I’m a bit confused, as ever ☺.
I’ve got a number of windows compilers, cl and gcc for instance, and I want to
specify which one I want to use.
I can do this using an environment variable thus,
% env CXX=gcc cmake –G’NMake Makefiles’ .
which allows CMakeDetermineCXXCompiler.cmake to override the ‘cl’ default that
the NMake generator sets.
However, I’d like to control this from within a CMake file, and this doesn’t
appear possible. From what I can see, CMakeDetermineCXXCompiler is loaded and
executed prior to the CMakeLists.txt file, which means that I cannot set the
compiler internally. Is this true, or is there something I’m not aware of?
What I’d like to do is something like:
CMakeLists.txt:
IF(... some condition ...)
SET(ENV{CXX} “gcc”)
ELSE
SET(ENV{CXX} “cl”)
ENDIF(... some condition ...)
... NORMAL BUILD RULES ...
Should this be possible? If not, I’ll have to wrap the contents of the
CMakeLists file with a IF(INNERLOOP) and then call CMake –DINNERLOOP=1 from
within the CMakeLists.txt file, after setting the environment variable, which
is a bit gnarly.
Joe
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