diff --git a/ctags-gcc11.patch b/ctags-gcc11.patch
new file mode 100644
index 0000000..ea78b7c
--- /dev/null
+++ b/ctags-gcc11.patch
@@ -0,0 +1,268 @@
+diff -u ctags-5.8.orig/c.c ctags-5.8/c.c
+--- ctags-5.8.orig/c.c	2021-09-27 10:44:24.772898854 +0200
++++ ctags-5.8/c.c	2021-09-27 10:58:15.168499970 +0200
+@@ -624,7 +624,7 @@
+ 	return name;
+ }
+ 
+-static void __unused__ pt (tokenInfo *const token)
++static void __maybe_unused__ pt (tokenInfo *const token)
+ {
+ 	if (isType (token, TOKEN_NAME))
+ 		printf ("type: %-12s: %-13s   line: %lu\n",
+@@ -639,7 +639,7 @@
+ 			tokenString (token->type), token->lineNumber);
+ }
+ 
+-static void __unused__ ps (statementInfo *const st)
++static void __maybe_unused__ ps (statementInfo *const st)
+ {
+ 	unsigned int i;
+ 	printf ("scope: %s   decl: %s   gotName: %s   gotParenName: %s isPointer: %s\n",
+diff -u ctags-5.8.orig/eiffel.c ctags-5.8/eiffel.c
+--- ctags-5.8.orig/eiffel.c	2021-09-27 10:44:24.732898295 +0200
++++ ctags-5.8/eiffel.c	2021-09-27 10:58:15.168499970 +0200
+@@ -807,7 +807,7 @@
+ 
+ static boolean parseType (tokenInfo *const token);
+ 
+-static void parseGeneric (tokenInfo *const token, boolean declaration __unused__)
++static void parseGeneric (tokenInfo *const token, boolean declaration __maybe_unused__)
+ {
+ 	unsigned int depth = 0;
+ #ifdef TYPE_REFERENCE_TOOL
+diff -u ctags-5.8.orig/general.h ctags-5.8/general.h
+--- ctags-5.8.orig/general.h	2007-05-03 05:21:08.000000000 +0200
++++ ctags-5.8/general.h	2021-09-27 10:57:03.851490665 +0200
+@@ -57,10 +57,10 @@
+  *  to prevent warnings about unused variables.
+  */
+ #if (__GNUC__ > 2  ||  (__GNUC__ == 2  &&  __GNUC_MINOR__ >= 7)) && !defined (__GNUG__)
+-# define __unused__  __attribute__((unused))
++# define __maybe_unused__  __attribute__((unused))
+ # define __printf__(s,f)  __attribute__((format (printf, s, f)))
+ #else
+-# define __unused__
++# define __maybe_unused__
+ # define __printf__(s,f)
+ #endif
+ 
+Common subdirectories: ctags-5.8.orig/gnu_regex and ctags-5.8/gnu_regex
+diff -u ctags-5.8.orig/lregex.c ctags-5.8/lregex.c
+--- ctags-5.8.orig/lregex.c	2021-09-27 10:44:24.732898295 +0200
++++ ctags-5.8/lregex.c	2021-09-27 10:58:15.176500083 +0200
+@@ -538,11 +538,11 @@
+ #endif  /* HAVE_REGEX */
+ 
+ extern void addTagRegex (
+-		const langType language __unused__,
+-		const char* const regex __unused__,
+-		const char* const name __unused__,
+-		const char* const kinds __unused__,
+-		const char* const flags __unused__)
++		const langType language __maybe_unused__,
++		const char* const regex __maybe_unused__,
++		const char* const name __maybe_unused__,
++		const char* const kinds __maybe_unused__,
++		const char* const flags __maybe_unused__)
+ {
+ #ifdef HAVE_REGEX
+ 	Assert (regex != NULL);
+@@ -564,10 +564,10 @@
+ }
+ 
+ extern void addCallbackRegex (
+-		const langType language __unused__,
+-		const char* const regex __unused__,
+-		const char* const flags __unused__,
+-		const regexCallback callback __unused__)
++		const langType language __maybe_unused__,
++		const char* const regex __maybe_unused__,
++		const char* const flags __maybe_unused__,
++		const regexCallback callback __maybe_unused__)
+ {
+ #ifdef HAVE_REGEX
+ 	Assert (regex != NULL);
+@@ -581,7 +581,7 @@
+ }
+ 
+ extern void addLanguageRegex (
+-		const langType language __unused__, const char* const regex __unused__)
++		const langType language __maybe_unused__, const char* const regex __maybe_unused__)
+ {
+ #ifdef HAVE_REGEX
+ 	if (! regexBroken)
+@@ -602,7 +602,7 @@
