cmake HAVE_ISFINITE examples

Froser/gamemachine src/3rdparty/openal-soft-1.19.1/CMakeLists.txt :599 

CHECK_SYMBOL_EXISTS(isfinite math.h HAVE_ISFINITE)

gridlab-d/gridlab-d cmake/CheckDependencies.cmake :136 

FILE(WRITE ${CMAKE_CURRENT_BINARY_DIR}/HAVE_ISFINITE.cc "
#include <math.h>
int main() {
    int result = isfinite(1.0);
}")

gridlab-d/gridlab-d cmake/CheckDependencies.cmake :153 

TRY_COMPILE(HAVE_ISFINITE ${CMAKE_CURRENT_BINARY_DIR} ${CMAKE_CURRENT_BINARY_DIR}/HAVE_ISFINITE.cc)

GenericMappingTools/gmt cmake/modules/ConfigureChecks.cmake :366 

check_symbol_exists (isfinite    "${_math_h}" HAVE_ISFINITE)