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SOFTWARE REQUIREMENTS
Compiling uClibc requires Linux kernel header files. uClibc will
be compiled to match the interfaces available in the provided
version of the Linux kernel headers. Linux kernel version 2.0,
version 2.2, version 2.4 and version 2.6 are known to work. Other
kernel versions may work but haven't been tested. Its also helpful
to have a working version of GNU binutils, and GNU gcc -- using
excessively old versions of these packages can cause very strange
errors that are difficult to find and fix.
CONFIGURING uClibc:
- Users must have a valid configuration file to compile uClibc. Do not
skip this step. New configuration options are added in each
release, and odd configuration options are sometimes removed.
To configure uClibc, you can run:
make menuconfig
or
make config
If you have an existing .config file, you can update this file
using the
make oldconfig
command, which will only ask you about new configuration options.
Available configuration commands are:
"make config" Text based configuration, no menus or colors.
"make menuconfig" Text based color menus, radiolists & dialogs.
"make oldconfig" Default all questions based on the contents of
your existing ./.config file.
"make defconfig" Use defaults for all options.
"make randconfig" Use random values for all options.
"make allyesconfig" Set all values to "yes" for all options.
"make allnoconfig" Set all values to "no" for all options.
COMPILING uClibc:
- uClibc does not have proper dependancy checking (yet) so if you
change your uClibc configuration, you must current rebuild the
entire library, by first running
make clean
- Once you have a valid configuration file, just run
make
to compile uClibc. or if you are cross compiling, you would
instead run something like:
make CROSS=arm-linux-
INSTALLING the uClibc development environment:
- As root, if necessary, run something like:
make PREFIX=<some path> install
This will install the uClibc runtime and development system (i.e.
all the header files, libraries, etc) into the directories defined
within your .config file.
USING uClibc:
- To compile programs with uClibc you will need a complete toolchain
(i.e. binutils, gcc, and uClibc) that was built expressly for use
with uClibc.
- Native and cross compiling toolchains, as well as makefiles for creating
uClibc toolchains, are available from the uClibc website. You may want
to check out "buildroot", which is available from the uClibc download area,
which provides examples of how to build your own uClibc based system.
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