Succes using crosstool on Mac OS X

[Martin Schaffner <schaffner at gmx dot li>]

Hello,

I managed to build a working crossgcc toolchain targeting  
powerpc-750-linux-gnu on Mac OS X 10.3.2, by running demo-ppc750.sh of  
Dan Kegel's crosstool 0.27 (http://kegel.com/crosstool/) (Thanks, Dan,  
and feel free to add my linux patch to crosstool!).

First I used fink to install cvs, rsync, libtool14, fileutils, gawk,  
sed, and wget.

Then I saw that linux requires a patch to compile, because "expr" on  
Mac OS X is not GNU expr:
http://in3www.epfl.ch/~schaffne/fix-expr-2.4.ptch

Finally, when crosstool wants to install the glibc headers, it  
unfortunately tries to compile glibc with the platform's native  
toolchain. Glibc's configure script does "as --version", which is not  
understood by Apple's assembler, which then waits for a file to compile  
on standard input, which stalls everything.

I solved that problem by first creating a cross-compiler called  
"/tools/bin/powerpc-750-linux-gnu-gcc", and changing crosstool.sh like  
this: Where ${GLIBC_DIR}/configure is invoked, I removed CC=gcc, and  
appended --with-binutils=/tools/bin.

To create the first cross-compiler, I more or less followed chapter 5  
of the book "linux from scratch", up to the section "Installing  
GCC-3.3.1 Pass 1". I appended the target directive to the binutils  
configure invocation, and to compile gcc, I first applied (to  
gcc-3.3.2):
http://vserver.13thfloor.at/Stuff/Cross/gcc-3.3.2-cross-powerpc- 
fix.diff.bz2
Configuration: ../gcc-3.3.2/configure --target=powerpc-750-linux-gnu  
--disable-nls --enable-languages=c --disable-threads --disable-shared  
--disable-checking --prefix=/tools  
--with-local-prefix=/tools/powerpc-750-linux-gnu

I actually continued following the book up to "Locking in Glibc", but  
this didn't gave me a functional shared compiler (was missing crt1.o,  
/lib/libc.5.so, or main), and this is probably not necessary to get  
crosstool to work.

Martin


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