games/quake2-rogue: try to unbreak the port against Clang 16

While here, set the MAKEFILE instead of copying the Makefile,
drop dubious or even bogus compiler options (see the log for
commit 7b672c1318 for exact reasons) and needless LDFLAGS.

Reported by:	pkg-fallout

games/quake2-rogue/Makefile

@@ -10,6 +10,7 @@ MAINTAINER=	danfe@FreeBSD.org
 COMMENT=	Quake II: Ground Zero (Rogue) official mission pack
 WWW=		http://www.idsoftware.com/games/quake/quake2-grndzero/
 
+MAKEFILE=	${FILESDIR}/Makefile
 NO_WRKSUBDIR=	yes
 SUB_FILES=	pkg-message
 
@@ -20,11 +21,9 @@ do-extract:
 	@cd ${WRKSRC} && uncompress -c ${DISTDIR}/${DISTFILES} | \
 		${TAIL} +454 | ${SH}
 
-post-extract:
-	@${CP} ${FILESDIR}/${MAKEFILE} ${WRKSRC}
-
 post-patch:
 	@${REINPLACE_CMD} -e '/#include <nan\.h>/d' ${WRKSRC}/g_local.h
+	@${REINPLACE_CMD} -e '/extern SP_monster_makron/d' ${WRKSRC}/m_boss31.c
 	@${REINPLACE_CMD} -e 's/__linux__/__unix__/' ${WRKSRC}/q_shared.[ch]
 
 do-install:

games/quake2-rogue/files/Makefile

@@ -64,9 +64,7 @@ SRCS=		dm_ball.c \
 		p_weapon.c \
 		q_shared.c
 
-CFLAGS+=	-Dstricmp=strcasecmp -ffast-math -funroll-loops \
-		-fomit-frame-pointer -fexpensive-optimizations
-
-LDFLAGS+=	-L/lib -L/usr/lib -lm
+CFLAGS+=	-Dstricmp=strcasecmp -ffast-math \
+		-Wno-incompatible-function-pointer-types
 
 .include <bsd.lib.mk>