+ */
+ 
+ extern boolean processRegexOption (const char *const option,
+-								   const char *const parameter __unused__)
++								   const char *const parameter __maybe_unused__)
+ {
+ 	boolean handled = FALSE;
+ 	const char* const dash = strchr (option, '-');
+@@ -624,7 +624,7 @@
+ 	return handled;
+ }
+ 
+-extern void disableRegexKinds (const langType language __unused__)
++extern void disableRegexKinds (const langType language __maybe_unused__)
+ {
+ #ifdef HAVE_REGEX
+ 	if (language <= SetUpper  &&  Sets [language].count > 0)
+@@ -639,8 +639,8 @@
+ }
+ 
+ extern boolean enableRegexKind (
+-		const langType language __unused__,
+-		const int kind __unused__, const boolean mode __unused__)
++		const langType language __maybe_unused__,
++		const int kind __maybe_unused__, const boolean mode __maybe_unused__)
+ {
+ 	boolean result = FALSE;
+ #ifdef HAVE_REGEX
+@@ -660,7 +660,7 @@
+ 	return result;
+ }
+ 
+-extern void printRegexKinds (const langType language __unused__, boolean indent __unused__)
++extern void printRegexKinds (const langType language __maybe_unused__, boolean indent __maybe_unused__)
+ {
+ #ifdef HAVE_REGEX
+ 	if (language <= SetUpper  &&  Sets [language].count > 0)
+diff -u ctags-5.8.orig/lua.c ctags-5.8/lua.c
+--- ctags-5.8.orig/lua.c	2006-10-12 05:26:40.000000000 +0200
++++ ctags-5.8/lua.c	2021-09-27 10:58:15.176500083 +0200
+@@ -37,7 +37,7 @@
+ */
+ 
+ /* for debugging purposes */
+-static void __unused__ print_string (char *p, char *q)
++static void __maybe_unused__ print_string (char *p, char *q)
+ {
+ 	for ( ; p != q; p++)
+ 		fprintf (errout, "%c", *p);
+diff -u ctags-5.8.orig/main.c ctags-5.8/main.c
+--- ctags-5.8.orig/main.c	2021-09-27 10:44:24.784899021 +0200
++++ ctags-5.8/main.c	2021-09-27 10:58:15.176500083 +0200
+@@ -511,7 +511,7 @@
+  *		Start up code
+  */
+ 
+-extern int main (int __unused__ argc, char **argv)
++extern int main (int __maybe_unused__ argc, char **argv)
+ {
+ 	cookedArgs *args;
+ #ifdef VMS
+diff -u ctags-5.8.orig/options.c ctags-5.8/options.c
+--- ctags-5.8.orig/options.c	2021-09-27 10:44:24.784899021 +0200
++++ ctags-5.8/options.c	2021-09-27 10:58:15.180500140 +0200
+@@ -731,7 +731,7 @@
+ }
+ 
+ static void processExcludeOption (
+-		const char *const option __unused__, const char *const parameter)
++		const char *const option __maybe_unused__, const char *const parameter)
+ {
+ 	const char *const fileName = parameter + 1;
+ 	if (parameter [0] == '\0')
+@@ -869,7 +869,7 @@
+ }
+ 
+ static void processFilterTerminatorOption (
+-		const char *const option __unused__, const char *const parameter)
++		const char *const option __maybe_unused__, const char *const parameter)
+ {
+ 	freeString (&Option.filterTerminator);
+ 	Option.filterTerminator = stringCopy (parameter);
+@@ -931,8 +931,8 @@
+ }
+ 
+ static void processHelpOption (
+-		const char *const option __unused__,
+-		const char *const parameter __unused__)
++		const char *const option __maybe_unused__,
++		const char *const parameter __maybe_unused__)
+ {
+ 	printProgramIdentification ();
+ 	putchar ('\n');
+@@ -1140,8 +1140,8 @@
+ }
+ 
+ static void processLicenseOption (
+-		const char *const option __unused__,
+-		const char *const parameter __unused__)
++		const char *const option __maybe_unused__,
++		const char *const parameter __maybe_unused__)
+ {
+ 	printProgramIdentification ();
+ 	puts ("");
+@@ -1167,8 +1167,8 @@
+ }
+ 
+ static void processListMapsOption (
+-		const char *const __unused__ option,
+-		const char *const __unused__ parameter)
