| # Rules.make for busybox |
| # |
| # Copyright (C) 1999-2005 by Erik Andersen <andersen@codepoet.org> |
| # |
| # 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 $(top_builddir)/.config |
| endif |
| |
| #-------------------------------------------------------- |
| PROG := busybox |
| MAJOR_VERSION :=1 |
| MINOR_VERSION :=1 |
| SUBLEVEL_VERSION:=1 |
| EXTRAVERSION :=-pre0 |
| VERSION :=$(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 |
| # MAKEFILES = $(top_builddir)/.config |
| RM = rm |
| RM_F = $(RM) -f |
| LN = ln |
| LN_S = $(LN) -s |
| MKDIR = mkdir |
| MKDIR_P = $(MKDIR) -p |
| MV = mv |
| CP = cp |
| |
| |
| # What OS are you compiling busybox for? This allows you to include |
| # OS specific things, syscall overrides, etc. |
| TARGET_OS=linux |
| |
| # Select the compiler needed to build binaries for your development system |
| HOSTCC = gcc |
| HOSTCFLAGS= -Wall -Wstrict-prototypes -O2 -fomit-frame-pointer |
| |
| # Ensure consistent sort order, 'gcc -print-search-dirs' behavior, etc. |
| LC_ALL:= C |
| |
| # If you want to add some simple compiler switches (like -march=i686), |
| # especially from the command line, use this instead of CFLAGS directly. |
| # For optimization overrides, it's better still to set OPTIMIZATION. |
| CFLAGS_EXTRA=$(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 -I$(srcdir) |
| |
| ARFLAGS=cru |
| |
| |
| # gcc centric. Perhaps fiddle with findstring gcc,$(CC) for the rest |
| # get the CC MAJOR/MINOR version |
| CC_MAJOR:=$(shell printf "%02d" $(shell echo __GNUC__ | $(CC) -E -xc - | tail -n 1)) |
| CC_MINOR:=$(shell printf "%02d" $(shell echo __GNUC_MINOR__ | $(CC) -E -xc - | tail -n 1)) |
| |
| #-------------------------------------------------------- |
| export VERSION BUILDTIME HOSTCC HOSTCFLAGS CROSS CC AR AS LD NM STRIP CPP |
| ifeq ($(strip $(TARGET_ARCH)),) |
| TARGET_ARCH:=$(shell $(CC) -dumpmachine | sed -e s'/-.*//' \ |
| -e 's/i.86/i386/' \ |
| -e 's/sparc.*/sparc/' \ |
| -e 's/arm.*/arm/g' \ |
| -e 's/m68k.*/m68k/' \ |
| -e 's/ppc/powerpc/g' \ |
| -e 's/v850.*/v850/g' \ |
| -e 's/sh[234]/sh/' \ |
| -e 's/mips-.*/mips/' \ |
| -e 's/mipsel-.*/mipsel/' \ |
| -e 's/cris.*/cris/' \ |
| ) |
| endif |
| |
| # A nifty macro to make testing gcc features easier |
| check_gcc=$(shell \ |
| if [ "$(1)" != "" ]; then \ |
| if $(CC) $(1) -S -o /dev/null -xc /dev/null > /dev/null 2>&1; \ |
| then echo "$(1)"; else echo "$(2)"; fi \ |
| fi) |
| |
| # A not very robust macro to check for available ld flags |
| check_ld=$(shell \ |
| if [ "x$(1)" != "x" ]; then \ |
| $(LD) --help | grep -q "\$(1)" && echo "-Wl,$(1)" ; \ |
| fi) |
| |
| CFLAGS+=$(call check_gcc,-funsigned-char,) |
| |
| CFLAGS+=$(call check_gcc,-mmax-stack-frame=256,) |
| |
| #-------------------------------------------------------- |
| # Arch specific compiler optimization stuff should go here. |
