Origin: 0a763c5e50
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`.
Github: closes#25
Submitted by: Sergei Trofimovich <slyfox gentoo.org>
Reviewed by: ylavic
git-svn-id: https://svn.apache.org/repos/asf/apr/apr/trunk@1887279 13f79535-47bb-0310-9956-ffa450edef68
Gbp-Pq: Name build-apr_common.m4-avoid-explicit-inclusion-of-conf.patch
844777a15f