diff options
Diffstat (limited to 'Rules.mak')
| -rw-r--r-- | Rules.mak | 361 |
1 files changed, 187 insertions, 174 deletions
@@ -1,195 +1,208 @@ -# -# This file contains rules which are shared between multiple Makefiles. -# - -# -# False targets. -# -.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- - -# -# Get things started. -# -first_rule: sub_dirs - $(MAKE) all_targets - -SUB_DIRS := $(subdir-y) -ALL_SUB_DIRS := $(sort $(subdir-y) $(subdir-n) $(subdir-)) - - -# -# 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 $@ $< - +# Rules.make for busybox +# +# Copyright (C) 2002 Erik Andersen <andersee@debian.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 := 0.61.pre +BUILDTIME := $(shell TZ=UTC date -u "+%Y.%m.%d-%H:%M%z") +HOSTCC := gcc +HOSTCFLAGS:= -Wall -Wstrict-prototypes -O2 -fomit-frame-pointer + + +# What OS are you compiling busybox for? This allows you to include +# OS specific things, syscall overrides, etc. +TARGET_OS:=linux + +# With a modern GNU make(1) (highly recommended, that's what all the +# developers use), all of the following configuration values can be +# overridden at the command line. For example: +# make CROSS=powerpc-linux- BB_SRC_DIR=$HOME/busybox PREFIX=/mnt/app + +# If you 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:= + +# If you want a static binary, turn this on. +DOSTATIC:=false + +# Set the following to `true' to make a debuggable build. +# Leave this set to `false' for production use. +DODEBUG:=false + +# This enables compiling with dmalloc ( http://dmalloc.com/ ) +# which is an excellent public domain mem leak and malloc problem +# detector. To enable dmalloc, before running busybox you will +# want to first set up your environment. +# eg: `export DMALLOC_OPTIONS=debug=0x34f47d83,inter=100,log=logfile` +# The debug= value is generated using the following command +# dmalloc -p log-stats -p log-non-free -p log-bad-space -p log-elapsed-time \ +# -p check-fence -p check-heap -p check-lists -p check-blank \ +# -p check-funcs -p realloc-copy -p allow-free-null +# Do not enable this for production builds... +DODMALLOC:=false + +# Electric-fence is another very useful malloc debugging library. +# Do not enable this for production builds... +DOEFENCE:=false + +# If you want large file summit support, turn this on. +# This has no effect if you don't have a kernel with lfs +# support, and a system with libc-2.1.3 or later. +# Some of the programs that can benefit from lfs support +# are dd, gzip, mount, tar, and mkfs_minix. +# LFS allows you to use the above programs for files +# larger than 2GB! +DOLFS:=false + +# 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:= + +# If you are running a cross compiler, you may want to set CROSS +# to something more interesting, like "arm-linux-". +CROSS:= +CC := $(CROSS)gcc +AR := $(CROSS)ar +AS := $(CROSS)as +LD := $(CROSS)ld +NM := $(CROSS)nm +STRIP := $(CROSS)strip +CPP := $(CC) -E +MAKEFILES := $(TOPDIR).config +export VERSION BUILDTIME TOPDIR HOSTCC HOSTCFLAGS CROSS CC AR AS LD NM STRIP CPP + + +# To compile vs uClibc, just use the compiler wrapper built by uClibc... +# Everything should compile and work as expected these days... +#CC:=/usr/i386-linux-uclibc/usr/bin/i386-uclibc-gcc + +# To compile vs some other alternative libc, you may need to use/adjust +# the following lines to meet your needs... +# +# If you are using Red Hat 6.x with the compatible RPMs (for developing under +# Red Hat 5.x and glibc 2.0) uncomment the following. Be sure to read about +# using the compatible RPMs (compat-*) at http://www.redhat.com ! +#LIBCDIR:=/usr/i386-glibc20-linux +# +# The following is used for libc5 (if you install altgcc and libc5-altdev +# on a Debian system). +#LIBCDIR:=/usr/i486-linuxlibc1 +# +# For other libraries, you are on your own... +#LDFLAGS+=-nostdlib +#LIBRARIES:=$(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") + +# use '-Os' optimization if available, else use -O2 +OPTIMIZATION:=${shell if $(CC) -Os -S -o /dev/null -xc /dev/null \ + >/dev/null 2>&1; then echo "-Os"; else echo "-O2" ; fi} +GCC_STACK_BOUNDRY:=${shell if $(CC) -mpreferred-stack-boundary=2 -S -o /dev/null -xc /dev/null \ + >/dev/null 2>&1; then echo "-mpreferred-stack-boundary=2"; else echo "" ; fi} +OPTIMIZATIONS:=$(OPTIMIZATION) -fomit-frame-pointer $(GCC_STACK_BOUNDRY) #-fstrict-aliasing -march=i386 -mcpu=i386 -malign-functions=0 -malign-jumps=0 +WARNINGS:=-Wall -Wstrict-prototypes -Wshadow +CFLAGS:=-I$(TOPDIR)include +ARFLAGS:=-r + +# +#-------------------------------------------------------- +# 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 $(DOLFS)),true) + # For large file summit support + CFLAGS+=-D_FILE_OFFSET_BITS=64 -D__USE_FILE_OFFSET64 +endif +ifeq ($(strip $(DODMALLOC)),true) + # For testing mem leaks with dmalloc + CFLAGS+=-DDMALLOC + LIBRARIES:=-ldmalloc + # Force debug=true, since this is useless when not debugging... + DODEBUG:=true +else + ifeq ($(strip $(DOEFENCE)),true) + LIBRARIES:=-lefence + # Force debug=true, since this is useless when not debugging... + DODEBUG:=true + endif +endif +ifeq ($(strip $(DODEBUG)),true) + CFLAGS +=$(WARNINGS) -g -D_GNU_SOURCE + LDFLAGS +=-Wl,-warn-common + STRIPCMD:=/bin/true -Not_stripping_since_we_are_debugging +else + CFLAGS += $(WARNINGS) $(OPTIMIZATIONS) -D_GNU_SOURCE + LDFLAGS += -s -Wl,-warn-common + STRIPCMD:=$(STRIP) --remove-section=.note --remove-section=.comment +endif +ifeq ($(strip $(DOSTATIC)),true) + 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) +ifndef $(PREFIX) + PREFIX:=`pwd`/_install +endif +# Additional complications due to support for pristine source dir. +# Include files in the build directory should take precedence over +# the copy in BB_SRC_DIR, both during the compilation phase and the +# shell script that finds the list of object files. +# Work in progress by <ldoolitt@recycle.lbl.gov>. # -# Rule to compile a set of .o files into one .o file -# -ifdef O_TARGET -$(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 $@).flags +CFLAGS += -DBB_VER='"$(VERSION)"' +CFLAGS += -DBB_BT='"$(BUILDTIME)"' +OBJECTS:=$(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 - -ifneq ($(wildcard $(TOPDIR)/.hdepend),) -include $(TOPDIR)/.hdepend -endif +.PHONY: dummy -# -# 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 = , -FILES_FLAGS_EXIST := $(wildcard .*.flags) -ifneq ($(FILES_FLAGS_EXIST),) -include $(FILES_FLAGS_EXIST) -endif +.EXPORT_ALL_VARIABLES: -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 |