build: move STAGING_DIR_HOSTPKG and BUILD_DIR_HOST back to a common directory for all targets

Using a single host package staging dir (and build dir) significantly speeds up
builds when multiple targets are built in succession, especially for large host
packages like NodeJS.

$(STAGING_DIR)/host is kept in addition to $(STAGING_DIR_HOSTPKG) in most
places; it is still used as destination for host files in Build/InstallDev.

Signed-off-by: Matthias Schiffer <mschiffer@universe-factory.net>

Makefile

@@ -55,7 +55,7 @@ clean: FORCE
 	rm -rf $(BUILD_DIR) $(STAGING_DIR) $(BIN_DIR) $(OUTPUT_DIR)/packages/$(ARCH_PACKAGES) $(BUILD_LOG_DIR) $(TOPDIR)/staging_dir/packages
 
 dirclean: clean
-	rm -rf $(STAGING_DIR_HOST) $(TOOLCHAIN_DIR) $(BUILD_DIR_HOST) $(BUILD_DIR_TOOLCHAIN)
+	rm -rf $(STAGING_DIR_HOST) $(STAGING_DIR_HOSTPKG) $(TOOLCHAIN_DIR) $(BUILD_DIR_BASE)/host $(BUILD_DIR_BASE)/hostpkg $(BUILD_DIR_TOOLCHAIN)
 	rm -rf $(TMP_DIR)
 
 ifndef DUMP_TARGET_DB

include/autotools.mk

@@ -75,7 +75,7 @@ define autoreconf_target
   $(strip $(call autoreconf, \
     $(PKG_BUILD_DIR), $(PKG_REMOVE_FILES), \
     $(PKG_AUTOMAKE_PATHS), $(PKG_LIBTOOL_PATHS), \
-    $(STAGING_DIR)/host/share/aclocal $(STAGING_DIR)/usr/share/aclocal $(PKG_MACRO_PATHS)))
+    $(STAGING_DIR)/host/share/aclocal $(STAGING_DIR_HOSTPKG)/share/aclocal $(STAGING_DIR)/usr/share/aclocal $(PKG_MACRO_PATHS)))
 endef
 
 define patch_libtool_target

include/cmake.mk

@@ -34,7 +34,7 @@ CMAKE_NM:=$(call cmake_tool,$(TARGET_NM))
 CMAKE_RANLIB:=$(call cmake_tool,$(TARGET_RANLIB))
 
 CMAKE_FIND_ROOT_PATH:=$(STAGING_DIR)/usr;$(TOOLCHAIN_DIR)$(if $(CONFIG_EXTERNAL_TOOLCHAIN),;$(CONFIG_TOOLCHAIN_ROOT))
-CMAKE_HOST_FIND_ROOT_PATH:=$(STAGING_DIR)/host;$(STAGING_DIR_HOST)
+CMAKE_HOST_FIND_ROOT_PATH:=$(STAGING_DIR)/host;$(STAGING_DIR_HOSTPKG);$(STAGING_DIR_HOST)
 CMAKE_SHARED_LDFLAGS:=-Wl,-Bsymbolic-functions
 
 define Build/Configure/Default

include/host-build.mk

@@ -122,7 +122,7 @@ ifneq ($(if $(HOST_QUILT),,$(CONFIG_AUTOREBUILD)),)
 endif
 
 define Host/Exports/Default
-  $(1) : export ACLOCAL_INCLUDE=$$(foreach p,$$(wildcard $$(STAGING_DIR_HOST)/share/aclocal $$(STAGING_DIR_HOST)/share/aclocal-* $(if $(IS_PACKAGE_BUILD),$$(STAGING_DIR)/host/share/aclocal $$(STAGING_DIR)/host/share/aclocal-*)),-I $$(p))
+  $(1) : export ACLOCAL_INCLUDE=$$(foreach p,$$(wildcard $$(STAGING_DIR_HOST)/share/aclocal $$(STAGING_DIR_HOST)/share/aclocal-* $(if $(IS_PACKAGE_BUILD),$$(STAGING_DIR)/host/share/aclocal $$(STAGING_DIR_HOSTPKG)/share/aclocal $$(STAGING_DIR)/host/share/aclocal-*)),-I $$(p))
   $(1) : export STAGING_PREFIX=$$(HOST_BUILD_PREFIX)
   $(1) : export PKG_CONFIG_PATH=$$(STAGING_DIR_HOST)/lib/pkgconfig:$$(HOST_BUILD_PREFIX)/lib/pkgconfig
   $(1) : export PKG_CONFIG_LIBDIR=$$(HOST_BUILD_PREFIX)/lib/pkgconfig

