- add target hosttools (see make help)
- rename check_gcc to check_cc and pass the CC to use as arg#1; peruse check_cc for HOSTCFLAGS
- add and use check_strip
- add checks for {,no-}whole-archive and {start,end}-group LD flags
This commit is contained in:
Bernhard Reutner-Fischer
parent
6d0dbeb550
commit
e28d1d6fdc
34
Makefile
34
Makefile
@ -8,7 +8,7 @@
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#--------------------------------------------------------------
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# You shouldn't need to mess with anything beyond this point...
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#--------------------------------------------------------------
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noconfig_targets := menuconfig config oldconfig randconfig \
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noconfig_targets := menuconfig config oldconfig randconfig hosttools \
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defconfig allyesconfig allnoconfig allbareconfig \
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clean distclean help \
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release tags
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@ -126,6 +126,10 @@ help:
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@echo ' defconfig - set .config to largest generic configuration'
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@echo ' menuconfig - interactive curses-based configurator'
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@echo ' oldconfig - resolve any unresolved symbols in .config'
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@echo ' hosttools - build sed for the host.'
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@echo ' You can use these commands if the commands on the host'
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@echo ' is unusable. Afterwards use it like:'
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@echo ' make SED="$(top_builddir)/sed"'
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@echo
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@echo 'Installation:'
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@echo ' install - install busybox into $(PREFIX)'
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@ -210,6 +214,18 @@ allbareconfig: scripts/config/conf
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@echo "CONFIG_FEATURE_BUFFERS_GO_ON_STACK=y" >> .config
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@yes n | ./scripts/config/conf -o $(CONFIG_CONFIG_IN) > /dev/null
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hosttools:
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$(Q)cp .config .config.bak || noold=yea
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$(Q)$(MAKE) CC="$(HOSTCC)" CFLAGS="$(HOSTCFLAGS) $(INCS)" allnoconfig
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$(Q)mv .config .config.in
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$(Q)(grep -v CONFIG_SED .config.in ; \
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echo "CONFIG_SED=y" ; ) > .config
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$(Q)$(MAKE) CC="$(HOSTCC)" CFLAGS="$(HOSTCFLAGS) $(INCS)" oldconfig include/bb_config.h
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$(Q)$(MAKE) CC="$(HOSTCC)" CFLAGS="$(HOSTCFLAGS) $(INCS)" busybox
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$(Q)[ -f .config.bak ] && mv .config.bak .config || rm .config
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mv busybox sed
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@echo "Now do: $(MAKE) SED=$(top_builddir)/sed <target>"
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else # ifneq ($(strip $(HAVE_DOT_CONFIG)),y)
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all: busybox busybox.links doc
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@ -287,9 +303,9 @@ endif
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-Wl,-soname=$(LD_LIBBUSYBOX).$(MAJOR_VERSION) \
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-Wl,-z,combreloc $(LIB_LDFLAGS) \
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-o $(@) \
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-Wl,--start-group -Wl,--whole-archive \
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$(LD_START_GROUP) $(LD_WHOLE_ARCHIVE) \
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$(LIBRARY_DEFINE) $(^) \
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-Wl,--no-whole-archive -Wl,--end-group
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$(LD_NO_WHOLE_ARCHIVE) $(LD_END_GROUP)
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@rm -f $(DO_INSTALL_LIBS)
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@for i in $(DO_INSTALL_LIBS); do ln -s $(@) $$i ; done
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$(do_strip)
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@ -298,11 +314,11 @@ endif # ifeq ($(strip $(CONFIG_BUILD_LIBBUSYBOX)),y)
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busybox_unstripped: .depend $(LIBBUSYBOX_SONAME) $(BUSYBOX_SRC) $(APPLET_SRC) $(libraries-y)
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$(do_link) $(PROG_CFLAGS) $(PROG_LDFLAGS) $(CFLAGS_COMBINE) \
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-o $@ -Wl,--start-group \
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-o $@ $(LD_START_GROUP) \
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$(APPLETS_DEFINE) $(APPLET_SRC) \
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$(BUSYBOX_DEFINE) $(BUSYBOX_SRC) $(libraries-y) \
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$(LDBUSYBOX) $(LIBRARIES) \
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-Wl,--end-group
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$(LD_END_GROUP)
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busybox: busybox_unstripped
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$(Q)cp busybox_unstripped busybox
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@ -349,8 +365,8 @@ ifneq ($(strip $(KBUILD_VERBOSE)),)
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# ARFLAGS+=v
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endif
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check test: busybox
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bindir=$(top_builddir) srcdir=$(top_srcdir)/testsuite \
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$(top_srcdir)/testsuite/runtest $(CHECK_VERBOSE)
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bindir=$(top_builddir) srcdir=$(top_srcdir)/testsuite SED="$(SED)" \
