winbuilds/std_check.diff at master · alex85k/winbuilds · GitHub

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Index: CMakeLists.txt
===================================================================
--- CMakeLists.txt	(revision 4018)
+++ CMakeLists.txt	(working copy)
@@ -183,7 +183,11 @@
 include(CheckPrototypeExists)
 include(CheckSymbolExists)

-check_prototype_exists(isnan cmath HAVE_STD_ISNAN)
+check_cxx_source_compiles(
+  "#include <cmath>
+  int main() { double x=0.1; return std::isnan(x)?1:0; }"
+  HAVE_STD_ISNAN)
+
 if(NOT HAVE_STD_ISNAN)
   if(MSVC)
     check_prototype_exists(_isnan float.h HAVE_ISNAN)
@@ -197,7 +201,10 @@
   endif()
 endif()

-check_prototype_exists(isfinite cmath HAVE_STD_ISFINITE)
+check_cxx_source_compiles(
+  "#include <cmath>
+  int main() { double x=0.1; return std::isfinite(x)?1:0; }"
+  HAVE_STD_ISFINITE)

 if(NOT HAVE_STD_ISFINITE)
   if(MSVC)