the machine and load the Linux kernel. +A list of popular Bootloaders can be found on http://elinux.org/Bootloader. +OpenADK provides the Bootloader if necessary for a target system. +You can find them in +make menuconfg+ under +Packages/Bootloader+. +Some Bootloaders require the Linux kernel in a special format (SREC, ELF, ..), +compressed or with a special header. This will be automatically done by +OpenADK in +target/<arch>/Makefile+ while creating the firmware archives or +images. + +Linux kernel +~~~~~~~~~~~~ + +The kernel is a program that constitutes the central core of a computer +operating system. It has complete control over everything that occurs in the +system. The Bootloader can provide some basic runtime configuration +parameters via the kernel commandline feature. + +The Linux kernel in OpenADK is intended to be very small in size and will +be by default compressed with xz compression algorithm, if available for +the target system. You can configure the compression algorithm used for the +compression of the Linux kernel and if choosen the initramfs filesystem in ++make menuconfig+. In +Kernel configuration+ you have the choice between +dfferent kernel versions. The latest version will be automatically used. +There you can choose any needed addon drivers or any supported runtime +and debugging features. + +The kernel expands itself on boot, if compressed, and then initialize the +hardware. The additional kernel modules are loaded later by a init script. +The kernel will autoamtically mount the virtual filesystem /dev as devtmpfs +and then will execute +/sbin/init+ in userspace. + +init system +~~~~~~~~~~~ + +The _init_ program is the first userspace program started by the kernel (it +carries the PID number 1), and is responsible for starting the userspace +services and programs (for example: web server, graphical applications, other +network servers, etc.). + +OpenADK uses *Busybox* init. Amongst many programs, Busybox has an +implementation of a basic +init+ program, which is sufficient for most embedded +systems. The Busybox +init+ program will read the +/etc/inittab+ file at boot +to know what to do. The syntax of this file can be found in +http://git.busybox.net/busybox/tree/examples/inittab (note that Busybox ++inittab+ syntax is special: do not use a random +inittab+ documentation from +the Internet to learn about Busybox +inittab+). The default +inittab+ in +OpenADK is generated while producing the +base-files+ package. The main job +the default inittab does is to start the +/etc/init.d/rcS+ shell script, and +start one or more +getty+ programs (which provides a login prompt). + +/dev management +~~~~~~~~~~~~~~~ + +On a Linux system, the +/dev+ directory contains special files, called +_device files_, that allow userspace applications to access the +hardware devices managed by the Linux kernel. Without these _device +files_, your userspace applications would not be able to use the +hardware devices, even if they are properly recognized by the Linux +kernel. + +OpenADK uses *dynamic device nodes using devtmpfs and mdev*. This method relies +on the _devtmpfs_ virtual filesystem in the kernel, which is enabled by default +for all OpenADK generated kernels, and adds the +mdev+ userspace utility on top +of it. +mdev+ is a program part of Busybox that the kernel will call every time +a device is added or removed. Thanks to the +/etc/mdev.conf+ configuration +file, +mdev+ can be configured to for example, set specific permissions or +ownership on a device file, call a script or application whenever a device +appears or disappear, etc. Basically, it allows _userspace_ to react on device +addition and removal events. +mdev+ is also important if you have devices that +require a firmware, as it will be responsible for pushing the firmware contents +to the kernel. +mdev+ is a lightweight implementation (with fewer features) of ++udev+. For more details about +mdev+ and the syntax of its configuration file, +see http://git.busybox.net/busybox/tree/docs/mdev.txt. + +initscripts +~~~~~~~~~~~ + +The /etc/init.d/rcS script will execute all shell scripts in /etc/init.d in +order with the parameter +autostart+. The order is identified by the +#INIT+ +comment in the script. All scripts are sourcing the +/etc/rc.conf+ file to +determine if a service should be started on boot and which flags if any are +used for the service. By default all services except syslog and ssh are +disabled. Most scripts provided by OpenADK via ++package/<pkgname>/files/<pkgname>.init+ are like: + +--------------------- +#!