Ensure wctob is declared on IRIX 6.5.

[gnulib.git] / m4 / wctob.m4

diff --git a/m4/wctob.m4 b/m4/wctob.m4
index f511b51..b9b8387 100644 (file)
--- a/m4/wctob.m4
+++ b/m4/wctob.m4
@@ -1,4 +1,4 @@
-# wctob.m4 serial 1
+# wctob.m4 serial 2
 dnl Copyright (C) 2008 Free Software Foundation, Inc.
 dnl This file is free software; the Free Software Foundation
 dnl gives unlimited permission to copy and/or distribute it,
@@ -10,10 +10,26 @@ AC_DEFUN([gl_FUNC_WCTOB],
 
   AC_CHECK_FUNCS_ONCE([wctob])
   if test $ac_cv_func_wctob = no; then
-    HAVE_WCTOB=0
+    HAVE_DECL_WCTOB=0
     gl_REPLACE_WCHAR_H
     AC_LIBOBJ([wctob])
     gl_PREREQ_WCTOB
+  else
+    dnl IRIX 6.5 has the wctob() function but does not declare it.
+    AC_CHECK_DECLS([wctob], [], [], [
+/* Tru64 with Desktop Toolkit C has a bug: <stdio.h> must be included before
+   <wchar.h>.
+   BSD/OS 4.0.1 has a bug: <stddef.h>, <stdio.h> and <time.h> must be included
+   before <wchar.h>.  */
+#include <stddef.h>
+#include <stdio.h>
+#include <time.h>
+#include <wchar.h>
+])
+    if test $ac_cv_have_decl_wctob != yes; then
+      HAVE_DECL_WCTOB=0
+      gl_REPLACE_WCHAR_H
+    fi
   fi
 ])