# Rules.make for busybox
#
-# Copyright (C)
2001-2003 Erik Andersen <andersen@codepoet.org>
+# Copyright (C)
1999-2005 by 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
+# 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 $(top_builddir)/.config
+endif
+
#--------------------------------------------------------
PROG := busybox
-VERSION := 1.00-pre6
+MAJOR_VERSION :=1
+MINOR_VERSION :=1
+SUBLEVEL_VERSION:=1
+EXTRAVERSION :=-pre0
+VERSION :=$(MAJOR_VERSION).$(MINOR_VERSION).$(SUBLEVEL_VERSION)$(EXTRAVERSION)
BUILDTIME := $(shell TZ=UTC date -u "+%Y.%m.%d-%H:%M%z")
# With a modern GNU make(1) (highly recommended, that's what all the
# developers use), all of the following configuration values can be
# overridden at the command line. For example:
-# make CROSS=powerpc-linux- BB_SRC_DIR=$HOME/busybox PREFIX=/mnt/app
+# make CROSS=powerpc-linux- top_srcdir="$HOME/busybox" PREFIX=/mnt/app
#--------------------------------------------------------
# If you are running a cross compiler, you will want to set 'CROSS'
NM = $(CROSS)nm
STRIP = $(CROSS)strip
CPP = $(CC) -E
-MAKEFILES = $(TOPDIR).config
+# MAKEFILES = $(top_builddir)/.config
+RM = rm
+RM_F = $(RM) -f
+LN = ln
+LN_S = $(LN) -s
+MKDIR = mkdir
+MKDIR_P = $(MKDIR) -p
+MV = mv
+CP = cp
+
# What OS are you compiling busybox for? This allows you to include
# OS specific things, syscall overrides, etc.
HOSTCC = gcc
HOSTCFLAGS= -Wall -Wstrict-prototypes -O2 -fomit-frame-pointer
-# Ensure consistent sort order, 'gcc -print-search-dirs' behavior, etc.
+# Ensure consistent sort order, 'gcc -print-search-dirs' behavior, etc.
LC_ALL:= C
# If you want to add some simple compiler switches (like -march=i686),
# especially from the command line, use this instead of CFLAGS directly.
# For optimization overrides, it's better still to set OPTIMIZATION.
CFLAGS_EXTRA=$(subst ",, $(strip $(EXTRA_CFLAGS_OPTIONS)))
-
-# If you have a "pristine" source directory, point BB_SRC_DIR to it.
-# Experimental and incomplete; tell the mailing list
-# <busybox@busybox.net> if you do or don't like it so far.
-BB_SRC_DIR=
# To compile vs some other alternative libc, you may need to use/adjust
# the following lines to meet your needs...
# For other libraries, you are on your own. But these may (or may not) help...
#LDFLAGS+=-nostdlib
#LIBRARIES:=$(LIBCDIR)/lib/libc.a -lgcc
-#CROSS_CFLAGS+=-nostdinc -I$(LIBCDIR)/include -I$(GCCINCDIR)
+#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$(TOPDIR)include
-ARFLAGS=-r
+CFLAGS+=-I$(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__ | $(CC) -E -xc - | tail -n 1))
#--------------------------------------------------------
-export VERSION BUILDTIME TOPDIR HOSTCC HOSTCFLAGS CROSS CC AR AS LD NM STRIP CPP
+export VERSION BUILDTIME HOSTCC HOSTCFLAGS CROSS CC AR AS LD NM STRIP CPP
ifeq ($(strip $(TARGET_ARCH)),)
-TARGET_ARCH=$(shell $(CC) -dumpmachine | sed -e s'/-.*//' \
+TARGET_ARCH:=$(shell $(CC) -dumpmachine | sed -e s'/-.*//' \
-e 's/i.86/i386/' \
-e 's/sparc.*/sparc/' \
-e 's/arm.*/arm/g' \
)
endif
-# Pull in the user's busybox configuration
-ifeq ($(filter $(noconfig_targets),$(MAKECMDGOALS)),)
--include $(TOPDIR).config
+# A nifty macro to make testing gcc features easier
+check_gcc=$(shell \
+ if [ "$(1)" != "" ]; then \
+ if $(CC) $(1) -S -o /dev/null -xc /dev/null > /dev/null 2>&1; \
+ then echo "$(1)"; else echo "$(2)"; fi \
+ fi)
+
+# Setup some shortcuts so that silent mode is silent like it should be
+ifeq ($(subst s,,$(MAKEFLAGS)),$(MAKEFLAGS))
+export MAKE_IS_SILENT=n
+SECHO=@echo
+else
+export MAKE_IS_SILENT=y
+SECHO=-@false
endif
-# 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 "$(2)"; fi)
+#CFLAGS+=$(call check_gcc,-funsigned-char,)
+
+CFLAGS+=$(call check_gcc,-mmax-stack-frame=256,)
