CMAKE_<LANG>_FLAGSΒΆ
Flags for all build types.
<LANG> flags used regardless of the value of CMAKE_BUILD_TYPE.
For each language, if this variable is not defined, it is initialized and stored in the cache using values from environment variables in combination with CMake's builtin defaults for the toolchain:
CMAKE_C_FLAGS: Initialized by theCFLAGSenvironment variable.CMAKE_CXX_FLAGS: Initialized by theCXXFLAGSenvironment variable.CMAKE_CUDA_FLAGS: Initialized by theCUDAFLAGSenvironment variable.CMAKE_Fortran_FLAGS: Initialized by theFFLAGSenvironment variable.CMAKE_CSharp_FLAGS: Initialized by theCSFLAGSenvironment variable.CMAKE_HIP_FLAGS: Initialized by theHIPFLAGSenvironment variable.CMAKE_ISPC_FLAGS: Initialized by theISPCFLAGSenvironment variable.
This value is a command-line string fragment. Therefore, multiple options should be separated by spaces, and options with spaces should be quoted.
The flags in this variable will be passed to the compiler before those
in the per-configuration CMAKE_<LANG>_FLAGS_<CONFIG> variant,
and before flags added by the add_compile_options() or
target_compile_options() commands.