Adjust strtod detection to catch glibc 2.7 bug.

[gnulib.git] / m4 / roundf.m4

diff --git a/m4/roundf.m4 b/m4/roundf.m4
index 10dbfea..650311e 100644 (file)
--- a/m4/roundf.m4
+++ b/m4/roundf.m4
@@ -19,7 +19,15 @@ AC_DEFUN([gl_FUNC_ROUNDF],
     AC_CHECK_DECLS([ceilf, floorf], , , [#include <math.h>])
     if test "$ac_cv_have_decl_floorf" = yes \
        && test "$ac_cv_have_decl_ceilf" = yes; then
-      gl_CHECK_MATH_LIB([ROUNDF_LIBM], [x = floorf (x) + ceilf (x);])
+      gl_FUNC_FLOORF_LIBS
+      gl_FUNC_CEILF_LIBS
+      if test "$FLOORF_LIBM" != '?' && test "$CEILF_LIBM" != '?'; then
+        AC_DEFINE([HAVE_FLOORF_AND_CEILF], 1,
+          [Define if the both the floorf() and ceilf() functions exist.])
+        ROUNDF_LIBM="$FLOORF_LIBM $CEILF_LIBM"
+      else
+        ROUNDF_LIBM=
+      fi
     else
       ROUNDF_LIBM=
     fi