X-Git-Url: http://erislabs.net/gitweb/?a=blobdiff_plain;f=m4%2Ftruncl.m4;h=c594236afbd504a6810723c7cf336bcd22bcc590;hb=fb733077fcd97a36e1ffdb292387943df8e1b9b4;hp=36dd64829c8355c87f8e5231df04d6ca8e1c0281;hpb=d60f3b0c6b0f93a601acd1cfd3923f94ca05abb0;p=gnulib.git

diff --git a/m4/truncl.m4 b/m4/truncl.m4
index 36dd64829..c594236af 100644
--- a/m4/truncl.m4
+++ b/m4/truncl.m4
@@ -1,4 +1,4 @@
-# truncl.m4 serial 6
+# truncl.m4 serial 8
 dnl Copyright (C) 2007-2008, 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,
@@ -84,10 +84,12 @@ int main()
 #include <math.h>
 ]gl_LONG_DOUBLE_MINUS_ZERO_CODE[
 ]gl_LONG_DOUBLE_SIGNBIT_CODE[
-int main()
+static long double dummy (long double f) { return 0; }
+int main (int argc, char *argv[])
 {
+  long double (*my_truncl) (long double) = argc ? truncl : dummy;
   /* Test whether truncl (-0.3L) is -0.0L.  */
-  if (signbitl (minus_zerol) && !signbitl (truncl (-0.3L)))
+  if (signbitl (minus_zerol) && !signbitl (my_truncl (-0.3L)))
     return 1;
   return 0;
 }
@@ -107,7 +109,7 @@ int main()
     HAVE_DECL_TRUNCL=0
   fi
   if test $HAVE_DECL_TRUNCL = 0 || test $REPLACE_TRUNCL = 1; then
-    AC_LIBOBJ([truncl])
+    dnl No libraries are needed to link lib/truncl.c.
     TRUNCL_LIBM=
   fi
   AC_SUBST([TRUNCL_LIBM])