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Autotools: Update ax_check_compile_flag.m4 to serial 11 (#19127)

Browse Source 
```sh
wget -O build/ax_check_compile_flag.m4 \
  https://cgit.git.savannah.gnu.org/cgit/autoconf-archive.git/plain/m4/ax_check_compile_flag.m4
```

New version of AX_CHECK_COMPILE_FLAG macro now adds the -Werror flag
automatically, if GNU-compatible compiler is detected.
This commit is contained in:
Peter Kokot
2025-08-09 02:03:37 +02:00
committed by GitHub
parent 7bf79ab666
commit f64c6248b5
7 changed files with 25 additions and 26 deletions
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14
build/ax_check_compile_flag.m4
View File

@@ -34,14 +34,24 @@
# and this notice are preserved. This file is offered as-is, without any
# warranty.
#serial 7
#serial 11
AC_DEFUN([AX_CHECK_COMPILE_FLAG],
[AC_PREREQ(2.64)dnl for _AC_LANG_PREFIX and AS_VAR_IF
AS_VAR_PUSHDEF([CACHEVAR],[ax_cv_check_[]_AC_LANG_ABBREV[]flags_$4_$1])dnl
AC_CACHE_CHECK([whether the _AC_LANG compiler accepts $1], CACHEVAR, [
ax_check_save_flags=$[]_AC_LANG_PREFIX[]FLAGS
_AC_LANG_PREFIX[]FLAGS="$[]_AC_LANG_PREFIX[]FLAGS $4 $1"
if test x"m4_case(_AC_LANG,
[C], [$GCC],
[C++], [$GXX],
[Fortran], [$GFC],
[Fortran 77], [$G77],
[Objective C], [$GOBJC],
[Objective C++], [$GOBJCXX],
[no])" = xyes ; then
add_gnu_werror="-Werror"
fi
_AC_LANG_PREFIX[]FLAGS="$[]_AC_LANG_PREFIX[]FLAGS $4 $1 $add_gnu_werror"
AC_COMPILE_IFELSE([m4_default([$5],[AC_LANG_PROGRAM()])],
[AS_VAR_SET(CACHEVAR,[yes])],
[AS_VAR_SET(CACHEVAR,[no])])