[cctbxbb] Enabling OpenMP for phaser on OS X

[William G. Scott]

On Sep 17, 2012, at 4:32 AM, Luc Bourhis <luc_j_bourhis at mac.com> wrote:

> Hi,
> 
>> I found if I created a symbolic link from a g++4.7 compiler to /usr/bin/g++, I could "trick" phaser into compiling with OpenMP enabled.
>> 
>> This is kind of an ugly hack.  How do I force it to use /sw/bin/g++-4 ?  Is there some place in the source code for cctbx (or phaser) that I can make such a change?
> 
> May I ask on which platform you work? 

OS X, 10.8.1, most recent dev tools.  gcc-4.7 installed via fink:

% /usr/bin/gcc --version |head -n 1 
i686-apple-darwin11-llvm-gcc-4.2 (GCC) 4.2.1 (Based on Apple Inc. build 5658) (LLVM build 2336.11.00)

% /usr/bin/cc --version |head -n 1 
Apple clang version 4.0 (tags/Apple/clang-421.0.60) (based on LLVM 3.1svn)

% /sw/bin/gcc-4 --version |head -n 1 
gcc-4 (GCC) 4.7.1


> 
> In any case, the orthodox way to do that would be to pass --compiler=gcc-4.7 to libtbx/configure.py but one would need to modify libtbx/SConscript to support that version. I suggest searching for the string "darwin_gcc-4.2" in that file to see how it has been done for --compiler=gcc-4.2. This SConscript is already an utter mess but well…

OK, I'll dig into it.  I didn't know where to begin.

Thanks.

Bill


> 
> Best wishes,
> 
> Luc
> 
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