build: stop overriding STAGING_DIR_HOST for toolchain build

This causes various issues in other places that assume that host
binaries are staged in STAGING_DIR_HOST.
Since all the right places use HOST_BUILD_PREFIX, override that instead.
This fixes some issues with quilt on toolchain dirs

Signed-off-by: Felix Fietkau <nbd@nbd.name>

include/host-build.mk

@@ -27,7 +27,7 @@ BUILD_TYPES += host
 HOST_STAMP_PREPARED:=$(HOST_BUILD_DIR)/.prepared$(if $(HOST_QUILT)$(DUMP),,$(shell $(call find_md5,${CURDIR} $(PKG_FILE_DEPENDS),))_$(call confvar,CONFIG_AUTOREMOVE $(HOST_PREPARED_DEPENDS)))
 HOST_STAMP_CONFIGURED:=$(HOST_BUILD_DIR)/.configured
 HOST_STAMP_BUILT:=$(HOST_BUILD_DIR)/.built
-HOST_BUILD_PREFIX:=$(if $(IS_PACKAGE_BUILD),$(STAGING_DIR_HOSTPKG),$(STAGING_DIR_HOST))
+HOST_BUILD_PREFIX?=$(if $(IS_PACKAGE_BUILD),$(STAGING_DIR_HOSTPKG),$(STAGING_DIR_HOST))
 HOST_STAMP_INSTALLED:=$(HOST_BUILD_PREFIX)/stamp/.$(PKG_NAME)_installed
 
 override MAKEFLAGS=

include/toolchain-build.mk

@@ -8,8 +8,7 @@
 override CONFIG_AUTOREBUILD=
 override CONFIG_AUTOREMOVE=
 
-REAL_STAGING_DIR_HOST:=$(STAGING_DIR_HOST)
-STAGING_DIR_HOST:=$(TOOLCHAIN_DIR)
+HOST_BUILD_PREFIX:=$(TOOLCHAIN_DIR)
 BUILD_DIR_HOST:=$(BUILD_DIR_TOOLCHAIN)
 
 include $(INCLUDE_DIR)/host-build.mk

toolchain/binutils/Makefile

@@ -34,8 +34,6 @@ HOST_BUILD_PARALLEL:=1
 
 PATCH_DIR:=./patches/$(PKG_VERSION)
 
-REAL_STAGING_DIR_HOST:=$(STAGING_DIR_HOST)
-
 include $(INCLUDE_DIR)/toolchain-build.mk
 
 BINUTILS_CONFIGURE:= \
@@ -96,7 +94,7 @@ define Host/Install
 		install
 	$(call FixupLibdir,$(TOOLCHAIN_DIR)/initial)
 	$(RM) $(TOOLCHAIN_DIR)/initial/lib/libiberty.a
-	$(CP) $(TOOLCHAIN_DIR)/bin/$(REAL_GNU_TARGET_NAME)-readelf $(REAL_STAGING_DIR_HOST)/bin/readelf
+	$(CP) $(TOOLCHAIN_DIR)/bin/$(REAL_GNU_TARGET_NAME)-readelf $(HOST_BUILD_PREFIX)/bin/readelf
 	# ARC gcc requires extlib.
 	# If extlib is not available in "initial" folder
 	# initial gcc will fail to build libc.

toolchain/gcc/common.mk

@@ -66,7 +66,7 @@ endif
 HOST_STAMP_PREPARED:=$(HOST_BUILD_DIR)/.prepared
 HOST_STAMP_BUILT:=$(GCC_BUILD_DIR)/.built
 HOST_STAMP_CONFIGURED:=$(GCC_BUILD_DIR)/.configured
-HOST_STAMP_INSTALLED:=$(STAGING_DIR_HOST)/stamp/.gcc_$(GCC_VARIANT)_installed
+HOST_STAMP_INSTALLED:=$(HOST_BUILD_PREFIX)/stamp/.gcc_$(GCC_VARIANT)_installed
 
 SEP:=,
 TARGET_LANGUAGES:="c,c++$(if $(CONFIG_INSTALL_LIBGCJ),$(SEP)java)$(if $(CONFIG_INSTALL_GFORTRAN),$(SEP)fortran)$(if $(CONFIG_INSTALL_GCCGO),$(SEP)go)"
@@ -86,7 +86,7 @@ ifdef CONFIG_INSTALL_GCCGO
 endif
 
 ifdef CONFIG_GCC_USE_GRAPHITE
-  GRAPHITE_CONFIGURE=--with-isl=$(REAL_STAGING_DIR_HOST)
+  GRAPHITE_CONFIGURE=--with-isl=$(HOST_BUILD_PREFIX)
 else
   GRAPHITE_CONFIGURE=--without-isl --without-cloog
 endif
@@ -213,8 +213,8 @@ endef
 
 define Host/Clean
 	rm -rf $(if $(GCC_PREPARE),$(HOST_SOURCE_DIR)) \
-		$(STAGING_DIR_HOST)/stamp/.gcc_* \
-		$(STAGING_DIR_HOST)/stamp/.binutils_* \
+		$(HOST_BUILD_PREFIX)/stamp/.gcc_* \
+		$(HOST_BUILD_PREFIX)/stamp/.binutils_* \
 		$(GCC_BUILD_DIR) \
 		$(BUILD_DIR_TOOLCHAIN)/$(PKG_NAME) \
 		$(TOOLCHAIN_DIR)/$(REAL_GNU_TARGET_NAME) \

toolchain/insight/Makefile

@@ -14,10 +14,7 @@ PKG_HASH:=51216df73adc4f68c67b60356270d5073f0ff094c1b477ecd96560f49707ea2a
 PKG_SOURCE_URL:=ftp://sourceware.org/pub/insight/releases
 PKG_CAT:=bzcat
 
-STAGING_DIR_HOST:=$(TOOLCHAIN_DIR)
-BUILD_DIR_HOST:=$(BUILD_DIR_TOOLCHAIN)
-
-include $(INCLUDE_DIR)/host-build.mk
+include $(INCLUDE_DIR)/toolchain-build.mk
 
 define Host/Configure
 	(cd $(HOST_BUILD_DIR); \