mirror of
https://github.com/topjohnwu/ndk-busybox.git
synced 2024-12-02 16:56:32 +00:00
393 lines
13 KiB
Makefile
393 lines
13 KiB
Makefile
# Rules.make for busybox
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#
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# Copyright (C) 1999-2005 by Erik Andersen <andersen@codepoet.org>
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#
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# Licensed under GPLv2, see the file LICENSE in this tarball for details.
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#
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# Pull in the user's busybox configuration
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ifeq ($(filter $(noconfig_targets),$(MAKECMDGOALS)),)
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-include $(top_builddir)/.config
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endif
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ifeq ($(MAKELEVEL),0)
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ifeq ($(HAVE_DOT_CONFIG),y)
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rules-mak-rules:=0
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endif
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endif
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#--------------------------------------------------------
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PROG := busybox
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MAJOR_VERSION :=1
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MINOR_VERSION :=1
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SUBLEVEL_VERSION:=1
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EXTRAVERSION :=-pre0
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VERSION :=$(MAJOR_VERSION).$(MINOR_VERSION).$(SUBLEVEL_VERSION)$(EXTRAVERSION)
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BUILDTIME := $(shell TZ=UTC date -u "+%Y.%m.%d-%H:%M%z")
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#--------------------------------------------------------
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# With a modern GNU make(1) (highly recommended, that's what all the
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# developers use), all of the following configuration values can be
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# overridden at the command line. For example:
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# make CROSS=powerpc-linux- top_srcdir="$HOME/busybox" PREFIX=/mnt/app
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#--------------------------------------------------------
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# If you are running a cross compiler, you will want to set 'CROSS'
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# to something more interesting... Target architecture is determined
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# by asking the CC compiler what arch it compiles things for, so unless
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# your compiler is broken, you should not need to specify __TARGET_ARCH
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CROSS =$(subst ",, $(strip $(CROSS_COMPILER_PREFIX)))
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#")
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CC = $(CROSS)gcc
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AR = $(CROSS)ar
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AS = $(CROSS)as
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LD = $(CROSS)ld
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NM = $(CROSS)nm
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STRIP = $(CROSS)strip
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CPP = $(CC) -E
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SED ?= sed
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AWK ?= awk
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ifdef PACKAGE_BE_VERBOSE
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PACKAGE_BE_VERBOSE := $(shell echo $(PACKAGE_BE_VERBOSE) | $(SED) "s/[[:alpha:]]*//g")
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endif
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# for make V=3 and above make $(shell) invocations verbose
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ifeq ($(if $(strip $(PACKAGE_BE_VERBOSE)),$(shell test $(PACKAGE_BE_VERBOSE) -gt 2 ; echo $$?),1),0)
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SHELL+=-x
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MKDEP_ARGS:=-w
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endif
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# What OS are you compiling busybox for? This allows you to include
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# OS specific things, syscall overrides, etc.
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TARGET_OS=linux
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# Select the compiler needed to build binaries for your development system
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HOSTCC = gcc
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HOSTCFLAGS= -Wall -Wstrict-prototypes -O2 -fomit-frame-pointer
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# Ensure consistent sort order, 'gcc -print-search-dirs' behavior, etc.
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LC_ALL:= C
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# If you want to add some simple compiler switches (like -march=i686),
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# especially from the command line, use this instead of CFLAGS directly.
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# For optimization overrides, it's better still to set OPTIMIZATIONS.
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CFLAGS_EXTRA=$(subst ",, $(strip $(EXTRA_CFLAGS_OPTIONS)))
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#")
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# To compile vs some other alternative libc, you may need to use/adjust
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# the following lines to meet your needs...
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#
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# If you are using Red Hat 6.x with the compatible RPMs (for developing under
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# Red Hat 5.x and glibc 2.0) uncomment the following. Be sure to read about
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# using the compatible RPMs (compat-*) at http://www.redhat.com !
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#LIBCDIR:=/usr/i386-glibc20-linux
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#
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# For other libraries, you are on your own. But these may (or may not) help...
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#LDFLAGS+=-nostdlib
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#LIBRARIES:=$(LIBCDIR)/lib/libc.a -lgcc
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#CROSS_CFLAGS+=-nostdinc -I$(LIBCDIR)/include -I$(GCCINCDIR) -funsigned-char
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#GCCINCDIR:=$(shell gcc -print-search-dirs | sed -ne "s/install: \(.*\)/\1include/gp")
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WARNINGS=-Wall -Wstrict-prototypes -Wshadow
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CFLAGS+=-I$(top_builddir)/include -I$(top_srcdir)/include
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ARFLAGS=cruP
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# Get the CC MAJOR/MINOR version
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# gcc centric. Perhaps fiddle with findstring gcc,$(CC) for the rest
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CC_MAJOR:=$(shell printf "%02d" $(shell echo __GNUC__ | $(CC) -E -xc - | tail -n 1))
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CC_MINOR:=$(shell printf "%02d" $(shell echo __GNUC_MINOR__ | $(CC) -E -xc - | tail -n 1))
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# Note: spaces are significant here!