++		const char *const __maybe_unused__ option,
++		const char *const __maybe_unused__ parameter)
+ {
+ 	if (parameter [0] == '\0' || strcasecmp (parameter, "all") == 0)
+ 	    printLanguageMaps (LANG_AUTO);
+@@ -1184,8 +1184,8 @@
+ }
+ 
+ static void processListLanguagesOption (
+-		const char *const option __unused__,
+-		const char *const parameter __unused__)
++		const char *const option __maybe_unused__,
++		const char *const parameter __maybe_unused__)
+ {
+ 	printLanguageList ();
+ 	exit (0);
+@@ -1359,8 +1359,8 @@
+ }
+ 
+ static void processVersionOption (
+-		const char *const option __unused__,
+-		const char *const parameter __unused__)
++		const char *const option __maybe_unused__,
++		const char *const parameter __maybe_unused__)
+ {
+ 	printProgramIdentification ();
+ 	exit (0);
+diff -u ctags-5.8.orig/parse.c ctags-5.8/parse.c
+--- ctags-5.8.orig/parse.c	2007-07-31 07:35:33.000000000 +0200
++++ ctags-5.8/parse.c	2021-09-27 10:58:15.180500140 +0200
+@@ -376,7 +376,7 @@
+ */
+ 
+ extern void processLanguageDefineOption (
+-		const char *const option, const char *const parameter __unused__)
++		const char *const option, const char *const parameter __maybe_unused__)
+ {
+ #ifdef HAVE_REGEX
+ 	if (parameter [0] == '\0')
+diff -u ctags-5.8.orig/python.c ctags-5.8/python.c
+--- ctags-5.8.orig/python.c	2021-09-27 10:44:24.736898351 +0200
++++ ctags-5.8/python.c	2021-09-27 10:58:15.180500140 +0200
+@@ -135,7 +135,7 @@
+  * extract all relevant information and create a tag.
+  */
+ static void makeFunctionTag (vString *const function,
+-	vString *const parent, int is_class_parent, const char *arglist __unused__)
++	vString *const parent, int is_class_parent, const char *arglist __maybe_unused__)
+ {
+ 	tagEntryInfo tag;
+ 	initTagEntry (&tag, vStringValue (function));
+diff -u ctags-5.8.orig/routines.c ctags-5.8/routines.c
+--- ctags-5.8.orig/routines.c	2007-06-07 06:35:21.000000000 +0200
++++ ctags-5.8/routines.c	2021-09-27 10:58:15.184500196 +0200
+@@ -526,7 +526,7 @@
+ 
+ #if ! defined (HAVE_STAT_ST_INO)
+ 
+-static void canonicalizePath (char *const path __unused__)
++static void canonicalizePath (char *const path __maybe_unused__)
+ {
+ #if defined (MSDOS_STYLE_PATH)
+ 	char *p;
diff --git a/ctags.changes b/ctags.changes
index 19fcc0b..9103e2e 100644
--- a/ctags.changes
+++ b/ctags.changes
@@ -1,3 +1,9 @@
+-------------------------------------------------------------------
+Mon Sep 27 08:59:35 UTC 2021 - Michal Suchanek <msuchanek@suse.com>
+
+- Fix build with gcc 11
+  + ctags-gcc11.patch
+
 -------------------------------------------------------------------
 Tue May  4 11:15:01 UTC 2021 - Stefan Brüns <stefan.bruens@rwth-aachen.de>
 
diff --git a/ctags.spec b/ctags.spec
index 9bea532..8876a0a 100644
--- a/ctags.spec
+++ b/ctags.spec
@@ -46,6 +46,7 @@ Patch16:        0016-CVE-2014-7204.patch
 Patch17:        0017-Go-language-support.patch
 Patch18:        0018-SUSE-man-page-changes.patch
 Patch19:        0019-Do-not-include-build-time-in-binary.patch
+Patch20:        ctags-gcc11.patch
 BuildRequires:  update-alternatives
 Requires(pre):  update-alternatives
 Requires(post): update-alternatives
@@ -59,25 +60,7 @@ Emacs, and several other editors.
 
 %prep
 %setup -q
-%patch1 -p1
-%patch2 -p1
-%patch3 -p1
-%patch4 -p1
-%patch5 -p1
-%patch6 -p1
-%patch7 -p1
-%patch8 -p1
-%patch9 -p1
-%patch10 -p1
-%patch11 -p1
-%patch12 -p1
-%patch13 -p1
-%patch14 -p1
-%patch15 -p1
-%patch16 -p1
-%patch17 -p1
-%patch18 -p1
-%patch19 -p1
+%autopatch -p1
 
 %build
 %configure