| # 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 $(top_builddir)/.config |
| endif |
| |
| #-------------------------------------------------------- |
| PROG := busybox |
| MAJOR_VERSION :=1 |
| MINOR_VERSION :=2 |
| SUBLEVEL_VERSION:=0 |
| EXTRAVERSION := |
| VERSION :=$(MAJOR_VERSION).$(MINOR_VERSION).$(SUBLEVEL_VERSION)$(EXTRAVERSION) |
| BUILDTIME := $(shell TZ=UTC date -u "+%Y.%m.%d-%H:%M%z") |
| |
| |
| #-------------------------------------------------------- |
| # With a modern GNU make(1) (highly recommended, that's what all the |
| # developers use), all of the following configuration values can be |
| # overridden at the command line. For example: |
| # make CROSS_COMPILE=powerpc-linux- top_srcdir="$HOME/busybox" PREFIX=/mnt/app |
| #-------------------------------------------------------- |
| |
| # If you are running a cross compiler, you will want to set CROSS_COMPILE |
| # 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 |
| CC = $(CROSS_COMPILE)gcc |
| AR = $(CROSS_COMPILE)ar |
| AS = $(CROSS_COMPILE)as |
| LD = $(CROSS_COMPILE)ld |
| NM = $(CROSS_COMPILE)nm |
| STRIP = $(CROSS_COMPILE)strip |
| ELF2FLT = $(CROSS_COMPILE)elf2flt |
| CPP = $(CC) -E |
| SED ?= sed |
| BZIP2 ?= bzip2 |
| |
| |
| # What OS are you compiling busybox for? This allows you to include |
| # OS specific things, syscall overrides, etc. |
| TARGET_OS=linux |
| |
| # Ensure consistent sort order, 'gcc -print-search-dirs' behavior, etc. |
| LC_ALL:= C |
| |
| # This must bind late because srcdir is reset for every source subdirectory. |
| INCS:=-I$(top_builddir)/include -I$(top_srcdir)/include |
| CFLAGS=$(INCS) -I$(srcdir) -D_GNU_SOURCE |
| CFLAGS+=$(CHECKED_CFLAGS) |
| 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__ | $(CC) -E -xc - | tail -n 1)) |
| |
| #-------------------------------------------------------- |
| export VERSION BUILDTIME HOSTCC HOSTCFLAGS CROSS_COMPILE CC AR AS LD NM STRIP CPP |
| ifeq ($(strip $(TARGET_ARCH)),) |
| TARGET_ARCH:=$(shell $(CC) -dumpmachine | $(SED) -e s'/-.*//' \ |
| -e 's/i.86/i386/' \ |
| -e 's/sparc.*/sparc/' \ |
| -e 's/arm.*/arm/g' \ |
| -e 's/m68k.*/m68k/' \ |
| -e 's/ppc/powerpc/g' \ |
| -e 's/v850.*/v850/g' \ |
| -e 's/sh[234]/sh/' \ |
| -e 's/mips-.*/mips/' \ |
| -e 's/mipsel-.*/mipsel/' \ |
| -e 's/cris.*/cris/' \ |
| ) |
| endif |
| |
| # A nifty macro to make testing gcc features easier, but note that everything |
| # that uses this _must_ use := or it will be re-evaluated everytime it is |
| # referenced. |
| ifeq ($(strip $(BUILD_VERBOSE)),2) |
| VERBOSE_CHECK_CC=echo CC=\"$(1)\" check_cc $(2) >&2; |
| endif |
| check_cc=$(shell \ |
| $(VERBOSE_CHECK_CC) \ |
| if [ "x$(1)" != "x" ] && [ "x$(2)" != "x" ]; then \ |
