diff --git a/giflib.changes b/giflib.changes
index d461e8a..bdc9f77 100644
--- a/giflib.changes
+++ b/giflib.changes
@@ -1,3 +1,9 @@
+-------------------------------------------------------------------
+Mon Dec 12 21:29:29 UTC 2022 - Dirk Müller <dmueller@suse.com>
+
+- add reproducible.patch to avoid timestamp patching in the build
+  section and allowing it to build with -Werror=date-time 
+
 -------------------------------------------------------------------
 Thu Apr 15 15:15:15 UTC 2021 - olaf@aepfle.de
 
diff --git a/giflib.spec b/giflib.spec
index 2ac0016..d1e238d 100644
--- a/giflib.spec
+++ b/giflib.spec
@@ -1,7 +1,7 @@
 #
 # spec file for package giflib
 #
-# Copyright (c) 2021 SUSE LLC
+# Copyright (c) 2022 SUSE LLC
 #
 # All modifications and additions to the file contributed by third parties
 # remain the property of their copyright owners, unless otherwise agreed
@@ -22,10 +22,11 @@ Version:        5.2.1
 Release:        0
 Summary:        A Library for Working with GIF Images
 License:        MIT
-URL:            http://giflib.sf.net/
-Source:         http://downloads.sf.net/giflib/%{name}-%{version}.tar.gz
+URL:            https://giflib.sourceforge.net/
+Source:         https://downloads.sf.net/giflib/%{name}-%{version}.tar.gz
 Source2:        baselibs.conf
 Patch1:         PIE.patch
+Patch2:         reproducible.patch
 BuildRequires:  libtool >= 2
 
 %description
@@ -59,21 +60,8 @@ have expired, giflib can again be used instead of libungif.
 %autosetup -p1
 
 %build
-for file in `find util -name "*.c"`; do
-	touch -r $file $file.stamp
-done
-
-# USE __TIMESTAMP__ instead of __DATE__ , __TIME__
-# this change is pointless unless we preserve the original
-# file modification time
-for file in `find util -name "*.c"`; do
-	sed -i -e s@'__DATE__ ",   " __TIME__'@__TIMESTAMP__@g $file;
-    touch -r $file.stamp $file;
-    rm -v $file.stamp
-done
-
-export CFLAGS="%optflags"
-make %{?_smp_mflags}
+export CFLAGS="%{optflags}"
+%make_build
 