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# Check if CC version is equal to given MAJOR,MINOR. Returns empty if false.
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define cc_eq
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$(shell [ $(CC_MAJOR) -eq $(1) -a $(CC_MINOR) -eq $(2) ] && echo y)
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endef
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# Check if CC version is greater or equal than given MAJOR,MINOR
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define cc_ge
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$(shell [ $(CC_MAJOR) -ge $(1) -a $(CC_MINOR) -ge $(2) ] && echo y)
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endef
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# Check if CC version is less or equal than given MAJOR,MINOR
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define cc_le
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$(shell [ $(CC_MAJOR) -le $(1) -a $(CC_MINOR) -le $(2) ] && echo y)
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endef
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# Workaround bugs in make-3.80 for eval in conditionals
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define is_eq
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$(shell [ $(1) = $(2) ] 2> /dev/null && echo y)
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endef
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define is_neq
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$(shell [ $(1) != $(2) ] 2> /dev/null && echo y)
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endef
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#--------------------------------------------------------
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export VERSION BUILDTIME HOSTCC HOSTCFLAGS CROSS CC AR AS LD NM STRIP CPP
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# TARGET_ARCH and TARGET_MACH will be passed verbatim to CC with recent
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# versions of make, so we use __TARGET_ARCH here.
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# Current builtin rules looks like that:
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# COMPILE.s = $(AS) $(ASFLAGS) $(TARGET_MACH)
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# COMPILE.c = $(CC) $(CFLAGS) $(CPPFLAGS) $(TARGET_ARCH) -c
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ifeq ($(strip $(__TARGET_ARCH)),)
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__TARGET_ARCH:=$(shell $(CC) -dumpmachine | sed -e s'/-.*//' \
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-e 's/i.86/i386/' \
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-e 's/sparc.*/sparc/' \
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-e 's/arm.*/arm/g' \
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-e 's/m68k.*/m68k/' \
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-e 's/ppc/powerpc/g' \
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-e 's/v850.*/v850/g' \
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-e 's/sh[234]/sh/' \
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-e 's/mips-.*/mips/' \
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-e 's/mipsel-.*/mipsel/' \
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-e 's/cris.*/cris/' \
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)
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endif
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$(call check_gcc,CFLAGS,-funsigned-char,)
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$(call check_gcc,CFLAGS,-mmax-stack-frame=256,)
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#--------------------------------------------------------
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# Arch specific compiler optimization stuff should go here.
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# Unless you want to override the defaults, do not set anything
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# for OPTIMIZATIONS...
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# use '-Os' optimization if available, else use -O2
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$(call check_gcc,OPTIMIZATIONS,-Os,-O2)
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# gcc 2.95 exits with 0 for "unrecognized option"
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$(if $(call is_eq,$(CONFIG_BUILD_AT_ONCE),y),\
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$(if $(call cc_ge,3,0),\
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$(call check_gcc,CFLAGS_COMBINE,--combine,)))
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$(if $(call is_eq,$(CONFIG_BUILD_AT_ONCE),y),\
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$(call check_gcc,OPTIMIZATIONS,-funit-at-a-time,))
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# http://gcc.gnu.org/bugzilla/show_bug.cgi?id=25795
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#$(if $(call is_eq,$(CONFIG_BUILD_AT_ONCE),y),\
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# $(call check_gcc,PROG_CFLAGS,-fwhole-program,))
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$(call check_ld,LIB_LDFLAGS,--enable-new-dtags,)
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#$(call check_ld,LIB_LDFLAGS,--reduce-memory-overheads,)
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#$(call check_ld,LIB_LDFLAGS,--as-needed,)
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#$(call check_ld,LIB_LDFLAGS,--warn-shared-textrel,)
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$(call check_ld,PROG_LDFLAGS,--gc-sections,)
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# Some nice architecture specific optimizations
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ifeq ($(__TARGET_ARCH),arm)
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OPTIMIZATIONS+=-fstrict-aliasing
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endif # arm
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$(if $(call is_eq,$(__TARGET_ARCH),i386),\
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$(call check_gcc,OPTIMIZATIONS,-march=i386,))
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# gcc-4.0 and older seem to suffer from these
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$(if $(call cc_le,4,0),\
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$(call check_gcc,OPTIMIZATIONS,-mpreferred-stack-boundary=2,)\
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$(call check_gcc,OPTIMIZATIONS,-falign-functions=1 -falign-jumps=1 -falign-loops=1,\
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-malign-functions=0 -malign-jumps=0 -malign-loops=0))
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# gcc-4.1 and beyond seem to benefit from these
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# turn off flags which hurt -Os
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$(if $(call cc_ge,4,1),\
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$(call check_gcc,OPTIMIZATIONS,-fno-tree-loop-optimize,)\
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$(call check_gcc,OPTIMIZATIONS,-fno-tree-dominator-opts,)\
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$(call check_gcc,OPTIMIZATIONS,-fno-strength-reduce,)\
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\
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$(call check_gcc,OPTIMIZATIONS,-fno-branch-count-reg,))
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$(call check_gcc,OPTIMIZATIONS,-fomit-frame-pointer,)
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#
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#--------------------------------------------------------
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# If you're going to do a lot of builds with a non-vanilla configuration,
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# it makes sense to adjust parameters above, so you can type "make"
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# by itself, instead of following it by the same half-dozen overrides
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# every time. The stuff below, on the other hand, is probably less
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# prone to casual user adjustment.