| # Unless you want to override the defaults, do not set anything |
| # for OPTIMIZATION... |
| |
| # use '-Os' optimization if available, else use -O2 |
| OPTIMIZATION:=$(call check_gcc,-Os,-O2) |
| |
| ifeq ($(CONFIG_BUILD_AT_ONCE),y) |
| # gcc 2.95 exits with 0 for "unrecognized option" |
| ifeq ($(strip $(shell [ $(CC_MAJOR) -ge 3 ] ; echo $$?)),0) |
| OPTIMIZATION+=$(call check_gcc,--combine,) |
| endif |
| OPTIMIZATION+=$(call check_gcc,-funit-at-a-time,) |
| PROG_CFLAGS+=$(call check_gcc,-fwhole-program,) |
| endif # CONFIG_BUILD_AT_ONCE |
| |
| LIB_LDFLAGS:=$(call check_ld,--enable-new-dtags,) |
| #LIB_LDFLAGS+=$(call check_ld,--reduce-memory-overheads,) |
| #LIB_LDFLAGS+=$(call check_ld,--as-needed,) |
| #LIB_LDFLAGS+=$(call check_ld,--warn-shared-textrel,) |
| |
| |
| # Some nice architecture specific optimizations |
| ifeq ($(strip $(TARGET_ARCH)),arm) |
| OPTIMIZATION+=-fstrict-aliasing |
| endif |
| ifeq ($(strip $(TARGET_ARCH)),i386) |
| OPTIMIZATION+=$(call check_gcc,-march=i386,) |
| # gcc-4.0 and older seem to suffer from these |
| ifneq ($(strip $(shell [ $(CC_MAJOR) -ge 4 -a $(CC_MINOR) -ge 1 ] ; echo $$?)),0) |
| OPTIMIZATION+=$(call check_gcc,-mpreferred-stack-boundary=2,) |
| OPTIMIZATION+=$(call check_gcc,-falign-functions=0 -falign-jumps=0 -falign-loops=0,\ |
| -malign-functions=0 -malign-jumps=0 -malign-loops=0) |
| endif # gcc-4.0 and older |
| |
| # gcc-4.1 and beyond seem to benefit from these |
| ifeq ($(strip $(shell [ $(CC_MAJOR) -ge 4 -a $(CC_MINOR) -ge 1 ] ; echo $$?)),0) |
| # turn off flags which hurt -Os |
| OPTIMIZATION+=$(call check_gcc,-fno-tree-loop-optimize,) |
| OPTIMIZATION+=$(call check_gcc,-fno-tree-dominator-opts,) |
| OPTIMIZATION+=$(call check_gcc,-fno-strength-reduce,) |
| |
| OPTIMIZATION+=$(call check_gcc,-fno-branch-count-reg,) |
| endif # gcc-4.1 and beyond |
| endif |
| OPTIMIZATIONS:=$(OPTIMIZATION) $(call check_gcc,-fomit-frame-pointer,) |
| |
| # |
| #-------------------------------------------------------- |
| # If you're going to do a lot of builds with a non-vanilla configuration, |
| # it makes sense to adjust parameters above, so you can type "make" |
| # by itself, instead of following it by the same half-dozen overrides |
| # every time. The stuff below, on the other hand, is probably less |
| # prone to casual user adjustment. |
| # |
| |
| ifeq ($(strip $(CONFIG_LFS)),y) |
| # For large file summit support |
| CFLAGS+=-D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE -D_FILE_OFFSET_BITS=64 |
| endif |
| ifeq ($(strip $(CONFIG_DMALLOC)),y) |
| # For testing mem leaks with dmalloc |
| CFLAGS+=-DDMALLOC |
| LIBRARIES:=-ldmalloc |
| else |
| ifeq ($(strip $(CONFIG_EFENCE)),y) |
| LIBRARIES:=-lefence |
| endif |
| endif |
| ifeq ($(strip $(CONFIG_DEBUG)),y) |
| CFLAGS +=$(WARNINGS) -g -D_GNU_SOURCE |
| LDFLAGS += $(call check_ld,--warn-common,) |
