Don't use CCACHE for linking.

MFC after:	2 weeks
Sponsored by:	Dell EMC

gnu/usr.bin/cc/cc1/Makefile

@@ -20,7 +20,7 @@ LDADD=	${LIBBACKEND} ${LIBCPP} ${LIBDECNUMBER} ${LIBIBERTY}
 
 DOBJS+=	${SRCS:N*.h:R:S/$/.o/g}
 ${PROG}-dummy:	${DOBJS}
-	${CC} ${CFLAGS} ${LDFLAGS} -o ${.TARGET} ${DOBJS} ${LDADD}
+	${CC:N${CCACHE_BIN}} ${CFLAGS} ${LDFLAGS} -o ${.TARGET} ${DOBJS} ${LDADD}
 CLEANFILES+=	${PROG}-dummy
 
 ${PROG}-checksum.c:	${PROG}-dummy

gnu/usr.bin/cc/cc1plus/Makefile

@@ -35,7 +35,7 @@ CLEANFILES= cfns.h
 
 DOBJS+=	${SRCS:N*.h:R:S/$/.o/g}
 ${PROG}-dummy:	${DOBJS}
-	${CC} ${CFLAGS} ${LDFLAGS} -o ${.TARGET} ${DOBJS} ${LDADD}
+	${CC:N${CCACHE_BIN}} ${CFLAGS} ${LDFLAGS} -o ${.TARGET} ${DOBJS} ${LDADD}
 CLEANFILES+=	${PROG}-dummy
 
 ${PROG}-checksum.c:	${PROG}-dummy

gnu/usr.bin/cc/cc_tools/Makefile

@@ -276,7 +276,7 @@ CLEANFILES+= gengtype-yacc.c
 
 gengtype: gengtype.o gengtype-yacc+%DIKED.o gengtype-lex.o errors.o \
 	  ${LIBIBERTY}
-	${CC} ${CFLAGS} ${LDFLAGS} -o ${.TARGET} ${.ALLSRC}
+	${CC:N${CCACHE_BIN}} ${CFLAGS} ${LDFLAGS} -o ${.TARGET} ${.ALLSRC}
 
 gtype-desc.h:	gengtype
 	${BTOOLSPATH:U.}/gengtype
@@ -292,18 +292,18 @@ CLEANFILES+=	gt-*.h gtype-*.h
 #
 .for F in check checksum genrtl modes
 gen$F:	gen$F.o errors.o ${LIBIBERTY}
-	${CC} ${CFLAGS} ${LDFLAGS} -o ${.TARGET} ${.ALLSRC}
+	${CC:N${CCACHE_BIN}} ${CFLAGS} ${LDFLAGS} -o ${.TARGET} ${.ALLSRC}
 .endfor
 
 .for F in attr attrtab automata codes conditions config constants emit \
 	extract flags  opinit output peep preds recog
 gen$F:	gen$F.o rtl.o read-rtl.o ggc-none.o vec.o min-insn-modes.o \
 	gensupport.o print-rtl.o errors.o ${LIBIBERTY}
-	${CC} ${CFLAGS} ${LDFLAGS} -o ${.TARGET} ${.ALLSRC} -lm
+	${CC:N${CCACHE_BIN}} ${CFLAGS} ${LDFLAGS} -o ${.TARGET} ${.ALLSRC} -lm
 .endfor
 
 gencondmd:	gencondmd.o
-	${CC} ${CFLAGS} ${LDFLAGS} -o ${.TARGET} ${.ALLSRC}
+	${CC:N${CCACHE_BIN}} ${CFLAGS} ${LDFLAGS} -o ${.TARGET} ${.ALLSRC}
 
 #
 # Generated .md files.