treewide: derive host and hostpkg path from STAGING_DIR

STAGING_DIR may be provided from command line. We currently hardcoded
STAGING_DIR_HOST and STAGING_DIR_HOSTPKG to the default location but we
currently have some relocatable patch that derive the path from
STAGING_DIR.

Fix this and correctly derive STAGING_DIR_HOST and STAGING_DIR_HOSTPKG
from STAGING_DIR.

The intention is to fix inconsistency from the relocatable patch and the
use of STAGING_DIR_HOST that is always hardcoded.
This with a wrong configuration may end up in broken state with some
host tools expecing a PATH from STAGING_DIR and others using library
from the default staging_dir/host path.

To save downstream project the original implementation is saved while
fixing the inconsistency between patch and .mk.

Signed-off-by: Christian Marangi <ansuelsmth@gmail.com>

Makefile

@@ -15,7 +15,7 @@ $(if $(findstring $(space),$(TOPDIR)),$(error ERROR: The path to the OpenWrt dir
 world:
 
 DISTRO_PKG_CONFIG:=$(shell $(TOPDIR)/scripts/command_all.sh pkg-config | grep '/usr' -m 1)
-export PATH:=$(TOPDIR)/staging_dir/host/bin:$(PATH)
+export PATH:=$(if $(STAGING_DIR),$(abspath $(STAGING_DIR)/../host/bin),$(TOPDIR)/staging_dir/host/bin):$(PATH)
 
 ifneq ($(OPENWRT_BUILD),1)
   _SINGLE=export MAKEFLAGS=$(space);

include/scan.mk

@@ -11,7 +11,7 @@ TARGET_STAMP:=$(TMP_DIR)/info/.files-$(SCAN_TARGET).stamp
 FILELIST:=$(TMP_DIR)/info/.files-$(SCAN_TARGET)-$(SCAN_COOKIE)
 OVERRIDELIST:=$(TMP_DIR)/info/.overrides-$(SCAN_TARGET)-$(SCAN_COOKIE)
 
-export PATH:=$(TOPDIR)/staging_dir/host/bin:$(PATH)
+export PATH:=$(STAGING_DIR_HOST)/bin:$(PATH)
 
 define feedname
 $(if $(patsubst feeds/%,,$(1)),,$(word 2,$(subst /, ,$(1))))

include/toplevel.mk

@@ -51,22 +51,22 @@ path:=$(subst :,$(space),$(PATH))
 path:=$(filter-out .%,$(path))
 path:=$(subst $(space),:,$(path))
 export PATH:=$(path)
+export STAGING_DIR_HOST:=$(if $(STAGING_DIR),$(abspath $(STAGING_DIR)/../host),$(TOPDIR)/staging_dir/host)
 
 unexport TAR_OPTIONS
 
 ifeq ($(FORCE),)
-  .config scripts/config/conf scripts/config/mconf: staging_dir/host/.prereq-build
+  .config scripts/config/conf scripts/config/mconf: $(STAGING_DIR_HOST)/.prereq-build
 endif
 
 SCAN_COOKIE?=$(shell echo $$$$)
 export SCAN_COOKIE
-export STAGING_DIR_HOST=$(TOPDIR)/staging_dir/host
 
 SUBMAKE:=umask 022; $(SUBMAKE)
 
 ULIMIT_FIX=_limit=`ulimit -n`; [ "$$_limit" = "unlimited" -o "$$_limit" -ge 1024 ] || ulimit -n 1024;
 
