strtoumax: Avoid link error on OSF/1 with DTK cc.

[gnulib.git] / m4 / floor.m4

diff --git a/m4/floor.m4 b/m4/floor.m4
index 5683107..5de0da2 100644 (file)
--- a/m4/floor.m4
+++ b/m4/floor.m4
@@ -1,4 +1,4 @@
-# floor.m4 serial 5
+# floor.m4 serial 7
 dnl Copyright (C) 2007, 2009-2011 Free Software Foundation, Inc.
 dnl This file is free software; the Free Software Foundation
 dnl gives unlimited permission to copy and/or distribute it,
@@ -28,10 +28,12 @@ AC_DEFUN([gl_FUNC_FLOOR],
 #include <math.h>
 ]gl_DOUBLE_MINUS_ZERO_CODE[
 ]gl_DOUBLE_SIGNBIT_CODE[
-int main()
+static double dummy (double f) { return 0; }
+int main (int argc, char *argv[])
 {
+  double (*my_floor) (double) = argc ? floor : dummy;
   /* Test whether floor (-0.0) is -0.0.  */
-  if (signbitd (minus_zerod) && !signbitd (floor (minus_zerod)))
+  if (signbitd (minus_zerod) && !signbitd (my_floor (minus_zerod)))
     return 1;
   return 0;
 }
@@ -48,7 +50,7 @@ int main()
     fi
   ])
   if test $REPLACE_FLOOR = 1; then
-    AC_LIBOBJ([floor])
+    dnl No libraries are needed to link lib/floor.c.
     FLOOR_LIBM=
   fi
   AC_SUBST([FLOOR_LIBM])