diff --git a/x11-libs/libgxim/files/libgxim-0.5.0-gcc14.patch b/x11-libs/libgxim/files/libgxim-0.5.0-gcc14.patch
new file mode 100644
index 0000000000000..36e62471d5914
--- /dev/null
+++ b/x11-libs/libgxim/files/libgxim-0.5.0-gcc14.patch
@@ -0,0 +1,40 @@
+From 274976ff39d9142169a18655f5013e66233ac9c8 Mon Sep 17 00:00:00 2001
+From: Akira TAGOH <akira@tagoh.org>
+Date: Wed, 14 Feb 2018 13:20:40 +0900
+Subject: [PATCH] Fix a build fail
+
+---
+ libgxim/gximcore.c       | 2 --
+ libgxim/gximprotocol10.c | 2 +-
+ 2 files changed, 1 insertion(+), 3 deletions(-)
+
+diff --git a/libgxim/gximcore.c b/libgxim/gximcore.c
+index a92c413..3955d01 100644
+--- a/libgxim/gximcore.c
++++ b/libgxim/gximcore.c
+@@ -26,9 +26,7 @@
+ #endif
+ 
+ #include <glib/gi18n-lib.h>
+-#ifdef GNOME_ENABLE_DEBUG
+ #include <gdk/gdkx.h>
+-#endif /* GNOME_ENABLE_DEBUG */
+ #include "gximacc.h"
+ #include "gximconnection.h"
+ #include "gximmarshal.h"
+diff --git a/libgxim/gximprotocol10.c b/libgxim/gximprotocol10.c
+index 04887a5..65bd4df 100644
+--- a/libgxim/gximprotocol10.c
++++ b/libgxim/gximprotocol10.c
+@@ -2073,7 +2073,7 @@ g_xim_protocol10_closure_real_parser_error(GXimProtocol *proto,
+ 	msg = g_strdup_printf("Unable to parse the protocol %s properly",
+ 			      g_xim_protocol_name(major_opcode));
+ 
+-	g_xim_messages_error(G_XIM_PROTOCOL_GET_IFACE (proto)->message, msg);
++	g_xim_messages_error(G_XIM_PROTOCOL_GET_IFACE (proto)->message, "%s", msg);
+ 	switch (major_opcode) {
+ 	    case G_XIM_CONNECT:
+ 	    case G_XIM_AUTH_REQUIRED:
+-- 
+2.45.0
+
diff --git a/x11-libs/libgxim/libgxim-0.5.0.ebuild b/x11-libs/libgxim/libgxim-0.5.0-r1.ebuild
similarity index 88%
rename from x11-libs/libgxim/libgxim-0.5.0.ebuild
rename to x11-libs/libgxim/libgxim-0.5.0-r1.ebuild
index 3a0811f9cd0d3..f7a149908a9b8 100644
--- a/x11-libs/libgxim/libgxim-0.5.0.ebuild
+++ b/x11-libs/libgxim/libgxim-0.5.0-r1.ebuild
@@ -33,6 +33,12 @@ BDEPEND="${RUBY_DEPS}
 
 AT_M4DIR="m4macros"
 
+PATCHES=(
+	# backport upstream fix for gcc 14 implicit function declarations and by
+	# extension, LTO type mismatches. Also fixes format-security.
+	"${FILESDIR}"/${P}-gcc14.patch
+)
+
 src_prepare() {
 	sed -i \
 		-e "/PKG_CHECK_MODULES/s/\(check\)/$(usex test '\1' _)/" \