# Rules.make for busybox # # Copyright (C) 1999-2005 by Erik Andersen # # Licensed under GPLv2, see the file LICENSE in this tarball for details. # # Pull in the user's busybox configuration ifeq ($(filter $(noconfig_targets),$(MAKECMDGOALS)),) -include $(top_builddir)/.config endif ifeq ($(MAKELEVEL),0) ifeq ($(HAVE_DOT_CONFIG),y) rules-mak-rules:=0 endif endif #-------------------------------------------------------- PROG := busybox MAJOR_VERSION :=1 MINOR_VERSION :=1 SUBLEVEL_VERSION:=1 EXTRAVERSION :=-pre0 VERSION :=$(MAJOR_VERSION).$(MINOR_VERSION).$(SUBLEVEL_VERSION)$(EXTRAVERSION) BUILDTIME := $(shell TZ=UTC date -u "+%Y.%m.%d-%H:%M%z") #-------------------------------------------------------- # With a modern GNU make(1) (highly recommended, that's what all the # developers use), all of the following configuration values can be # overridden at the command line. For example: # make CROSS=powerpc-linux- top_srcdir="$HOME/busybox" PREFIX=/mnt/app #-------------------------------------------------------- # If you are running a cross compiler, you will want to set 'CROSS' # to something more interesting... Target architecture is determined # by asking the CC compiler what arch it compiles things for, so unless # your compiler is broken, you should not need to specify __TARGET_ARCH CROSS =$(subst ",, $(strip $(CROSS_COMPILER_PREFIX))) #") CC = $(CROSS)gcc AR = $(CROSS)ar AS = $(CROSS)as LD = $(CROSS)ld NM = $(CROSS)nm STRIP = $(CROSS)strip CPP = $(CC) -E SED ?= sed AWK ?= awk ifdef PACKAGE_BE_VERBOSE PACKAGE_BE_VERBOSE := $(shell echo $(PACKAGE_BE_VERBOSE) | $(SED) "s/[[:alpha:]]*//g") endif # for make V=3 and above make $(shell) invocations verbose ifeq ($(if $(strip $(PACKAGE_BE_VERBOSE)),$(shell test $(PACKAGE_BE_VERBOSE) -gt 2 ; echo $$?),1),0) SHELL+=-x MKDEP_ARGS:=-w endif # What OS are you compiling busybox for? This allows you to include # OS specific things, syscall overrides, etc. TARGET_OS=linux # Select the compiler needed to build binaries for your development system HOSTCC = gcc HOSTCFLAGS= -Wall -Wstrict-prototypes -O2 -fomit-frame-pointer # Ensure consistent sort order, 'gcc -print-search-dirs' behavior, etc. LC_ALL:= C # 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 OPTIMIZATIONS. CFLAGS_EXTRA=$(subst ",, $(strip $(EXTRA_CFLAGS_OPTIONS))) #") # To compile vs some other alternative libc, you may need to use/adjust # the following lines to meet your needs... # # If you are using Red Hat 6.x with the compatible RPMs (for developing under # Red Hat 5.x and glibc 2.0) uncomment the following. Be sure to read about # using the compatible RPMs (compat-*) at http://www.redhat.com ! #LIBCDIR:=/usr/i386-glibc20-linux # # For other libraries, you are on your own. But these may (or may not) help... #LDFLAGS+=-nostdlib #LIBRARIES:=$(LIBCDIR)/lib/libc.a -lgcc #CROSS_CFLAGS+=-nostdinc -I$(LIBCDIR)/include -I$(GCCINCDIR) -funsigned-char #GCCINCDIR:=$(shell gcc -print-search-dirs | sed -ne "s/install: \(.*\)/\1include/gp") WARNINGS=-Wall -Wstrict-prototypes -Wshadow CFLAGS+=-I$(top_builddir)/include -I$(top_srcdir)/include ARFLAGS=cru # Get the CC MAJOR/MINOR version # gcc centric. Perhaps fiddle with findstring gcc,$(CC) for the rest CC_MAJOR:=$(shell printf "%02d" $(shell echo __GNUC__ | $(CC) -E -xc - | tail -n 1)) CC_MINOR:=$(shell printf "%02d" $(shell echo __GNUC_MINOR__ | $(CC) -E -xc - | tail -n 1)) # Note: spaces are significant here! # Check if CC version is equal to given MAJOR,MINOR. Returns empty if false. define cc_eq $(shell [ $(CC_MAJOR) -eq $(1) -a $(CC_MINOR) -eq $(2) ] && echo y) endef # Check if CC version is greater or equal than given MAJOR,MINOR define cc_ge $(shell [ $(CC_MAJOR) -ge $(1) -a $(CC_MINOR) -ge $(2) ] && echo y) endef # Check if CC version is less or equal than given MAJOR,MINOR define cc_le $(shell [ $(CC_MAJOR) -le $(1) -a $(CC_MINOR) -le $(2) ] && echo y) endef # Workaround bugs in make-3.80 for eval in conditionals define is_eq $(shell [ $(1) = $(2) ] 2> /dev/null && echo y) endef define is_neq $(shell [ $(1) != $(2) ] 2> /dev/null && echo y) endef #-------------------------------------------------------- export VERSION BUILDTIME HOSTCC HOSTCFLAGS CROSS CC AR AS LD NM STRIP CPP # TARGET_ARCH and TARGET_MACH will be passed verbatim to CC with recent # versions of make, so we use __TARGET_ARCH here. # Current builtin rules looks like that: # COMPILE.s = $(AS) $(ASFLAGS) $(TARGET_MACH) # COMPILE.c = $(CC) $(CFLAGS) $(CPPFLAGS) $(TARGET_ARCH) -c ifeq ($(strip $(__TARGET_ARCH)),) __TARGET_ARCH:=$(shell $(CC) -dumpmachine | sed -e s'/-.*//' \ -e 's/i.86/i386/' \ -e 's/sparc.*/sparc/' \ -e 's/arm.*/arm/g' \ -e 's/m68k.*/m68k/' \ -e 's/ppc/powerpc/g' \ -e 's/v850.*/v850/g' \ -e 's/sh[234]/sh/' \ -e 's/mips-.*/mips/' \ -e 's/mipsel-.*/mipsel/' \ -e 's/cris.*/cris/' \ ) endif $(call check_gcc,CFLAGS,-funsigned-char,) $(call check_gcc,CFLAGS,-mmax-stack-frame=256,) #-------------------------------------------------------- # Arch specific compiler optimization stuff should go here. # Unless you want to override the defaults, do not set anything # for OPTIMIZATIONS... # use '-Os' optimization if available, else use -O2 $(call check_gcc,OPTIMIZATIONS,-Os,-O2) # gcc 2.95 exits with 0 for "unrecognized option" $(if $(call is_eq,$(CONFIG_BUILD_AT_ONCE),y),\ $(if $(call cc_ge,3,0),\ $(call check_gcc,CFLAGS_COMBINE,--combine,))) $(if $(call is_eq,$(CONFIG_BUILD_AT_ONCE),y),\ $(call check_gcc,OPTIMIZATIONS,-funit-at-a-time,)) # http://gcc.gnu.org/bugzilla/show_bug.cgi?id=25795 #$(if $(call is_eq,$(CONFIG_BUILD_AT_ONCE),y),\ # $(call check_gcc,PROG_CFLAGS,-fwhole-program,)) $(call check_ld,LIB_LDFLAGS,--enable-new-dtags,) #$(call check_ld,LIB_LDFLAGS,--reduce-memory-overheads,) #$(call check_ld,LIB_LDFLAGS,--as-needed,) #$(call check_ld,LIB_LDFLAGS,--warn-shared-textrel,) $(call check_ld,PROG_LDFLAGS,--gc-sections,) # Some nice architecture specific optimizations ifeq ($(__TARGET_ARCH),arm) OPTIMIZATIONS+=-fstrict-aliasing endif # arm $(if $(call is_eq,$(__TARGET_ARCH),i386),\ $(call check_gcc,OPTIMIZATIONS,-march=i386,)) # gcc-4.0 and older seem to suffer from these $(if $(call cc_le,4,0),\ $(call check_gcc,OPTIMIZATIONS,-mpreferred-stack-boundary=2,)\ $(call check_gcc,OPTIMIZATIONS,-falign-functions=0 -falign-jumps=0 -falign-loops=0,\ -malign-functions=0 -malign-jumps=0 -malign-loops=0)) # gcc-4.1 and beyond seem to benefit from these # turn off flags which hurt -Os $(if $(call cc_ge,4,1),\ $(call check_gcc,OPTIMIZATIONS,-fno-tree-loop-optimize,)\ $(call check_gcc,OPTIMIZATIONS,-fno-tree-dominator-opts,)\ $(call check_gcc,OPTIMIZATIONS,-fno-strength-reduce,)\ \ $(call check_gcc,OPTIMIZATIONS,-fno-branch-count-reg,)) $(call check_gcc,OPTIMIZATIONS,-fomit-frame-pointer,) # #-------------------------------------------------------- # If you're going to do a lot of builds with a non-vanilla configuration, # it makes sense to adjust parameters above, so you can type "make" # by itself, instead of following it by the same half-dozen overrides # every time. The stuff below, on the other hand, is probably less # prone to casual user adjustment. # ifeq ($(CONFIG_LFS),y) # For large file summit support