[LLVMdev] Replacing llvm-gcc in Xcode 3.1.1 with svn version

[Dan Villiom Podlaski Christiansen]

Hi,

The procedure you describe is quite complicated and invasive, in my
opinion. It might be useful someday to be able to use the compiler
binaries supplied by Apple; you never know...

I'm not at my Mac right now, but you should be able to achieve the
same results through two small steps: first, create a small shell
script that adds the directory containing libLTO to DYLD_LIBRARY_PATH.
Then, edit the project rules in Xcode to invoke this script instead of
the default LLVM GCC. The first step works quite well for me, but as I
don't use Xcode that often, I'm not sure I tried the second. As an
alternative, you should be able to edit your Xcode configuration to
default to the new path.

If you're interested, I can post the shell script I use.

On 10/21/08, Tatu Vaajalahti <tatuvaaj at mac.com> wrote:
> Hello all,
>
> I have replaced the llvm-gcc shipped with the Xcode by the latest
> version and I was wondering if I have missed something... (everything
> *seems* to work).
> Here's what I did:
>
> 0. Checkout LLVM (and clang) + llvm-gcc
>
> 1. Build LLVM (with clang) and install into /Developer/usr/local :
>      # mkdir llvmobj
>      # cd llvmobj
>      # CC=gcc-4.2 CXX=g++-4.2 ../llvm/configure --prefix=/Developer/
> usr/local --enable-optimized
>      # make -j2
>      # make install
>      # cp -p ../llvm/tools/clang/utils/* /Developer/usr/local/bin/
>
> 2. Build llvm-gcc
>      # cd llvm-gcc
>      # make clean
>      # rm -rf build
>      # mkdir -p build/obj build/dst build/sym
>      # (NOTE: I don't want PowerPC code)
>      # gnumake install RC_OS=macos RC_ARCHS="i386" TARGETS="i386
> x86_64" SRCROOT=`pwd` OBJROOT=`pwd`/build/obj DSTROOT=`pwd`/build/dst
> SYMROOT=`pwd`/build/sym
>
> 3. Replace old llvm-gcc with new one
>      # rm -rf /Developer/usr/llvm-gcc-4.2
>      # ditto build/dst /
>
> ------ rest only once -------
>
> 4. Fix libLTOs
>      # rm  /Developer/usr/lib/libLTO.dylib
>      # ln -sf /Developer/usr/local/lib/libLTO.dylib /Developer/usr/lib/
> libLTO.dylib
>      # rm /usr/lib/libLTO.dylib
>      # ln -sf /Developer/usr/local/lib/libLTO.dylib /usr/lib/
> libLTO.dylib
>
> 5. Fix /Developer/SDKs/MacOSX10.5.sdk/Developer/usr
>      # cd /Developer/SDKs/MacOSX10.5.sdk/Developer/usr
>      # mv llvm-gcc-4.2 llvm-gcc-4.2.old
>      # ln -sf /Developer/usr/llvm-gcc-4.2 llvm-gcc-4.2
>
>
> TIA!
>
> ---
> Tatu Vaajalahti
> Tampere, Finland
>
>
>
>
>
>
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-- 
Dan Villiom Podlaski Christiansen, stud.scient.
danchr at daimi.au.dk, danchr at gmail.com