+# Rules.make for busybox
#
-# This file contains rules which are shared between multiple Makefiles.
+# Copyright (C) 1999-2005 by Erik Andersen <andersen@codepoet.org>
#
-
-#
-# False targets.
+# Licensed under GPLv2, see the file LICENSE in this tarball for details.
#
-.PHONY: dummy
-#
-# Special variables which should not be exported
-#
-unexport EXTRA_AFLAGS
-unexport EXTRA_CFLAGS
-unexport EXTRA_LDFLAGS
-unexport EXTRA_ARFLAGS
-unexport SUBDIRS
-unexport SUB_DIRS
-unexport ALL_SUB_DIRS
-unexport O_TARGET
-
-unexport obj-y
-unexport obj-n
-unexport obj-
-unexport export-objs
-unexport subdir-y
-unexport subdir-n
-unexport subdir-
+# Pull in the user's busybox configuration
+ifeq ($(filter $(noconfig_targets),$(MAKECMDGOALS)),)
+-include $(top_builddir)/.config
+endif
+#--------------------------------------------------------
+PROG := busybox
+MAJOR_VERSION :=1
+MINOR_VERSION :=1
+SUBLEVEL_VERSION:=1
+EXTRAVERSION :=
+VERSION :=$(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 = $(CC) -E
+SED ?= sed
+
+
+# What OS are you compiling busybox for? This allows you to include
+# OS specific things, syscall overrides, etc.
+TARGET_OS=linux
+
+# Select the compiler needed to build binaries for your development system
+HOSTCC = gcc
+HOSTCFLAGS= -Wall -Wstrict-prototypes -O2 -fomit-frame-pointer
+
+# Ensure consistent sort order, 'gcc -print-search-dirs' behavior, etc.
+LC_ALL:= C
+
+# If you want to add some simple compiler switches (like -march=i686),
+# especially from the command line, use this instead of CFLAGS directly.
+# For optimization overrides, it's better still to set OPTIMIZATION.
+CFLAGS_EXTRA=$(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...
#
-# Get things started.
+# 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
#
-first_rule: sub_dirs
- $(MAKE) all_targets
+# For other libraries, you are on your own. But these may (or may not) help...
+#LDFLAGS+=-nostdlib
+#LIBRARIES:=$(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
-SUB_DIRS := $(subdir-y)
-ALL_SUB_DIRS := $(sort $(subdir-y) $(subdir-n) $(subdir-))
+# A nifty macro to make testing gcc features easier
+check_gcc=$(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)
-#
-# Common rules
-#
+CFLAGS+=$(call check_gcc,-funsigned-char,)
-%.s: %.c
- $(CC) $(CFLAGS) $(EXTRA_CFLAGS) $(CFLAGS_$@) -S $< -o $@
+CFLAGS+=$(call check_gcc,-mmax-stack-frame=256,)
-%.i: %.c
- $(CPP) $(CFLAGS) $(EXTRA_CFLAGS) $(CFLAGS_$@) $< > $@
+#--------------------------------------------------------
+# Arch specific compiler optimization stuff should go here.
+# Unless you want to override the defaults, do not set anything
+# for OPTIMIZATION...
-%.o: %.c
- $(CC) $(CFLAGS) $(EXTRA_CFLAGS) $(CFLAGS_$@) -c -o $@ $<
- @ ( \
- echo 'ifeq ($(strip $(subst $(comma),:,$(CFLAGS) $(EXTRA_CFLAGS) $(CFLAGS_$@))),$$(strip $$(subst $$(comma),:,$$(CFLAGS) $$(EXTRA_CFLAGS) $$(CFLAGS_$@))))' ; \
- echo 'FILES_FLAGS_UP_TO_DATE += $@' ; \
- echo 'endif' \
- ) > $(dir $@)/.$(notdir $@).flags
+# use '-Os' optimization if available, else use -O2
+OPTIMIZATION:=$(call check_gcc,-Os,-O2)
-%.o: %.s
- $(AS) $(AFLAGS) $(EXTRA_CFLAGS) -o $@ $<
-
-# Old makefiles define their own rules for compiling .S files,
-# but these standard rules are available for any Makefile that
-# wants to use them. Our plan is to incrementally convert all
-# the Makefiles to these standard rules. -- rmk, mec
-ifdef USE_STANDARD_AS_RULE
+ifeq ($(CONFIG_BUILD_AT_ONCE),y)
+# gcc 2.95 exits with 0 for "unrecognized option"
+ifeq ($(strip $(shell [ $(CC_MAJOR) -ge 3 ] ; echo $$?)),0)