/bin/sh +#PKG foo +#INIT 60 + +. /etc/rc.conf + +case $1 in +autostop) ;; +autostart) + test x"${foo:-NO}" = x"NO" && exit 0 + exec sh $0 start + ;; +start) + /usr/sbin/foo $foo_flags + ;; +stop) + kill $(pgrep -f /usr/sbin/foo ) + ;; +restart) + sh $0 stop + sh $0 start + ;; +*) + echo "usage: $0 (start|stop|restart)" + exit 1 +esac +exit $? +--------------------- + +cfgfs - configuration file system +~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ + +The cfgfs application for the OpenADK system uses a special small partition on +the block device of your embedded system (f.e. flash, sd card, compact flash +or hard disk). Only changes made to /etc on your embedded system are saved in a +compressed form (using LZO1 compression algorithm) in this partition. There is +no Linux filesystem on this partition. The embedded system initialization +process will setup /etc correctly on boot up, when cfgfs application is found. +After making any changes to /etc, which should survive a reboot of the embedded +system must be written to the cfgfs partition via “cfgfs commit”. Trying to +reboot, shutdown or halt an embedded system with unsaved changes will generate +an error, which can be circumvented. Updates to /etc via the ipkg package +manager will be reported. + +--------------------- +cfgfs +Configuration Filesystem Utility (cfgfs), Version 1.09 +Syntax: + /sbin/cfgfs commit [-f] + /sbin/cfgfs erase + /sbin/cfgfs setup [-N] + /sbin/cfgfs status [-rq] + /sbin/cfgfs { dump | restore } [<filename>] +--------------------- + +network configuration +~~~~~~~~~~~~~~~~~~~~~ + +On bootup +/etc/network/interfaces+ is used to find out which network configuration +should be used. The default is to use DHCP (via busybox +udhcpc+) on the first found +ethernet device to configure the network. See network configuration for detailed syntax +of +/etc/network/interfaces+. It is similar to Debian network configuration and uses ++ifupdown+ from +busybox+. + +See Appendix xref:network-configuration[] + +getting a shell on the system +~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ + +There are two method available to get a shell on your embedded system created with +OpenADK. You can either login locally via serial console or graphical console or you +can login remotely via secure shell. + +In both cases the default user is +root+ and the default password is ++linux123+. *You should always change the default password!!* You can do this +either via +passwd+ on the system or you can preconfigure a password via +make +menuconfig+ under +Runtime configuration+. + +The default shell used in OpenADK is +mksh+ from http://www.mirbsd.org/mksh/. +You can change the shell in +make menuconfig+ under +Runtime configuration+. Be +aware of the fact that the bootup process might use some +mksh+ features to +speedup the system start. When you change the shell for system +/bin/sh+ the +slower startup is used as a fallback. diff --git a/docs/runtime-debugging.txt b/docs/runtime-debugging.txt new file mode 100644 index 000000000..5147883f9 --- /dev/null +++ b/docs/runtime-debugging.txt @@ -0,0 +1,22 @@ +// -*- mode:doc; -*- +// vim: set syntax=asciidoc: + +[[runtime-debugging]] + +Details on debugging your newly created firmware +------------------------------------------------ + +strace +~~~~~~ + +gdbserver +~~~~~~~~~ + +gdb +~~~ + +kernel module debugging +~~~~~~~~~~~~~~~~~~~~~~~ + +kernel debugging +~~~~~~~~~~~~~~~~ diff --git a/docs/starting-up.txt b/docs/starting-up.txt new file mode 100644 index 000000000..7326f60c7 --- /dev/null +++ b/docs/starting-up.txt @@ -0,0 +1,12 @@ +// -*- mode:doc; -*- +// vim: set syntax=asciidoc: + +Starting up +=========== + +include::prerequisite.txt[] + +include::getting.txt[] + +include::using.txt[] + diff --git a/docs/using-openadk-development.txt b/docs/using-openadk-development.txt new file mode 100644 index 000000000..d7d31fbad --- /dev/null +++ b/docs/using-openadk-development.txt @@ -0,0 +1,62 @@ +// -*- mode:doc; -*- +// vim: set syntax=asciidoc: + +Using OpenADK during development +~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ + +The normal operation of OpenADK is to download a tarball, extract it, +configure, compile and install the software component found inside this +tarball. The source code is extracted in ++build_<system>_<arch>_<libc>/w-<package>-<version>+, which is a +temporary directory: whenever +make clean+ or one of the other clean +targets are used, this directory is entirely removed, and recreated at +the next +make+ invocation. + +This behavior is well-suited when OpenADK is used mainly as an +integration tool, to build and integrate all the components of an +embedded Linux system. However, if one uses OpenADK during the +development of certain components of the system, this behavior is not +very convenient: one would instead like to make a small change to the +source code of one package, and be able to quickly rebuild the system +with OpenADK. + +Following workflow might help to integrate your own changes, while +developing a new package or board