[CMake] CMAKE_<LANG>_OUTPUT_EXTENSION

[Michael Wild]

Dear all

no matter when I try to set CMAKE_{C,CXX}_OUTPUT_EXTENSION, on my Linux
box using the GNU Makefiles generator the resulting object files always
have a .o extension. I tried setting it in the cache, before and after
the project() call. Nothing helps.

Is this a known issue? I tried trawling the archives, but only found
references to IDE generators ignoring this setting.

Thanks for any help

Michael