llvm dev - Jan 2011 - [LLVMdev] LLVM-GCC builds on OS X 10.5, fails on 10.6

Hi,

For months now I've been building LLVM-GCC on a Mac OS X laptop without
problems. Recently I switched to a different laptop, and I can no longer build
LLVM-GCC. (LLVM itself builds fine on both platforms.) The build commands
I'm using are identical, and I always start from a clean unpack of the
version 2.8 tarball. However, the old laptop ran OS X 10.5 while the new one
runs OS X 10.6. (There are other differences, but that is the most significant.)

I'm not sure how to debug the issue because the GCC compiler error is not
only cryptic, it's one of the longest I've ever seen. I'm also
seeing prior errors such as:

  libLLVMBitReader.a, file was built for unsupported file format which is not
the architecture being linked (i386)

I'm using "--with-arch=nocona", which I believe is correct for all
OS X 10.6 hardware.

Any tips on how to fix this? A link to the complete build log is below. Thanks,

Trevor

http://vocaro.com/trevor/files/llvm-gcc-build-failure.txt

It looks like you're building a 32-bit llvm-gcc and trying to link it
against 64-bit llvm libraries. Try specifying the triple as
x86_64-apple-darwin10 instead of i686-apple-darwin9.

-Jim


On Jan 27, 2011, at 7:29 AM, Trevor Harmon wrote:
> Hi,
> 
> For months now I've been building LLVM-GCC on a Mac OS X laptop without
problems. Recently I switched to a different laptop, and I can no longer build
LLVM-GCC. (LLVM itself builds fine on both platforms.) The build commands
I'm using are identical, and I always start from a clean unpack of the
version 2.8 tarball. However, the old laptop ran OS X 10.5 while the new one
runs OS X 10.6. (There are other differences, but that is the most significant.)
> 
> I'm not sure how to debug the issue because the GCC compiler error is
not only cryptic, it's one of the longest I've ever seen. I'm also
seeing prior errors such as:
> 
>  libLLVMBitReader.a, file was built for unsupported file format which is
not the architecture being linked (i386)
> 
> I'm using "--with-arch=nocona", which I believe is correct
for all OS X 10.6 hardware.
> 
> Any tips on how to fix this? A link to the complete build log is below.
Thanks,
> 
> Trevor
> 
> http://vocaro.com/trevor/files/llvm-gcc-build-failure.txt
> 
> 
> _______________________________________________
> LLVM Developers mailing list
> LLVMdev at cs.uiuc.edu         http://llvm.cs.uiuc.edu
> http://lists.cs.uiuc.edu/mailman/listinfo/llvmdev

On Jan 27, 2011, at 1:42 PM, Jim Grosbach wrote:
> It looks like you're building a 32-bit llvm-gcc and trying to link it
against 64-bit llvm libraries. Try specifying the triple as
x86_64-apple-darwin10 instead of i686-apple-darwin9.
Yep, that was it... thanks!

It looks like I can generalize the TRIPLE setting to:

  export TRIPLE=$MACHTYPE

and it will pick up either x86_64-apple-darwin10 or i686-apple-darwin9 as
appropriate.

Trevor