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- 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?
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