Removed garbage:

- -elf in CFLAGS had no effect except to reduce portability.
- -elf in LDFLAGS had even less effect, since LDFLAGS is not used.
- -Wall in CFLAGS had no effect except to reduce portability and break
  overriding of WARNS, since the setting of WARNS implies -Wall.

lib/csu/i386-elf/Makefile

@@ -6,10 +6,8 @@ SRCS=		crt1.c crti.S crtn.S
 OBJS=		${SRCS:N*.h:R:S/$/.o/g}
 OBJS+=		gcrt1.o
 WARNS?=		6
-CFLAGS+=	-elf -Wall \
-		-I${.CURDIR}/../common \
+CFLAGS+=	-I${.CURDIR}/../common \
 		-I${.CURDIR}/../../libc/include
-LDFLAGS+=	-elf
 
 all: ${OBJS}