doc: Mention vasprintf-posix module.

[gnulib.git] / m4 / floorf.m4

diff --git a/m4/floorf.m4 b/m4/floorf.m4
index 8cdaa94..96c9b3b 100644 (file)
--- a/m4/floorf.m4
+++ b/m4/floorf.m4
@@ -1,5 +1,5 @@
-# floorf.m4 serial 3
-dnl Copyright (C) 2007 Free Software Foundation, Inc.
+# floorf.m4 serial 7
+dnl Copyright (C) 2007, 2009-2010 Free Software Foundation, Inc.
 dnl This file is free software; the Free Software Foundation
 dnl gives unlimited permission to copy and/or distribute it,
 dnl with or without modifications, as long as this notice is preserved.
@@ -20,13 +20,12 @@ AC_DEFUN([gl_FUNC_FLOORF],
       REPLACE_FLOORF=1
     fi
   else
-    REPLACE_FLOORF=1
+    HAVE_DECL_FLOORF=0
   fi
-  if test $REPLACE_FLOORF = 1; then
+  if test $HAVE_DECL_FLOORF = 0 || test $REPLACE_FLOORF = 1; then
     AC_LIBOBJ([floorf])
     FLOORF_LIBM=
   fi
-  AC_SUBST([REPLACE_FLOORF])
   AC_SUBST([FLOORF_LIBM])
 ])
 
@@ -34,26 +33,28 @@ AC_DEFUN([gl_FUNC_FLOORF],
 # Sets FLOORF_LIBM.
 AC_DEFUN([gl_FUNC_FLOORF_LIBS],
 [
-  AC_CACHE_VAL([gl_cv_func_floorf_libm], [
+  gl_CACHE_VAL_SILENT([gl_cv_func_floorf_libm], [
     gl_cv_func_floorf_libm=?
-    AC_TRY_LINK([
-       #ifndef __NO_MATH_INLINES
-       # define __NO_MATH_INLINES 1 /* for glibc */
-       #endif
-       #include <math.h>
-       float x;],
-      [x = floorf(x);],
+    AC_LINK_IFELSE(
+      [AC_LANG_PROGRAM(
+         [[#ifndef __NO_MATH_INLINES
+           # define __NO_MATH_INLINES 1 /* for glibc */
+           #endif
+           #include <math.h>
+           float x;]],
+         [[x = floorf(x);]])],
       [gl_cv_func_floorf_libm=])
     if test "$gl_cv_func_floorf_libm" = "?"; then
       save_LIBS="$LIBS"
       LIBS="$LIBS -lm"
-      AC_TRY_LINK([
-         #ifndef __NO_MATH_INLINES
-         # define __NO_MATH_INLINES 1 /* for glibc */
-         #endif
-         #include <math.h>
-         float x;],
-        [x = floorf(x);],
+      AC_LINK_IFELSE(
+        [AC_LANG_PROGRAM(
+           [[#ifndef __NO_MATH_INLINES
+             # define __NO_MATH_INLINES 1 /* for glibc */
+             #endif
+             #include <math.h>
+             float x;]],
+           [[x = floorf(x);]])],
         [gl_cv_func_floorf_libm="-lm"])
       LIBS="$save_LIBS"
     fi