lang/gcc14-devel: Update to 14.0.0.s20231224

Also define __USE_ISOC11, which is defined in glibc but not in FreeBSD
libc. This is needed to successfully compile libssp without the
workaound that was used in the past and removed with commit
83b04e7.

lang/gcc14-devel/Makefile

@@ -1,6 +1,5 @@
 PORTNAME=	gcc
-PORTVERSION=	14.0.0.s20231126
-PORTREVISION=	1
+PORTVERSION=	14.0.0.s20231224
 CATEGORIES=	lang
 MASTER_SITES=	GCC/snapshots/${DIST_VERSION}
 PKGNAMESUFFIX=	${SUFFIX}-devel
@@ -38,7 +37,7 @@ CPE_VERSION=	${GCC_VERSION}
 DIST_VERSION=	${PORTVERSION:C/([0-9]+).*\.s([0-9]+)/\1-\2/}
 GCC_VERSION=	${PORTVERSION:C/(.+)\.s[0-9]{8}/\1/}
 SUFFIX=		${PORTVERSION:C/([0-9]+).*/\1/}
-CFLAGS:=	${CFLAGS:N-mretpoline}
+CFLAGS:=	${CFLAGS:N-mretpoline} -D__USE_ISOC11
 CXXFLAGS:=	${CXXFLAGS:N-mretpoline}
 
 OPTIONS_DEFINE=		GRAPHITE

lang/gcc14-devel/distinfo

@@ -1,3 +1,3 @@
-TIMESTAMP = 1701054405
-SHA256 (gcc-14-20231126.tar.xz) = 07d8920e5bf3c032471e464761dd1b994ba976be09fb4e30f8a10345aec72f25
-SIZE (gcc-14-20231126.tar.xz) = 86425216
+TIMESTAMP = 1703473415
+SHA256 (gcc-14-20231224.tar.xz) = 154d965f6a08288192f7b31484e54d070e53f2c574b3f0e495196fc0a5620005
+SIZE (gcc-14-20231224.tar.xz) = 87027056