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I want to prefix the compiler with a utility script, so instead of for example g++-4.7 main.cpp,kinst-ompp g++-4.7 main.cpp is invoked.

I tried doing this in the CMakeLists.txt, but I'm getting a "not found" error:

set(CMAKE_CXX_COMPILER "${OMPP_CXX} ${CMAKE_CXX_COMPILER}")
set(CMAKE_C_COMPILER "${OMPP_CC} ${CMAKE_C_COMPILER}")

How do I properly configure this using CMake?

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  • If you're using the Makefile generator, Try running VERBOSE=1 make after running cmake. That way, you can see exactly which commands get invoked by make - maybe it helps debugging the issue. Commented Apr 9, 2013 at 16:57

2 Answers 2

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You should avoid setting the compiler in this way - see cmake: problems specifying the compiler (2) and this CMake FAQ entry for more info.

I think the following should work (after deleting your CMakeCache.txt):

export CC="kinst-ompp gcc-4.7" CXX="kinst-ompp g++-4.7" cmake <Path to CMakeLists.txt>
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This leads to the error "could not find compiler set in environment variable CC"...
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I got this to work by setting my compiler to the prefix and then passing the real compiler name as first argument. Ugly, I know.

set(CMAKE_CXX_COMPILER "${OMPP_CXX}")
set(CMAKE_CXX_FLAGS_RELEASE "${CMAKE_CXX_COMPILER} ${commonCXXFlags} ${commonReleaseFlags}")
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This works only if some CMAKE script is not prefixing CMAKE_CXX_FLAGS_RELEASE by something (e.g. preprocessor define.) If this happens you will get undecipherable errors during compilation. Fraser's answer below worked for me.

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