cmake HAVE_UNSETENV examples

tpoechtrager/wclang CMakeLists.txt :24 

check_function_exists (unsetenv HAVE_UNSETENV)

SWI-Prolog/swipl-devel cmake/Config.cmake :204 

check_function_exists(unsetenv HAVE_UNSETENV)

glKarin/com.n0n3m4.diii4a Q3E/src/main/jni/deplibs/mpg123/ports/cmake/src/CMakeLists.txt :52 

check_function_exists(unsetenv HAVE_UNSETENV)