| echo "int i;" > ./conftest.c; \ |
| if $(1) $(2) -c -o conftest.o conftest.c > /dev/null 2>&1; \ |
| then echo "$(2)"; else echo "$(3)"; fi ; \ |
| rm -f conftest.c conftest.o; \ |
| fi) |
| |
| ifneq ($(filter $(nocheck_targets),$(MAKECMDGOALS)),) |
| check_cc:= |
| endif |
| |
| # A not very robust macro to check for available ld flags |
| ifeq ($(strip $(BUILD_VERBOSE)),2) |
| VERBOSE_CHECK_LD=echo LD=\"$(1)\" check_ld $(2) >&2; |
| endif |
| check_ld=$(shell \ |
| $(VERBOSE_CHECK_LD) \ |
| if [ "x$(1)" != "x" ] && [ "x$(2)" != "x" ]; then \ |
| $(1) -o /dev/null -b binary /dev/null > /dev/null 2>&1 && \ |
| echo "-Wl,$(2)" ; \ |
| fi) |
| |
| ifneq ($(filter $(nocheck_targets),$(MAKECMDGOALS)),) |
| check_ld:= |
| endif |
| |
| # A not very robust macro to check for available strip flags |
| ifeq ($(strip $(BUILD_VERBOSE)),2) |
| VERBOSE_CHECK_STRIP=echo STRIPCMD=\"$(1)\" check_strip $(2) >&2; |
| endif |
| check_strip=$(shell \ |
| $(VERBOSE_CHECK_STRIP) \ |
| if [ "x$(1)" != "x" ] && [ "x$(2)" != "x" ]; then \ |
| echo "int i;" > ./conftest.c ; \ |
| $(CC) -c -o conftest.o conftest.c > /dev/null 2>&1 ; \ |
| $(1) $(2) conftest.o > /dev/null 2>&1 && \ |
| echo "$(1) $(2)" || echo "$(3)"; \ |
| rm -f conftest.c conftest.o > /dev/null 2>&1 ; \ |
| fi) |
| |
| ifneq ($(filter $(nocheck_targets),$(MAKECMDGOALS)),) |
| check_strip:= |
| endif |
| |
| |
| # Select the compiler needed to build binaries for your development system |
| HOSTCC = gcc |
| HOSTCFLAGS:=$(call check_cc,$(HOSTCC),-Wall,) |
| HOSTCFLAGS+=$(call check_cc,$(HOSTCC),-Wstrict-prototypes,) |
| HOSTCFLAGS+=$(call check_cc,$(HOSTCC),-O2,) |
| HOSTCFLAGS+=$(call check_cc,$(HOSTCC),-fomit-frame-pointer,) |
| |
| LD_WHOLE_ARCHIVE:=$(shell echo "int i;" > conftest.c ; \ |
| $(CC) -c -o conftest.o conftest.c ; \ |
| echo "int main(void){return 0;}" > conftest_main.c ; \ |
| $(CC) -c -o conftest_main.o conftest_main.c ; \ |
| $(AR) $(ARFLAGS) conftest.a conftest.o ; \ |
| $(CC) -Wl,--whole-archive conftest.a -Wl,--no-whole-archive \ |
| conftest_main.o -o conftest > /dev/null 2>&1 \ |
| && echo "-Wl,--whole-archive" ; \ |
| rm conftest_main.o conftest_main.c conftest.o conftest.c \ |
| conftest.a conftest > /dev/null 2>&1 ; ) |
| ifneq ($(findstring whole-archive,$(LD_WHOLE_ARCHIVE)),) |
| LD_NO_WHOLE_ARCHIVE:= -Wl,--no-whole-archive |
| endif |
| |
| LD_START_GROUP:=$(shell echo "int bar(void){return 0;}" > conftest.c ; \ |
| $(CC) -c -o conftest.o conftest.c ; \ |
| echo "int main(void){return bar();}" > conftest_main.c ; \ |
| $(CC) -c -o conftest_main.o conftest_main.c ; \ |
| $(AR) $(ARFLAGS) conftest.a conftest.o ; \ |
