X-Git-Url: https://git.librecmc.org/?a=blobdiff_plain;f=Makefile;h=1fc6fce5b9eb9acf2aa023f8fe6aa71bef5fd6c6;hb=66b86c690245714d9c59bf4487d081115f2d820b;hp=44d5b5e931a4b7f3b86e4bafde696968cc7dc4eb;hpb=0b7d70c822ae473b42a9db95cdc026286d992a48;p=oweals%2Fbusybox.git diff --git a/Makefile b/Makefile index 44d5b5e93..1fc6fce5b 100644 --- a/Makefile +++ b/Makefile @@ -1,443 +1,1289 @@ -# Makefile for busybox +VERSION = 1 +PATCHLEVEL = 2 +SUBLEVEL = 2 +EXTRAVERSION = .svn +NAME = Unnamed + +# *DOCUMENTATION* +# To see a list of typical targets execute "make help" +# More info can be located in ./README +# Comments in this file are targeted only to the developer, do not +# expect to learn how to build the kernel reading this file. + +# Do not print "Entering directory ..." +MAKEFLAGS += --no-print-directory + +# We are using a recursive build, so we need to do a little thinking +# to get the ordering right. # -# Copyright (C) 1999,2000,2001 Erik Andersen -# -# This program is free software; you can redistribute it and/or modify -# it under the terms of the GNU General Public License as published by -# the Free Software Foundation; either version 2 of the License, or -# (at your option) any later version. -# -# This program is distributed in the hope that it will be useful, -# but WITHOUT ANY WARRANTY; without even the implied warranty of -# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU -# General Public License for more details. -# -# You should have received a copy of the GNU General Public License -# along with this program; if not, write to the Free Software -# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA +# Most importantly: sub-Makefiles should only ever modify files in +# their own directory. If in some directory we have a dependency on +# a file in another dir (which doesn't happen often, but it's often +# unavoidable when linking the built-in.o targets which finally +# turn into busybox), we will call a sub make in that other dir, and +# after that we are sure that everything which is in that other dir +# is now up to date. # +# The only cases where we need to modify files which have global +# effects are thus separated out and done before the recursive +# descending is started. They are now explicitly listed as the +# prepare rule. + +# To put more focus on warnings, be less verbose as default +# Use 'make V=1' to see the full commands + +ifdef V + ifeq ("$(origin V)", "command line") + KBUILD_VERBOSE = $(V) + endif +endif +ifndef KBUILD_VERBOSE + KBUILD_VERBOSE = 0 +endif -PROG := busybox -VERSION := 0.60.0 -BUILDTIME := $(shell TZ=UTC date -u "+%Y.%m.%d-%H:%M%z") -export VERSION - -# With a modern GNU make(1) (highly recommended, that's what all the -# developers use), all of the following configuration values can be -# overridden at the command line. For example: -# make CROSS=powerpc-linux- BB_SRC_DIR=$HOME/busybox PREFIX=/mnt/app - -# If you want to add some simple compiler switches (like -march=i686), -# especially from the command line, use this instead of CFLAGS directly. -# For optimization overrides, it's better still to set OPTIMIZATION. -CFLAGS_EXTRA = - -# If you want a static binary, turn this on. -DOSTATIC = false - -# Set the following to `true' to make a debuggable build. -# Leave this set to `false' for production use. -DODEBUG = false - -# Setting this to `true' will cause busybox to directly use the system's -# password and group functions. Assuming you use GNU libc, when this is -# `true', you will need to install the /etc/nsswitch.conf configuration file -# and the required libnss_* libraries. This generally makes your embedded -# system quite a bit larger... If you leave this off, busybox will directly use -# the /etc/password, /etc/group files (and your system will be smaller, and I -# will get fewer emails asking about how glibc NSS works). Enabling this adds -# just 1.4k to the binary size (which is a _lot_ less then glibc NSS costs). -# Note that if you want hostname resolution to work with glibc, you still need -# the libnss_* libraries. Most people will want to leave this set to false. -USE_SYSTEM_PWD_GRP = true - -# This enables compiling with dmalloc ( http://dmalloc.com/ ) -# which is an excellent public domain mem leak and malloc problem -# detector. To enable dmalloc, before running busybox you will -# want to first set up your environment. -# eg: `export DMALLOC_OPTIONS=debug=0x14f47d83,inter=100,log=logfile` -# Do not enable this for production builds... -DODMALLOC = false - -# Electric-fence is another very useful malloc debugging library. -# Do not enable this for production builds... -DOEFENCE = false - -# If you want large file summit support, turn this on. -# This has no effect if you don't have a kernel with lfs -# support, and a system with libc-2.1.3 or later. -# Some of the programs that can benefit from lfs support -# are dd, gzip, mount, tar, and mkfs_minix. -# LFS allows you to use the above programs for files -# larger than 2GB! -DOLFS = false - -# If you have a "pristine" source directory, point BB_SRC_DIR to it. -# Experimental and incomplete; tell the mailing list -# if you do or don't like it so far. -BB_SRC_DIR = - -# If you are running a cross compiler, you may want to set this -# to something more interesting, like "powerpc-linux-". -CROSS = -CC = $(CROSS)gcc -AR = $(CROSS)ar -STRIPTOOL = $(CROSS)strip - -# To compile vs uClibc, just use the compiler wrapper built by uClibc... -# This make things very easy? Everything should compile and work as -# expected these days... -#CC = ../uClibc/extra/gcc-uClibc/i386-uclibc-gcc - -# To compile vs some other alternative libc, you may need to use/adjust -# the following lines to meet your needs... -# -# If you are using Red Hat 6.x with the compatible RPMs (for developing under -# Red Hat 5.x and glibc 2.0) uncomment the following. Be sure to read about -# using the compatible RPMs (compat-*) at http://www.redhat.com ! -#LIBCDIR=/usr/i386-glibc20-linux -# -# The following is used for libc5 (if you install altgcc and libc5-altdev -# on a Debian system). -#LIBCDIR=/usr/i486-linuxlibc1 -# -# For other libraries, you are on your own... -#LDFLAGS+=-nostdlib -#LIBRARIES = $(LIBCDIR)/lib/libc.a -lgcc -#CROSS_CFLAGS+=-nostdinc -I$(LIBCDIR)/include -I$(GCCINCDIR) -#GCCINCDIR = $(shell gcc -print-search-dirs | sed -ne "s/install: \(.*\)/\1include/gp") +# Call sparse as part of compilation of C files +# Use 'make C=1' to enable sparse checking -# use '-Os' optimization if available, else use -O2 -OPTIMIZATION := $(shell if $(CC) -Os -S -o /dev/null -xc /dev/null >/dev/null 2>&1; \ - then echo "-Os"; else echo "-O2" ; fi) +ifdef C + ifeq ("$(origin C)", "command line") + KBUILD_CHECKSRC = $(C) + endif +endif +ifndef KBUILD_CHECKSRC + KBUILD_CHECKSRC = 0 +endif -WARNINGS = -Wall -Wshadow +# Use make M=dir to specify directory of external module to build +# Old syntax make ... SUBDIRS=$PWD is still supported +# Setting the environment variable KBUILD_EXTMOD take precedence +ifdef SUBDIRS + KBUILD_EXTMOD ?