support. + +Make changes directly in +build_<system>_<arch>_<libc>/w-<package>-<version>+ +and recompile the package with: + +------------ + $ make package=<package> package +------------ + +When you are happy with the change, generate a patch: +------------ + $ make package=<package> update-patches +------------ + +For the linux kernel just change the code in ++build_<system>_<arch>_<libc>/linux, remove the .config +and call make again: + +------------ + $ rm build_<system>_<arch>_<libc>/linux/.config + $ make +------------ + +There is no update-patches target for the kernel, you need +to extract the kernel source from your download dir, make +a copy of the source tree, add your changes and create a +patch manually: + +------------ + $ tar xvf dl/linux-x.y.z.tar.xz + $ cp -a linux-x.y.z linux-x.y.z.orig + $ diff -Nur linux-x.y.z.orig linux-x.y.z > target/linux/patches/x.y.z/mykernel.patch + $ make cleankernel + $ make +------------ + +The same method can be used for toolchain components and _must_ +be used for busybox, because it contains patches, which are not +generated via +make update-patches+. diff --git a/docs/using-openadk-toolchain.txt b/docs/using-openadk-toolchain.txt new file mode 100644 index 000000000..1b294d4da --- /dev/null +++ b/docs/using-openadk-toolchain.txt @@ -0,0 +1,19 @@ +// -*- mode:doc; -*- +// vim: set syntax=asciidoc: + +Using the generated toolchain outside OpenADK +~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ + +You may want to compile, for your target, your own programs or other software +that are not packaged in OpenADK. In order to do this you can use the toolchain +that was generated by OpenADK. + +The toolchain generated by OpenADK is located by default in ++host_<gnu_host_name>/+. The simplest way to use it is to add ++host_<gnu_host_name>/bin/+ to your PATH environment variable and then to use ++<arch>-<vendor>-linux-<libcsuffix>-gcc+, ++<arch>-<vendor>-linux-<libcsuffix>-objdump+, etc. + +It is possible to relocate the toolchain, you just need to put ++target_<arch>_<libc>_<abi>+ into the same directory as ++host_<gnu_host_name>/+. diff --git a/docs/using.txt b/docs/using.txt new file mode 100644 index 000000000..c51914c04 --- /dev/null +++ b/docs/using.txt @@ -0,0 +1,99 @@ +// -*- mode:doc; -*- +// vim: set syntax=asciidoc: + +Using OpenADK +------------- + +OpenADK has a nice configuration tool similar to the one you can +find in the http://www.kernel.org/[Linux kernel] or in +http://www.busybox.net/[Busybox]. Note that you can *and should build +everything as a normal user*. There is no need to be root to configure +and use OpenADK. The first step is to run the configuration +assistant: + +-------------------- + $ make menuconfig +-------------------- + +For each menu entry in the configuration tool, you can find associated +help that describes the purpose of the entry. + +image::menuconfig.png[] + +First of all you need to choose your target architecture, your target +system, your target C library, your target firmware type and your target +package format. After that you can select individual packages and kernel +settings or just use one of the predefined package collections. When you +are ready exit and save. You can always redefine the configuration +using +make menuconfig+. + +image::menuconfig-configured.png[] + +Once everything is configured, the configuration tool generates a ++.config+ file that contains the description of your configuration. It +will be used by the Makefiles to do what's needed. + +Let's go: + +-------------------- + $ make +-------------------- + +You *should never* use +make -jN+ with OpenADK: it does not support 'top-level +parallel make'. Instead, use the +ADK_MAKE_JOBS+ option in +Global settings+ to +tell OpenADK to run each package compilation with +make -jN+. + +The `make` command will generally perform the following steps: + +* download source files (as required); +* configure, build and install required host tools; +* configure, build and install the cross-compiling toolchain; +* build a kernel image, if selected; +* build/install selected target packages; +* build a bootloader, if selected; +* create a root filesystem in selected format. + +OpenADK output is stored in several subdirectories: + +* +firmware/+ where all the images and packages are stored. + +* +build_<system>_<arch>_<libc>/+ where all the components except for the cross-compilation toolchain are built. The directory contains one subdirectory for each of these components. + +* +target_<arch>_<libc>/+ which contains a hierarchy similar to a root filesystem + hierarchy. This directory contains the installation of the + cross-compilation toolchain and all the userspace packages selected + for the target. However, this directory is 'not' intended to be + the root filesystem for the target: it contains a