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https://gitlab.xiph.org/xiph/opusfile/-/merge_requests/42
https://bugs.gentoo.org/879707
From 9c7915c120c399a6a001c2a34e9040c9c5c9d340 Mon Sep 17 00:00:00 2001
From: Sam James <sam@gentoo.org>
Date: Tue, 22 Nov 2022 02:59:20 +0000
Subject: [PATCH] m4: fix -Wstrict-protoypes
In preparation for C23. Fixes the following error if Clang 16 is
cranked up to be stricter:
```
-warning: a function declaration without a prototype is deprecated in all versions of C [-Wstrict-prototypes]
+error: a function declaration without a prototype is deprecated in all versions of C [-Werror,-Wstrict-prototypes]
```
Bug: https://bugs.gentoo.org/879701
Signed-off-by: Sam James <sam@gentoo.org>
--- a/m4/attributes.m4
+++ b/m4/attributes.m4
@@ -39,7 +39,7 @@ AC_DEFUN([CC_CHECK_CFLAGS_SILENT], [
AC_CACHE_VAL(AS_TR_SH([cc_cv_cflags_$1]),
[ac_save_CFLAGS="$CFLAGS"
CFLAGS="$CFLAGS $1"
- AC_LINK_IFELSE([AC_LANG_SOURCE([int main() { return 0; }])],
+ AC_LINK_IFELSE([AC_LANG_SOURCE([int main(void) { return 0; }])],
[eval "AS_TR_SH([cc_cv_cflags_$1])='yes'"],
[eval "AS_TR_SH([cc_cv_cflags_$1])='no'"])
CFLAGS="$ac_save_CFLAGS"
@@ -89,7 +89,7 @@ AC_DEFUN([CC_CHECK_LDFLAGS], [
AS_TR_SH([cc_cv_ldflags_$1]),
[ac_save_LDFLAGS="$LDFLAGS"
LDFLAGS="$LDFLAGS $1"
- AC_LINK_IFELSE([AC_LANG_SOURCE([int main() { return 1; }])],
+ AC_LINK_IFELSE([AC_LANG_SOURCE([int main(void) { return 1; }])],
[eval "AS_TR_SH([cc_cv_ldflags_$1])='yes'"],
[eval "AS_TR_SH([cc_cv_ldflags_$1])="])
LDFLAGS="$ac_save_LDFLAGS"
@@ -165,16 +165,16 @@ AC_DEFUN([CC_CHECK_ATTRIBUTE], [
AC_DEFUN([CC_ATTRIBUTE_CONSTRUCTOR], [
CC_CHECK_ATTRIBUTE(
[constructor],,
- [extern void foo();
- void __attribute__((constructor)) ctor() { foo(); }],
+ [extern void foo(void);
+ void __attribute__((constructor)) ctor(void) { foo(); }],
[$1], [$2])
])
AC_DEFUN([CC_ATTRIBUTE_DESTRUCTOR], [
CC_CHECK_ATTRIBUTE(
[destructor],,
- [extern void foo();
- void __attribute__((destructor)) dtor() { foo(); }],
+ [extern void foo(void);
+ void __attribute__((destructor)) dtor(void) { foo(); }],
[$1], [$2])
])
@@ -195,7 +195,7 @@ AC_DEFUN([CC_ATTRIBUTE_FORMAT_ARG], [
AC_DEFUN([CC_ATTRIBUTE_VISIBILITY], [
CC_CHECK_ATTRIBUTE(
[visibility_$1], [visibility("$1")],
- [void __attribute__((visibility("$1"))) $1_function() { }],
+ [void __attribute__((visibility("$1"))) $1_function(void) { }],
[$2], [$3])
])
@@ -306,7 +306,7 @@ AC_DEFUN([CC_ATTRIBUTE_ALIGNED], [
CFLAGS="$CFLAGS $cc_cv_werror"
for cc_attribute_align_try in 64 32 16 8 4 2; do
AC_COMPILE_IFELSE([AC_LANG_SOURCE([
- int main() {
+ int main(void) {
static char c __attribute__ ((aligned($cc_attribute_align_try))) = 0;
return c;
}])], [cc_cv_attribute_aligned=$cc_attribute_align_try; break])
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