| STRIPCMD:=/bin/true -Not_stripping_since_we_are_debugging |
| else |
| CFLAGS+=$(WARNINGS) $(OPTIMIZATIONS) -D_GNU_SOURCE -DNDEBUG |
| LDFLAGS += $(call check_ld,--warn-common,) |
| LDFLAGS += $(call check_ld,--sort-common,) |
| STRIPCMD:=$(STRIP) -s --remove-section=.note --remove-section=.comment |
| endif |
| ifeq ($(strip $(CONFIG_STATIC)),y) |
| PROG_CFLAGS += $(call check_gcc,-static,) |
| endif |
| CFLAGS_SHARED += $(call check_gcc,-shared,) |
| LIB_CFLAGS+=$(CFLAGS_SHARED) |
| |
| ifeq ($(strip $(CONFIG_BUILD_LIBBUSYBOX)),y) |
| CFLAGS_PIC:= $(call check_gcc,-fPIC,) |
| endif |
| |
| ifeq ($(strip $(CONFIG_SELINUX)),y) |
| LIBRARIES += -lselinux |
| endif |
| |
| ifeq ($(strip $(PREFIX)),) |
| PREFIX:=`pwd`/_install |
| endif |
| |
| # Additional complications due to support for pristine source dir. |
| # Include files in the build directory should take precedence over |
| # the copy in top_srcdir, both during the compilation phase and the |
| # shell script that finds the list of object files. |
| # Work in progress by <ldoolitt@recycle.lbl.gov>. |
| |
| |
| OBJECTS:=$(APPLET_SOURCES:.c=.o) busybox.o usage.o applets.o |
| 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 $(CONFIG_INSTALL_APPLET_DONT)),y) |
| INSTALL_OPTS= |
| endif |
| |
| #------------------------------------------------------------ |
| # Make the output nice and tight |
| MAKEFLAGS += --no-print-directory |
| export MAKE_IS_SILENT=n |
| ifneq ($(findstring s,$(MAKEFLAGS)),) |
| export MAKE_IS_SILENT=y |
| SECHO := @-false |
| DISP := sil |
| Q := @ |
| else |
| ifneq ($(V)$(VERBOSE),) |
| SECHO := @-false |
| DISP := ver |
| Q := |
| else |
| SECHO := @echo |
| DISP := pur |
| Q := @ |
| endif |
| endif |
| |
| show_objs = $(subst $(top_builddir)/,,$(subst ../,,$@)) |
| 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_ar = echo " "AR $(ARFLAGS) $(show_objs) |
| sil_disp_compile.c = true |
| sil_disp_compile.h = true |
| sil_disp_strip = true |
| sil_disp_link = true |
| sil_disp_ar = true |
| ver_disp_compile.c = echo $(cmd_compile.c) |
| ver_disp_compile.h = echo $(cmd_compile.h) |
| ver_disp_strip = echo $(cmd_strip) |
| ver_disp_link = echo $(cmd_link) |
| ver_disp_ar = echo $(cmd_ar) |
| 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_ar = $($(DISP)_disp_ar) |
| disp_gen = $(SECHO) " "GEN $@ ; true |
| disp_doc = $(SECHO) " "DOC $(subst docs/,,$@) ; true |
| cmd_compile.c = $(CC) $(CFLAGS) $(EXTRA_CFLAGS) -c -o $@ $< |
| cmd_compile.h = $(HOSTCC) $(HOSTCFLAGS) -c -o $@ $< |
| cmd_strip = $(STRIPCMD) $@ |
| cmd_link = $(CC) $(CFLAGS) $(EXTRA_CFLAGS) $(LDFLAGS) |
| cmd_ar = $(AR) $(ARFLAGS) $@ $^ |
| compile.c = @$(disp_compile.c) ; $(cmd_compile.c) |
| compile.h = @$(disp_compile.h) ; $(cmd_compile.h) |
| do_strip = @$(disp_strip) ; $(cmd_strip) |
| do_link = @$(disp_link) ; $(cmd_link) |
| do_ar = @$(disp_ar) ; $(cmd_ar) |
| |
| .PHONY: dummy |