lot of development + files, unstripped binaries and libraries that make it far too big + for an embedded system. These development files are used to compile + libraries and applications for the target that depend on other + libraries. + +* +root_<system>_<arch>_<libc>/+ which contains the complete root filesystem for + the target. One exception, it doesn't have the correct + permissions (e.g. setuid for the busybox binary) for some files. + Therefore, this directory *should not be used on your target*. + Instead, you should use one of the images or archives built in the + +firmware/+ directory. If you need an + extracted image of the root filesystem for booting over NFS, then + use the tarball image generated in +firmware/+ and extract it as + root. Compared to +build_*/+, +target_*/+ contains only the files and + libraries needed to run the selected target applications: the + development files are (exception: if any dev packages are selected) + not present, the binaries are stripped. + +* +host_<gnu_host_name>/+ contains the installation of tools compiled for the host + that are needed for the proper execution of OpenADK, including the + cross-compilation toolchain. + +* +toolchain_build_<arch>_<libc>/+ contains the build directories for the various + components of the cross-compilation toolchain. + +* +pkg_<system>_<arch>_<libc>/+ contains stamp files and file lists for the various components. + +The command, +make menuconfig+ and +make+, are the +basic ones that allow to easily and quickly generate images fitting +your needs, with all the supports and applications you enabled. + +More details about the "make" command usage are given in +xref:make-tips[]. diff --git a/docs/working-with.txt b/docs/working-with.txt new file mode 100644 index 000000000..9e101d28f --- /dev/null +++ b/docs/working-with.txt @@ -0,0 +1,25 @@ +// -*- mode:doc; -*- +// vim: set syntax=asciidoc: + +Working with OpenADK +==================== + +This section explains how you can customize OpenADK to fit your +needs. + +include::configure.txt[] + +include::make-tips.txt[] + +include::customize.txt[] + +include::common-usage.txt[] + +Hacking OpenADK +--------------- + +If OpenADK does not yet fit all your requirements, you may be +interested in hacking it to add: + +* new packages: refer to the xref:adding-packages[Developer guide] + diff --git a/docs/writing-rules.txt b/docs/writing-rules.txt new file mode 100644 index 000000000..22f6547ad --- /dev/null +++ b/docs/writing-rules.txt @@ -0,0 +1,91 @@ +// -*- mode:doc; -*- +// vim: set syntax=asciidoc: + +Coding style +------------ + +Overall, these coding style rules are here to help you to add new files in +OpenADK or refactor existing ones. + +[[writing-rules-config-in]] + ++Config.in+ +~~~~~~~~~~~ + ++Config.in+ files contain entries for almost anything configurable in +OpenADK. Mostly all Config.in files for packages are autogenerated and +should not be manually edited. The following rules apply for the top level +Config.in, for the files in target/config and target/linux/config. + +An entry has the following pattern: + +--------------------- +config ADK_TARGET_FOO + bool "foo" + depends on ADK_PACKAGE_LIBBAZ + select BR2_PACKAGE_LIBBAR + help + This is a comment that explains what foo is. + + http://foo.org/foo/ +--------------------- + +* The +bool+, +depends on+, +select+ and +help+ lines are indented + with one tab. + +* The help text itself should be indented with one tab and two + spaces. + +The +Config.in+ files are the input for the configuration tool +used in OpenADK, which is the regular _Kconfig_. For further +details about the _Kconfig_ language, refer to +http://kernel.org/doc/Documentation/kbuild/kconfig-language.txt[]. + +[[writing-rules-mk]] + ++Makefile+ +~~~~~~~~~~ + +* Header: The file starts with a license header. ++ +--------------------- +# This file is part of the OpenADK project. OpenADK is copyrighted +# material, please see the LICENCE file in the top-level directory. +--------------------- ++ +* Assignment: use +=+ followed by two tabs: ++ +--------------------- +PKG_VERSION:= 1.0 +PKG_BUILDDEP+= libfoo +--------------------- ++ + +* Indentation: use tab only: ++ +--------------------- +libfoo-install: + $(CP) $(WRKINST)/usr/lib/libfoo*.so* \ + $(IDIR_LIBFOO)/usr/lib +--------------------- ++ + +* Optional dependency: + +** Prefer multi-line syntax. +--------------------- +ifeq ($(ADK_PACKAGE_LIBFOO_WITH_PYTHON),y) +CONFIGURE_ARGS+= --with-python-support +else +CONFIGURE_ARGS+= --without-python-support +endif +--------------------- + +Documentation +~~~~~~~~~~~~~ + +The documentation uses the +http://www.methods.co.nz/asciidoc/[asciidoc] format. + +For further details about the http://www.methods.co.nz/asciidoc/[asciidoc] +syntax, refer to http://www.methods.co.nz/asciidoc/userguide.html[]. |
