I'm not sure where it was, but CMake prefers gcc over cc, and cxx over g++. You can force it by setting CC=clang.
On 2012-03-10, at 09:27:28 , Pere Mato Vila wrote: > In my Mac system (10.7.4) with Xcode (4.4.1) CMake finds by default the GNU > compiler for C and Clang for C++. This posses problems later when building my > package. The package can be built correctly either with Clang or with GCC > but not in a mixed mode. See the cmake output: > > -- The C compiler identification is GNU 4.2.1 > -- The CXX compiler identification is Clang 4.0.0 > -- Checking whether C compiler has -isysroot > -- Checking whether C compiler has -isysroot - yes > -- Checking whether C compiler supports OSX deployment target flag > -- Checking whether C compiler supports OSX deployment target flag - yes > -- Check for working C compiler: /Developer/usr/bin/gcc > -- Check for working C compiler: /Developer/usr/bin/gcc -- works > -- Detecting C compiler ABI info > -- Detecting C compiler ABI info - done > -- Check for working CXX compiler: /usr/bin/c++ > -- Check for working CXX compiler: /usr/bin/c++ -- works > -- Detecting CXX compiler ABI info > -- Detecting CXX compiler ABI info - done > > > The question is how this is possible? What is the logic to detect the > compiler used by CMake? I know that I can force a given compiler with the > CMAKE_XXX_COMPILER or by defining the environment variables CXX and CC but it > would be nice that the proper selection is done without any user > intervention. > > % which cc c++ > /usr/bin/cc > /usr/bin/c++ > > % ls -ls /usr/bin/cc > 8 lrwxr-xr-x 1 root wheel 5 Aug 22 09:09 /usr/bin/cc -> clang > % ls -ls /usr/bin/c++ > 8 lrwxr-xr-x 1 root wheel 7 Aug 22 09:09 /usr/bin/c++ -> clang++ > > ------------------------------------------------------------- > Pere Mato CERN, PH Department, CH 1211 Geneva 23, Switzerland > e-mail: pere.m...@cern.ch tel: +41 22 76 78696 > fax: +41 22 76 68792 gsm: +41 76 48 70855 > > > -- > > Powered by www.kitware.com > > Visit other Kitware open-source projects at > http://www.kitware.com/opensource/opensource.html > > Please keep messages on-topic and check the CMake FAQ at: > http://www.cmake.org/Wiki/CMake_FAQ > > Follow this link to subscribe/unsubscribe: > http://www.cmake.org/mailman/listinfo/cmake -- Powered by www.kitware.com Visit other Kitware open-source projects at http://www.kitware.com/opensource/opensource.html Please keep messages on-topic and check the CMake FAQ at: http://www.cmake.org/Wiki/CMake_FAQ Follow this link to subscribe/unsubscribe: http://www.cmake.org/mailman/listinfo/cmake
