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authorEric Andersen <andersen@codepoet.org>2001-01-12 10:53:48 +0000
committerEric Andersen <andersen@codepoet.org>2001-01-12 10:53:48 +0000
commitddaf94095891a21cedd6a18d9178e4444fb937a7 (patch)
treeb47bcefa33533e4f41ecce4e3a1bee1d215e006e /libc/sysdeps/linux
parent77879554671206102471bb282accb3251395d151 (diff)
Patch from James Graves <jgraves@deltamobile.com> to better handle m68k.
Also fixes 2 very important malloc bugs! Anyone using malloc (esp mmu-less) should update and recompile. -Erik
Diffstat (limited to 'libc/sysdeps/linux')
-rw-r--r--libc/sysdeps/linux/m68k/README.m68k64
1 files changed, 64 insertions, 0 deletions
diff --git a/libc/sysdeps/linux/m68k/README.m68k b/libc/sysdeps/linux/m68k/README.m68k
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index 000000000..697413852
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+++ b/libc/sysdeps/linux/m68k/README.m68k
@@ -0,0 +1,64 @@
+
+README for uC-libc on the m68k[nommu] architecture
+
+James Graves <jgraves@deltamobile.com>
+
+For now (2001/1/9) support for the m68k should be considered "alpha"
+quality at best. It mostly works OK for some of the stuff I'm working
+on, but you can't fully compile other things (like the user
+applications for uClinux). Needs lots more testing.
+
+Only developed/tested with m68k-pic-coff-gcc 2.7.2.3-pic-060999, from
+Lineo.
+
+Configuration:
+
+ Read and edit the Config file, carefully.
+
+ TARGET_ARCH=m68k
+ CROSS = m68k-pic-coff-
+ CC = $(CROSS)gcc
+ STRIPTOOL = $(CROSS)strip
+ KERNEL_SOURCE=/opt/uClinux/linux
+ HAS_MMU = false
+ HAS_FLOATS = false
+ MALLOC = malloc-simple
+ INSTALL_DIR = /opt/uClinux/m68k-pic-coff
+
+ The regular malloc library is broken, dunno why. Use
+ simple-malloc.
+
+Installation:
+ Theoretically, you should be able to install right over the
+ existing uC-libc 0.9.1 files in
+ /opt/uClinux/m68k-pic-coff/include, but I recommend cleaning
+ out all the include files there.
+
+ The only file in there that's not from the old uC-libc is
+ assert.h, but I don't know why that would be the valid copy.
+
+ run:
+ make install
+
+Usage:
+ Any program you compile should have this added to CFLAGS:
+
+ -D__VFORK_MACRO__ -Dconst= -D__const=
+
+ (You need the equal sign so that const and __const are defined
+ as NULL instead of as '1') The 'const' keyword is broken for
+ m68k-pic-coff-gcc 2.7.2.3-pic-060999. There _was_ a fix
+ floating around, but apparently it didn't work.
+
+Problems:
+
+ I _may_ be able to help if you run into problems. Create a
+ really, really short program that demonstrates the problem,
+ and contact me.
+
+TODO:
+ Fix vfork().
+
+ Does crt0.o still need to be a separate file? Can't I just
+ stick it in libc.a and be done with it? Is that specified in
+ the GCC link options?