[CMake] CMAKE_<LANG>_COMPILER_ID

[Zaak Beekman]

It seems hard to find documentation for this variable. Is it set by
enable_language(<LANG>)? Can I call enable_language(<LANG>) BEFORE I call
project()?

Does anyone know a good way to provide default, compiler specific values
for CMAKE_<LANG>_FLAGS in the cache? It seems that calling set() with the
CACHE option won't do anything if the variable is already set, and that
perhaps CMAKE_<LANG>_FLAGS and CMAKE_<LANG>_COMPILER_ID are both set by
project() and/or enable_language().

Do I need to define my own variable with a default value after
CMAKE_<LANG>_COMPILER_ID is created (so that the default value is specific
to the compiler) and then concatenate/append CMAKE_<LANG>_FLAGS with its
value?

Any and all help much appreciated,
Izaak Beekman
===================================
(301)244-9367
Princeton University Doctoral Candidate
Mechanical and Aerospace Engineering
ibeekman at princeton.edu

UMD-CP Visiting Graduate Student
Aerospace Engineering
ibeekman at umiacs.umd.edu
ibeekman at umd.edu
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