From 211a6642e2a27c7933496304dee7eeb50d62065c Mon Sep 17 00:00:00 2001
From: Jim Meyering <jim@meyering.net>
Date: Sun, 21 Jan 2001 10:15:53 +0000
Subject: (jm_ICONV): Also check whether the iconv declaration has const.

---
 m4/iconv.m4 | 23 ++++++++++++++++++++++-
 1 file changed, 22 insertions(+), 1 deletion(-)

(limited to 'm4')

diff --git a/m4/iconv.m4 b/m4/iconv.m4
index 7320bef37..ee8cf2995 100644
--- a/m4/iconv.m4
+++ b/m4/iconv.m4
@@ -1,4 +1,4 @@
-#serial 1
+#serial 2
 
 dnl From Bruno Haible.
 
@@ -30,6 +30,27 @@ AC_DEFUN(jm_ICONV,
   ])
   if test "$jm_cv_func_iconv" = yes; then
     AC_DEFINE(HAVE_ICONV, 1, [Define if you have the iconv() function.])
+    AC_MSG_CHECKING([for iconv declaration])
+    AC_CACHE_VAL(jm_cv_proto_iconv, [
+      AC_TRY_COMPILE([
+#include <stdlib.h>
+#include <iconv.h>
+extern
+#ifdef __cplusplus
+"C"
+#endif
+#if defined(__STDC__) || defined(__cplusplus)
+size_t iconv (iconv_t cd, char * *inbuf, size_t *inbytesleft, char * *outbuf, size_t* outbytesleft);
+#else
+size_t iconv();
+#endif
+], [], jm_cv_proto_iconv_arg1="", jm_cv_proto_iconv_arg1="const")
+      jm_cv_proto_iconv="extern size_t iconv (iconv_t cd, $jm_cv_proto_iconv_arg1 char * *inbuf, size_t *inbytesleft, char * *outbuf, size_t* outbytesleft);"])
+    jm_cv_proto_iconv=`echo "[$]jm_cv_proto_iconv" | tr -s ' ' | sed -e 's/( /(/'`
+    AC_MSG_RESULT([$]{ac_t:-
+         }[$]jm_cv_proto_iconv)
+    AC_DEFINE_UNQUOTED(ICONV_CONST, $jm_cv_proto_iconv_arg1,
+      [Define as const if the declaration of iconv() needs const.])
   fi
   LIBICONV=
   if test "$jm_cv_lib_iconv" = yes; then
-- 
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