Fix PATH for Prefix.

1. remove default /bin:/sbin:/usr/bin:/usr/sbin
2. PKG_PREFIX should be defaulted to $(PREFIX)/usr
3. LOCAL_PREFIX should be defaulted to $(PREFIX)/usr/local

X-Gentoo-Bug:583634
X-Gentoo-Bug-URL:https://bugs.gentoo.org/show_bug.cgi?id=583634

mk/os-prefix.mk

@@ -3,4 +3,6 @@
 
 ifeq (${MKPREFIX},yes)
 CPPFLAGS+=	-DPREFIX
+PKG_PREFIX?=	$(PREFIX)/usr
+SED_EXTRA=	-e '/_PATH=.*usr.bin/d'
 endif

mk/os.mk

@@ -13,7 +13,7 @@
 _OS_SH=		uname -s | tr '/' '-'
 _OS:= 		$(shell ${_OS_SH})
 OS?= 		${_OS}
-include ${MK}/os-${OS}.mk
 include ${MK}/os-prefix.mk
+include ${MK}/os-${OS}.mk
 
 RC_LIB=		/$(LIBNAME)/rc

mk/sys.mk

@@ -26,7 +26,7 @@ ifeq (${MKPREFIX},yes)
 UPREFIX= ${PREFIX}/usr
 endif
 endif
-LOCAL_PREFIX=		/usr/local
+LOCAL_PREFIX=		$(UPREFIX)/local
 
 PICFLAG?=		-fPIC