+ CFLAGS_COMBINE:=$(call check_gcc,--combine,)
+endif
+OPTIMIZATION+=$(call check_gcc,-funit-at-a-time,)
+# http://gcc.gnu.org/bugzilla/show_bug.cgi?id=25795
+#PROG_CFLAGS+=$(call check_gcc,-fwhole-program,)
+endif # CONFIG_BUILD_AT_ONCE
-%.s: %.S
- $(CPP) $(AFLAGS) $(EXTRA_AFLAGS) $(AFLAGS_$@) $< > $@
+LIB_LDFLAGS:=$(call check_ld,--enable-new-dtags,)
+#LIB_LDFLAGS+=$(call check_ld,--reduce-memory-overheads,)
+#LIB_LDFLAGS+=$(call check_ld,--as-needed,)
+#LIB_LDFLAGS+=$(call check_ld,--warn-shared-textrel,)
-%.o: %.S
- $(CC) $(AFLAGS) $(EXTRA_AFLAGS) $(AFLAGS_$@) -c -o $@ $<
+# Some nice architecture specific optimizations
+ifeq ($(strip $(TARGET_ARCH)),arm)
+ OPTIMIZATION+=-fstrict-aliasing
endif
+ifeq ($(strip $(TARGET_ARCH)),i386)
+ OPTIMIZATION+=$(call check_gcc,-march=i386,)
+# gcc-4.0 and older seem to benefit from these
+#ifneq ($(strip $(shell [ $(CC_MAJOR) -ge 4 -a $(CC_MINOR) -ge 1 ] ; echo $$?)),0)
+ OPTIMIZATION+=$(call check_gcc,-mpreferred-stack-boundary=2,)
+ OPTIMIZATION+=$(call check_gcc,-falign-functions=1 -falign-jumps=1 -falign-loops=1,\
+ -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 $$?)),0)
+ # turn off flags which hurt -Os
+ OPTIMIZATION+=$(call check_gcc,-fno-tree-loop-optimize,)
+ OPTIMIZATION+=$(call check_gcc,-fno-tree-dominator-opts,)
+ OPTIMIZATION+=$(call check_gcc,-fno-strength-reduce,)
+
+ OPTIMIZATION+=$(call check_gcc,-fno-branch-count-reg,)
+endif # gcc-4.1 and beyond
+endif
+OPTIMIZATIONS:=$(OPTIMIZATION) $(call check_gcc,-fomit-frame-pointer,)
-%.lst: %.c
- $(CC) $(CFLAGS) $(EXTRA_CFLAGS) $(CFLAGS_$@) -g -c -o $*.o $<
- $(TOPDIR)/scripts/makelst $* $(TOPDIR) $(OBJDUMP)
-#
#
+#--------------------------------------------------------
+# If you're going to do a lot of builds with a non-vanilla configuration,
+# it makes sense to adjust parameters above, so you can type "make"
+# by itself, instead of following it by the same half-dozen overrides
+# every time. The stuff below, on the other hand, is probably less
+# prone to casual user adjustment.
#
-all_targets: $(O_TARGET) $(L_TARGET)
-#
-# Rule to compile a set of .o files into one .o file
-#
-ifdef O_TARGET
-$(O_TARGET): $(obj-y)
- rm -f $@
- ifneq "$(strip $(obj-y))" ""
- $(LD) $(EXTRA_LDFLAGS) -r -o $@ $(filter $(obj-y), $^)
- else
- $(AR) rcs $@
+ifeq ($(strip $(CONFIG_LFS)),y)
+ # For large file summit support
+ CFLAGS+=-D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE -D_FILE_OFFSET_BITS=64
+endif
+ifeq ($(strip $(CONFIG_DMALLOC)),y)
+ # For testing mem leaks with dmalloc
+ CFLAGS+=-DDMALLOC
+ LIBRARIES:=-ldmalloc
+else
+ ifeq ($(strip $(CONFIG_EFENCE)),y)
+ LIBRARIES:=-lefence
endif
- @ ( \
- echo 'ifeq ($(strip $(subst $(comma),:,$(EXTRA_LDFLAGS) $(obj-y))),$$(strip $$(subst $$(comma),:,$$(EXTRA_LDFLAGS) $$(obj-y))))' ; \
- echo 'FILES_FLAGS_UP_TO_DATE += $@' ; \
- echo 'endif' \
- ) > $(dir $@)/.$(notdir $@).flags
-endif # O_TARGET
-
-#
-# Rule to compile a set of .o files into one .a file
-#
-ifdef L_TARGET
-$(L_TARGET): $(obj-y)
- rm -f $@
- $(AR) $(EXTRA_ARFLAGS) rcs $@ $(obj-y)
- @ ( \
- echo 'ifeq ($(strip $(subst $(comma),:,$(EXTRA_ARFLAGS) $(obj-y))),$$(strip $$(subst $$(comma),:,$$(EXTRA_ARFLAGS) $$(obj-y))))' ; \
- echo 'FILES_FLAGS_UP_TO_DATE += $@' ; \
- echo 'endif' \
- ) > $(dir $@)/.$(notdir $@).flags
endif
-
-
-#
-# This make dependencies quickly
-#
-fastdep: dummy
- $(TOPDIR)/scripts/mkdep $(CFLAGS) $(EXTRA_CFLAGS) -- $(wildcard *.[chS]) > .depend
-ifdef ALL_SUB_DIRS
