Index: head/share/mk/src.opts.mk
===================================================================
--- head/share/mk/src.opts.mk
+++ head/share/mk/src.opts.mk
@@ -208,7 +208,6 @@
     CLANG_FORMAT \
     DTRACE_TESTS \
     EXPERIMENTAL \
-    GNU_GREP_COMPAT \
     HESIOD \
     LIBSOFT \
     LOADER_FIREWIRE \
Index: head/tools/build/options/WITHOUT_GNU_GREP_COMPAT
===================================================================
--- head/tools/build/options/WITHOUT_GNU_GREP_COMPAT
+++ head/tools/build/options/WITHOUT_GNU_GREP_COMPAT
@@ -1,3 +0,0 @@
-.\" $FreeBSD$
-Set this option to omit the gnu extensions to grep from being included in
-BSD grep.
Index: head/tools/build/options/WITH_GNU_GREP_COMPAT
===================================================================
--- head/tools/build/options/WITH_GNU_GREP_COMPAT
+++ head/tools/build/options/WITH_GNU_GREP_COMPAT
@@ -1,4 +0,0 @@
-.\" $FreeBSD$
-Set this option to include GNU extensions in
-.Xr bsdgrep 1
-by linking against libgnuregex.
Index: head/usr.bin/grep/Makefile
===================================================================
--- head/usr.bin/grep/Makefile
+++ head/usr.bin/grep/Makefile
@@ -60,10 +60,7 @@
 	grep.1 rgrep.1
 .endif
 
-.if ${MK_GNU_GREP_COMPAT} != "no"
-CFLAGS+=	-DWITH_GNU_COMPAT
 LIBADD+=	regex
-.endif
 
 HAS_TESTS=
 SUBDIR.${MK_TESTS}+= tests
Index: head/usr.bin/grep/grep.c
===================================================================
--- head/usr.bin/grep/grep.c
+++ head/usr.bin/grep/grep.c
@@ -62,8 +62,7 @@
 /* 5*/	"\t[--context[=num]] [--directories=action] [--label] [--line-buffered]\n",
 /* 6*/	"\t[--null] [pattern] [file ...]\n",
 /* 7*/	"Binary file %s matches\n",
-/* 8*/	"%s (BSD grep) %s\n",
-/* 9*/	"%s (BSD grep, GNU compatible) %s\n",
+/* 8*/	"%s (BSD grep, GNU compatible) %s\n",
 };
 
 /* Flags passed to regcomp() and regexec() */
@@ -555,11 +554,7 @@
 			filebehave = FILE_MMAP;
 			break;
 		case 'V':
-#ifdef WITH_GNU_COMPAT
-			printf(errstr[9], getprogname(), VERSION);
-#else
 			printf(errstr[8], getprogname(), VERSION);
-#endif
 			exit(0);
 		case 'v':
 			vflag = true;