cmake HAVE_DECL_ISINF examples

Kitware/VTK ThirdParty/netcdf/vtknetcdf/CMakeLists.txt :193 

check_symbol_exists("isinf" "math.h" HAVE_DECL_ISINF)

Geocld/PeaSyo third-party/json-c/CMakeLists.txt :161 

check_symbol_exists(isinf       "math.h" HAVE_DECL_ISINF)

ByConity/ByConity contrib/jsonc-cmake/CMakeLists.txt :171 

check_symbol_exists(isinf       "math.h" HAVE_DECL_ISINF)