= $(SUBDIRS) +endif +ifdef M + ifeq ("$(origin M)", "command line") + KBUILD_EXTMOD := $(M) + endif +endif -ARFLAGS = -r -# -#-------------------------------------------------------- -# If you're going to do a lot of builds with a non-vanilla configuration, -# it makes sense to adjust parameters above, so you can type "make" -# by itself, instead of following it by the same half-dozen overrides -# every time. The stuff below, on the other hand, is probably less -# prone to casual user adjustment. +# kbuild supports saving output files in a separate directory. +# To locate output files in a separate directory two syntaxes are supported. +# In both cases the working directory must be the root of the kernel src. +# 1) O= +# Use "make O=dir/to/store/output/files/" # +# 2) Set KBUILD_OUTPUT +# Set the environment variable KBUILD_OUTPUT to point to the directory +# where the output files shall be placed. +# export KBUILD_OUTPUT=dir/to/store/output/files/ +# make +# +# The O= assignment takes precedence over the KBUILD_OUTPUT environment +# variable. -ifeq ($(strip $(DOLFS)),true) - # For large file summit support - CFLAGS+=-D_FILE_OFFSET_BITS=64 -endif -ifeq ($(strip $(DODMALLOC)),true) - # For testing mem leaks with dmalloc - CFLAGS+=-DDMALLOC - LIBRARIES = -ldmalloc - # Force debug=true, since this is useless when not debugging... - DODEBUG = true -else - ifeq ($(strip $(DOEFENCE)),true) - LIBRARIES = -lefence - # Force debug=true, since this is useless when not debugging... - DODEBUG = true - endif + +# KBUILD_SRC is set on invocation of make in OBJ directory +# KBUILD_SRC is not intended to be used by the regular user (for now) +ifeq ($(KBUILD_SRC),) + +# OK, Make called in directory where kernel src resides +# Do we want to locate output files in a separate directory? +ifdef O + ifeq ("$(origin O)", "command line") + KBUILD_OUTPUT := $(O) + endif endif -ifeq ($(strip $(DODEBUG)),true) - CFLAGS += $(WARNINGS) -g -D_GNU_SOURCE - LDFLAGS += -Wl,-warn-common - STRIP = + +# That's our default target when none is given on the command line +PHONY := _all +_all: + +ifneq ($(KBUILD_OUTPUT),) +# Invoke a second make in the output directory, passing relevant variables +# check that the output directory actually exists +saved-output := $(KBUILD_OUTPUT) +KBUILD_OUTPUT := $(shell cd $(KBUILD_OUTPUT) && /bin/pwd) +$(if $(KBUILD_OUTPUT),, \ + $(error output directory "$(saved-output)" does not exist)) + +PHONY += $(MAKECMDGOALS) + +$(filter-out _all,$(MAKECMDGOALS)) _all: + $(if $(KBUILD_VERBOSE:1=),@)$(MAKE) -C $(KBUILD_OUTPUT) \ + KBUILD_SRC=$(CURDIR) \ + KBUILD_EXTMOD="$(KBUILD_EXTMOD)" -f $(CURDIR)/Makefile $@ + +# Leave processing to above invocation of make +skip-makefile := 1 +endif # ifneq ($(KBUILD_OUTPUT),) +endif # ifeq ($(KBUILD_SRC),) + +# We process the rest of the Makefile if this is the final invocation of make +ifeq ($(skip-makefile),) + +# If building an external module we do not care about the all: rule +# but instead _all depend on modules +PHONY += all +ifeq ($(KBUILD_EXTMOD),) +_all: all else - CFLAGS += $(WARNINGS) $(OPTIMIZATION) -fomit-frame-pointer -D_GNU_SOURCE - LDFLAGS += -s -Wl,-warn-common - STRIP = $(STRIPTOOL) --remove-section=.note --remove-section=.comment $(PROG) +_all: modules endif -ifeq ($(strip $(DOSTATIC)),true) - LDFLAGS += --static - # - #use '-ffunction-sections -fdata-sections' and '--gc-sections' (if they - # work) to try and strip out any unused junk. Doesn't do much for me, - # but you may want to give it a shot... - # - #ifeq ($(shell $(CC) -ffunction-sections -fdata-sections -S \ - # -o /dev/null -xc /dev/null 2>/dev/null && $(LD) \ - # --gc-sections -v >/dev/null && echo 1),1) - # CFLAGS += -ffunction-sections -fdata-sections - # LDFLAGS += --gc-sections - #endif + +srctree := $(if $(KBUILD_SRC),$(KBUILD_SRC),$(CURDIR)) +TOPDIR := $(srctree) +# FIXME - TOPDIR is obsolete, use srctree/objtree +objtree := $(CURDIR) +src := $(srctree) +obj := $(objtree) + +VPATH := $(srctree)$(if $(KBUILD_EXTMOD),:$(KBUILD_EXTMOD)) + +export srctree objtree VPATH TOPDIR + + +# SUBARCH tells the usermode build what the underlying arch is. That is set +# first, and if a usermode build is happening, the "ARCH=um" on the command +# line overrides the setting of ARCH below. If a native build is happening, +# then ARCH is assigned, getting whatever value it gets normally, and +# SUBARCH is subsequently ignored. + +SUBARCH := $(shell uname -m | sed -e s/i.86/i386/ -e s/sun4u/sparc64/ \ + -e s/arm.*/arm/ -e s/sa110/arm/ \ + -e s/s390x/s390/ -e s/parisc64/parisc/ \ + -e s/ppc.*/powerpc/ -e s/mips.*/mips/ ) + +# Cross compiling and selecting different set of gcc/bin-utils +# --------------------------------------------------------------------------- +# +# When performing cross compilation for other architectures ARCH shall be set +# to the target architecture. (See arch/* for the possibilities). +# ARCH can be set during invocation of make: +# make ARCH=ia64 +# Another way is to have ARCH set in the environment. +# The default ARCH is the host where make is executed. + +# CROSS_COMPILE specify the prefix used for all executables used +# during compilation. Only gcc and related bin-utils executables +# are prefixed with $(CROSS_COMPILE). +# CROSS_COMPILE can be set on the command line +# make CROSS_COMPILE=ia64-linux- +# Alternatively CROSS_COMPILE can be set in the environment. +# Default value for CROSS_COMPILE is not to prefix executables +# Note: Some architectures assign CROSS_COMPILE in their arch/*/Makefile + +ARCH ?= $(SUBARCH) +CROSS_COMPILE ?= + +# Architecture as present in compile.h +UTS_MACHINE := $(ARCH) + +# SHELL used by kbuild +CONFIG_SHELL := $(shell if [ -x "$$BASH" ]; then echo $$BASH; \ + else if [ -x /bin/bash ]; then echo /bin/bash; \ + else echo sh; fi ; fi) + +HOSTCC = gcc +HOSTCXX = g++ +HOSTCFLAGS = -Wall -Wstrict-prototypes -O2 -fomit-frame-pointer +HOSTCXXFLAGS = -O2 + +# Decide whether to build built-in, modular, or both. +# Normally, just do built-in. + +KBUILD_MODULES := +KBUILD_BUILTIN := 1 + +# If we have only "make modules", don't compile built-in objects. +# When we're building modules with modversions, we need to consider +# the built-in objects during the descend as well, in order to +# make sure the checksums are uptodate before we record them. + +ifeq ($(MAKECMDGOALS),modules) + KBUILD_BUILTIN := $(if $(CONFIG_MODVERSIONS),1) endif -ifndef $(PREFIX) - PREFIX = `pwd`/_install +# If we have "make modules", compile modules +# in addition to whatever we do anyway. +# Just "make" or "make all" shall build modules as well + +ifneq ($(filter all _all modules,$(MAKECMDGOALS)),) + KBUILD_MODULES := 1 endif -# Additional complications due to support for pristine source dir. -# Include files in the build directory should take precedence over -# the copy in BB_SRC_DIR, both during the compilation phase and the -# shell script that finds the list of object files. -# Work in progress by . -# -ifneq ($(strip $(BB_SRC_DIR)),) - VPATH = $(BB_SRC_DIR) +ifeq ($(MAKECMDGOALS),) + KBUILD_MODULES := 1 endif -#ifneq ($(strip $(VPATH)),) -# CFLAGS += -I- -I. $(patsubst %,-I%,$(subst :, ,$(VPATH))) -#endif - -# We need to set APPLET_SOURCES