# Rules.make for busybox
#
-# Copyright (C) 1999-200
4 by Erik Andersen <andersen@codepoet.org>
+# Copyright (C) 1999-200
5 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 $(top_builddir)/.config
+endif
+
#--------------------------------------------------------
PROG := busybox
-VERSION := 1.00
+MAJOR_VERSION :=1
+MINOR_VERSION :=1
+SUBLEVEL_VERSION:=1
+EXTRAVERSION :=-pre0
+VERSION :=$(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'
STRIP = $(CROSS)strip
CPP = $(CC) -E
# MAKEFILES = $(top_builddir)/.config
+RM = rm
+RM_F = $(RM) -f
+LN = ln
+LN_S = $(LN) -s
+MKDIR = mkdir
+MKDIR_P = $(MKDIR) -p
+MV = mv
+CP = cp
+
# What OS are you compiling busybox for? This allows you to include
# OS specific things, syscall overrides, etc.
# For optimization overrides, it's better still to set OPTIMIZATION.
CFLAGS_EXTRA=$(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$(top_builddir)/include -I$(top_srcdir)/include -I$(srcdir)
+CFLAGS+=-I$(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 $(CC) -dumpmachine | sed -e s'/-.*//' \
-e 's/i.86/i386/' \
)
endif
-# Pull in the user's busybox configuration
-ifeq ($(filter $(noconfig_targets),$(MAKECMDGOALS)),)
--include $(top_builddir)/.config
-endif
-
# A nifty macro to make testing gcc features easier
-check_gcc=$(shell if $(CC) $(1) -S -o /dev/null -xc /dev/null > /dev/null 2>&1; \
- then echo "$(1)"; else echo "$(2)"; fi)
+check_gcc=$(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)
+
+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:=${call check_gcc,-Os,-O2}
+OPTIMIZATION:=$(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 $$?)),0)
+ OPTIMIZATION+=$(call check_gcc,--combine,)
+endif
+OPTIMIZATION+=$(call check_gcc,-funit-at-a-time,)
+PROG_CFLAGS+=$(call check_gcc,-fwhole-program,)
+endif # CONFIG_BUILD_AT_ONCE
+
+LIB_LDFLAGS:=$(call check_ld,--enable-new-dtags,)
+#LIB_LDFLAGS+=$(call check_ld,--reduce-memory-overheads,)
+#LIB_LDFLAGS+=$(call check_ld,--as-needed,)
+#LIB_LDFLAGS+=$(call check_ld,--warn-shared-textrel,)
+
# Some nice architecture specific optimizations
ifeq ($(strip $(TARGET_ARCH)),arm)
endif
ifeq ($(strip $(TARGET_ARCH)),i386)
OPTIMIZATION+=$(call check_gcc,-march=i386,)
+# gcc-4.0 and older seem to suffer from these
+ifneq ($(strip $(shell [ $(CC_MAJOR) -ge 4 -a $(CC_MINOR) -ge 1 ] ; echo $$?)),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) $(call check_gcc,-fomit-frame-pointer,)
#
#--------------------------------------------------------
endif
ifeq ($(strip $(CONFIG_DEBUG)),y)
CFLAGS +=$(WARNINGS) -g -D_GNU_SOURCE
- LDFLAGS +=-Wl,-warn-common
+ LDFLAGS += $(call check_ld,--warn-common,)
STRIPCMD:=/bin/true -Not_stripping_since_we_are_debugging
else
CFLAGS+=$(WARNINGS) $(OPTIMIZATIONS) -D_GNU_SOURCE -DNDEBUG
- LDFLAGS += -s -Wl,-warn-common
- STRIPCMD:=$(STRIP) --remove-section=.note --remove-section=.comment
+ LDFLAGS += $(call check_ld,--warn-common,)
+ LDFLAGS += $(call check_ld,--sort-common,)
+ STRIPCMD:=$(STRIP) -s --remove-section=.note --remove-section=.comment
endif
ifeq ($(strip $(CONFIG_STATIC)),y)
- LDFLAGS += --static
+ PROG_CFLAGS += $(call check_gcc,-static,)
+endif
+CFLAGS_SHARED += $(call check_gcc,-shared,)
+LIB_CFLAGS+=$(CFLAGS_SHARED)
+
+ifeq ($(strip $(CONFIG_BUILD_LIBBUSYBOX)),y)
+ CFLAGS_PIC:= $(call check_gcc,-fPIC,)
+endif
+
+ifeq ($(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 += $(CFLAGS_EXTRA)
-.PHONY: dummy
+#------------------------------------------------------------
+# Installation options
+ifeq ($(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,$(MAKEFLAGS)),)
+export MAKE_IS_SILENT=y
+SECHO := @-false
+DISP := sil
+Q := @
+else
+ifneq ($(V)$(VERBOSE),)
+SECHO := @-false
+DISP := ver
+Q :=
+else
+SECHO := @echo
+DISP := pur
+Q := @
+endif
+endif
-.EXPORT_ALL_VARIABLES:
+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
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