INIT: tweak cc.{darwin,freebsd}; add cc.openbsd

(cherry picked from commit a1d8ff6faca522a29161582952e232afc76fd643)

src/cmd/INIT/cc.darwin

@@ -46,7 +46,7 @@ init)	echo "cc: arguments expected" >&2
 cpp)	$CC -E "$@"
 	;;
 cc)	$CC -DSHOPT_SPAWN=0 -D_ast_int8_t=int64_t -D_lib_memccpy \
-		-Wno-unused-value -Wno-parentheses -Wno-macro-redefined "$@"
+		-Wno-unused-value -Wno-parentheses "$@"
 	;;
 dll)	$CC -Wl,-flat_namespace -dynamiclib -undefined dynamic_lookup "$@"
 	;;

src/cmd/INIT/cc.freebsd

@@ -0,0 +1,12 @@
+: FreeBSD cc wrapper
+
+HOSTTYPE=freebsd.generic
+
+case " $* " in
+*" -dumpmachine "*) echo $HOSTTYPE; exit ;;
+esac
+
+exec /usr/bin/cc -P \
+	-Wno-unused-value \
+	-Wno-parentheses \
+	"$@"

src/cmd/INIT/cc.freebsd12.amd64

@@ -1,9 +0,0 @@
-: linux.i386-64 cc wrapper : 2006-02-14 :
-
-HOSTTYPE=freebsd12.amd64
-
-case " $* " in
-*" -dumpmachine "*) echo $HOSTTYPE; exit ;;
-esac
-
-/usr/bin/cc -P "$@"

src/cmd/INIT/cc.openbsd

@@ -0,0 +1,12 @@
+: OpenBSD cc wrapper
+
+HOSTTYPE=openbsd.generic
+
+case " $* " in
+*" -dumpmachine "*) echo $HOSTTYPE; exit ;;
+esac
+
+exec /usr/bin/cc -P \
+	-Wno-unused-value \
+	-Wno-parentheses \
+	"$@"