# Makefile for OpenWrt
#
# Copyright (C) 2007-2012 OpenWrt.org
#
# This is free software, licensed under the GNU General Public License v2.
# See /LICENSE for more information.
#

PREP_MK= OPENWRT_BUILD= QUIET=0

export IS_TTY=$(shell tty -s && echo 1 || echo 0)

include $(TOPDIR)/include/verbose.mk

ifeq ($(SDK),1)
  include $(TOPDIR)/include/version.mk
else
  REVISION:=$(shell $(TOPDIR)/scripts/getver.sh)
  SOURCE_DATE_EPOCH:=$(shell $(TOPDIR)/scripts/get_source_date_epoch.sh)
endif

HOSTCC ?= $(CC)
export REVISION
export SOURCE_DATE_EPOCH
export GIT_CONFIG_PARAMETERS='core.autocrlf=false'
export GIT_ASKPASS:=/bin/true
export MAKE_JOBSERVER=$(filter --jobserver%,$(MAKEFLAGS))
export GNU_HOST_NAME:=$(shell $(TOPDIR)/scripts/config.guess)
export HOST_OS:=$(shell uname)
export HOST_ARCH:=$(shell uname -m)

# prevent perforce from messing with the patch utility
unexport P4PORT P4USER P4CONFIG P4CLIENT

# prevent user defaults for quilt from interfering
unexport QUILT_PATCHES QUILT_PATCH_OPTS

unexport C_INCLUDE_PATH CROSS_COMPILE ARCH

# prevent distro default LPATH from interfering
unexport LPATH

# make sure that a predefined CFLAGS variable does not disturb packages
export CFLAGS=
export LDFLAGS=

empty:=
space:= $(empty) $(empty)
path:=$(subst :,$(space),$(PATH))
path:=$(filter-out .%,$(path))
path:=$(subst $(space),:,$(path))
export PATH:=$(path)

unexport TAR_OPTIONS

ifneq ($(shell $(HOSTCC) 2>&1 | grep clang),)
  export HOSTCC_REAL?=$(HOSTCC)
  export HOSTCC_WRAPPER:=$(TOPDIR)/scripts/clang-gcc-wrapper
else
  export HOSTCC_WRAPPER:=$(HOSTCC)
endif

ifeq ($(FORCE),)
  .config scripts/config/conf scripts/config/mconf: staging_dir/host/.prereq-build
endif

SCAN_COOKIE?=$(shell echo $$$$)
export SCAN_COOKIE

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 ;

ifdef SDK
  IGNORE_PACKAGES = linux
endif

_ignore = $(foreach p,$(IGNORE_PACKAGES),--ignore $(p))

prepare-tmpinfo: FORCE
	@+$(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=2 SCAN_EXTRA="" SCAN_MAKEOPTS="TARGET_BUILD=1"
	for type in package target; do \
		f=tmp/.$${type}info; t=tmp/.config-$${type}.in; \
		[ "$$t" -nt "$$f" ] || ./scripts/$${type}-metadata.pl $(_ignore) config "$$f" > "$$t" || { rm -f "$$t"; echo "Failed to build $$t"; false; break; }; \
	done
	[ tmp/.config-feeds.in -nt tmp/.packageauxvars ] || ./scripts/feeds feed_config > tmp/.config-feeds.in
	./scripts/package-metadata.pl mk tmp/.packageinfo > tmp/.packagedeps || { rm -f tmp/.packagedeps; false; }
	./scripts/package-metadata.pl pkgaux tmp/.packageinfo > tmp/.packageauxvars || { rm -f tmp/.packageauxvars; false; }
	touch $(TOPDIR)/tmp/.build

.config: ./scripts/config/conf $(if $(CONFIG_HAVE_DOT_CONFIG),,prepare-tmpinfo)
	@+if [ \! -e .config ] || ! grep CONFIG_HAVE_DOT_CONFIG .config >/dev/null; then \
		[ -e $(HOME)/.openwrt/defconfig ] && cp $(HOME)/.openwrt/defconfig .config; \
		$(_SINGLE)$(NO_TRACE_MAKE) menuconfig $(PREP_MK); \
	fi

ifneq ($(DISTRO_PKG_CONFIG),)
scripts/config/%onf: export PATH:=$(dir $(DISTRO_PKG_CONFIG)):$(PATH)
endif
scripts/config/%onf: CFLAGS+= -O2
scripts/config/%onf:
	@$(_SINGLE)$(SUBMAKE) -s -C scripts/config $(notdir $@) CC="$(HOSTCC_WRAPPER)"

$(eval $(call rdep,scripts/config,scripts/config/mconf))

config: scripts/config/conf prepare-tmpinfo FORCE
	[ -L .config ] && export KCONFIG_OVERWRITECONFIG=1; \
		$< Config.in

config-clean: FORCE
	$(_SINGLE)$(NO_TRACE_MAKE) -C scripts/config clean

defconfig: scripts/config/conf prepare-tmpinfo FORCE
	touch .config
	@if [ ! -s .config -a -e $(HOME)/.openwrt/defconfig ]; then cp $(HOME)/.openwrt/defconfig .config; fi
	[ -L .config ] && export KCONFIG_OVERWRITECONFIG=1; \
		$< --defconfig=.config Config.in

confdefault-y=allyes
confdefault-m=allmod
confdefault-n=allno
confdefault:=$(confdefault-$(CONFDEFAULT))

oldconfig: scripts/config/conf prepare-tmpinfo FORCE
	[ -L .config ] && export KCONFIG_OVERWRITECONFIG=1; \
		$< --$(if $(confdefault),$(confdefault),old)config Config.in

menuconfig: scripts/config/mconf prepare-tmpinfo FORCE
	if [ \! -e .config -a -e $(HOME)/.openwrt/defconfig ]; then \
		cp $(HOME)/.openwrt/defconfig .config; \
	fi
	[ -L .config ] && export KCONFIG_OVERWRITECONFIG=1; \
		$< Config.in

xconfig: scripts/config/qconf prepare-tmpinfo FORCE
	if [ \! -e .config -a -e $(HOME)/.openwrt/defconfig ]; then \
		cp $(HOME)/.openwrt/defconfig .config; \
	fi
	$< Config.in

prepare_kernel_conf: .config toolchain/install FORCE

ifeq ($(wildcard staging_dir/host/bin/quilt),)
  prepare_kernel_conf:
	@+$(SUBMAKE) -r tools/quilt/compile
else
  prepare_kernel_conf: ;
endif

kernel_oldconfig: prepare_kernel_conf
	$(_SINGLE)$(NO_TRACE_MAKE) -C target/linux oldconfig

ifneq ($(DISTRO_PKG_CONFIG),)
kernel_menuconfig: export PATH:=$(dir $(DISTRO_PKG_CONFIG)):$(PATH)
kernel_nconfig: export PATH:=$(dir $(DISTRO_PKG_CONFIG)):$(PATH)
endif
kernel_menuconfig: prepare_kernel_conf
	$(_SINGLE)$(NO_TRACE_MAKE) -C target/linux menuconfig

kernel_nconfig: prepare_kernel_conf
	$(_SINGLE)$(NO_TRACE_MAKE) -C target/linux nconfig

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 || { \