diff options
Diffstat (limited to 'configure.ac')
-rw-r--r-- | configure.ac | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/configure.ac b/configure.ac index 99915cce..7ac7377b 100644 --- a/configure.ac +++ b/configure.ac @@ -187,6 +187,23 @@ AC_COMPILE_IFELSE([ AC_MSG_RESULT(no)) CFLAGS="$old_CFLAGS" +AC_MSG_CHECKING(for NaN support) +AC_RUN_IFELSE([ + AC_LANG_PROGRAM( + [[ + #include <math.h> + ]], + [[ + double x = NAN; return !isnan(x); + ]] + )], + [AC_MSG_RESULT(yes)], + [ + AC_MSG_RESULT(no) + AC_MSG_WARN([Compiler does not respect NaN, some functionality might break; consider using '-fno-finite-math-only']) + ], + [AC_MSG_RESULT(skipped)]) + # ---------------------------------------------------------------------- |