include/package.mk

@@ -130,7 +130,7 @@ ifdef USE_SOURCE_DIR
 endif
 
 define Build/Exports/Default
-  $(1) : export ACLOCAL_INCLUDE=$$(foreach p,$$(wildcard $$(STAGING_DIR)/usr/share/aclocal $$(STAGING_DIR)/usr/share/aclocal-* $$(STAGING_DIR)/host/share/aclocal $$(STAGING_DIR)/host/share/aclocal-*),-I $$(p))
+  $(1) : export ACLOCAL_INCLUDE=$$(foreach p,$$(wildcard $$(STAGING_DIR)/usr/share/aclocal $$(STAGING_DIR)/usr/share/aclocal-* $$(STAGING_DIR_HOSTPKG)/share/aclocal $$(STAGING_DIR_HOSTPKG)/share/aclocal-* $$(STAGING_DIR)/host/share/aclocal $$(STAGING_DIR)/host/share/aclocal-*),-I $$(p))
   $(1) : export STAGING_PREFIX=$$(STAGING_DIR)/usr
   $(1) : export PATH=$$(TARGET_PATH_PKG)
   $(1) : export CONFIG_SITE:=$$(CONFIG_SITE)

rules.mk

@@ -145,9 +145,9 @@ STAGING_DIR_ROOT:=$(STAGING_DIR)/root-$(BOARD)
 BUILD_LOG_DIR:=$(TOPDIR)/logs
 PKG_INFO_DIR := $(STAGING_DIR)/pkginfo
 
-BUILD_DIR_HOST:=$(if $(IS_PACKAGE_BUILD),$(BUILD_DIR)/host,$(BUILD_DIR_BASE)/host)
+BUILD_DIR_HOST:=$(if $(IS_PACKAGE_BUILD),$(BUILD_DIR_BASE)/hostpkg,$(BUILD_DIR_BASE)/host)
 STAGING_DIR_HOST:=$(TOPDIR)/staging_dir/host
-STAGING_DIR_HOSTPKG:=$(STAGING_DIR)/host
+STAGING_DIR_HOSTPKG:=$(TOPDIR)/staging_dir/hostpkg
 
 TARGET_PATH:=$(subst $(space),:,$(filter-out .,$(filter-out ./,$(subst :,$(space),$(PATH)))))
 TARGET_INIT_PATH:=$(call qstrip,$(CONFIG_TARGET_INIT_PATH))
@@ -206,7 +206,7 @@ ifndef DUMP
     endif
   endif
 endif
-TARGET_PATH_PKG:=$(STAGING_DIR)/host/bin:$(TARGET_PATH)
+TARGET_PATH_PKG:=$(STAGING_DIR)/host/bin:$(STAGING_DIR_HOSTPKG)/bin:$(TARGET_PATH)
 
 ifeq ($(CONFIG_SOFT_FLOAT),y)
   SOFT_FLOAT_CONFIG_OPTION:=--with-float=soft
@@ -232,9 +232,9 @@ export PKG_CONFIG
 
 HOSTCC:=gcc
 HOSTCXX:=g++
-HOST_CPPFLAGS:=-I$(STAGING_DIR_HOST)/include -I$(STAGING_DIR_HOST)/usr/include $(if $(IS_PACKAGE_BUILD),-I$(STAGING_DIR)/host/include)
+HOST_CPPFLAGS:=-I$(STAGING_DIR_HOST)/include -I$(STAGING_DIR_HOST)/usr/include $(if $(IS_PACKAGE_BUILD),-I$(STAGING_DIR_HOSTPKG)/include -I$(STAGING_DIR)/host/include)
 HOST_CFLAGS:=-O2 $(HOST_CPPFLAGS)
-HOST_LDFLAGS:=-L$(STAGING_DIR_HOST)/lib -L$(STAGING_DIR_HOST)/usr/lib $(if $(IS_PACKAGE_BUILD),-L$(STAGING_DIR)/host/lib)
+HOST_LDFLAGS:=-L$(STAGING_DIR_HOST)/lib -L$(STAGING_DIR_HOST)/usr/lib $(if $(IS_PACKAGE_BUILD),-L$(STAGING_DIR_HOSTPKG)/lib -L$(STAGING_DIR)/host/lib)
 
 ifeq ($(CONFIG_EXTERNAL_TOOLCHAIN),)
   TARGET_AR:=$(TARGET_CROSS)gcc-ar