OpenMP (Mac)

[gbudny]

Hi

I tried to compile this game on a Mac, but I noticed the issue with the OpenMP.

Why do I need to install a compiler with the OpenMP on the Mac?

cmake -DCMAKE_BUILD_TYPE=Release .. -- Try OpenMP C flag = [ ] -- Performing Test OpenMP_FLAG_DETECTED -- Performing Test OpenMP_FLAG_DETECTED - Failed -- Try OpenMP C flag = [-fopenmp] -- Performing Test OpenMP_FLAG_DETECTED -- Performing Test OpenMP_FLAG_DETECTED - Failed -- Try OpenMP C flag = [-fopenmp=libomp] -- Performing Test OpenMP_FLAG_DETECTED -- Performing Test OpenMP_FLAG_DETECTED - Failed -- Try OpenMP C flag = [/openmp] -- Performing Test OpenMP_FLAG_DETECTED -- Performing Test OpenMP_FLAG_DETECTED - Failed -- Try OpenMP C flag = [-Qopenmp] -- Performing Test OpenMP_FLAG_DETECTED -- Performing Test OpenMP_FLAG_DETECTED - Failed -- Try OpenMP C flag = [-openmp] -- Performing Test OpenMP_FLAG_DETECTED -- Performing Test OpenMP_FLAG_DETECTED - Failed -- Try OpenMP C flag = [-xopenmp] -- Performing Test OpenMP_FLAG_DETECTED -- Performing Test OpenMP_FLAG_DETECTED - Failed -- Try OpenMP C flag = [+Oopenmp] -- Performing Test OpenMP_FLAG_DETECTED -- Performing Test OpenMP_FLAG_DETECTED - Failed -- Try OpenMP C flag = [-qsmp] -- Performing Test OpenMP_FLAG_DETECTED -- Performing Test OpenMP_FLAG_DETECTED - Failed -- Try OpenMP C flag = [-mp] -- Performing Test OpenMP_FLAG_DETECTED -- Performing Test OpenMP_FLAG_DETECTED - Failed -- Try OpenMP CXX flag = [ ] -- Performing Test OpenMP_FLAG_DETECTED -- Performing Test OpenMP_FLAG_DETECTED - Failed -- Try OpenMP CXX flag = [-fopenmp] -- Performing Test OpenMP_FLAG_DETECTED -- Performing Test OpenMP_FLAG_DETECTED - Failed -- Try OpenMP CXX flag = [-fopenmp=libomp] -- Performing Test OpenMP_FLAG_DETECTED -- Performing Test OpenMP_FLAG_DETECTED - Failed -- Try OpenMP CXX flag = [/openmp] -- Performing Test OpenMP_FLAG_DETECTED -- Performing Test OpenMP_FLAG_DETECTED - Failed -- Try OpenMP CXX flag = [-Qopenmp] -- Performing Test OpenMP_FLAG_DETECTED -- Performing Test OpenMP_FLAG_DETECTED - Failed -- Try OpenMP CXX flag = [-openmp] -- Performing Test OpenMP_FLAG_DETECTED -- Performing Test OpenMP_FLAG_DETECTED - Failed -- Try OpenMP CXX flag = [-xopenmp] -- Performing Test OpenMP_FLAG_DETECTED -- Performing Test OpenMP_FLAG_DETECTED - Failed -- Try OpenMP CXX flag = [+Oopenmp] -- Performing Test OpenMP_FLAG_DETECTED -- Performing Test OpenMP_FLAG_DETECTED - Failed -- Try OpenMP CXX flag = [-qsmp] -- Performing Test OpenMP_FLAG_DETECTED -- Performing Test OpenMP_FLAG_DETECTED - Failed -- Try OpenMP CXX flag = [-mp] -- Performing Test OpenMP_FLAG_DETECTED -- Performing Test OpenMP_FLAG_DETECTED - Failed CMake Error at /usr/local/Cellar/cmake/3.5.2/share/cmake/Modules/FindPackageHandleStandardArgs.cmake:148 (message): Could NOT find OpenMP (missing: OpenMP_C_FLAGS OpenMP_CXX_FLAGS) Call Stack (most recent call first): /usr/local/Cellar/cmake/3.5.2/share/cmake/Modules/FindPackageHandleStandardArgs.cmake:388 (_FPHSA_FAILURE_MESSAGE) /usr/local/Cellar/cmake/3.5.2/share/cmake/Modules/FindOpenMP.cmake:234 (find_package_handle_standard_args) CMakeLists.txt:35 (FIND_PACKAGE)

-- Configuring incomplete, errors occurred! See also "/Users/gbudny/Desktop/downloads/REGoth-master/build/CMakeFiles/CMakeOutput.log". See also "/Users/gbudny/Desktop/downloads/REGoth-master/build/CMakeFiles/CMakeError.log".

[ataulien]

What compiler are you using then? I have no experience with macs whatsoever, sorry.

You'll need a pretty up-to-date compiler anyways, which supports C++11. I doubt that the compiler is going to handle that if OpenMP isn't even supported, but I could very well be wrong about that one.

Anyways, you can just remove the OpenMP-stuff from the CMakeLists.txt and try again. Maybe it works?

[ataulien]

Seems like Apple really disabled OpenMP. As I said, just remove the flags and if the compiler is new enough it should work.

You are the first to compile it on a mac, though.

[gbudny]

I use clang on Mac. This game is not available for Mac, and it will be great if someone can create this version.

I found the solution, and it works:

"OpenMP and MPI are two entirely different things.

OMP requires compiler support, which on OS X you'll need via Homebrew. (you can also install MPI via Homebrew too, which is nice).

brew install clang-omp After you've installed clang-omp, you can then tell CMake to use that compiler by invoking it like so.

CC=clang-omp CXX=clang-omp++ cmake "

http://stackoverflow.com/questions/34216589/cmake-does-not-work-with-openmp-on-maverick

[abelsromero]

This fix does not seem to work now. Many places end up pointing, but I haven't been able to make it work: https://stackoverflow.com/questions/38971394/brew-install-clang-omp-not-working

any help?