to something like -# $(shell busybox.sh Config.h) -# but in a manner that works with VPATH and BB_SRC_DIR. -# Possible ways to approach this: + +export KBUILD_MODULES KBUILD_BUILTIN +export KBUILD_CHECKSRC KBUILD_SRC KBUILD_EXTMOD + +# Beautify output +# --------------------------------------------------------------------------- # -# 1. Explicitly search through .:$(VPATH) for busybox.sh and config.h, -# then $(shell $(BUSYBOX_SH) $(CONFIG_H) $(BB_SRC_DIR)) +# Normally, we echo the whole command before executing it. By making +# that echo $($(quiet)$(cmd)), we now have the possibility to set +# $(quiet) to choose other forms of output instead, e.g. # -# 2. Explicity search through .:$(VPATH) for slist.mk, -# then $(shell $(MAKE) -f $(SLIST_MK) VPATH=$(VPATH) BB_SRC_DIR=$(BB_SRC_DIR)) +# quiet_cmd_cc_o_c = Compiling $(RELDIR)/$@ +# cmd_cc_o_c = $(CC) $(c_flags) -c -o $@ $< # -# 3. Create slist.mk in this directory, with commands embedded in -# a $(shell ...) command, and $(MAKE) it immediately. +# If $(quiet) is empty, the whole command will be printed. +# If it is set to "quiet_", only the short version will be printed. +# If it is set to "silent_", nothing wil be printed at all, since +# the variable $(silent_cmd_cc_o_c) doesn't exist. # -# 4. Use a real rule within this makefile to create a file that sets -# APPLET_SOURCE_LIST, then include that file. Has complications -# with the first trip through the makefile (before processing the -# include) trying to do too much, and a spurious warning the first -# time make is run. +# A simple variant is to prefix commands with $(Q) - that's useful +# for commands that shall be hidden in non-verbose mode. # -# This is option 3: +# $(Q)ln $@ :< # -#APPLET_SOURCES = $(shell \ -# echo -e 'all: busybox.sh Config.h\n\t@ $$(SHELL) $$^ $$(BB_SRC_DIR)' >slist.mk; \ -# make -f slist.mk VPATH=$(VPATH) BB_SRC_DIR=$(BB_SRC_DIR) \ -#) -# And option 4: --include applet_source_list - -OBJECTS = $(APPLET_SOURCES:.c=.o) busybox.o usage.o applets.o -CFLAGS += $(CROSS_CFLAGS) -CFLAGS += -DBB_VER='"$(VERSION)"' -CFLAGS += -DBB_BT='"$(BUILDTIME)"' -ifdef BB_INIT_SCRIPT - CFLAGS += -DINIT_SCRIPT='"$(BB_INIT_SCRIPT)"' +# If KBUILD_VERBOSE equals 0 then the above command will be hidden. +# If KBUILD_VERBOSE equals 1 then the above command is displayed. + +ifeq ($(KBUILD_VERBOSE),1) + quiet = + Q = +else + quiet=quiet_ + Q = @ +endif + +# If the user is running make -s (silent mode), suppress echoing of +# commands + +ifneq ($(findstring s,$(MAKEFLAGS)),) + quiet=silent_ +endif + +export quiet Q KBUILD_VERBOSE + + +# Look for make include files relative to root of kernel src +MAKEFLAGS += --include-dir=$(srctree) + +# We need some generic definitions +include $(srctree)/scripts/Kbuild.include + +# For maximum performance (+ possibly random breakage, uncomment +# the following) + +MAKEFLAGS += -rR + +# Make variables (CC, etc...) + +AS = $(CROSS_COMPILE)as +LD = $(CROSS_COMPILE)ld +CC = $(CROSS_COMPILE)gcc +CPP = $(CC) -E +AR = $(CROSS_COMPILE)ar +NM = $(CROSS_COMPILE)nm +STRIP = $(CROSS_COMPILE)strip +OBJCOPY = $(CROSS_COMPILE)objcopy +OBJDUMP = $(CROSS_COMPILE)objdump +AWK = awk +GENKSYMS = scripts/genksyms/genksyms +DEPMOD = /sbin/depmod +KALLSYMS = scripts/kallsyms +PERL = perl +CHECK = sparse + +CHECKFLAGS := -D__linux__ -Dlinux -D__STDC__ -Dunix -D__unix__ -Wbitwise $(CF) +MODFLAGS = -DMODULE +CFLAGS_MODULE = $(MODFLAGS) +AFLAGS_MODULE = $(MODFLAGS) +LDFLAGS_MODULE = -r +CFLAGS_KERNEL = +AFLAGS_KERNEL = + + +# Use LINUXINCLUDE when you must reference the include/ directory. +# Needed to be compatible with the O= option +CFLAGS := +CPPFLAGS := +AFLAGS := + +# Read KERNELRELEASE from .kernelrelease (if it exists) +KERNELRELEASE = $(shell cat .kernelrelease 2> /dev/null) +KERNELVERSION = $(VERSION).$(PATCHLEVEL).$(SUBLEVEL)$(EXTRAVERSION) + +export VERSION PATCHLEVEL SUBLEVEL KERNELRELEASE KERNELVERSION \ + ARCH CONFIG_SHELL HOSTCC HOSTCFLAGS CROSS_COMPILE AS LD CC \ + CPP AR NM STRIP OBJCOPY OBJDUMP MAKE AWK GENKSYMS PERL UTS_MACHINE \ + HOSTCXX HOSTCXXFLAGS LDFLAGS_MODULE CHECK CHECKFLAGS + +export CPPFLAGS NOSTDINC_FLAGS LINUXINCLUDE OBJCOPYFLAGS LDFLAGS +export CFLAGS CFLAGS_KERNEL CFLAGS_MODULE +export AFLAGS AFLAGS_KERNEL AFLAGS_MODULE + +# When compiling out-of-tree modules, put MODVERDIR in the module +# tree rather than in the kernel tree. The kernel tree might +# even be read-only. +export MODVERDIR := $(if $(KBUILD_EXTMOD),$(firstword $(KBUILD_EXTMOD))/).tmp_versions + +# Files to ignore in find ... statements + +RCS_FIND_IGNORE := \( -name SCCS -o -name BitKeeper -o -name .svn -o -name CVS -o -name .pc -o -name .hg -o -name .git \) -prune -o +export RCS_TAR_IGNORE := --exclude SCCS --exclude BitKeeper --exclude .svn --exclude CVS --exclude .pc --exclude .hg --exclude .git + +# =========================================================================== +# Rules shared between *config targets and build targets + +# Basic helpers built in scripts/ +PHONY += scripts_basic +scripts_basic: + $(Q)$(MAKE) $(build)=scripts/basic + +# To avoid any implicit rule to kick in, define an empty command. +scripts/basic/%: scripts_basic ; + +PHONY += outputmakefile +# outputmakefile generates a Makefile in the output directory, if using a +# separate output directory. This allows convenient use of make in the +# output directory. +outputmakefile: +ifneq ($(KBUILD_SRC),) + $(Q)$(CONFIG_SHELL) $(srctree)/scripts/mkmakefile \ + $(srctree) $(objtree) $(VERSION) $(PATCHLEVEL) endif -ifneq ($(strip $(USE_SYSTEM_PWD_GRP)),true) - PWD_GRP = pwd_grp - PWD_GRP_DIR = $(BB_SRC_DIR:=/)$(PWD_GRP) - PWD_LIB = libpwd.a - PWD_CSRC=__getpwent.c pwent.c getpwnam.c getpwuid.c putpwent.c getpw.c \ - fgetpwent.c __getgrent.c grent.c getgrnam.c getgrgid.c fgetgrent.c \ - initgroups.c setgroups.c - PWD_OBJS=$(patsubst %.c,$(PWD_GRP)/%.o, $(PWD_CSRC)) -ifneq ($(strip $(BB_SRC_DIR)),) - PWD_CFLAGS = -I- -I. +# To make sure we do not include .config for any of the *config targets +# catch them early, and hand them over to scripts/kconfig/Makefile +# It is allowed to specify more targets when calling make, including +# mixing *config targets and build targets. +# For example 'make oldconfig all'. +# Detect when mixed targets is specified, and make a second invocation +# of make so .config is not included in this case either (for *config). + +no-dot-config-targets := clean mrproper distclean \ + cscope TAGS tags help %docs check% + +config-targets := 0 +mixed-targets := 0 +dot-config := 1 + +ifneq ($(filter $(no-dot-config-targets), $(MAKECMDGOALS)),) + ifeq ($(filter-out $(no-dot-config-targets), $(MAKECMDGOALS)),) + dot-config := 0 + endif endif - PWD_CFLAGS += -I$(PWD_GRP_DIR) + +ifeq ($(KBUILD_EXTMOD),) + ifneq ($(filter config %config,$(MAKECMDGOALS)),) + config-targets := 1 + ifneq ($(filter-out config %config,$(MAKECMDGOALS)),) + mixed-targets := 1 + endif + endif +endif + +ifeq ($(mixed-targets),1) +# =========================================================================== +# We're called with mixed targets (*config and build targets). +# Handle them one by one. + +%:: FORCE + $(Q)$(MAKE) -C $(srctree) KBUILD_SRC= $@ + +else +ifeq ($(config-targets),1) +# =========================================================================== +# *config targets only - make sure prerequisites are updated, and descend +# in scripts/kconfig to make the *config target + +# Read arch specific Makefile to set KBUILD_DEFCONFIG as needed. +# KBUILD_DEFCONFIG may point out an alternative default configuration +# used for 'make defconfig' +-include $(srctree)/arch/$(ARCH)/Makefile +export KBUILD_DEFCONFIG + +config %config: scripts_basic outputmakefile FORCE + $(Q)mkdir -p include + $(Q)$(MAKE) $(build)=scripts/kconfig $@ + $(Q)$(MAKE) -C $(srctree) KBUILD_SRC= .kernelrelease + +else +# =========================================================================== +# Build targets only - this includes busybox, arch specific targets, clean +# targets and others. In general all targets except *config targets. + +ifeq ($(KBUILD_EXTMOD),) +# Additional helpers built in scripts/ +# Carefully list dependencies so we do not try to build scripts twice +# in parrallel +PHONY += scripts +scripts: scripts_basic include/config/MARKER + $(Q)$(MAKE) $(build)=$(@) + +scripts_basic: include/autoconf.h + +# Objects we will link into busybox / subdirs we need to visit +core-y := \ + applets/ \ + +libs-y := \ + archival/ \ + archival/libunarchive/ \ + console-tools/ \ + coreutils/ \ + coreutils/libcoreutils/ \ + debianutils/ \ + e2fsprogs/ \ + e2fsprogs/blkid/ \ + e2fsprogs/e2p/ \ + e2fsprogs/ext2fs/ \ + e2fsprogs/uuid/ \ + editors/ \ + findutils/ \ + init/ \ + libbb/ \ + libpwdgrp/ \ + loginutils/ \ + miscutils/ \ + modutils/ \ + networking/ \ + networking/libiproute/ \ + networking/udhcp/ \ + procps/ \ + runit/ \ + shell/ \ + sysklogd/ \ + util-linux/ \ + +endif # KBUILD_EXTMOD + +ifeq ($(dot-config),1) +# In this section, we need .config + +# Read in dependencies to all Kconfig* files, make sure to run +# oldconfig if changes are detected. +-include .kconfig.d + +-include .config + +# If .config needs to be updated, it will be done via the dependency +# that autoconf has on .config. +# To avoid any implicit rule to kick in, define an empty command +.config .kconfig.d: ; + +# Now we can define CFLAGS etc according to .config +include $(srctree)/Makefile.flags + +# If .config is newer than include/autoconf.h, someone tinkered +# with it and forgot to run make oldconfig. +# If kconfig.d is missing then we are probarly in a cleaned tree so +# we execute the config step to be sure to catch updated Kconfig files +include/autoconf.h: .kconfig.d .config + $(Q)$(MAKE) -f $(srctree)/Makefile silentoldconfig + +else +# Dummy target needed, because used as prerequisite +include/autoconf.h: ; +endif + +# The all: target is the default when no target is given on the +# command line. +# This allow a user to issue only 'make' to build a kernel including modules +# Defaults busybox but it is usually overriden in the arch makefile +all: busybox + +-include $(srctree)/arch/$(ARCH)/Makefile + +# arch Makefile may override CC so keep this after arch Makefile is included +#bbox# NOSTDINC_FLAGS += -nostdinc -isystem $(shell $(CC) -print-file-name=include) +CHECKFLAGS += $(NOSTDINC_FLAGS) + +# warn about C99 declaration after statement +CFLAGS += $(call cc-option,-Wdeclaration-after-statement,) + +# disable pointer signedness warnings in gcc 4.0 +CFLAGS += $(call cc-option,-Wno-pointer-sign,) + +# Default kernel image to build when no specific target is given. +# KBUILD_IMAGE may be overruled on the commandline or +# set in the environment +# Also any assignments in arch/$(ARCH)/Makefile take precedence over +# this default value +export KBUILD_IMAGE ?= busybox + +# +# INSTALL_PATH specifies where to place the updated kernel and system map +# images. Default is /boot, but you can set it to other values +export INSTALL_PATH ?= /boot + +# +# INSTALL_MOD_PATH specifies a prefix to MODLIB for module directory +# relocations required by build roots. This is not defined in the +# makefile but the arguement can be passed to make if needed. +# + +MODLIB = $(INSTALL_MOD_PATH)/lib/modules/$(KERNELRELEASE) +export MODLIB + + +ifeq ($(KBUILD_EXTMOD),) +busybox-dirs := $(patsubst %/,%,$(filter %/, $(core-y) $(core-m) $(libs-y) $(libs-m))) + +busybox-alldirs := $(sort $(busybox-dirs) $(patsubst %/,%,$(filter %/, \ + $(core-n) $(core-) $(libs-n) $(libs-) \ + ))) + +core-y := $(patsubst %/, %/built-in.o, $(core-y)) +libs-y1 := $(patsubst %/, %/lib.a, $(libs-y)) +libs-y2 := $(patsubst %/, %/built-in.o, $(libs-y)) +libs-y := $(libs-y1) $(libs-y2) + + +# Build busybox +# --------------------------------------------------------------------------- +# busybox is build from the objects selected by $(busybox-init) and +# $(busybox-main). Most are built-in.o files from top-level directories +# in the kernel tree, others are specified in arch/$(ARCH)Makefile. +# Ordering when linking is important, and $(busybox-init) must be first. +# +# busybox +# ^ +# | +# +-< $(busybox-init) +# | +--< init/version.o + more +# | +# +--< $(busybox-main) +# | +--< driver/built-in.o mm/built-in.o + more +# | +# +-< kallsyms.o (see description in CONFIG_KALLSYMS section) +# +# busybox version (uname -v) cannot be updated during normal +# descending-into-subdirs phase since we do not yet know if we need to +# update busybox. +# Therefore this step is delayed until just before final link of busybox - +# except in the kallsyms case where it is done just before adding the +# symbols to the kernel. +# +# System.map is generated to document addresses of all kernel symbols + +busybox-all := $(core-y) $(libs-y) + +# Rule to link busybox - also used during CONFIG_KALLSYMS +# May be overridden by arch/$(ARCH)/Makefile +quiet_cmd_busybox__ ?= LINK $@ +ifdef CONFIG_STATIC + cmd_busybox__ ?= $(srctree)/scripts/trylink $(CC) \ + -static \ + -o $@ \ + -Wl,--warn-common -Wl,--sort-common -Wl,--gc-sections \ + -Wl,--start-group $(busybox-all) -Wl,--end-group else - CFLAGS += -DUSE_SYSTEM_PWD_GRP + cmd_busybox__ ?= $(srctree)/scripts/trylink $(CC) -o $@ \ + -Wl,--warn-common -Wl,--sort-common -Wl,--gc-sections \ + -Wl,--start-group $(busybox-all) -Wl,--end-group endif - -LIBBB = libbb -LIBBB_LIB = libbb.a -LIBBB_CSRC= ask_confirmation.c chomp.c concat_path_file.c copy_file.c \ -copy_file_chunk.c libc5.c device_open.c error_msg.c \ -error_msg_and_die.c fgets_str.c find_mount_point.c find_pid_by_name.c \ -find_root_device.c full_read.c full_write.c get_console.c \ -get_last_path_component.c get_line_from_file.c gz_open.c human_readable.c \ -isdirectory.c kernel_version.c loop.c mode_string.c module_syscalls.c mtab.c \ -mtab_file.c my_getgrnam.c my_getgrgid.c my_getpwnam.c my_getpwnamegid.c \ -my_getpwuid.c parse_mode.c parse_number.c perror_msg.c perror_msg_and_die.c \ -print_file.c process_escape_sequence.c read_package_field.c recursive_action.c \ -safe_read.c safe_strncpy.c syscalls.c syslog_msg_with_name.c time_string.c \ -trim.c unzip.c vdprintf.c verror_msg.c vperror_msg.c wfopen.c xfuncs.c \ -xgetcwd.c xreadlink.c xregcomp.c interface.c remove_file.c last_char_is.c \ -copyfd.c vherror_msg.c herror_msg.c herror_msg_and_die.c xgethostbyname.c \ -dirname.c make_directory.c create_icmp_socket.c u_signal_names.c arith.c -LIBBB_OBJS=$(patsubst %.c,$(LIBBB)/%.o, $(LIBBB_CSRC)) -ifeq ($(strip $(BB_SRC_DIR)),) - LIBBB_CFLAGS += -I$(LIBBB) + +# Generate System.map +quiet_cmd_sysmap = SYSMAP + cmd_sysmap = $(CONFIG_SHELL) $(srctree)/scripts/mksysmap + +# Link of busybox +# If CONFIG_KALLSYMS is set .version is already updated +# Generate System.map and verify that the content is consistent +# Use + in front of the busybox_version rule to silent warning with make -j2 +# First command is ':' to allow us to use + in front of the rule +define rule_busybox__ + : + $(call cmd,busybox__) + $(Q)echo 'cmd_$@ := $(cmd_busybox__)' > $(@D)/.