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#
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ifeq ($(CONFIG_LFS),y)
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# For large file summit support
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CFLAGS+=-D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE -D_FILE_OFFSET_BITS=64
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endif
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ifeq ($(CONFIG_DMALLOC),y)
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# For testing mem leaks with dmalloc
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CFLAGS+=-DDMALLOC
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LIBRARIES:=-ldmalloc
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else
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ifeq ($(CONFIG_EFENCE),y)
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LIBRARIES:=-lefence
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endif
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endif
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$(if $(call is_eq,$(CONFIG_DEBUG),y),\
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$(call check_ld,LDFLAGS,--warn-common,),\
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$(call check_ld,LDFLAGS,--warn-common,)$(call check_ld,LDFLAGS,--sort-common,))
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ifeq ($(CONFIG_DEBUG),y)
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CFLAGS +=$(WARNINGS) -g -D_GNU_SOURCE
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STRIPCMD:=/bin/true -Not_stripping_since_we_are_debugging
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else
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CFLAGS+=$(WARNINGS) $(OPTIMIZATIONS) -D_GNU_SOURCE -DNDEBUG
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STRIPCMD:=$(STRIP) -s --remove-section=.note --remove-section=.comment
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endif
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$(if $(call is_eq,$(CONFIG_STATIC),y),\
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$(call check_gcc,PROG_CFLAGS,-static,))
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$(call check_gcc,CFLAGS_SHARED,-shared,)
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LIB_CFLAGS+=$(CFLAGS_SHARED)
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$(if $(call is_eq,$(CONFIG_BUILD_LIBBUSYBOX),y),\
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$(call check_gcc,CFLAGS_PIC,-fPIC,))
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ifeq ($(CONFIG_SELINUX),y)
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LIBRARIES += -lselinux
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endif
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ifeq ($(strip $(PREFIX)),)
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PREFIX:=`pwd`/_install
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endif
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CFLAGS += $(CROSS_CFLAGS)
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ifdef BB_INIT_SCRIPT
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CFLAGS += -DINIT_SCRIPT='"$(BB_INIT_SCRIPT)"'
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endif
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# Put user-supplied flags at the end, where they
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# have a chance of winning.