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$(SHELL) $(top_srcdir)/testsuite/runtest $(CHECK_VERBOSE)
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.PHONY: checkhelp
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checkhelp:
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@ -422,7 +438,7 @@ $(USAGE_BIN): $(top_srcdir)/scripts/usage.c
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DEP_INCLUDES += include/usage_compressed.h
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include/usage_compressed.h: .config $(USAGE_BIN)
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$(Q)$(SHELL) $(top_srcdir)/scripts/usage_compressed "$(top_builddir)/scripts" > $@
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$(Q)SED="$(SED)" $(SHELL) $(top_srcdir)/scripts/usage_compressed "$(top_builddir)/scripts" > $@
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endif # CONFIG_FEATURE_COMPRESS_USAGE
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# workaround alleged bug in make-3.80, make-3.81
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@ -486,4 +502,4 @@ tags:
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endif # ifeq ($(skip-makefile),)
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.PHONY: dummy subdirs release distclean clean config oldconfig \
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menuconfig tags check test depend dep buildtree
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menuconfig tags check test depend dep buildtree hosttools
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169
Rules.mak
169
Rules.mak
@ -31,7 +31,8 @@ BUILDTIME := $(shell TZ=UTC date -u "+%Y.%m.%d-%H:%M%z")
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# to something more interesting... Target architecture is determined
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# by asking the CC compiler what arch it compiles things for, so unless
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# your compiler is broken, you should not need to specify TARGET_ARCH
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CROSS =$(subst ",, $(strip $(CROSS_COMPILER_PREFIX)))
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CROSS =$(strip $(subst ",, $(strip $(CROSS_COMPILER_PREFIX))))
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# be gentle to vi coloring.. "))
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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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@ -41,16 +42,13 @@ STRIP = $(CROSS)strip
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ELF2FLT = $(CROSS)elf2flt
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CPP = $(CC) -E
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SED ?= sed
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BZIP2 ?= bzip2
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# What OS are you compiling busybox for? This allows you to include
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# OS specific things, syscall overrides, etc.
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TARGET_OS=linux
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# Select the compiler needed to build binaries for your development system
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HOSTCC = gcc
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HOSTCFLAGS= -Wall -Wstrict-prototypes -O2 -fomit-frame-pointer
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# Ensure consistent sort order, 'gcc -print-search-dirs' behavior, etc.
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LC_ALL:= C
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@ -71,7 +69,7 @@ CFLAGS_EXTRA=$(subst ",, $(strip $(EXTRA_CFLAGS_OPTIONS)))
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#LDFLAGS+=-nostdlib
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#LIBRARIES:=$(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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#GCCINCDIR:=$(shell gcc -print-search-dirs | $(SED) -ne "s/install: \(.*\)/\1include/gp")
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# This must bind late because srcdir is reset for every source subdirectory.
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INCS:=-I$(top_builddir)/include -I$(top_srcdir)/include
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@ -79,11 +77,6 @@ CFLAGS=$(INCS) -I$(srcdir) -D_GNU_SOURCE
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CFLAGS+=$(CHECKED_CFLAGS)
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ARFLAGS=cru
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# Warnings
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CFLAGS += -Wall -Wstrict-prototypes -Wshadow
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LDFLAGS += $(call check_ld,--warn-common,)
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# gcc centric. Perhaps fiddle with findstring gcc,$(CC) for the rest
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# get the CC MAJOR/MINOR version
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CC_MAJOR:=$(shell printf "%02d" $(shell echo __GNUC__ | $(CC) -E -xc - | tail -n 1))
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@ -92,7 +85,7 @@ CC_MINOR:=$(shell printf "%02d" $(shell echo __GNUC_MINOR__ | $(CC) -E -xc - | t
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#--------------------------------------------------------
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export VERSION BUILDTIME HOSTCC HOSTCFLAGS CROSS CC AR AS LD NM STRIP CPP
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ifeq ($(strip $(TARGET_ARCH)),)
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TARGET_ARCH:=$(shell $(CC) -dumpmachine | sed -e s'/-.*//' \
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TARGET_ARCH:=$(shell $(CC) -dumpmachine | $(SED) -e s'/-.*//' \
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-e 's/i.86/i386/' \
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-e 's/sparc.*/sparc/' \
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-e 's/arm.*/arm/g' \
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@ -107,27 +100,90 @@ TARGET_ARCH:=$(shell $(CC) -dumpmachine | sed -e s'/-.*//' \
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endif
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# A nifty macro to make testing gcc features easier, but note that everything
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# that uses this _must_ use := or it will be re-evaluated for every file.
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# that uses this _must_ use := or it will be re-evaluated everytime it is
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# referenced.
