[PATCH] config: Sync pkg.m4 from GCC

[Pietro Monteiro <pietro@sociotechnical.xyz>]

Sorry I missed this patch had been reviwed:
https://inbox.sourceware.org/gcc-patches/20250530213858.59471-1-pietro@sociotechnical.xyz/t/

I regenerated all autoconf files after applying the patch and there's no
changes.

pietro
-- >8 --
Sync the following commit from GCC:

commit 6382527abc778ecbfedb8a85ddcc502cd97ddee9
Author: Pietro Monteiro <pietro@sociotechnical.xyz>
Date:   Thu Oct 22 18:48:54 2026 -0400

    config: Update obsolete macro in pkg.m4

    The autoconf macro PKG_CHECK_MODULES defined in config/pkg.m4 uses the
    obsolete AC_TRY_LINK[1]. Update the code to use AC_LINK_IFELSE as
    documented by autoconf

    There's no difference to the generated files.

    [1] https://www.gnu.org/software/autoconf/manual/autoconf-2.69/html_node/Obsolete-Macros.html#index-AC_005fTRY_005fLINK-2207

    config/ChangeLog:

            * pkg.m4 (PKG_CHECK_MODULES): Replace AC_TRY_LINK with AC_LINK_IFELSE.
Signed-off-by: Pietro Monteiro <pietro@sociotechnical.xyz>
---
 config/pkg.m4 | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/config/pkg.m4 b/config/pkg.m4
index 7ebf517cd6a..cc15588a05c 100644
--- a/config/pkg.m4
+++ b/config/pkg.m4
@@ -151,7 +151,7 @@ dnl Check whether $pkg_cv_[]$1[]_LIBS works.
 if test $pkg_failed = no; then
   pkg_save_LDFLAGS="$LDFLAGS"
   LDFLAGS="$LDFLAGS $pkg_cv_[]$1[]_LIBS"
-  AC_TRY_LINK([],[], [], [pkg_failed=yes])
+  AC_LINK_IFELSE([AC_LANG_PROGRAM([[]], [[]])],[],[pkg_failed=yes])
   LDFLAGS=$pkg_save_LDFLAGS
 fi
 
-- 
2.54.0