diff options
Diffstat (limited to 'configure.in')
| -rw-r--r-- | configure.in | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/configure.in b/configure.in index df4e0014bc..6cb013aa1f 100644 --- a/configure.in +++ b/configure.in @@ -839,6 +839,20 @@ if test "$GCC:${warnflags+set}:no" = yes::no; then fi RUBY_TRY_CFLAGS(-Qunused-arguments, [RUBY_APPEND_OPTIONS(rb_cv_wsuppress_flags, -Qunused-arguments)]) +for n in infinity nan; do + m=AS_TR_CPP($n) + AC_CACHE_CHECK([whether $m is available without C99 option], rb_cv_$n, + [AC_COMPILE_IFELSE( + [AC_LANG_BOOL_COMPILE_TRY(AC_INCLUDES_DEFAULT([@%:@include <math.h> +@%:@ifndef $m +@%:@error no $m +@%:@endif +]), [1])], [eval rb_cv_$n=yes], [eval rb_cv_$n=no])]) + if eval test '"$rb_cv_'$n'"' = yes; then + AC_DEFINE_UNQUOTED([HAVE_]$m) + fi +done + if test "$GCC" = yes; then # NaCl's glibc build generates undefined references to __memset_chk. # TODO(sbc): Remove this once NaCl's glibc is fixed. |