 %install
 %make_install PREFIX="%{_prefix}" LIBDIR="%{_libdir}"
diff --git a/reproducible.patch b/reproducible.patch
new file mode 100644
index 0000000..3ff1758
--- /dev/null
+++ b/reproducible.patch
@@ -0,0 +1,132 @@
+Index: giflib-5.2.1/gif2rgb.c
+===================================================================
+--- giflib-5.2.1.orig/gif2rgb.c
++++ giflib-5.2.1/gif2rgb.c
+@@ -43,7 +43,6 @@ static char
+ 	PROGRAM_NAME
+ 	VERSION_COOKIE
+ 	"	Gershon Elber,	"
+-	__DATE__ ",   " __TIME__ "\n"
+ 	"(C) Copyright 1989 Gershon Elber.\n";
+ static char
+     *CtrlStr =
+Index: giflib-5.2.1/gifbg.c
+===================================================================
+--- giflib-5.2.1.orig/gifbg.c
++++ giflib-5.2.1/gifbg.c
+@@ -46,7 +46,6 @@ static char
+ 	PROGRAM_NAME
+ 	VERSION_COOKIE
+ 	"	Gershon Elber,	"
+-	__DATE__ ",   " __TIME__ "\n"
+ 	"(C) Copyright 1989 Gershon Elber.\n";
+ static char
+     *CtrlStr =
+Index: giflib-5.2.1/gifbuild.c
+===================================================================
+--- giflib-5.2.1.orig/gifbuild.c
++++ giflib-5.2.1/gifbuild.c
+@@ -23,7 +23,6 @@ static char
+ 	PROGRAM_NAME
+ 	VERSION_COOKIE
+ 	"	Eric Raymond,	"
+-	__DATE__ ",   " __TIME__ "\n"
+ 	"(C) Copyright 1992 Eric Raymond.\n";
+ static char
+     *CtrlStr =
+Index: giflib-5.2.1/gifclrmp.c
+===================================================================
+--- giflib-5.2.1.orig/gifclrmp.c
++++ giflib-5.2.1/gifclrmp.c
+@@ -24,7 +24,6 @@ static char
+ 	PROGRAM_NAME
+ 	VERSION_COOKIE
+ 	"	Gershon Elber,	"
+-	__DATE__ ",   " __TIME__ "\n"
+ 	"(C) Copyright 1989 Gershon Elber.\n";
+ static char
+     *CtrlStr =
+Index: giflib-5.2.1/gifcolor.c
+===================================================================
+--- giflib-5.2.1.orig/gifcolor.c
++++ giflib-5.2.1/gifcolor.c
+@@ -25,7 +25,6 @@ static char
+ 	PROGRAM_NAME
+ 	VERSION_COOKIE
+ 	"	Gershon Elber,	"
+-	__DATE__ ",   " __TIME__ "\n"
+ 	"(C) Copyright 1989 Gershon Elber.\n";
+ static char
+     *CtrlStr = PROGRAM_NAME " v%- b%-Background!d h%-";
+Index: giflib-5.2.1/gifecho.c
+===================================================================
+--- giflib-5.2.1.orig/gifecho.c
++++ giflib-5.2.1/gifecho.c
+@@ -32,7 +32,6 @@ static char
+ 	PROGRAM_NAME
+ 	VERSION_COOKIE
+ 	"	Gershon Elber,	"
+-	__DATE__ ",   " __TIME__ "\n"
+ 	"(C) Copyright 1989 Gershon Elber.\n";
+ static char
+     *CtrlStr =
+Index: giflib-5.2.1/giffix.c
+===================================================================
+--- giflib-5.2.1.orig/giffix.c
++++ giflib-5.2.1/giffix.c
+@@ -22,7 +22,6 @@ static char
+ 	PROGRAM_NAME
+ 	VERSION_COOKIE
+ 	"	Gershon Elber,	"
+-	__DATE__ ",   " __TIME__ "\n"
+ 	"(C) Copyright 1989 Gershon Elber.\n";
+ static char
+     *CtrlStr =
+Index: giflib-5.2.1/gifhisto.c
+===================================================================
+--- giflib-5.2.1.orig/gifhisto.c
++++ giflib-5.2.1/gifhisto.c
+@@ -26,7 +26,6 @@ static char
+ 	PROGRAM_NAME
+ 	VERSION_COOKIE
+ 	"	Gershon Elber,	"
+-	__DATE__ ",   " __TIME__ "\n"
+ 	"(C) Copyright 1989 Gershon Elber.\n";
+ static char
+     *CtrlStr =
+Index: giflib-5.2.1/gifinto.c
+===================================================================
+--- giflib-5.2.1.orig/gifinto.c
++++ giflib-5.2.1/gifinto.c
+@@ -35,7 +35,6 @@ static char
+ 	PROGRAM_NAME
+ 	VERSION_COOKIE
+ 	"	Gershon Elber,	"
+-	__DATE__ ",   " __TIME__ "\n"
+ 	"(C) Copyright 1989 Gershon Elber.\n";
+ static char
+     *CtrlStr =
+Index: giflib-5.2.1/giftext.c
+===================================================================
+--- giflib-5.2.1.orig/giftext.c
++++ giflib-5.2.1/giftext.c
+@@ -28,7 +28,6 @@ static char
+ 	PROGRAM_NAME
+ 	VERSION_COOKIE
+ 	"	Gershon Elber,	"
+-	__DATE__ ",   " __TIME__ "\n"
+ 	"(C) Copyright 1989 Gershon Elber.\n";
+ static char
+     *CtrlStr =
+Index: giflib-5.2.1/gifwedge.c
+===================================================================
+--- giflib-5.2.1.orig/gifwedge.c
++++ giflib-5.2.1/gifwedge.c
+@@ -27,7 +27,6 @@ static char
+ 	PROGRAM_NAME
+ 	VERSION_COOKIE
+ 	"	Gershon Elber,	"
+-	__DATE__ ",   " __TIME__ "\n"
+ 	"(C) Copyright 1989 Gershon Elber.\n";
+ static char
+     *CtrlStr =