kmpkg_cmake_get_vars
Runs a cmake configure with a dummy project to extract certain cmake variables
Usage
kmpkg_cmake_get_vars(<out-var>)
kmpkg_cmake_get_vars(<out-var>) sets <out-var> to
a path to a generated CMake file, with the detected CMAKE_* variables
re-exported as KMPKG_DETECTED_CMAKE_*.
Additionally sets, for RELEASE and DEBUG:
KMPKG_COMBINED_CXX_FLAGS_<config>KMPKG_COMBINED_C_FLAGS_<config>KMPKG_COMBINED_SHARED_LINKER_FLAGS_<config>KMPKG_COMBINED_STATIC_LINKER_FLAGS_<config>KMPKG_COMBINED_EXE_LINKER_FLAGS_<config>
Most users should use these pre-combined flags instead of attempting
to read the KMPKG_DETECTED_* flags directly.
Notes
Avoid usage in portfiles.
All calls to kmpkg_cmake_get_vars will result in the same output file;
the output file is not generated multiple times.
Basic Usage
kmpkg_cmake_get_vars(cmake_vars_file)
include("${cmake_vars_file}")
message(STATUS "detected CXX flags: ${KMPKG_DETECTED_CMAKE_CXX_FLAGS}")