cmake

How to Get CMake to Use Default Compiler on System PATH?

Currently, I invoke CMake from my build directory as follows:

CXX="/opt/gcc-4.8/bin/g++" cmake ..

to get CMake to use this particular compiler. Otherwise it uses the operating system default compiler.

My PATH has "/opt/gcc-4.8/bin" in front of everything else. So, instead of prepending the environmental variable is there way to specify in the "`CMakeLists.txt" file to use the default g++ on the path?

Solution

  • CMake honors the setting of the PATH environment variable, but gives preference to the generic compiler names cc and c++. To determine which C compiler will be used by default under UNIX by CMake, run:

    $ which cc

    To determine the default C++ compiler, run:

    $ which c++

    If you generate a symbolic link c++ in /opt/gcc-4.8/bin which points to /opt/gcc-4.8/bin/g++, CMake should use GCC 4.8 by default.