$(@F).cmd +endef + + +ifdef CONFIG_KALLSYMS +# Generate section listing all symbols and add it into busybox $(kallsyms.o) +# It's a three stage process: +# o .tmp_busybox1 has all symbols and sections, but __kallsyms is +# empty +# Running kallsyms on that gives us .tmp_kallsyms1.o with +# the right size - busybox version (uname -v) is updated during this step +# o .tmp_busybox2 now has a __kallsyms section of the right size, +# but due to the added section, some addresses have shifted. +# From here, we generate a correct .tmp_kallsyms2.o +# o The correct .tmp_kallsyms2.o is linked into the final busybox. +# o Verify that the System.map from busybox matches the map from +# .tmp_busybox2, just in case we did not generate kallsyms correctly. +# o If CONFIG_KALLSYMS_EXTRA_PASS is set, do an extra pass using +# .tmp_busybox3 and .tmp_kallsyms3.o. This is only meant as a +# temporary bypass to allow the kernel to be built while the +# maintainers work out what went wrong with kallsyms. + +ifdef CONFIG_KALLSYMS_EXTRA_PASS +last_kallsyms := 3 else - LIBBB_CFLAGS = -I- -I. -I./$(LIBBB) -I$(BB_SRC_DIR)/$(LIBBB) -I$(BB_SRC_DIR) +last_kallsyms := 2 endif -LIBBB_MSRC=libbb/messages.c -LIBBB_MESSAGES= full_version name_too_long omitting_directory not_a_directory \ -memory_exhausted invalid_date invalid_option io_error dash_dash_help \ -write_error too_few_args name_longer_than_foo unknown can_not_create_raw_socket -LIBBB_MOBJ=$(patsubst %,$(LIBBB)/%.o, $(LIBBB_MESSAGES)) +kallsyms.o := .tmp_kallsyms$(last_kallsyms).o -LIBBB_ARCSRC=libbb/unarchive.c -LIBBB_ARCOBJ= archive_offset seek_sub_file extract_archive unarchive \ -get_header_ar get_header_cpio get_header_tar deb_extract -LIBBB_AROBJS=$(patsubst %,$(LIBBB)/%.o, $(LIBBB_ARCOBJ)) +define verify_kallsyms + $(Q)$(if $($(quiet)cmd_sysmap), \ + echo ' $($(quiet)cmd_sysmap) .tmp_System.map' &&) \ + $(cmd_sysmap) .tmp_busybox$(last_kallsyms) .tmp_System.map + $(Q)cmp -s System.map .tmp_System.map || \ + (echo Inconsistent kallsyms data; \ + echo Try setting CONFIG_KALLSYMS_EXTRA_PASS; \ + rm .tmp_kallsyms* ; /bin/false ) +endef +# Update busybox version before link +# Use + in front of this rule to silent warning about make -j1 +# First command is ':' to allow us to use + in front of this rule +cmd_ksym_ld = $(cmd_busybox__) +define rule_ksym_ld + : + +$(call cmd,busybox_version) + $(call cmd,busybox__) + $(Q)echo 'cmd_$@ := $(cmd_busybox__)' > $(@D)/.$(@F).cmd +endef -# Put user-supplied flags at the end, where they -# have a chance of winning. -CFLAGS += $(CFLAGS_EXTRA) +# Generate .S file with all kernel symbols +quiet_cmd_kallsyms = KSYM $@ + cmd_kallsyms = $(NM) -n $< | $(KALLSYMS) \ + $(if $(CONFIG_KALLSYMS_ALL),--all-symbols) > $@ -.EXPORT_ALL_VARIABLES: +.tmp_kallsyms1.o .tmp_kallsyms2.o .tmp_kallsyms3.o: %.o: %.S scripts FORCE + $(call if_changed_dep,as_o_S) -all: applet_source_list busybox busybox.links doc +.tmp_kallsyms%.S: .tmp_busybox% $(KALLSYMS) + $(call cmd,kallsyms) -applet_source_list: busybox.sh Config.h - (echo -n "APPLET_SOURCES := "; BB_SRC_DIR=$(BB_SRC_DIR) $(SHELL) $^) > $@ +# .tmp_busybox1 must be complete except kallsyms, so update busybox version +.tmp_busybox1: $(busybox-lds) $(busybox-all) FORCE + $(call if_changed_rule,ksym_ld) -doc: olddoc +.tmp_busybox2: $(busybox-lds) $(busybox-all) .tmp_kallsyms1.o FORCE + $(call if_changed,busybox__) -# Old Docs... -olddoc: docs/busybox.pod docs/BusyBox.txt docs/BusyBox.1 docs/BusyBox.html +.tmp_busybox3: $(busybox-lds) $(busybox-all) .tmp_kallsyms2.o FORCE + $(call if_changed,busybox__) -docs/busybox.pod : docs/busybox_header.pod usage.h docs/busybox_footer.pod - - ( cat docs/busybox_header.pod; \ - docs/autodocifier.pl usage.h; \ - cat docs/busybox_footer.pod ) > docs/busybox.pod +# Needs to visit scripts/ before $(KALLSYMS) can be used. +$(KALLSYMS): scripts ; -docs/BusyBox.txt: docs/busybox.pod - @echo - @echo BusyBox Documentation - @echo - -mkdir -p docs - -pod2text $< > $@ +# Generate some data for debugging strange kallsyms problems +debug_kallsyms: .tmp_map$(last_kallsyms) + +.tmp_map%: .tmp_busybox% FORCE + ($(OBJDUMP) -h $< | $(AWK) '/^ +[0-9]/{print $$4 " 0 " $$2}'; $(NM) $<) | sort > $@ -docs/BusyBox.1: docs/busybox.pod - - mkdir -p docs - - pod2man --center=BusyBox --release="version $(VERSION)" \ - $< > $@ +.tmp_map3: .tmp_map2 -docs/BusyBox.html: docs/busybox.lineo.com/BusyBox.html - - mkdir -p docs - -@ rm -f docs/BusyBox.html - -@ ln -s busybox.lineo.com/BusyBox.html docs/BusyBox.html +.tmp_map2: .tmp_map1 -docs/busybox.lineo.com/BusyBox.html: docs/busybox.pod - -@ mkdir -p docs/busybox.lineo.com - - pod2html --noindex $< > \ - docs/busybox.lineo.com/BusyBox.html - -@ rm -f pod2htm* +endif # ifdef CONFIG_KALLSYMS +# busybox image - including updated kernel symbols +busybox_unstripped: $(busybox-all) FORCE + $(call if_changed_rule,busybox__) + $(Q)rm -f .old_version -# New docs based on DOCBOOK SGML -newdoc: docs/busybox.txt docs/busybox.pdf docs/busybox/busyboxdocumentation.html +busybox: busybox_unstripped + $(Q)$(STRIP) -s --remove-section=.note --remove-section=.comment \ + busybox_unstripped -o $@ -docs/busybox.txt: docs/busybox.sgml +# The actual objects are generated when descending, +# make sure no implicit rule kicks in +$(sort $(busybox-all)): $(busybox-dirs) ; + +# Handle descending into subdirectories listed in $(busybox-dirs) +# Preset locale variables to speed up the build process. Limit locale +# tweaks to this spot to avoid wrong language settings when running +# make menuconfig etc. +# Error messages still appears in the original language + +PHONY += $(busybox-dirs) +$(busybox-dirs): prepare scripts + $(Q)$(MAKE) $(build)=$@ + +# Build the kernel release string +# The KERNELRELEASE is stored in a file named .kernelrelease +# to be used when executing for example make install or make modules_install +# +# Take the contents of any files called localversion* and the config +# variable CONFIG_LOCALVERSION and append them to KERNELRELEASE. +# LOCALVERSION from the command line override all of this + +nullstring := +space := $(nullstring) # end of line + +___localver = $(objtree)/localversion* $(srctree)/localversion* +__localver = $(sort $(wildcard $(___localver))) +# skip backup files (containing '~') +_localver = $(foreach f, $(__localver), $(if $(findstring ~, $(f)),,$(f))) + +localver = $(subst $(space),, \ + $(shell cat /dev/null $(_localver)) \ + $(patsubst "%",%,$(CONFIG_LOCALVERSION))) + +# If CONFIG_LOCALVERSION_AUTO is set scripts/setlocalversion is called +# and if the SCM is know a tag from the SCM is appended. +# The appended tag is determinded by the SCM used. +# +# Currently, only git is supported. +# Other SCMs can edit scripts/setlocalversion and add the appropriate +# checks as needed. +ifdef CONFIG_LOCALVERSION_AUTO + _localver-auto = $(shell $(CONFIG_SHELL) \ + $(srctree)/scripts/setlocalversion $(srctree)) + localver-auto = $(LOCALVERSION)$(_localver-auto) +endif + +localver-full = $(localver)$(localver-auto) + +# Store (new) KERNELRELASE string in .kernelrelease +kernelrelease = $(KERNELVERSION)$(localver-full) +.kernelrelease: FORCE + $(Q)rm -f $@ + $(Q)echo $(kernelrelease) > $@ + + +# Things we need to do before we recursively start building the kernel +# or the modules are listed in "prepare". +# A multi level approach is used. prepareN is processed before prepareN-1. +# archprepare is used in arch Makefiles and when processed asm symlink, +# version.h and scripts_basic is processed / created. + +# Listed in dependency order +PHONY += prepare archprepare prepare0 prepare1 prepare2 prepare3 + +# prepare-all is deprecated, use prepare as valid replacement +PHONY += prepare-all + +# prepare3 is used to check if we are building in a separate output directory, +# and if so do: +# 1) Check that make has not been executed in the kernel src $(srctree) +# 2) Create the include2 directory, used for the second asm symlink +prepare3: .kernelrelease +ifneq ($(KBUILD_SRC),) + @echo ' Using $(srctree) as source for kernel' + $(Q)if [ -f $(srctree)/.config ]; then \ + echo " $(srctree) is not clean, please run 'make mrproper'";\ + echo " in the '$(srctree)' directory.";\ + /bin/false; \ + fi; + $(Q)if [ ! -d include2 ]; then mkdir -p include2; fi; + $(Q)ln -fsn $(srctree)/include/asm-$(ARCH) include2/asm +endif + +# prepare2 creates a makefile if using a separate output directory +prepare2: prepare3 outputmakefile + +prepare1: prepare2 include/config/MARKER +ifneq ($(KBUILD_MODULES),) + $(Q)mkdir -p $(MODVERDIR) + $(Q)rm -f $(MODVERDIR)/* +endif + +archprepare: prepare1 scripts_basic + +prepare0: archprepare FORCE + $(Q)$(MAKE) $(build)=. + +# All the preparing.. +prepare prepare-all: prepare0 + +# Leave this as default for preprocessing busybox.lds.S, which is now +# done in arch/$(ARCH)/kernel/Makefile + +export CPPFLAGS_busybox.lds += -P -C -U$(ARCH) + +# FIXME: The asm symlink changes when $(ARCH) changes. That's +# hard to detect, but I suppose "make mrproper" is a good idea +# before switching between archs anyway. + +#bbox# include/asm: +#bbox# @echo ' SYMLINK $@ -> include/asm-$(ARCH)' +#bbox# $(Q)if [ ! -d include ]; then mkdir -p include; fi; +#bbox# @ln -fsn asm-$(ARCH) $@ + +# Split autoconf.h into include/linux/config/* +#bbox# piggybacked generation of few .h files +include/config/MARKER: scripts/basic/split-include include/autoconf.h + @echo ' SPLIT include/autoconf.h -> include/config/*' + @scripts/basic/split-include include/autoconf.h include/config + @echo ' GEN include/bbconfigopts.h' + @$(srctree)/scripts/mkconfigs >include/bbconfigopts.h + @touch $@ + +# Generate some files +# --------------------------------------------------------------------------- + +# KERNELRELEASE can change from a few different places, meaning version.h +# needs to be updated, so this check is forced on all builds + +uts_len := 64 + +define filechk_version.h + if [ `echo -n "$(KERNELRELEASE)" | wc -c ` -gt $(uts_len) ]; then \ + echo '"$(KERNELRELEASE)" exceeds $(uts_len) characters' >&2; \ + exit 1; \ + fi; \ + (echo \#define UTS_RELEASE \"$(KERNELRELEASE)\"; \ + echo \#define LINUX_VERSION_CODE `expr $(VERSION) \\* 65536 + $(PATCHLEVEL) \\* 256 + $(SUBLEVEL)`; \ + echo '#define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + (c))'; \ + ) +endef + +# --------------------------------------------------------------------------- + +PHONY += depend dep +depend dep: + @echo '*** Warning: make $@ is unnecessary now.' + +# --------------------------------------------------------------------------- +# Modules + +ifdef CONFIG_MODULES + +# By default, build modules as well + +all: modules + +# Build modules + +PHONY += modules +modules: $(busybox-dirs) $(if $(KBUILD_BUILTIN),busybox) + @echo ' Building modules, stage 2.'; + $(Q)$(MAKE) -rR -f $(srctree)/scripts/Makefile.modpost + + +# Target to prepare building external modules +PHONY += modules_prepare +modules_prepare: prepare scripts + +# Target to install modules +PHONY += modules_install +modules_install: _modinst_ _modinst_post + +PHONY += _modinst_ +_modinst_: + @if [ -z "`$(DEPMOD) -V 2>/dev/null | grep module-init-tools`" ]; then \ + echo "Warning: you may need to install module-init-tools"; \ + echo "See http://www.codemonkey.org.uk/docs/post-halloween-2.6.txt";\ + sleep 1; \ + fi + @rm -rf $(MODLIB)/kernel + @rm -f $(MODLIB)/source + @mkdir -p $(MODLIB)/kernel + @ln -s $(srctree) $(MODLIB)/source + @if [ ! $(objtree) -ef $(MODLIB)/build ]; then \ + rm -f $(MODLIB)/build ; \ + ln -s $(objtree) $(MODLIB)/build ; \ + fi + $(Q)$(MAKE) -rR -f $(srctree)/scripts/Makefile.modinst + +# If System.map exists, run depmod. This deliberately does not have a +# dependency on System.map since that would run the dependency tree on +# busybox. This depmod is only for convenience to give the initial +# boot a modules.dep even before / is mounted read-write. However the +# boot script depmod is the master version. +ifeq "$(strip $(INSTALL_MOD_PATH))" "" +depmod_opts := +else +depmod_opts := -b $(INSTALL_MOD_PATH) -r +endif +PHONY += _modinst_post +_modinst_post: _modinst_ + if [ -r System.map -a -x $(DEPMOD) ]; then $(DEPMOD) -ae -F System.map $(depmod_opts) $(KERNELRELEASE); fi + +else # CONFIG_MODULES + +# Modules not configured +# --------------------------------------------------------------------------- + +modules modules_install: FORCE @echo - @echo BusyBox Documentation + @echo "The present kernel configuration has modules disabled." + @echo "Type 'make config' and enable loadable module support." + @echo "Then build a kernel with module support enabled." @echo - - mkdir -p docs - (cd docs; sgmltools -b txt busybox.sgml) + @exit 1 + +endif # CONFIG_MODULES + +### +# Cleaning is done on three levels. +# make clean Delete most generated files +# Leave enough to build external modules +# make mrproper Delete the current configuration, and all generated files +# make distclean Remove editor backup files, patch leftover files and the like + +# Directories & files removed with 'make clean' +CLEAN_DIRS += $(MODVERDIR) +CLEAN_FILES += busybox* System.map \ + .tmp_kallsyms* .tmp_version .tmp_busybox* .tmp_System.map + +# Directories & files removed with 'make mrproper' +MRPROPER_DIRS += include/config include2 +MRPROPER_FILES += .config .config.old include/asm .version .old_version \ + include/autoconf.h \ + include/bbconfigopts.h \ + include/usage_compressed.h \ + .kernelrelease Module.symvers tags TAGS cscope* + +# clean - Delete most, but leave