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From 7ccfea413216bddd988823acf4e93421ea0f7f9f Mon Sep 17 00:00:00 2001
From: Khem Raj <raj.khem@gmail.com>
Date: Tue, 16 Aug 2022 18:35:45 -0700
Subject: [PATCH] specify void prototype for functions with no parameters
Compilers defaulting to C99 flag such functions as warning which fails
to compile when using -Werror
Fixes
error: a function declaration without a prototype is deprecated in all versions of C [-Werror,-Wstrict-prototypes]
Upstream-Status: Submitted [https://lists.gnu.org/archive/html/autoconf-patches/2022-08/msg00003.html]
Signed-off-by: Khem Raj <raj.khem@gmail.com>
---
lib/autoconf/c.m4 | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
--- a/lib/autoconf/c.m4
+++ b/lib/autoconf/c.m4
@@ -127,7 +127,7 @@ m4_if([$2], [main], ,
[/* Override any GCC internal prototype to avoid an error.
Use char because int might match the return type of a GCC
builtin and then its argument prototype would still apply. */
-char $2 ();])], [return $2 ();])])
+char $2 (void);])], [return $2 ();])])
# AC_LANG_FUNC_LINK_TRY(C)(FUNCTION)
@@ -151,7 +151,7 @@ m4_define([AC_LANG_FUNC_LINK_TRY(C)],
#define $1 innocuous_$1
/* System header to define __stub macros and hopefully few prototypes,
- which can conflict with char $1 (); below. */
+ which can conflict with char $1 (void); below. */
#include <limits.h>
#undef $1
@@ -162,7 +162,7 @@ m4_define([AC_LANG_FUNC_LINK_TRY(C)],
#ifdef __cplusplus
extern "C"
#endif
-char $1 ();
+char $1 (void);
/* The GNU C library defines this for functions which it implements
to always fail with ENOSYS. Some functions are actually named
something starting with __ and the normal name is an alias. */
@@ -252,7 +252,7 @@ dnl other built-in extern "C" functions,
dnl when it actually happens.
[AC_LANG_PROGRAM([[$1
namespace conftest {
- extern "C" int $2 ();
+ extern "C" int $2 (void);
}]],
[[return conftest::$2 ();]])])
@@ -2457,7 +2457,7 @@ using std::strcmp;
namespace {
-void test_exception_syntax()
+void test_exception_syntax(void)
{
try {
throw "test";
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