I have a proprietary library (>150,000 lines) of quantum mechanics C++ code that relies on OpenMP for parallisation. This code used to compile fine with Xcode 4.6 and its' real GCC compiler, but the LLVM compiler that ships with Xcode 5 doesn't seem to support OpenMP. My code is developed on a Mac but needs to be portable to non-Apple hardware such as massively parallel supercomputers, so re-writing the code is not an option. Does anyone know of a suitable compiler that can be used? Many thanks for any help.
I come back from my comment as I tested hpc.sourceforge.net and it is working like a charm for me.
Simply untar the archive as explained:
sudo tar -xvf gcc-4.8-bin.tar -C /
Update your .profile to use by default the hpc compiled version of gcc if you want.
Compile your program with option -fopenmp then link it with option -lgomp.
"Does anyone know of a suitable compiler that can be used?"
The Intel compilers on MacOS support OpenMP, as they do on other platforms. http://software.intel.com/en-us/intel-software-development-products-for-mac-os-x
Of course, they cost money, but they may be worth it.
(Full disclosure: I work for Intel on the OpenMP runtime used by the compiler)
See Clang + OpenMP Setup in Xcode . The steps are basically:
brew install llvm
. CC
and value of /usr/local/opt/llvm/bin/clang
. /usr/local/opt/llvm/lib
to “Library Search Paths”. /usr/local/opt/llvm/lib/clang/7.0.1/include
to “Header Search Paths”. (The version number may vary based upon your installation.) -fopenmp
compilation flag to “Other C Flags”. /usr/local/opt/llvm/lib/libiomp5.dylib
to “Build Phases” » “Link Binary with Libraries”.
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