| $(CC) -Wl,--start-group conftest.a conftest_main.o -Wl,--end-group \ |
| -o conftest > /dev/null 2>&1 && echo "-Wl,--start-group" ; \ |
| rm conftest_main.o conftest_main.c conftest.o conftest.c \ |
| conftest.a conftest > /dev/null 2>&1 ; ) |
| ifneq ($(findstring start-group,$(LD_START_GROUP)),) |
| LD_END_GROUP:= -Wl,--end-group |
| endif |
| |
| CHECKED_LDFLAGS := $(call check_ld,$(LD),--warn-common,) |
| #CHECKED_LDFLAGS := $(call check_ld,$(LD),-static-libgcc,) |
| |
| # Pin CHECKED_CFLAGS with := so it's only evaluated once. |
| CHECKED_CFLAGS:=$(call check_cc,$(CC),-Wall,) |
| CHECKED_CFLAGS+=$(call check_cc,$(CC),-Wstrict-prototypes,) |
| CHECKED_CFLAGS+=$(call check_cc,$(CC),-Wshadow,) |
| CHECKED_CFLAGS+=$(call check_cc,$(CC),-funsigned-char,) |
| CHECKED_CFLAGS+=$(call check_cc,$(CC),-fno-builtin-strlen,) |
| CHECKED_CFLAGS+=$(call check_cc,$(CC),-finline-limit=0,) |
| CHECKED_CFLAGS+=$(call check_cc,$(CC),-static-libgcc,) |
| |
| # Preemptively pin this too. |
| PROG_CFLAGS:= |
| |
| |
| #-------------------------------------------------------- |
| # 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:=$(call check_cc,$(CC),-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 $$?)),0) |
| CFLAGS_COMBINE:=$(call check_cc,$(CC),--combine,) |
| endif |
| OPTIMIZATION+=$(call check_cc,$(CC),-funit-at-a-time,) |
| OPTIMIZATION+=$(call check_cc,$(CC),-fgcse-after-reload,) |
| ifneq ($(CONFIG_BUILD_LIBBUSYBOX),y) |
| # http://gcc.gnu.org/bugzilla/show_bug.cgi?id=25795 |
| # This prevents us from using -fwhole-program when we build the lib |
| PROG_CFLAGS+=$(call check_cc,$(CC),-fwhole-program,) |
| endif # CONFIG_BUILD_LIBBUSYBOX |
| endif # CONFIG_BUILD_AT_ONCE |
| |
| LIB_LDFLAGS:=$(call check_ld,$(LD),--enable-new-dtags,) |
| #LIB_LDFLAGS+=$(call check_ld,$(LD),--reduce-memory-overheads,) |
| #LIB_LDFLAGS+=$(call check_ld,$(LD),--as-needed,) |
| #LIB_LDFLAGS+=$(call check_ld,$(LD),--warn-shared-textrel,) |
| |
| |
| # Some nice architecture specific optimizations |
| ifeq ($(strip $(TARGET_ARCH)),arm) |
| OPTIMIZATION+=-fstrict-aliasing |
| endif |
| ifeq ($(strip $(TARGET_ARCH)),i386) |
| OPTIMIZATION+=$(call check_cc,$(CC),-march=i386,) |
| # gcc-4.0 and older seem to benefit from these |
| ifneq ($(strip $(shell [ $(CC_MAJOR) -ge 4 -a $(CC_MINOR) -ge 1 ] ; echo $$?)),0) |
| OPTIMIZATION+=$(call check_cc,$(CC),-mpreferred-stack-boundary=2,) |
| OPTIMIZATION+=$(call check_cc,$(CC),-falign-functions=1 -falign-jumps=1 -falign-loops=1, -malign-functions=0 -malign-jumps=0 -malign-loops=0,) |
| |
| # gcc 4.1 produces many broken, totally invalid warnings |
| CHECKED_CFLAGS+=$(call check_cc,$(CC),-Werror,) |
| 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+=$(call check_cc,$(CC),-fno-tree-loop-optimize,) |