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CFLAGS += $(CFLAGS_EXTRA)
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#------------------------------------------------------------
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# Installation options
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ifeq ($(strip $(CONFIG_INSTALL_APPLET_HARDLINKS)),y)
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INSTALL_OPTS=--hardlinks
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endif
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ifeq ($(strip $(CONFIG_INSTALL_APPLET_SYMLINKS)),y)
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INSTALL_OPTS=--symlinks
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endif
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ifeq ($(strip $(CONFIG_INSTALL_APPLET_DONT)),y)
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INSTALL_OPTS=
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endif
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#------------------------------------------------------------
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# object extensions
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# object potentially used in shared object
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ifeq ($(strip $(CONFIG_BUILD_LIBBUSYBOX)),y)
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# single-object extension
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os:=.os
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# multi-object extension
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om:=.osm
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else
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os:=.o
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om:=.om
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endif
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#------------------------------------------------------------
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# Make the output nice and tight
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# for make V=2 and above, do print directory
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ifneq ($(shell test -n "$(strip $(PACKAGE_BE_VERBOSE))" && test $(PACKAGE_BE_VERBOSE) -gt 1 ; echo $$?),0)
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MAKEFLAGS += --no-print-directory
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endif
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export MAKEOVERRIDES
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export MAKE_IS_SILENT=n
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ifneq ($(findstring s,$(MAKEFLAGS)),)
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export MAKE_IS_SILENT=y
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DISP := sil
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Q := @
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else
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ifneq ($(V)$(VERBOSE),)
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DISP := ver
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Q :=
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else
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DISP := pur
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Q := @
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endif
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endif
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define show_objs
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$(subst $(top_builddir)/,,$(subst ../,,$@))
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endef
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pur_disp_compile.c = @echo " "CC $(show_objs) ;
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pur_disp_compile.h = @echo " "HOSTCC $(show_objs) ;
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pur_disp_strip = @echo " "STRIP $(show_objs) ;
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pur_disp_link = @echo " "LINK $(show_objs) ;
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pur_disp_link.h = @echo " "HOSTLINK $(show_objs) ;
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pur_disp_ar = @echo " "AR $(ARFLAGS) $(show_objs) ;
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pur_disp_gen = @echo " "GEN $@ ;
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pur_disp_doc = @echo " "DOC $(subst docs/,,$@) ;
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pur_disp_bin = @echo " "BIN $(show_objs) ;
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sil_disp_compile.c = @
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sil_disp_compile.h = @
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sil_disp_strip = @
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sil_disp_link = @
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sil_disp_link.h = @
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sil_disp_ar = @
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sil_disp_gen = @
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sil_disp_doc = @
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sil_disp_bin = @
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ver_disp_compile.c =
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ver_disp_compile.h =
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ver_disp_strip =
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ver_disp_link =
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ver_disp_link.h =
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ver_disp_ar =
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ver_disp_gen =
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ver_disp_doc =
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ver_disp_bin =
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disp_compile.c = $($(DISP)_disp_compile.c)
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disp_compile.h = $($(DISP)_disp_compile.h)
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disp_strip = $($(DISP)_disp_strip)
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disp_link = $($(DISP)_disp_link)
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disp_link.h = $($(DISP)_disp_link.h)
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disp_ar = $($(DISP)_disp_ar)
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disp_gen = $($(DISP)_disp_gen)
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disp_doc = $($(DISP)_disp_doc)
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disp_bin = $($(DISP)_disp_bin)
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# CFLAGS-dir == $(CFLAGS-$(notdir $(@D)))
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# CFLAGS-dir-file.o == $(CFLAGS-$(notdir $(@D))-$(notdir $(@F)))
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# CFLAGS-dir-file.c == $(CFLAGS-$(notdir $(<D))-$(notdir $(<F)))
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# all prerequesites == $(foreach fil,$^,$(CFLAGS-$(notdir $(patsubst %/$,%,$(dir $(fil))))-$(notdir $(fil))))
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cmd_compile.c = $(CC) $(CFLAGS) $(EXTRA_CFLAGS) -I$(srcdir) -c -o $@ $< \
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$(foreach f,$^,$(CFLAGS-$(notdir $(patsubst %/$,%,$(dir $(f))))-$(notdir $(f)))) \
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$(CFLAGS-$(notdir $(@D))-$(notdir $(@F))) \
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$(CFLAGS-$(notdir $(@D)))
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cmd_compile.m = $(cmd_compile.c) -DL_$(patsubst %$(suffix $(notdir $@)),%,$(notdir $@))
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cmd_compile.h = $(HOSTCC) $(HOSTCFLAGS) -c -o $@ $<
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cmd_strip = $(STRIPCMD) $@
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cmd_link = $(CC) $(CFLAGS) $(EXTRA_CFLAGS) -I$(srcdir) $(LDFLAGS)
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cmd_link.h = $(HOSTCC) $(HOSTCFLAGS) $(HOST_LDFLAGS) $^ -o $@
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cmd_ar = $(AR) $(ARFLAGS) $@ $^
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compile.c = $(disp_compile.c) $(cmd_compile.c)
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compile.m = $(disp_compile.c) $(cmd_compile.m)
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compile.h = $(disp_compile.h) $(cmd_compile.h)
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do_strip = $(disp_strip) $(cmd_strip)
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do_link = $(disp_link) $(cmd_link)
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do_link.h = $(disp_link.h) $(cmd_link.h)
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do_ar = $(disp_ar) $(cmd_ar)
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ifdef rules-mak-rules
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.SUFFIXES: .c .S .o .os .om .osm .oS .so .a .s .i .E
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# generic rules
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%.o: %.c ; $(compile.c)
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%.os: %.c ; $(compile.c) $(CFLAGS_PIC)
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%.o: ; $(compile.c)
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%.os: ; $(compile.c) $(CFLAGS_PIC)
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%.om: ; $(compile.m)
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%.osm: ; $(compile.m) $(CFLAGS_PIC)
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endif # rules-mak-rules
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.PHONY: dummy
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