-#
-# This file contains rules which are shared between multiple Makefiles.
-#
+# Rules.make for busybox
+#
+# Copyright (C) 2001-2003 Erik Andersen <andersen@codepoet.org>
+#
+# 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
+#
+
+#--------------------------------------------------------
+PROG := busybox
+VERSION := 1.00-pre3
+BUILDTIME := $(shell TZ=UTC date -u "+%Y.%m.%d-%H:%M%z")
+
+
+#--------------------------------------------------------
+# With a modern GNU make(1) (highly recommended, that's what all the
+# developers use), all of the following configuration values can be
+# overridden at the command line. For example:
+# make CROSS=powerpc-linux- BB_SRC_DIR=$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)))
+#CROSS =/usr/i386-linux-uclibc/bin/i386-uclibc-
+CC = $(CROSS)gcc
+AR = $(CROSS)ar
+AS = $(CROSS)as
+LD = $(CROSS)ld
+NM = $(CROSS)nm
+STRIP = $(CROSS)strip
+CPP = $(CC) -E
+MAKEFILES = $(TOPDIR).config
+
+# What OS are you compiling busybox for? This allows you to include
+# OS specific things, syscall overrides, etc.
+TARGET_OS=linux
+
+# Select the compiler needed to build binaries for your development system
+HOSTCC = gcc
+HOSTCFLAGS= -Wall -Wstrict-prototypes -O2 -fomit-frame-pointer
+
+# Ensure consistent sort order, 'gcc -print-search-dirs' behavior, etc.
+LC_ALL:= C
+
+# If you want to add some simple compiler switches (like -march=i686),
+# especially from the command line, use this instead of CFLAGS directly.
+# For optimization overrides, it's better still to set OPTIMIZATION.
+CFLAGS_EXTRA=$(subst ",, $(strip $(EXTRA_CFLAGS_OPTIONS)))
+
+# If you have a "pristine" source directory, point BB_SRC_DIR to it.
+# Experimental and incomplete; tell the mailing list
+# <busybox@busybox.net> if you do or don't like it so far.
+BB_SRC_DIR=
+
+# To compile vs some other alternative libc, you may need to use/adjust
+# the following lines to meet your needs...
+#
+# If you are using Red Hat 6.x with the compatible RPMs (for developing under
+# Red Hat 5.x and glibc 2.0) uncomment the following. Be sure to read about
+# using the compatible RPMs (compat-*) at http://www.redhat.com !
+#LIBCDIR:=/usr/i386-glibc20-linux
+#
+# For other libraries, you are on your own. But these may (or may not) help...
+#LDFLAGS+=-nostdlib
+#LIBRARIES:=$(LIBCDIR)/lib/libc.a -lgcc
+#CROSS_CFLAGS+=-nostdinc -I$(LIBCDIR)/include -I$(GCCINCDIR)
+#GCCINCDIR:=$(shell gcc -print-search-dirs | sed -ne "s/install: \(.*\)/\1include/gp")
+
+WARNINGS=-Wall -Wstrict-prototypes -Wshadow
+CFLAGS=-I$(TOPDIR)include
+ARFLAGS=-r
+
+#--------------------------------------------------------
+export VERSION BUILDTIME TOPDIR HOSTCC HOSTCFLAGS CROSS CC AR AS LD NM STRIP CPP
+ifeq ($(strip $(TARGET_ARCH)),)
+TARGET_ARCH=$(shell $(CC) -dumpmachine | sed -e s'/-.*//' \
+ -e 's/i.86/i386/' \
+ -e 's/sparc.*/sparc/' \
+ -e 's/arm.*/arm/g' \
+ -e 's/m68k.*/m68k/' \
+ -e 's/ppc/powerpc/g' \
+ -e 's/v850.*/v850/g' \
+ -e 's/sh[234]/sh/' \
+ -e 's/mips-.*/mips/' \
+ -e 's/mipsel-.*/mipsel/' \
+ -e 's/cris.*/cris/' \
+ )
+endif
-#
-# False targets.
