X-Git-Url: http://erislabs.net/gitweb/?a=blobdiff_plain;f=m4%2Ftruncf.m4;h=67f8bb6b05341890a052846e6e4a32f14774c677;hb=befc0db81ed3cfe6e72915ab9d805adb1ebe7529;hp=f917de584a0dc262ccb595754a2dceb307013a16;hpb=d60f3b0c6b0f93a601acd1cfd3923f94ca05abb0;p=gnulib.git

diff --git a/m4/truncf.m4 b/m4/truncf.m4
index f917de584..67f8bb6b0 100644
--- a/m4/truncf.m4
+++ b/m4/truncf.m4
@@ -1,4 +1,4 @@
-# truncf.m4 serial 4
+# truncf.m4 serial 6
 dnl Copyright (C) 2007, 2010-2011 Free Software Foundation, Inc.
 dnl This file is free software; the Free Software Foundation
 dnl gives unlimited permission to copy and/or distribute it,
@@ -56,10 +56,12 @@ AC_DEFUN([gl_FUNC_TRUNCF],
 #include <math.h>
 ]gl_FLOAT_MINUS_ZERO_CODE[
 ]gl_FLOAT_SIGNBIT_CODE[
-int main()
+static float dummy (float f) { return 0; }
+int main (int argc, char *argv[])
 {
+  float (*my_truncf) (float) = argc ? truncf : dummy;
   /* Test whether truncf (-0.0f) is -0.0f.  */
-  if (signbitf (minus_zerof) && !signbitf (truncf (minus_zerof)))
+  if (signbitf (minus_zerof) && !signbitf (my_truncf (minus_zerof)))
     return 1;
   return 0;
 }
@@ -79,7 +81,7 @@ int main()
     HAVE_DECL_TRUNCF=0
   fi
   if test $HAVE_DECL_TRUNCF = 0 || test $REPLACE_TRUNCF = 1; then
-    AC_LIBOBJ([truncf])
+    dnl No libraries are needed to link lib/truncf.c.
     TRUNCF_LIBM=
   fi
   AC_SUBST([TRUNCF_LIBM])