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-rw-r--r--configure.ac8
1 files changed, 4 insertions, 4 deletions
diff --git a/configure.ac b/configure.ac
index a5edd13c..76e45bc0 100644
--- a/configure.ac
+++ b/configure.ac
@@ -204,11 +204,11 @@ AC_MSG_CHECKING([for C99 math functions])
AC_LINK_IFELSE([AC_LANG_PROGRAM(
[#include <math.h>],
[int q;
- return (int)(hypot(3.0, 4.0) + atanh(0.8) + cbrt(8.0) +
- remquo(100.0, 90.0, &q) +
+ return (int)(hypot(3.0, 4.0) + log1p(2.0) + asinh(10.0) +
+ atanh(0.8) + cbrt(8.0) + remquo(100.0, 90.0, &q) +
remainder(100.0, 90.0) + copysign(1.0, -0.0) +
- log1p(0.1) + asinh(0.1)) +
- isnan(0.0);])],
+ round(3.5)) +
+ (int)(lround(-3.5)) + isnan(0.0);])],
[AC_MSG_RESULT([yes]);C99_MATH="-DHAVE_C99_MATH=1"],
[AC_MSG_RESULT([no]);C99_MATH="-DHAVE_C99_MATH=0"])
CFLAGS="$save_CFLAGS $C99_MATH"