SDL_image: acinclude/tar.m4: update from automake mainstream.

From c8c05a7647f07b9f6b4dac601905cb6c43fb38b8 Mon Sep 17 00:00:00 2001
From: Ozkan Sezer <[EMAIL REDACTED]>
Date: Sun, 5 Jul 2026 01:33:45 +0300
Subject: [PATCH] acinclude/tar.m4: update from automake mainstream.

---
 acinclude/tar.m4 | 6 +++---
 configure        | 6 +++---
 2 files changed, 6 insertions(+), 6 deletions(-)

diff --git a/acinclude/tar.m4 b/acinclude/tar.m4
index 99e3a8948..edd334c2c 100644
--- a/acinclude/tar.m4
+++ b/acinclude/tar.m4
@@ -1,6 +1,6 @@
 # Check how to create a tarball.                            -*- Autoconf -*-
 
-# Copyright (C) 2004-2020 Free Software Foundation, Inc.
+# Copyright (C) 2004-2025 Free Software Foundation, Inc.
 #
 # This file is free software; the Free Software Foundation
 # gives unlimited permission to copy and/or distribute it,
@@ -80,7 +80,7 @@ m4_if([$1], [v7],
     case $_am_tool in
     gnutar)
       for _am_tar in tar gnutar gtar; do
-        AM_RUN_LOG([$_am_tar --version]) && break
+        AM_RUN_LOG([$_am_tar --version | grep GNU >/dev/null]) && break
       done
       am__tar="$_am_tar --format=m4_if([$1], [pax], [posix], [$1]) -cf - "'"$$tardir"'
       am__tar_="$_am_tar --format=m4_if([$1], [pax], [posix], [$1]) -cf - "'"$tardir"'
@@ -89,7 +89,7 @@ m4_if([$1], [v7],
     plaintar)
       # Must skip GNU tar: if it does not support --format= it doesn't create
       # ustar tarball either.
-      (tar --version) >/dev/null 2>&1 && continue
+      (tar --version | grep GNU) >/dev/null 2>&1 && continue
       am__tar='tar cf - "$$tardir"'
       am__tar_='tar cf - "$tardir"'
       am__untar='tar xf -'
diff --git a/configure b/configure
index 4a091c898..75ef47683 100755
--- a/configure
+++ b/configure
@@ -11670,8 +11670,8 @@ printf %s "checking how to create a ustar tar archive... " >&6; }
     case $_am_tool in
     gnutar)
       for _am_tar in tar gnutar gtar; do
-        { echo "$as_me:$LINENO: $_am_tar --version" >&5
-   ($_am_tar --version) >&5 2>&5
+        { echo "$as_me:$LINENO: $_am_tar --version | grep GNU >/dev/null" >&5
+   ($_am_tar --version | grep GNU >/dev/null) >&5 2>&5
    ac_status=$?
    echo "$as_me:$LINENO: \$? = $ac_status" >&5
    (exit $ac_status); } && break
@@ -11683,7 +11683,7 @@ printf %s "checking how to create a ustar tar archive... " >&6; }
     plaintar)
       # Must skip GNU tar: if it does not support --format= it doesn't create
       # ustar tarball either.
-      (tar --version) >/dev/null 2>&1 && continue
+      (tar --version | grep GNU) >/dev/null 2>&1 && continue
       am__tar='tar cf - "$$tardir"'
       am__tar_='tar cf - "$tardir"'
       am__untar='tar xf -'