Eric Blake wrote:
> > ++++ b/lib/isnan.c
> > +@@ -67,6 +67,8 @@
> > + ((sizeof (DOUBLE) + sizeof (unsigned int) - 1) / sizeof (unsigned int))
> > + typedef union { DOUBLE value; unsigned int word[NWORDS]; } memory_double;
> > +
> > ++int FUNC (DOUBLE x);
>
> Why are there no header files declaring rpl_isnan? Isn't a better fix to
> patch math.in.h to declare everything that we will be providing?
math.in.h does declare everything that it provides. But math.in.h is not
always present when isnan[fdl].c is compiled.
This should silence gcc and address your question.
2009-10-27 Bruno Haible <br...@clisp.org>
* lib/isnan.c (rpl_isnan[fdl]): Repeat the specification declaration.
Reported by Jim Meyering.
--- lib/isnan.c.orig 2009-10-28 01:22:06.000000000 +0100
+++ lib/isnan.c 2009-10-28 01:20:17.000000000 +0100
@@ -1,5 +1,5 @@
/* Test for NaN that does not need libm.
- Copyright (C) 2007-2008 Free Software Foundation, Inc.
+ Copyright (C) 2007-2009 Free Software Foundation, Inc.
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
@@ -18,6 +18,18 @@
#include <config.h>
+/* Specification. */
+#ifdef USE_LONG_DOUBLE
+/* Specification found in math.h or isnanl-nolibm.h. */
+extern int rpl_isnanl (long double x);
+#elif ! defined USE_FLOAT
+/* Specification found in math.h or isnand-nolibm.h. */
+extern int rpl_isnand (double x);
+#else /* defined USE_FLOAT */
+/* Specification found in math.h or isnanf-nolibm.h. */
+extern int rpl_isnanf (float x);
+#endif
+
#include <float.h>
#include <string.h>
