-From 5593f23e8e062da108ed585535e7281b87346ee1 Mon Sep 17 00:00:00 2001
-From: Sergei Trofimovich <slyfox@gentoo.org>
-Date: Wed, 25 Nov 2020 09:36:25 +0000
-Subject: [PATCH] build/apr_common.m4: avoid explicit inclusion of
- '"confdefs.h"'
-
-The failure is observed on `autoconf-2.69d` (soon to be released
-as `autoconf-2.70`). There `int64_t` detection fails as:
-
-```
-$ autoreconf && ./configure
-...
-checking whether int64_t and int use fmt %d... no
-checking whether int64_t and long use fmt %ld... no
-checking whether int64_t and long long use fmt %lld... no
-configure: error: could not determine the string function for int64_t
-```
-
-This happens because `./configure` always stumbles on warning:
-
-```
-configure:3350: gcc -c -g -O2 -Werror conftest.c >&5
-In file included from conftest.c:31:
-confdefs.h:22: error: "__STDC_WANT_IEC_60559_ATTRIBS_EXT__" redefined [-Werror]
- 22 | #define __STDC_WANT_IEC_60559_ATTRIBS_EXT__ 1
- |
-```
-
-It's triggered by double inclusion of `"confdefs.h"` contents:
-explicitly in `APR_TRY_COMPILE_NO_WARNING` macro and implicitly
-via `AC_LANG_SOURCE` use.
-
-To fix it and avoid having to define `main()` declaration the change
-uses `AC_LANG_PROGRAM` instead.
-
-Tested on both `autoconf-2.69` and `autoconf-2.69d`.
-
-Bug: https://bugs.gentoo.org/738156
-Bug: https://bugs.gentoo.org/750353
-Signed-off-by: Sergei Trofimovich <slyfox@gentoo.org>
----
- build/apr_common.m4 | 8 ++------
- 1 file changed, 2 insertions(+), 6 deletions(-)
-
-diff --git a/build/apr_common.m4 b/build/apr_common.m4
-index f4e2dfd0a7..6f5782e674 100644
---- a/build/apr_common.m4
-+++ b/build/apr_common.m4
-@@ -504,13 +504,9 @@ AC_DEFUN([APR_TRY_COMPILE_NO_WARNING],
- CFLAGS="$CFLAGS -Werror"
- fi
- AC_COMPILE_IFELSE(
-- [AC_LANG_SOURCE(
-- [#include "confdefs.h"
-- ]
-- [[$1]]
-- [int main(int argc, const char *const *argv) {]
-+ [AC_LANG_PROGRAM(
-+ [[$1]],
- [[$2]]
-- [ return 0; }]
- )], [CFLAGS=$apr_save_CFLAGS
- $3], [CFLAGS=$apr_save_CFLAGS
- $4])