CFLAGS+=-D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE -D_FILE_OFFSET_BITS=64 endif ifeq ($(CONFIG_DMALLOC),y) # For testing mem leaks with dmalloc CFLAGS+=-DDMALLOC LIBRARIES:=-ldmalloc else ifeq ($(CONFIG_EFENCE),y) LIBRARIES:=-lefence endif endif $(if $(call is_eq,$(CONFIG_DEBUG),y),\ $(call check_ld,LDFLAGS,--warn-common,),\ $(call check_ld,LDFLAGS,--warn-common,)$(call check_ld,LDFLAGS,--sort-common,)) ifeq ($(CONFIG_DEBUG),y) CFLAGS +=$(WARNINGS) -g -D_GNU_SOURCE STRIPCMD:=/bin/true -Not_stripping_since_we_are_debugging else CFLAGS+=$(WARNINGS) $(OPTIMIZATIONS) -D_GNU_SOURCE -DNDEBUG STRIPCMD:=$(STRIP) -s --remove-section=.note --remove-section=.comment endif $(if $(call is_eq,$(CONFIG_STATIC),y),\ $(call check_gcc,PROG_CFLAGS,-static,)) $(call check_gcc,CFLAGS_SHARED,-shared,) LIB_CFLAGS+=$(CFLAGS_SHARED) $(if $(call is_eq,$(CONFIG_BUILD_LIBBUSYBOX),y),\ $(call check_gcc,CFLAGS_PIC,-fPIC,)) ifeq ($(CONFIG_SELINUX),y) LIBRARIES += -lselinux endif ifeq ($(strip $(PREFIX)),) PREFIX:=`pwd`/_install endif CFLAGS += $(CROSS_CFLAGS) ifdef BB_INIT_SCRIPT CFLAGS += -DINIT_SCRIPT='"$(BB_INIT_SCRIPT)"' endif # Put user-supplied flags at the end, where they # have a chance of winning. CFLAGS += $(CFLAGS_EXTRA) #------------------------------------------------------------ # Installation options ifeq ($(strip $(CONFIG_INSTALL_APPLET_HARDLINKS)),y) INSTALL_OPTS=--hardlinks endif ifeq ($(strip $(CONFIG_INSTALL_APPLET_SYMLINKS)),y) INSTALL_OPTS=--symlinks endif ifeq ($(strip $(CONFIG_INSTALL_APPLET_DONT)),y) INSTALL_OPTS= endif #------------------------------------------------------------ # object extensions # object potentially used in shared object ifeq ($(strip $(CONFIG_BUILD_LIBBUSYBOX)),y) # single-object extension os:=.os # multi-object extension om:=.osm else os:=.o om:=.om endif #------------------------------------------------------------ # Make the output nice and tight # for make V=2 and above, do print directory ifneq ($(shell test -n "$(strip $(PACKAGE_BE_VERBOSE))" && test $(PACKAGE_BE_VERBOSE) -gt 1 ; echo $$?),0) MAKEFLAGS += --no-print-directory endif export MAKEOVERRIDES export MAKE_IS_SILENT=n ifneq ($(findstring s,$(MAKEFLAGS)),) export MAKE_IS_SILENT=y DISP := sil Q := @ else ifneq ($(V)$(VERBOSE),) DISP := ver Q := else DISP := pur Q := @ endif endif define show_objs $(subst $(top_builddir)/,,$(subst ../,,$@)) endef pur_disp_compile.c = @echo " "CC $(show_objs) ; pur_disp_compile.h = @echo " "HOSTCC $(show_objs) ; pur_disp_strip = @echo " "STRIP $(show_objs) ; pur_disp_link = @echo " "LINK $(show_objs) ; pur_disp_link.h = @echo " "HOSTLINK $(show_objs) ; pur_disp_ar = @echo " "AR $(ARFLAGS) $(show_objs) ; pur_disp_gen = @echo " "GEN $@ ; pur_disp_doc = @echo " "DOC $(subst docs/,,$@) ; pur_disp_bin = @echo " "BIN $(show_objs) ; sil_disp_compile.c = @ sil_disp_compile.h = @ sil_disp_strip = @ sil_disp_link = @ sil_disp_link.h = @ sil_disp_ar = @ sil_disp_gen = @ sil_disp_doc = @ sil_disp_bin = @ ver_disp_compile.c = ver_disp_compile.h = ver_disp_strip = ver_disp_link = ver_disp_link.h = ver_disp_ar = ver_disp_gen = ver_disp_doc = ver_disp_bin = disp_compile.c = $($(DISP)_disp_compile.c) disp_compile.h = $($(DISP)_disp_compile.h) disp_strip = $($(DISP)_disp_strip) disp_link = $($(DISP)_disp_link) disp_link.h = $($(DISP)_disp_link.h) disp_ar = $($(DISP)_disp_ar) disp_gen = $($(DISP)_disp_gen) disp_doc = $($(DISP)_disp_doc) disp_bin = $($(DISP)_disp_bin) # CFLAGS-dir == $(CFLAGS-$(notdir $(@D))) # CFLAGS-dir-file.o == $(CFLAGS-$(notdir $(@D))-$(notdir $(@F))) # CFLAGS-dir-file.c == $(CFLAGS-$(notdir $(