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]
---
lib/autoconf/c.m4 | 10 +++++-----
1 file changed, 5 insertions(+), 5 deletions(-)
diff --git a/lib/autoconf/c.m4 b/lib/autoconf/c.m4
index abbb83fe..c6202789 100644
--- a/lib/autoconf/c.m4
+++ b/lib/autoconf/c.m4
@@ -133,7 +133,7 @@ m4_if([$2], [main], ,
#ifdef __cplusplus
extern "C"
#endif
-char $2 ();])], [return $2 ();])])
+char $2 (void);])], [return $2 ();])])
# AC_LANG_FUNC_LINK_TRY(C)(FUNCTION)
@@ -157,7 +157,7 @@ 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
@@ -168,7 +168,7 @@ 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. */
@@ -258,7 +258,7 @@ dnl other built-in extern "C" functions, but let's worry
about that
dnl when it actually happens.
[AC_LANG_PROGRAM([[$1
namespace conftest {
- extern "C" int $2 ();
+ extern "C" int $2 (void);
}]],
[[return conftest::$2 ();]])])
@@ -2474,7 +2474,7 @@ using std::strcmp;
namespace {
-void test_exception_syntax()
+void test_exception_syntax(void)
{
try {
throw "test";
--
2.37.2
