OpenWrt – Rev 3

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# 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/.packagesubdirs ] || ./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 subdirs tmp/.packageinfo > tmp/.packagesubdirs || { rm -f tmp/.packagesubdirs; 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

scripts/config/mconf:
        @$(_SINGLE)$(SUBMAKE) -s -C scripts/config all CC="$(HOSTCC_WRAPPER)"

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

scripts/config/qconf:
        @$(_SINGLE)$(SUBMAKE) -s -C scripts/config qconf CC="$(HOSTCC_WRAPPER)"

scripts/config/conf:
        @$(_SINGLE)$(SUBMAKE) -s -C scripts/config conf CC="$(HOSTCC_WRAPPER)"

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 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

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 $(TOPDIR)/include/prereq-build.mk prereq 2>/dev/null || { \
                echo "Prerequisite check failed. Use FORCE=1 to override."; \
                false; \
        }
  ifneq ($(realpath $(TOPDIR)/include/prepare.mk),)
        @$(_SINGLE)$(NO_TRACE_MAKE) -j1 -r -s -f $(TOPDIR)/include/prepare.mk prepare 2>/dev/null || { \
                echo "Preparation failed."; \
                false; \
        }
  endif
        touch $@

printdb: FORCE
        @$(_SINGLE)$(NO_TRACE_MAKE) -p $@ V=99 DUMP_TARGET_DB=1 2>&1

ifndef SDK
  DOWNLOAD_DIRS = tools/download toolchain/download package/download target/download
else
  DOWNLOAD_DIRS = package/download
endif

download: .config FORCE $(if $(wildcard $(TOPDIR)/staging_dir/host/bin/flock),,tools/flock/compile)
        @+$(foreach dir,$(DOWNLOAD_DIRS),$(SUBMAKE) $(dir);)

clean dirclean: .config
        @+$(SUBMAKE) -r $@

prereq:: prepare-tmpinfo .config
        @+$(NO_TRACE_MAKE) -r -s $@

check: .config FORCE
        @+$(NO_TRACE_MAKE) -r -s $@ QUIET= V=s

val.%: FORCE
        @+$(NO_TRACE_MAKE) -r -s $@ QUIET= V=s

WARN_PARALLEL_ERROR = $(if $(BUILD_LOG),,$(and $(filter -j,$(MAKEFLAGS)),$(findstring s,$(OPENWRT_VERBOSE))))

ifeq ($(SDK),1)

%::
        @+$(PREP_MK) $(NO_TRACE_MAKE) -r -s prereq
        @./scripts/config/conf --defconfig=.config Config.in
        @+$(ULIMIT_FIX) $(SUBMAKE) -r $@

else

%::
        @+$(PREP_MK) $(NO_TRACE_MAKE) -r -s prereq
        @( \
                cp .config tmp/.config; \
                ./scripts/config/conf --defconfig=tmp/.config -w tmp/.config Config.in > /dev/null 2>&1; \
                if ./scripts/kconfig.pl '>' .config tmp/.config | grep -q CONFIG; then \
                        printf "$(_R)WARNING: your configuration is out of sync. Please run make menuconfig, oldconfig or defconfig!$(_N)\n" >&2; \
                fi \
        )
        @+$(ULIMIT_FIX) $(SUBMAKE) -r $@ $(if $(WARN_PARALLEL_ERROR), || { \
                printf "$(_R)Build failed - please re-run with -j1 to see the real error message$(_N)\n" >&2; \
                false; \
        } )

endif

# update all feeds, re-create index files, install symlinks
package/symlinks:
        ./scripts/feeds update -a
        ./scripts/feeds install -a

# re-create index files, install symlinks
package/symlinks-install:
        ./scripts/feeds update -i
        ./scripts/feeds install -a

# remove all symlinks, don't touch ./feeds
package/symlinks-clean:
        ./scripts/feeds uninstall -a

help:
        cat README

distclean:
        rm -rf bin build_dir .config* dl feeds key-build* logs package/feeds package/openwrt-packages staging_dir tmp
        @$(_SINGLE)$(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
endif
.PHONY: help FORCE
.NOTPARALLEL: