cmake HAVE_FEENABLEEXCEPT examples

NREL/EnergyPlus cmake/CompilerFlags.cmake :140 

check_cxx_symbol_exists(feenableexcept "fenv.h" HAVE_FEENABLEEXCEPT)

NREL/EnergyPlus cmake/CompilerFlags.cmake :141 

message(VERBOSE "HAVE_FEENABLEEXCEPT=${HAVE_FEENABLEEXCEPT}")

NREL/EnergyPlus cmake/CompilerFlags.cmake :143 

target_compile_definitions(project_fp_options INTERFACE HAVE_FEENABLEEXCEPT)