-#
-.PHONY: dummy
+# Pull in the user's busybox configuration
+ifeq ($(filter $(noconfig_targets),$(MAKECMDGOALS)),)
+-include $(TOPDIR).config
+endif
-#
-# Special variables which should not be exported
-#
-unexport EXTRA_AFLAGS
-unexport EXTRA_CFLAGS
-unexport EXTRA_LDFLAGS
-unexport EXTRA_ARFLAGS
-unexport SUBDIRS
-unexport SUB_DIRS
-unexport ALL_SUB_DIRS
-unexport O_TARGET
-
-unexport obj-y
-unexport obj-n
-unexport obj-
-unexport export-objs
-unexport subdir-y
-unexport subdir-n
-unexport subdir-
+# A nifty macro to make testing gcc features easier
+check_gcc=$(shell if $(CC) $(1) -S -o /dev/null -xc /dev/null > /dev/null 2>&1; \
+ then echo "$(1)"; else echo "$(2)"; fi)
-#
-# Get things started.
-#
-first_rule: sub_dirs
- $(MAKE) all_targets
+#--------------------------------------------------------
+# Arch specific compiler optimization stuff should go here.
+# Unless you want to override the defaults, do not set anything
+# for OPTIMIZATION...
-SUB_DIRS := $(subdir-y)
-ALL_SUB_DIRS := $(sort $(subdir-y) $(subdir-n) $(subdir-))
+# use '-Os' optimization if available, else use -O2
+OPTIMIZATION=
+OPTIMIZATION=${call check_gcc,-Os,-O2}
+# 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,)
+ 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
+OPTIMIZATIONS=$(OPTIMIZATION) -fomit-frame-pointer
#
-# Common rules
-#
-
-%.s: %.c
- $(CC) $(CFLAGS) $(EXTRA_CFLAGS) $(CFLAGS_$@) -S $< -o $@
-
-%.i: %.c
- $(CPP) $(CFLAGS) $(EXTRA_CFLAGS) $(CFLAGS_$@) $< > $@
-
-%.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
-
-%.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
-
-%.s: %.S
- $(CPP) $(AFLAGS) $(EXTRA_AFLAGS) $(AFLAGS_$@) $< > $@
-
-%.o: %.S
- $(CC) $(AFLAGS) $(EXTRA_AFLAGS) $(AFLAGS_$@) -c -o $@ $<
+#--------------------------------------------------------
+# If you're going to do a lot of builds with a non-vanilla configuration,
+# it makes sense to adjust parameters above, so you can type "make"
+# by itself, instead of following it by the same half-dozen overrides
+# every time. The stuff below, on the other hand, is probably less
+# prone to casual user adjustment.
+#
+ifeq ($(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 +=-Wl,-warn-common
+ STRIPCMD:=/bin/true -Not_stripping_since_we_are_debugging
+else
+ CFLAGS+=$(WARNINGS) $(OPTIMIZATIONS) -D_GNU_SOURCE -DNDEBUG
+ LDFLAGS += -s -Wl,-warn-common
+ STRIPCMD:=$(STRIP) --remove-section=.note --remove-section=.comment
+endif
+ifeq ($(strip $(CONFIG_STATIC)),y)
+ LDFLAGS += --static
endif
-%.lst: %.c
- $(CC) $(CFLAGS) $(EXTRA_CFLAGS) $(CFLAGS_$@) -g -c -o $*.o $<
- $(TOPDIR)/scripts/makelst $* $(TOPDIR) $(OBJDUMP)
-#
-#
-#
-all_targets: $(O_TARGET) $(L_TARGET)
+ifeq ($(strip $(PREFIX)),)
+ PREFIX:=`pwd`/_install
+endif
+# Additional complications due to support for pristine source dir.
+# Include files in the build directory should take precedence over
+# the copy in BB_SRC_DIR, both during the compilation phase and the
+# shell script that finds the list of object files.