enough to build external modules +# +clean: rm-dirs := $(CLEAN_DIRS) +clean: rm-files := $(CLEAN_FILES) +clean-dirs := $(addprefix _clean_,$(srctree) $(busybox-alldirs)) + +PHONY += $(clean-dirs) clean archclean +$(clean-dirs): + $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@) + +clean: archclean $(clean-dirs) + $(call cmd,rmdirs) + $(call cmd,rmfiles) + @find . $(RCS_FIND_IGNORE) \ + \( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \ + -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \) \ + -type f -print | xargs rm -f + +# mrproper - Delete all generated files, including .config +# +mrproper: rm-dirs := $(wildcard $(MRPROPER_DIRS)) +mrproper: rm-files := $(wildcard $(MRPROPER_FILES)) +mrproper-dirs := $(addprefix _mrproper_,scripts) + +PHONY += $(mrproper-dirs) mrproper archmrproper +$(mrproper-dirs): + $(Q)$(MAKE) $(clean)=$(patsubst _mrproper_%,%,$@) -docs/busybox.dvi: docs/busybox.sgml - - mkdir -p docs - (cd docs; sgmltools -b dvi busybox.sgml) +mrproper: clean archmrproper $(mrproper-dirs) + $(call cmd,rmdirs) + $(call cmd,rmfiles) + +# distclean +# +PHONY += distclean -docs/busybox.ps: docs/busybox.sgml - - mkdir -p docs - (cd docs; sgmltools -b ps busybox.sgml) +distclean: mrproper + @find $(srctree) $(RCS_FIND_IGNORE) \ + \( -name '*.orig' -o -name '*.rej' -o -name '*~' \ + -o -name '*.bak' -o -name '#*#' -o -name '.*.orig' \ + -o -name '.*.rej' -o -size 0 \ + -o -name '*%' -o -name '.*.cmd' -o -name 'core' \) \ + -type f -print | xargs rm -f -docs/busybox.pdf: docs/busybox.ps - - mkdir -p docs - (cd docs; ps2pdf busybox.ps) -docs/busybox/busyboxdocumentation.html: docs/busybox.sgml - - mkdir -p docs - (cd docs/busybox.lineo.com; sgmltools -b html ../busybox.sgml) +# Packaging of the kernel to various formats +# --------------------------------------------------------------------------- +# rpm target kept for backward compatibility +package-dir := $(srctree)/scripts/package +%pkg: FORCE + $(Q)$(MAKE) $(build)=$(package-dir) $@ +rpm: FORCE + $(Q)$(MAKE) $(build)=$(package-dir) $@ -busybox: $(PWD_LIB) $(LIBBB_LIB) $(OBJECTS) - $(CC) $(LDFLAGS) -o $@ $(OBJECTS) $(LIBBB_LIB) $(PWD_LIB) $(LIBRARIES) - $(STRIP) -# Without VPATH, rule expands to "/bin/sh busybox.mkll Config.h applets.h" -# but with VPATH, some or all of those file names are resolved to the -# directories in which they live. -busybox.links: busybox.mkll Config.h applets.h - - $(SHELL) $^ >$@ +# Brief documentation of the typical targets used +# --------------------------------------------------------------------------- -nfsmount.o cmdedit.o: %.o: %.h -ash.o hush.o lash.o msh.o: cmdedit.h -$(OBJECTS): %.o: %.c Config.h busybox.h applets.h Makefile -ifeq ($(strip $(BB_SRC_DIR)),) - $(CC) $(CFLAGS) -I. $(patsubst %,-I%,$(subst :, ,$(BB_SRC_DIR))) -c $< -o $*.o +boards := $(wildcard $(srctree)/arch/$(ARCH)/configs/*_defconfig) +boards := $(notdir $(boards)) + +-include $(srctree)/Makefile.help + +# Documentation targets +# --------------------------------------------------------------------------- +%docs: scripts_basic FORCE + $(Q)$(MAKE) $(build)=Documentation/DocBook $@ + +else # KBUILD_EXTMOD + +### +# External module support. +# When building external modules the kernel used as basis is considered +# read-only, and no consistency checks are made and the make +# system is not used on the basis kernel. If updates are required +# in the basis kernel ordinary make commands (without M=...) must +# be used. +# +# The following are the only valid targets when building external +# modules. +# make M=dir clean Delete all automatically generated files +# make M=dir modules Make all modules in specified dir +# make M=dir Same as 'make M=dir modules' +# make M=dir modules_install +# Install the modules build in the module directory +# Assumes install directory is already created + +# We are always building modules +KBUILD_MODULES := 1 +PHONY += crmodverdir +crmodverdir: + $(Q)mkdir -p $(MODVERDIR) + $(Q)rm -f $(MODVERDIR)/* + +PHONY += $(objtree)/Module.symvers +$(objtree)/Module.symvers: + @test -e $(objtree)/Module.symvers || ( \ + echo; \ + echo " WARNING: Symbol version dump $(objtree)/Module.symvers"; \ + echo " is missing; modules will have no dependencies and modversions."; \ + echo ) + +module-dirs := $(addprefix _module_,$(KBUILD_EXTMOD)) +PHONY += $(module-dirs) modules +$(module-dirs): crmodverdir $(objtree)/Module.symvers + $(Q)$(MAKE) $(build)=$(patsubst _module_%,%,$@) + +modules: $(module-dirs) + @echo ' Building modules, stage 2.'; + $(Q)$(MAKE) -rR -f $(srctree)/scripts/Makefile.modpost + +PHONY += modules_install +modules_install: _emodinst_ _emodinst_post + +install-dir := $(if $(INSTALL_MOD_DIR),$(INSTALL_MOD_DIR),extra) +PHONY += _emodinst_ +_emodinst_: + $(Q)mkdir -p $(MODLIB)/$(install-dir) + $(Q)$(MAKE) -rR -f $(srctree)/scripts/Makefile.modinst + +# Run depmod only is we have System.map and depmod is executable +quiet_cmd_depmod = DEPMOD $(KERNELRELEASE) + cmd_depmod = if [ -r System.map -a -x $(DEPMOD) ]; then \ + $(DEPMOD) -ae -F System.map \ + $(if $(strip $(INSTALL_MOD_PATH)), \ + -b $(INSTALL_MOD_PATH) -r) \ + $(KERNELRELEASE); \ + fi + +PHONY += _emodinst_post +_emodinst_post: _emodinst_ + $(call cmd,depmod) + +clean-dirs := $(addprefix _clean_,$(KBUILD_EXTMOD)) + +PHONY += $(clean-dirs) clean +$(clean-dirs): + $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@) + +clean: rm-dirs := $(MODVERDIR) +clean: $(clean-dirs) + $(call cmd,rmdirs) + @find $(KBUILD_EXTMOD) $(RCS_FIND_IGNORE) \ + \( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \ + -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \) \ + -type f -print | xargs rm -f + +help: + @echo ' Building external modules.' + @echo ' Syntax: make -C path/to/kernel/src M=$$PWD target' + @echo '' + @echo ' modules - default target, build the module(s)' + @echo ' modules_install - install the module' + @echo ' clean - remove generated files in module directory only' + @echo '' + +# Dummies... +PHONY += prepare scripts +prepare: ; +scripts: ; +endif # KBUILD_EXTMOD + +# Generate tags for editors +# --------------------------------------------------------------------------- + +#We want __srctree to totally vanish out when KBUILD_OUTPUT is not set +#(which is the most common case IMHO) to avoid unneeded clutter in the big tags file. +#Adding $(srctree) adds about 20M on i386 to the size of the output file! + +ifeq ($(src),$(obj)) +__srctree = else - $(CC) $(CFLAGS) -I- -I. $(patsubst %,-I%,$(subst :, ,$(BB_SRC_DIR))) -c $< -o $*.o +__srctree = $(srctree)/ endif -$(PWD_OBJS): %.o: %.c Config.h busybox.h applets.h Makefile - - mkdir -p $(PWD_GRP) - $(CC) $(CFLAGS) $(PWD_CFLAGS) -c $< -o $*.o - -$(LIBBB_OBJS): %.o: %.c Config.h busybox.h applets.h Makefile libbb/libbb.h - - mkdir -p $(LIBBB) - $(CC) $(CFLAGS) $(LIBBB_CFLAGS) -c $< -o $*.o - -$(LIBBB_MOBJ): $(LIBBB_MSRC) - - mkdir -p $(LIBBB) - $(CC) $(CFLAGS) $(LIBBB_CFLAGS) -DL_$(patsubst libbb/%,%,$*) -c $< -o $*.o - -$(LIBBB_AROBJS): $(LIBBB_ARCSRC) - - mkdir -p $(LIBBB) - $(CC) $(CFLAGS) $(LIBBB_CFLAGS) -DL_$(patsubst libbb/%,%,$*) -c $< -o $*.o - -libpwd.a: $(PWD_OBJS) - $(AR) $(ARFLAGS) $@ $^ - -libbb.a: $(LIBBB_MOBJ) $(LIBBB_AROBJS) $(LIBBB_OBJS) - $(AR) $(ARFLAGS) $@ $^ - -usage.o: usage.h - -libbb/loop.o: libbb/loop.h - -libbb/loop.h: mk_loop_h.sh - @ $(SHELL) $< > $@ - -test tests: - # old way of doing it - #cd tests && $(MAKE) all - # new way of doing it - cd tests && ./tester.sh - -clean: - - cd tests && $(MAKE) clean - - rm -f docs/BusyBox.txt docs/BusyBox.1 docs/BusyBox.html \ - docs/busybox.lineo.com/BusyBox.html - - rm -f docs/busybox.txt docs/busybox.dvi docs/busybox.ps \ - docs/busybox.pdf docs/busybox.lineo.com/busybox.html - - rm -f multibuild.log Config.h.orig *.gdb *.elf - - rm -rf docs/busybox _install libpwd.a libbb.a pod2htm* - - rm -f busybox.links libbb/loop.h *~ slist.mk core applet_source_list - - find -name \*.o -exec rm -f {} \; - -distclean: clean - - rm -f busybox applet_source_list - - cd tests && $(MAKE) distclean - -install: install.sh busybox busybox.links - $(SHELL) $< $(PREFIX) - -install-hardlinks: install.sh busybox busybox.links - $(SHELL) $< $(PREFIX) --hardlinks - -debug_pristine: - @ echo VPATH=\"$(VPATH)\" - @ echo OBJECTS=\"$(OBJECTS)\" - -dist release: distclean doc - cd ..; \ - rm -rf busybox-$(VERSION); \ - cp -a busybox busybox-$(VERSION); \ - \ - find busybox-$(VERSION)/ -type d \ - -name CVS \ - -print \ - -exec rm -rf {} \; ; \ - \ - find busybox-$(VERSION)/ -type f \ - -name .\#* \ - -print \ - -exec rm -f {} \; ; \ - \ - tar -cvzf busybox-$(VERSION).tar.gz busybox-$(VERSION)/; - -.PHONY: tags -tags: - ctags -R . +ifeq ($(ALLSOURCE_ARCHS),) +ifeq ($(ARCH),um) +ALLINCLUDE_ARCHS := $(ARCH) $(SUBARCH) +else +ALLINCLUDE_ARCHS := $(ARCH) +endif +else +#Allow user to specify only ALLSOURCE_PATHS on the command line, keeping existing behaviour. +ALLINCLUDE_ARCHS := $(ALLSOURCE_ARCHS) +endif + +ALLSOURCE_ARCHS := $(ARCH) + +define all-sources + ( find $(__srctree) $(RCS_FIND_IGNORE) \ + \( -name include -o -name arch \) -prune -o \ + -name '*.[chS]' -print; \ + for ARCH in $(ALLSOURCE_ARCHS) ; do \ + find $(__srctree)arch/$${ARCH} $(RCS_FIND_IGNORE) \ + -name '*.[chS]' -print; \ + done ; \ + find $(__srctree)security/selinux/include $(RCS_FIND_IGNORE) \ + -name '*.[chS]' -print; \ + find $(__srctree)include $(RCS_FIND_IGNORE) \ + \( -name config -o -name 'asm-*' \) -prune \ + -o -name '*.[chS]' -print; \ + for ARCH in $(ALLINCLUDE_ARCHS) ; do \ + find $(__srctree)include/asm-$${ARCH} $(RCS_FIND_IGNORE) \ + -name '*.[chS]' -print; \ + done ; \ + find $(__srctree)include/asm-generic $(RCS_FIND_IGNORE) \ + -name '*.[chS]' -print ) +endef + +quiet_cmd_cscope-file = FILELST cscope.files + cmd_cscope-file = (echo \-k; echo \-q; $(all-sources)) > cscope.files + +quiet_cmd_cscope = MAKE cscope.out + cmd_cscope = cscope -b + +cscope: FORCE + $(call cmd,cscope-file) + $(call cmd,cscope) + +quiet_cmd_TAGS = MAKE $@ +define cmd_TAGS + rm -f $@; \ + ETAGSF=`etags --version | grep -i exuberant >/dev/null && \ + echo "-I __initdata,__exitdata,__acquires,__releases \ + -I EXPORT_SYMBOL,EXPORT_SYMBOL_GPL \ + --extra=+f --c-kinds=+px"`; \ + $(all-sources) | xargs etags $$ETAGSF -a +endef + +TAGS: FORCE + $(call cmd,TAGS) + + +quiet_cmd_tags = MAKE $@ +define cmd_tags + rm -f $@; \ + CTAGSF=`ctags --version | grep -i exuberant >/dev/null && \ + echo "-I __initdata,__exitdata,__acquires,__releases \ + -I EXPORT_SYMBOL,EXPORT_SYMBOL_GPL \ + --extra=+f --c-kinds=+px"`; \ + $(all-sources) | xargs ctags $$CTAGSF -a +endef + +tags: FORCE + $(call cmd,tags) + + +# Scripts to check various things for consistency +# --------------------------------------------------------------------------- + +includecheck: + find * $(RCS_FIND_IGNORE) \ + -name '*.[hcS]' -type f -print | sort \ + | xargs $(PERL) -w scripts/checkincludes.pl + +versioncheck: + find * $(RCS_FIND_IGNORE) \ + -name '*.[hcS]' -type f -print | sort \ + | xargs $(PERL) -w scripts/checkversion.pl + +namespacecheck: + $(PERL) $(srctree)/scripts/namespace.pl + +endif #ifeq ($(config-targets),1) +endif #ifeq ($(mixed-targets),1) + +PHONY += checkstack +checkstack: + $(OBJDUMP) -d busybox $$(find . -name '*.ko') | \ + $(PERL) $(src)/scripts/checkstack.pl $(ARCH) + +kernelrelease: + $(if $(wildcard .kernelrelease), $(Q)echo $(KERNELRELEASE), \ + $(error kernelrelease not valid - run 'make *config' to update it)) +kernelversion: + @echo $(KERNELVERSION) + +# Single targets +# --------------------------------------------------------------------------- +# Single targets are compatible with: +# - build whith mixed source and output +# - build with separate output dir 'make O=...' +# - external modules +# +# target-dir => where to store outputfile +# build-dir => directory in kernel source tree to use + +ifeq ($(KBUILD_EXTMOD),) + build-dir = $(patsubst %/,%,$(dir $@)) + target-dir = $(dir $@) +else + zap-slash=$(filter-out .,$(patsubst %/,%,$(dir $@))) + build-dir = $(KBUILD_EXTMOD)$(if $(zap-slash),/$(zap-slash)) + target-dir = $(if $(KBUILD_EXTMOD),$(dir $<),$(dir $@)) +endif + +%.s: %.c prepare scripts FORCE + $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) +%.i: %.c prepare scripts FORCE + $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) +%.o: %.c prepare scripts FORCE + $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) +%.lst: %.c prepare scripts FORCE + $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) +%.s: %.S prepare scripts FORCE + $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) +%.o: %.S prepare scripts FORCE + $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) + +# Modules +/ %/: prepare scripts FORCE + $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \ + $(build)=$(build-dir) +%.ko: prepare scripts FORCE + $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \ + $(build)=$(build-dir) $(@:.ko=.o) + $(Q)$(MAKE) -rR -f $(srctree)/scripts/Makefile.modpost + +# FIXME Should go into a make.lib or something +# =========================================================================== + +quiet_cmd_rmdirs = $(if $(wildcard $(rm-dirs)),CLEAN $(wildcard $(rm-dirs))) + cmd_rmdirs = rm -rf $(rm-dirs) + +quiet_cmd_rmfiles = $(if $(wildcard $(rm-files)),CLEAN $(wildcard $(rm-files))) + cmd_rmfiles = rm -f $(rm-files) + + +a_flags = -Wp,-MD,$(depfile) $(AFLAGS) $(AFLAGS_KERNEL) \ + $(NOSTDINC_FLAGS) $(CPPFLAGS) \ + $(modkern_aflags) $(EXTRA_AFLAGS) $(AFLAGS_$(*F).o) + +quiet_cmd_as_o_S = AS $@ +cmd_as_o_S = $(CC) $(a_flags) -c -o $@ $< + +# read all saved command lines + +targets := $(wildcard $(sort $(targets))) +cmd_files := $(wildcard .*.cmd $(foreach f,$(targets),$(dir $(f)).$(notdir $(f)).cmd)) + +ifneq ($(cmd_files),) + $(cmd_files): ; # Do not try to update included dependency files + include $(cmd_files) +endif + +# Shorthand for $(Q)$(MAKE) -f scripts/Makefile.clean obj=dir +# Usage: +# $(Q)$(MAKE) $(clean)=dir +clean := -f $(if $(KBUILD_SRC),$(srctree)/)scripts/Makefile.clean obj + +endif # skip-makefile + +PHONY += FORCE +FORCE: + +-include $(srctree)/Makefile.custom + +# Declare the contents of the .PHONY variable as phony. We keep that +# information in a variable se we can use it in if_changed and friends. +.PHONY: $(PHONY)