#--------------------------------------------------------
# Arch specific compiler optimization stuff should go here.
# for OPTIMIZATION...
# use '-Os' optimization if available, else use -O2
-OPTIMIZATION=
-OPTIMIZATION=${call check_gcc,-Os,-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 $$?)),0)
+ OPTIMIZATION+=$(call check_gcc,--combine,)
+endif
+OPTIMIZATION+=$(call check_gcc,-funit-at-a-time,)
+PROG_CFLAGS+=$(call check_gcc,-fwhole-program,)
+endif # CONFIG_BUILD_AT_ONCE
# Some nice architecture specific optimizations
ifeq ($(strip $(TARGET_ARCH)),arm)
OPTIMIZATION+=-fstrict-aliasing
+ OPTIMIZATION+=$(call check_gcc,-msingle-pic-base,)
endif
ifeq ($(strip $(TARGET_ARCH)),i386)
OPTIMIZATION+=$(call check_gcc,-march=i386,)
+# gcc-4.0 and older seem to suffer from these
+ifneq ($(strip $(shell [ $(CC_MAJOR) -ge 4 -a $(CC_MINOR) -ge 1 ] ; echo $$?)),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=$(OPTIMIZATION) -fomit-frame-pointer
+OPTIMIZATIONS:=$(OPTIMIZATION) -fomit-frame-pointer
#
#--------------------------------------------------------
# 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 $(CONFIG_LFS)),y)
# For large file summit support
STRIPCMD:=/bin/true -Not_stripping_since_we_are_debugging
else
CFLAGS+=$(WARNINGS) $(OPTIMIZATIONS) -D_GNU_SOURCE -DNDEBUG
- LDFLAGS += -s -Wl,-warn-common
- STRIPCMD:=$(STRIP) --remove-section=.note --remove-section=.comment
+ LDFLAGS += -Wl,-warn-common -Wl,--sort-common
+ STRIPCMD:=$(STRIP) -s --remove-section=.note --remove-section=.comment
endif
ifeq ($(strip $(CONFIG_STATIC)),y)
LDFLAGS += --static
+#else
+# LIBRARIES += -ldl
+endif
+
+ifeq ($(strip $(CONFIG_BUILD_LIBBUSYBOX)),y)
+ CFLAGS_PIC:= -fPIC #-DPIC
+endif
+
+ifeq ($(strip $(CONFIG_SELINUX)),y)
+ LIBRARIES += -lselinux
endif
ifeq ($(strip $(PREFIX)),)
# Additional complications due to support for pristine source dir.
# Include files in the build directory should take precedence over
-# the copy in BB_SRC_DIR, both during the compilation phase and the
+# the copy in top_srcdir, both during the compilation phase and the
# shell script that finds the list of object files.
# Work in progress by <ldoolitt@recycle.lbl.gov>.
-#
-ifneq ($(strip $(BB_SRC_DIR)),)
- VPATH:=$(BB_SRC_DIR)
-endif
+
OBJECTS:=$(APPLET_SOURCES:.c=.o) busybox.o usage.o applets.o
CFLAGS += $(CROSS_CFLAGS)
# have a chance of winning.
CFLAGS += $(CFLAGS_EXTRA)
-%.o: %.c
- $(CC) $(CFLAGS) $(EXTRA_CFLAGS) -c -o $@ $<
-
-ifdef _FASTDEP_ALL_SUB_DIRS
-fastdep: dummy
- $(TOPDIR)scripts/mkdep $(CFLAGS) $(EXTRA_CFLAGS_nostdinc) -- $(wildcard *.[chS]) > .depend
-ifdef ALL_SUB_DIRS
- $(MAKE) $(patsubst %,_sfdep_%,$(ALL_SUB_DIRS)) _FASTDEP_ALL_SUB_DIRS="$(ALL_SUB_DIRS)"
+#------------------------------------------------------------
+# Installation options
+ifeq ($(strip $(CONFIG_INSTALL_APPLET_HARDLINKS)),y)
+INSTALL_OPTS=--hardlinks
endif
-
-$(patsubst %,_sfdep_%,$(_FASTDEP_ALL_SUB_DIRS)):
- $(MAKE) -C $(patsubst _sfdep_%,%,$@) fastdep
+ifeq ($(strip $(CONFIG_INSTALL_APPLET_SYMLINKS)),y)
+INSTALL_OPTS=--symlinks
+endif
+ifeq ($(strip $(CONFIG_INSTALL_APPLET_DONT)),y)
+INSTALL_OPTS=
endif
.PHONY: dummy
-
-
-
-.EXPORT_ALL_VARIABLES:
-
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