| OPTIMIZATION+=$(call check_cc,$(CC),-fno-tree-dominator-opts,) |
| OPTIMIZATION+=$(call check_cc,$(CC),-fno-strength-reduce,) |
| |
| OPTIMIZATION+=$(call check_cc,$(CC),-fno-branch-count-reg,) |
| endif # gcc-4.1 and beyond |
| endif |
| OPTIMIZATION+=$(call check_cc,$(CC),-fomit-frame-pointer,) |
| OPTIMIZATION+=$(call check_cc,$(CC),-ffunction-sections -fdata-sections,) |
| |
| # |
| #-------------------------------------------------------- |
| # 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 $(CONFIG_EFENCE)),y) |
| LIBRARIES:=-lefence |
| endif |
| endif |
| |
| # Debugging info |
| |
| ifeq ($(strip $(CONFIG_DEBUG)),y) |
| CFLAGS +=-g |
| else |
| CFLAGS +=-DNDEBUG |
| CHECKED_LDFLAGS += $(call check_ld,$(LD),--sort-common,) |
| CHECKED_LDFLAGS += $(call check_ld,--gc-sections,) |
| endif |
| |
| ifneq ($(strip $(CONFIG_DEBUG_PESSIMIZE)),y) |
| CFLAGS += $(OPTIMIZATION) |
| endif |
| |
| # warn a bit more verbosely for non-release versions |
| ifneq ($(EXTRAVERSION),) |
| CHECKED_CFLAGS+=$(call check_cc,$(CC),-Wstrict-prototypes,) |
| CHECKED_CFLAGS+=$(call check_cc,$(CC),-Wmissing-prototypes,) |
| CHECKED_CFLAGS+=$(call check_cc,$(CC),-Wmissing-declarations,) |
| CHECKED_CFLAGS+=$(call check_cc,$(CC),-Wunused,) |
| CHECKED_CFLAGS+=$(call check_cc,$(CC),-Winit-self,) |
| CHECKED_CFLAGS+=$(call check_cc,$(CC),-Wshadow,) |
| CHECKED_CFLAGS+=$(call check_cc,$(CC),-Wcast-align,) |
| endif |
| STRIPCMD:=$(call check_strip,$(STRIP),-s --remove-section=.note --remove-section=.comment,$(STRIP)) |
| ifeq ($(strip $(CONFIG_STATIC)),y) |
| PROG_CFLAGS += $(call check_cc,$(CC),-static,) |
| endif |
| CFLAGS_SHARED := $(call check_cc,$(CC),-shared,) |
| LIB_CFLAGS+=$(CFLAGS_SHARED) |
| |
| ifeq ($(strip $(CONFIG_BUILD_LIBBUSYBOX)),y) |
| CFLAGS_PIC:= $(call check_cc,$(CC),-fPIC,) |
| LIB_CFLAGS+=$(CFLAGS_PIC) |
| endif |
| |
| ifeq ($(strip $(CONFIG_SELINUX)),y) |
| LIBRARIES += -lselinux |
| endif |
| |
| ifeq ($(strip $(PREFIX)),) |
| PREFIX:=`pwd`/_install |
| endif |
| |
| ifneq ($(strip $(CONFIG_GETOPT_LONG)),y) |
| CFLAGS += -D__need_getopt |
| endif |
| |
| # Additional complications due to support for pristine source dir. |
| # Include files in the build directory should take precedence over |
| # the copy in top_srcdir, both during the compilation phase and the |
| # shell script that finds the list of object files. |
| # Work in progress by <ldoolitt@recycle.lbl.gov>. |
| |
| |
| OBJECTS:=$(APPLET_SOURCES:.c=.o) busybox.o usage.o applets.o |
| CFLAGS += $(CHECKED_CFLAGS) $(CROSS_CFLAGS) |
| LDFLAGS += $(CHECKED_LDFLAGS) |
| |
| ifdef BB_INIT_SCRIPT |
| CFLAGS += -DINIT_SCRIPT='"$(BB_INIT_SCRIPT)"' |
