[LLVMdev] Can't compile Apple's version on Linux

[Andrew Udvare]

Filed a bug with Apple 10073924  but I'm wondering if anyone else
knows what to fix here:

Summary:
Building a Darwin cross compiler so I can use distcc with my Mac.
Host: x86_64-gnu-linux with GCC 4.5.3.
Steps to Reproduce:
Download tar ball
tar xvf llvmgcc42-2335.15.tar.gz
mkdir gcc-build
cd gcc-build
CFLAGS="-w -m32" CXXFLAGS="$CFLAGS" CPPFLAGS="$CFLAGS" LDFLAGS="-m32"
../llvmgcc42-2335.15/configure --target=x86_64-apple-darwin11
--with-sysroot=/home/tatsh/usr/x86_64-apple-darwin11
--prefix=/home/tatsh/usr/x86_64-apple-darwin11
--enable-languages=objc,c++,obj-c++
make

Note: Had to comment out an incompatible declaration of mempcpy to get this far.

c-typeck.o: In function `store_init_value':
c-typeck.c:(.text+0x950d): undefined reference to `TheTreeToLLVM'
c-typeck.c:(.text+0x951c): undefined reference to
`reset_type_and_initializer_llvm'
collect2: ld returned 1 exit status
make[2]: *** [cc1-dummy] Error 1
make[2]: Leaving directory `/home/tatsh/dev/apple-darwin/llvm-build/gcc'
make[1]: *** [all-gcc] Error 2
make[1]: Leaving directory `/home/tatsh/dev/apple-darwin/llvm-build'
make: *** [all] Error 2

http://opensource.apple.com/source/llvmgcc42/llvmgcc42-2335.15/gcc/c-typeck.c
In the file, there's also this line and comment:
extern void * TheTreeToLLVM;        /* llvm-internal.h is not
available here.  Ugh.  */

I had a little bit of trouble getting cctools to work on Linux (and
it's still patchy/hacky but works). After that, I have distcc working
on my Mac to ask my more modern system to compile working fine with
everything except Objective-C/C++ (I'm not entirely sure why yet, it's
not error 110 and there is no error number). I'd like to continue by
adding llvm-gcc which is actually what I build with in Xcode (GCC is
what I use in Gentoo prefix; Macports also uses GCC).

Thanks