Makefile: introduce $(HOST_DIR) for host binaries

Add HOST_DIR directory handling. HOST_DIR should be used just like
STAGING_DIR, but for host files instead of target ones.

Makefile

@@ -282,7 +282,7 @@ $(BR2_DEPENDS_DIR): .config
 	cp -dpRf $(CONFIG)/buildroot-config $@
 
 dirs: $(DL_DIR) $(TOOL_BUILD_DIR) $(BUILD_DIR) $(STAGING_DIR) $(TARGET_DIR) \
-	$(BR2_DEPENDS_DIR) $(BINARIES_DIR) $(PROJECT_BUILD_DIR) \
+	$(HOST_DIR) $(BR2_DEPENDS_DIR) $(BINARIES_DIR) $(PROJECT_BUILD_DIR) \
 	$(PROJECT_BUILD_DIR)/autotools-stamps
 
 $(BASE_TARGETS): dirs
@@ -294,7 +294,7 @@ world: dependencies dirs target-host-info $(BASE_TARGETS) $(TARGETS_ALL)
 	$(BASE_TARGETS) $(TARGETS) $(TARGETS_ALL) \
 	$(TARGETS_CLEAN) $(TARGETS_DIRCLEAN) $(TARGETS_SOURCE) \
 	$(DL_DIR) $(TOOL_BUILD_DIR) $(BUILD_DIR) $(STAGING_DIR) $(TARGET_DIR) \
-	$(BR2_DEPENDS_DIR) $(BINARIES_DIR) $(PROJECT_BUILD_DIR) \
+	$(HOST_DIR) $(BR2_DEPENDS_DIR) $(BINARIES_DIR) $(PROJECT_BUILD_DIR) \
 	$(PROJECT_BUILD_DIR)/autotools-stamps
 
 #############################################################
@@ -303,7 +303,7 @@ world: dependencies dirs target-host-info $(BASE_TARGETS) $(TARGETS_ALL)
 # dependencies anywhere else
 #
 #############################################################
-$(DL_DIR) $(TOOL_BUILD_DIR) $(BUILD_DIR) $(PROJECT_BUILD_DIR) \
+$(DL_DIR) $(TOOL_BUILD_DIR) $(BUILD_DIR) $(HOST_DIR) $(PROJECT_BUILD_DIR) \
 	$(PROJECT_BUILD_DIR)/autotools-stamps $(BINARIES_DIR):
 	@mkdir -p $@
 

package/Makefile.in

@@ -290,7 +290,9 @@ HOST_CONFIGURE_OPTS=PATH=$(TARGET_PATH) \
 		ORIGINAL_AS_FOR_TARGET="$(TARGET_AS)" \
 		ORIGINAL_LD_FOR_TARGET="$(TARGET_LD)" \
 		ORIGINAL_NM_FOR_TARGET="$(TARGET_NM)" \
-		ORIGINAL_OBJDUMP_FOR_TARGET="$(TARGET_OBJDUMP)"
+		ORIGINAL_OBJDUMP_FOR_TARGET="$(TARGET_OBJDUMP)" \
+		PKG_CONFIG="$(STAGING_DIR)/usr/bin/pkg-config" \
+		PKG_CONFIG_PATH="$(HOST_DIR)/usr/lib/pkgconfig:$(PKG_CONFIG_PATH)"
 
 #######################################################################
 # settings we need to pass to configure

project/Makefile.in

@@ -68,6 +68,9 @@ GNU_TARGET_SUFFIX:=-$(strip $(subst ",, $(BR2_GNU_TARGET_SUFFIX)))
 STAGING_DIR:=$(strip $(subst ",, $(BR2_STAGING_DIR)))
 #"))
 
+# packages compiled for the host goes here
+HOST_DIR:=$(BUILD_DIR)/host_dir
+
 # All configurable packages (like Busybox,Linux etc) should be built
 # in PROJECT_BUILD_DIR
 PROJECT_BUILD_DIR:=$(BASE_DIR)/$(TOPDIR_PREFIX)project_build_$(ARCH)$(ARCH_FPU_SUFFIX)$(TOPDIR_SUFFIX)/$(PROJECT)