Help/variable/CMAKE_LANG_FLAGS_INIT.rst
.. versionadded:: 3.7
Value used to initialize the :variable:CMAKE_<LANG>_FLAGS cache entry
the first time a build tree is configured for language <LANG>.
This variable is meant to be set by a :variable:toolchain file <CMAKE_TOOLCHAIN_FILE>. CMake may prepend or append content to
the value based on the environment and target platform. For example,
the contents of a xxxFLAGS environment variable will be prepended,
where xxx will be language-specific but not necessarily the same as
<LANG> (e.g. :envvar:CXXFLAGS for CXX, :envvar:FFLAGS for
Fortran, and so on).
This value is a command-line string fragment. Therefore, multiple options
should be separated by spaces, and options with spaces should be quoted.
See also the configuration-specific
:variable:CMAKE_<LANG>_FLAGS_<CONFIG>_INIT variable.