+# Work in progress by <ldoolitt@recycle.lbl.gov>.
#
-# Rule to compile a set of .o files into one .o file
-#
-ifdef O_TARGET
-$(O_TARGET): $(obj-y)
- rm -f $@
- ifneq "$(strip $(obj-y))" ""
- $(LD) $(EXTRA_LDFLAGS) -r -o $@ $(filter $(obj-y), $^)
- else
- $(AR) rcs $@
- endif
- @ ( \
- echo 'ifeq ($(strip $(subst $(comma),:,$(EXTRA_LDFLAGS) $(obj-y))),$$(strip $$(subst $$(comma),:,$$(EXTRA_LDFLAGS) $$(obj-y))))' ; \
- echo 'FILES_FLAGS_UP_TO_DATE += $@' ; \
- echo 'endif' \
- ) > $(dir $@)/.$(notdir $@).flags
-endif # O_TARGET
+ifneq ($(strip $(BB_SRC_DIR)),)
+ VPATH:=$(BB_SRC_DIR)
+endif
-#
-# Rule to compile a set of .o files into one .a file
-#
-ifdef L_TARGET
-$(L_TARGET): $(obj-y)
- rm -f $@
- $(AR) $(EXTRA_ARFLAGS) rcs $@ $(obj-y)
- @ ( \
- echo 'ifeq ($(strip $(subst $(comma),:,$(EXTRA_ARFLAGS) $(obj-y))),$$(strip $$(subst $$(comma),:,$$(EXTRA_ARFLAGS) $$(obj-y))))' ; \
- echo 'FILES_FLAGS_UP_TO_DATE += $@' ; \
- echo 'endif' \
- ) > $(dir $@)/.$(notdir $@).flags
+OBJECTS:=$(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)
-#
-# This make dependencies quickly
-#
+%.o: %.c
+ $(CC) $(CFLAGS) $(EXTRA_CFLAGS) -c -o $@ $<
+
+ifdef _FASTDEP_ALL_SUB_DIRS
fastdep: dummy
- $(TOPDIR)/scripts/mkdep $(CFLAGS) $(EXTRA_CFLAGS) -- $(wildcard *.[chS]) > .depend
+ $(TOPDIR)scripts/mkdep $(CFLAGS) $(EXTRA_CFLAGS_nostdinc) -- $(wildcard *.[chS]) > .depend
ifdef ALL_SUB_DIRS
$(MAKE) $(patsubst %,_sfdep_%,$(ALL_SUB_DIRS)) _FASTDEP_ALL_SUB_DIRS="$(ALL_SUB_DIRS)"
endif
-ifdef _FASTDEP_ALL_SUB_DIRS
$(patsubst %,_sfdep_%,$(_FASTDEP_ALL_SUB_DIRS)):
$(MAKE) -C $(patsubst _sfdep_%,%,$@) fastdep
endif
-
-#
-# 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 $(patsubst _subdir_%,%,$@)
-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
-endif
+.PHONY: dummy
-ifneq ($(wildcard $(TOPDIR)/.hdepend),)
-include $(TOPDIR)/.hdepend
-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 :=
-# For use in expunging commas from flags, which mung our checking.
-comma = ,
+.EXPORT_ALL_VARIABLES:
-FILES_FLAGS_EXIST := $(wildcard .*.flags)
-ifneq ($(FILES_FLAGS_EXIST),)
-include $(FILES_FLAGS_EXIST)
-endif
-
-FILES_FLAGS_CHANGED := $(strip \
- $(filter-out $(FILES_FLAGS_UP_TO_DATE), \
- $(O_TARGET) $(L_TARGET) $(active-objs) \
- ))
-
-# 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)), \
- $(FILES_FLAGS_CHANGED)))
-
-ifneq ($(FILES_FLAGS_CHANGED),)
-$(FILES_FLAGS_CHANGED): dummy
-endif
projects / oweals / busybox.git / blobdiff