| endif |
| |
| # Put user-supplied flags at the end, where they |
| # have a chance of winning. |
| -include $(top_builddir)/.config.mak |
| |
| #------------------------------------------------------------ |
| # Installation options |
| ifeq ($(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,$(MAKEFLAGS)),) |
| export MAKE_IS_SILENT=y |
| SECHO := @-false |
| DISP := sil |
| Q := @ |
| else |
| ifneq ($(BUILD_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_link.h = echo " "HOSTLINK $(show_objs) |
| pur_disp_ar = echo " "AR $(ARFLAGS) $(show_objs) |
| pur_disp_elf2flt = echo " "ELF2FLT $(ELF2FLTFLAGS) $(show_objs) |
| sil_disp_compile.c = true |
| sil_disp_compile.h = true |
| sil_disp_strip = true |
| sil_disp_link = true |
| sil_disp_link.h = true |
| sil_disp_ar = true |
| sil_disp_elf2flt = 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_link.h = echo $(cmd_link.h) |
| ver_disp_ar = echo $(cmd_ar) |
| ver_disp_elf2flt = echo $(cmd_elf2flt) |
| 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 = $(SECHO) " "GEN $@ ; true |
| disp_doc = $(SECHO) " "DOC $(subst docs/,,$@) ; true |
| disp_elf2flt = $($(DISP)_disp_elf2flt) |
| cmd_compile.c = $(CC) $(CFLAGS) $(EXTRA_CFLAGS) -c -o $@ $< |
| cmd_compile.h = $(HOSTCC) $(HOSTCFLAGS) $(INCS) -c -o $@ $< |
| cmd_strip = $(STRIPCMD) $@ |
| cmd_link = $(CC) $(CFLAGS) $(EXTRA_CFLAGS) $(LDFLAGS) \ |
| $(PROG_CFLAGS) $(PROG_LDFLAGS) $(CFLAGS_COMBINE) \ |
| -o $@ $(LD_START_GROUP) \ |
| $(APPLETS_DEFINE) $(APPLET_SRC) \ |
| $(BUSYBOX_DEFINE) $(BUSYBOX_SRC) $(libraries-y) \ |
| $(LDBUSYBOX) $(LIBRARIES) \ |
| $(LD_END_GROUP) |
| cmd_link.so = $(CC) $(CFLAGS) $(EXTRA_CFLAGS) $(LDFLAGS) \ |
| $(LIB_CFLAGS) $(CFLAGS_COMBINE) $(LIB_LDFLAGS) \ |
| -o $(@) $(LD_START_GROUP) $(LD_WHOLE_ARCHIVE) \ |
| $(LIBRARY_DEFINE) $(^) \ |
| $(LD_NO_WHOLE_ARCHIVE) $(LD_END_GROUP) |
| cmd_link.h = $(HOSTCC) $(HOSTCFLAGS) $(INCS) $< -o $@ |
| cmd_ar = $(AR) $(ARFLAGS) $@ $^ |
| cmd_elf2flt = $(ELF2FLT) $(ELF2FLTFLAGS) $< -o $@ |
| compile.c = @$(disp_compile.c) ; $(cmd_compile.c) |
| compile.h = @$(disp_compile.h) ; $(cmd_compile.h) |
| do_strip = @$(disp_strip) ; $(cmd_strip) |
| do_link = @$(disp_link) ; $(cmd_link) |
| do_link.so = @$(disp_link) ; $(cmd_link.so) |
| do_link.h = @$(disp_link.h) ; $(cmd_link.h) |
| do_ar = @$(disp_ar) ; $(cmd_ar) |
| do_elf2flt = @$(disp_elf2flt) ; $(cmd_elf2flt) |
| |
| uppercase = $(shell echo $1 | $(SED) -e "y/abcdefghijklmnopqrstuvwxyz/ABCDEFGHIJKLMNOPQRSTUVWXYZ/") |
| %.a: |
| @if test -z "$($(call uppercase,$*)_DIR)" ; then \ |
| echo "Invalid target $@" ; \ |
| exit 1 ; \ |
| fi |
| $(Q)$(MAKE) $($(call uppercase,$*)_DIR)$@ |
| |
| .PHONY: dummy |