-prepare-mk: staging_dir/host/.prereq-build FORCE ;
+prepare-mk: $(STAGING_DIR_HOST)/.prereq-build FORCE ;
 
 ifdef SDK
   IGNORE_PACKAGES = linux
@@ -75,7 +75,7 @@ endif
 _ignore = $(foreach p,$(IGNORE_PACKAGES),--ignore $(p))
 
 prepare-tmpinfo: FORCE
-	@+$(MAKE) -r -s staging_dir/host/.prereq-build $(PREP_MK)
+	@+$(MAKE) -r -s $(STAGING_DIR_HOST)/.prereq-build $(PREP_MK)
 	mkdir -p tmp/info
 	$(_SINGLE)$(NO_TRACE_MAKE) -j1 -r -s -f include/scan.mk SCAN_TARGET="packageinfo" SCAN_DIR="package" SCAN_NAME="package" SCAN_DEPTH=5 SCAN_EXTRA=""
 	$(_SINGLE)$(NO_TRACE_MAKE) -j1 -r -s -f include/scan.mk SCAN_TARGET="targetinfo" SCAN_DIR="target/linux" SCAN_NAME="target" SCAN_DEPTH=3 SCAN_EXTRA="" SCAN_MAKEOPTS="TARGET_BUILD=1"
@@ -152,7 +152,7 @@ xconfig: scripts/config/qconf prepare-tmpinfo FORCE
 
 prepare_kernel_conf: .config toolchain/install FORCE
 
-ifeq ($(wildcard staging_dir/host/bin/quilt),)
+ifeq ($(wildcard $(STAGING_DIR_HOST)/bin/quilt),)
   prepare_kernel_conf:
 	@+$(SUBMAKE) -r tools/quilt/compile
 else
@@ -176,7 +176,7 @@ kernel_nconfig: prepare_kernel_conf
 kernel_xconfig: prepare_kernel_conf
 	$(_SINGLE)$(NO_TRACE_MAKE) -C target/linux xconfig
 
-staging_dir/host/.prereq-build: include/prereq-build.mk
+$(STAGING_DIR_HOST)/.prereq-build: include/prereq-build.mk
 	mkdir -p tmp
 	@$(_SINGLE)$(NO_TRACE_MAKE) -j1 -r -s -f $(TOPDIR)/include/prereq-build.mk prereq 2>/dev/null || { \
 		echo "Prerequisite check failed. Use FORCE=1 to override."; \
@@ -199,7 +199,7 @@ else
   DOWNLOAD_DIRS = package/download
 endif
 
-download: .config FORCE $(if $(wildcard $(TOPDIR)/staging_dir/host/bin/flock),,tools/flock/compile)
+download: .config FORCE $(if $(wildcard $(STAGING_DIR_HOST)/bin/flock),,tools/flock/compile)
 	@+$(foreach dir,$(DOWNLOAD_DIRS),$(SUBMAKE) $(dir);)
 
 clean dirclean: .config
@@ -263,7 +263,7 @@ distclean:
 	@$(_SINGLE)$(SUBMAKE) -C scripts/config clean
 
 ifeq ($(findstring v,$(DEBUG)),)
-  .SILENT: symlinkclean clean dirclean distclean config-clean download help tmpinfo-clean .config scripts/config/mconf scripts/config/conf menuconfig staging_dir/host/.prereq-build tmp/.prereq-package prepare-tmpinfo
+  .SILENT: symlinkclean clean dirclean distclean config-clean download help tmpinfo-clean .config scripts/config/mconf scripts/config/conf menuconfig $(STAGING_DIR_HOST)/.prereq-build tmp/.prereq-package prepare-tmpinfo
 endif
 .PHONY: help FORCE
 .NOTPARALLEL:

rules.mk

@@ -156,8 +156,8 @@ BUILD_LOG_DIR:=$(if $(call qstrip,$(CONFIG_BUILD_LOG_DIR)),$(call qstrip,$(CONFI
 PKG_INFO_DIR := $(STAGING_DIR)/pkginfo
 
 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:=$(TOPDIR)/staging_dir/hostpkg
+STAGING_DIR_HOST:=$(abspath $(STAGING_DIR)/../host)
+STAGING_DIR_HOSTPKG:=$(abspath $(STAGING_DIR)/../hostpkg)
 
 TARGET_PATH:=$(subst $(space),:,$(filter-out .,$(filter-out ./,$(subst :,$(space),$(PATH)))))
 TARGET_INIT_PATH:=$(call qstrip,$(CONFIG_TARGET_INIT_PATH))