tests: fix grep warning leading to test failure

Recent grep version emits a warning when \ is found before /.
This leads to a test failure in libtool.

Patch sent upstream:
https://lists.gnu.org/archive/html/libtool-patches/2022-12/msg00004.html

Reviewed-by: Carlos O'Donell <carlos@redhat.com>

0001-tests-Fix-grep-warning-about-stray-before.patch

@@ -0,0 +1,35 @@
+From 414deacee0f564afdf2d7750450274c581330a59 Mon Sep 17 00:00:00 2001
+From: =?UTF-8?q?Fr=C3=A9d=C3=A9ric=20B=C3=A9rat?= <fberat@redhat.com>
+Date: Wed, 21 Dec 2022 13:14:03 +0100
+Subject: [PATCH] tests: Fix grep warning about stray \ before /
+
+Recent version of grep emit a warning if stray \ is found before /.
+This leads to the link-order test failure.
+
+ * tests/link-order.at: Remove unneeded \ before /
+---
+ tests/link-order.at | 4 ++--
+ 1 file changed, 2 insertions(+), 2 deletions(-)
+
+diff --git a/tests/link-order.at b/tests/link-order.at
+index 3f01a00d..a145347f 100644
+--- a/tests/link-order.at
++++ b/tests/link-order.at
+@@ -99,12 +99,12 @@ aix* | interix*) ;;  # These systems have different path syntax
+   case $hardcode_direct$hardcode_direct_absolute in
+   yesno)
+     AT_CHECK([if $EGREP relinking stderr; then
+-         $EGREP " .*\/new\/lib/libb$shared_ext .*\/old\/lib/libcee$shared_ext" stdout
++         $EGREP " .*/new/lib/libb$shared_ext .*/old/lib/libcee$shared_ext" stdout
+        else :; fi], [0], [ignore], [], [echo "wrong link order"])
+     ;;
+   *)
+     AT_CHECK([if $EGREP relinking stderr; then
+-         $EGREP " -L.*\/new\/lib -lb -L.*\/old\/lib -lcee" stdout
++         $EGREP " -L.*/new/lib -lb -L.*/old/lib -lcee" stdout
+        else :; fi], [0], [ignore], [], [echo "wrong link order"])
+     ;;
+   esac
+-- 
+2.38.1
+

libtool.spec

@@ -8,7 +8,7 @@
 Summary: The GNU Portable Library Tool
 Name:    libtool
 Version: 2.4.7
-Release: 2%{?dist}
+Release: 3%{?dist}
 License: GPLv2+ and LGPLv2+ and GFDL
 URL:     http://www.gnu.org/software/libtool/
 
@@ -39,6 +39,10 @@ Patch3: libtool-2.4.6-disable_non-pic_arm.patch
 # https://lists.gnu.org/archive/html/libtool-patches/2022-02/msg00000.html
 Patch4: libtool-2.4.6-keep-compiler-deps.patch
 
+# Patch sent upstream
+# https://lists.gnu.org/archive/html/libtool-patches/2022-12/msg00004.html
+Patch5: 0001-tests-Fix-grep-warning-about-stray-before.patch
+
 %if ! 0%{?_module_build}
 Patch100: libtool-nodocs.patch
 %endif
@@ -165,6 +169,9 @@ rm -f %{buildroot}%{_libdir}/libltdl.{a,la}
 
 
 %changelog
+* Wed Dec 21 2022 Frederic Berat <fberat@redhat.com> - 2.4.7-3
+- Fix test failure due to grep update
+
 * Thu Jul 21 2022 Fedora Release Engineering <releng@fedoraproject.org> - 2.4.7-2
 - Rebuilt for https://fedoraproject.org/wiki/Fedora_37_Mass_Rebuild