[CMake] How to dictate cmake best CFLAGS/...

[Christoph Cullmann]

Hi,

we have a strict set of C/CXX/LDFLAGS we want to pass the toolchain per 
default, how can that be accomplished best with cmake? Before, we just used 
nmake with handcrafted files using some environment variables.

I tried to call cmake on windows like:

"\"$WINPREFIX\\bin\\cmake\" \
    -DCMAKE_ROOT_WIN:PATH=\"$CMAKE_ROOT_WIN\" \
    -DCMAKE_INSTALL_PREFIX:PATH=\"$CMAKE_INSTALL_PREFIX_WIN\" \
    -DCMAKE_C_FLAGS:STRING=\"$CMAKE_C_FLAGS_WIN\" \
    -DCMAKE_CXX_FLAGS:STRING=\"$CMAKE_CXX_FLAGS_WIN\" \
    -DCMAKE_C_LINK_FLAGS:STRING=\"$CMAKE_C_LINK_FLAGS_WIN\" \
    -DCMAKE_CXX_LINK_FLAGS:STRING=\"$CMAKE_CXX_LINK_FLAGS_WIN\" \
    -G \"$CMAKE_GENERATOR_WIN\""

(with the vars being our stuff), but unlike on linux, where this allows me to 
overwrite the standard flags, on windows still for a later normal nmake run 
the default "Debug" flags are used.

Any good way to accomplish this task in a sane way without too much hassle?
The important stuff I must overwrite is the used compiler (only on linux, that 
works nice with C_COMPILER + CXX_COMPILER) and the flags for compilers + 
linker.

cu
Christoph

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