Selecting the compiler

To select the compiler, set CMAKE_C_COMPILER and CMAKE_CXX_COMPILER to a valid compiler name or full path on the command-line using cmake -D.

For example:

cmake -G "Ninja" -D CMAKE_C_COMPILER=gcc-4.2 -D CMAKE_CXX_COMPILER=g++-4.2 path/to/your/source

A preferred approach is to use a tool chain file. See cmake-toolchains.

A toolchain file sets variables such as:

• CMAKE_SYSTEM_NAME
• CMAKE_SYSTEM_PROCESSOR
• CMAKE_C_COMPILER
• CMAKE_C_COMPILER_TARGET
• CMAKE_CXX_COMPILER
• CMAKE_CXX_COMPILER_TARGET

Xcode

The followng finds the path of your C and C++ compilers:

xcrun -find cc
xcrun -find c++

These should be used for the values of CMAKE_C_COMPILER and CMAKE_CXX_COMPILER.