- $(MAKE) $(patsubst %,_sfdep_%,$(ALL_SUB_DIRS)) _FASTDEP_ALL_SUB_DIRS="$(ALL_SUB_DIRS)"
+ifeq ($(strip $(CONFIG_DEBUG)),y)
+ CFLAGS +=$(WARNINGS) -g -D_GNU_SOURCE
+ LDFLAGS += $(call check_ld,--warn-common,)
+else
+ CFLAGS+=$(WARNINGS) $(OPTIMIZATIONS) -D_GNU_SOURCE -DNDEBUG
+ LDFLAGS += $(call check_ld,--warn-common,)
+ LDFLAGS += $(call check_ld,--sort-common,)
endif
-
-ifdef _FASTDEP_ALL_SUB_DIRS
-$(patsubst %,_sfdep_%,$(_FASTDEP_ALL_SUB_DIRS)):
- $(MAKE) -C $(patsubst _sfdep_%,%,$@) fastdep
+STRIPCMD:=$(STRIP) -s --remove-section=.note --remove-section=.comment
+ifeq ($(strip $(CONFIG_STATIC)),y)
+ PROG_CFLAGS += $(call check_gcc,-static,)
endif
+CFLAGS_SHARED += $(call check_gcc,-shared,)
+LIB_CFLAGS+=$(CFLAGS_SHARED)
-
-#
-# A rule to make subdirectories
-#
-subdir-list = $(sort $(patsubst %,_subdir_%,$(SUB_DIRS)))
-sub_dirs: dummy $(subdir-list)
-
-ifdef SUB_DIRS
-$(subdir-list) : dummy
- $(MAKE) -C $(patsubst _subdir_%,%,$@)
+ifeq ($(strip $(CONFIG_BUILD_LIBBUSYBOX)),y)
+ CFLAGS_PIC:= $(call check_gcc,-fPIC,)
+ LIB_CFLAGS+=$(CFLAGS_PIC)
endif
-#
-# A rule to do nothing
-#
-dummy:
-#
-# This is useful for testing
-#
-script:
- $(SCRIPT)
-
-#
-# include dependency files if they exist
-#
-ifneq ($(wildcard .depend),)
-include .depend
+ifeq ($(strip $(CONFIG_SELINUX)),y)
+ SELINUX_INC ?= /usr/include
+ SELINUX_LIB ?= /usr/lib
+ CFLAGS := -I$(SELINUX_INC) $(CFLAGS)
+ LDFLAGS := -L$(SELINUX_LIB) $(LDFLAGS)
+ LIBRARIES += -lselinux
endif
-ifneq ($(wildcard $(TOPDIR)/.hdepend),)
-include $(TOPDIR)/.hdepend
+ifeq ($(strip $(PREFIX)),)
+ PREFIX:=`pwd`/_install
endif
-#
-# Find files whose flags have changed and force recompilation.
-# For safety, this works in the converse direction:
-# every file is forced, except those whose flags are positively up-to-date.
-#
-FILES_FLAGS_UP_TO_DATE :=
+# 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>.
-# For use in expunging commas from flags, which mung our checking.
-comma = ,
-FILES_FLAGS_EXIST := $(wildcard .*.flags)
-ifneq ($(FILES_FLAGS_EXIST),)
-include $(FILES_FLAGS_EXIST)
+OBJECTS:=$(APPLET_SOURCES:.c=.o) busybox.o usage.o applets.o
+CFLAGS += $(CROSS_CFLAGS)
+ifdef BB_INIT_SCRIPT
+ CFLAGS += -DINIT_SCRIPT='"$(BB_INIT_SCRIPT)"'
endif
-FILES_FLAGS_CHANGED := $(strip \
- $(filter-out $(FILES_FLAGS_UP_TO_DATE), \
- $(O_TARGET) $(L_TARGET) $(active-objs) \
- ))
+# Put user-supplied flags at the end, where they
+# have a chance of winning.
+CFLAGS += $(CFLAGS_EXTRA)
-# A kludge: .S files don't get flag dependencies (yet),
-# because that will involve changing a lot of Makefiles. Also
-# suppress object files explicitly listed in $(IGNORE_FLAGS_OBJS).
-# This allows handling of assembly files that get translated into
-# multiple object files (see arch/ia64/lib/idiv.S, for example).
-FILES_FLAGS_CHANGED := $(strip \
- $(filter-out $(patsubst %.S, %.o, $(wildcard *.S) $(IGNORE_FLAGS_OBJS)), \
- $(FILES_FLAGS_CHANGED)))
+#------------------------------------------------------------
+# Installation options
+ifeq ($(strip $(CONFIG_INSTALL_APPLET_HARDLINKS)),y)
+INSTALL_OPTS=--hardlinks
+endif
+ifeq ($(strip $(CONFIG_INSTALL_APPLET_SYMLINKS)),y)
+INSTALL_OPTS=--symlinks
+endif
+ifeq ($(strip $(CONFIG_INSTALL_APPLET_DONT)),y)
+INSTALL_OPTS=
+endif
-ifneq ($(FILES_FLAGS_CHANGED),)
-$(FILES_FLAGS_CHANGED): dummy
+#------------------------------------------------------------
+# Make the output nice and tight
+MAKEFLAGS += --no-print-directory
+export MAKE_IS_SILENT=n
+ifneq ($(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
projects / oweals / busybox.git / blobdiff