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ifeq ($(strip $(V)),2)
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VERBOSE_CHECK_GCC=echo check_gcc $(1) >> /dev/stderr;
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VERBOSE_CHECK_CC=echo CC=\"$(1)\" check_cc $(2) >&2;
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endif
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check_gcc=$(shell \
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$(VERBOSE_CHECK_GCC)\
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if [ "$(1)" != "" ]; then \
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if $(CC) $(1) -S -o /dev/null -xc /dev/null > /dev/null 2>&1; \
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then echo "$(1)"; else echo "$(2)"; fi \
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check_cc=$(shell \
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$(VERBOSE_CHECK_CC) \
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if [ "x$(1)" != "x" ] && [ "x$(2)" != "x" ]; then \
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echo "int i;" > ./conftest.c; \
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if $(1) $(2) -c -o conftest.o conftest.c > /dev/null 2>&1; \
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then echo "$(2)"; else echo "$(3)"; fi ; \
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rm -f conftest.c conftest.o; \
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fi)
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# A not very robust macro to check for available ld flags
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ifeq ($(strip $(V)),2)
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VERBOSE_CHECK_LD=echo LD=\"$(1)\" check_ld $(2) >&2;
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endif
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check_ld=$(shell \
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if [ "x$(1)" != "x" ]; then \
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$(LD) --help | grep -q "\$(1)" && echo "-Wl,$(1)" ; \
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$(VERBOSE_CHECK_LD) \
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if [ "x$(1)" != "x" ] && [ "x$(2)" != "x" ]; then \
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$(1) -o /dev/null -b binary /dev/null > /dev/null 2>&1 && \
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echo "-Wl,$(2)" ; \
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fi)
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# A not very robust macro to check for available strip flags
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ifeq ($(strip $(V)),2)
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VERBOSE_CHECK_STRIP=echo STRIPCMD=\"$(1)\" check_strip $(2) >&2;
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endif
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check_strip=$(shell \
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$(VERBOSE_CHECK_STRIP) \
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if [ "x$(1)" != "x" ] && [ "x$(2)" != "x" ]; then \
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echo "int i;" > ./conftest.c ; \
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$(CC) -c -o conftest.o conftest.c > /dev/null 2>&1 ; \
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$(1) $(2) conftest.o > /dev/null 2>&1 && \
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echo "$(1) $(2)" || echo "$(3)"; \
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rm -f conftest.c conftest.o > /dev/null 2>&1 ; \
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fi)
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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:=$(call check_cc,$(HOSTCC),-Wall,)
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HOSTCFLAGS+=$(call check_cc,$(HOSTCC),-Wstrict-prototypes,)
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HOSTCFLAGS+=$(call check_cc,$(HOSTCC),-O2,)
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HOSTCFLAGS+=$(call check_cc,$(HOSTCC),-fomit-frame-pointer,)
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LD_WHOLE_ARCHIVE:=$(shell echo "int i;" > conftest.c ; \
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$(CC) -c -o conftest.o conftest.c ; \
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echo "int main(void){return 0;}" > conftest_main.c ; \
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$(CC) -c -o conftest_main.o conftest_main.c ; \
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$(AR) $(ARFLAGS) conftest.a conftest.o ; \
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$(CC) -Wl,--whole-archive conftest.a -Wl,--no-whole-archive \
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conftest_main.o -o conftest > /dev/null 2>&1 \
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&& echo "-Wl,--whole-archive" ; \
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rm conftest_main.o conftest_main.c conftest.o conftest.c \
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conftest.a conftest > /dev/null 2>&1 ; )
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ifneq ($(findstring whole-archive,$(LD_WHOLE_ARCHIVE)),)
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LD_NO_WHOLE_ARCHIVE:= -Wl,--no-whole-archive
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endif
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LD_START_GROUP:=$(shell echo "int bar(void){return 0;}" > conftest.c ; \
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$(CC) -c -o conftest.o conftest.c ; \
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echo "int main(void){return bar();}" > conftest_main.c ; \
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$(CC) -c -o conftest_main.o conftest_main.c ; \
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$(AR) $(ARFLAGS) conftest.a conftest.o ; \
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$(CC) -Wl,--start-group conftest.a conftest_main.o -Wl,--end-group \
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-o conftest > /dev/null 2>&1 && echo "-Wl,--start-group" ; \
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echo rm conftest_main.o conftest_main.c conftest.o conftest.c \
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conftest.a conftest > /dev/null 2>&1 ; )
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ifneq ($(findstring start-group,$(LD_START_GROUP)),)
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LD_END_GROUP:= -Wl,--end-group
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endif
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CHECKED_LDFLAGS := $(call check_ld,$(LD),--warn-common,)
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# Pin CHECKED_CFLAGS with := so it's only evaluated once.
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CHECKED_CFLAGS:=$(call check_gcc,-funsigned-char,)
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CHECKED_CFLAGS+=$(call check_gcc,-mmax-stack-frame=256,)
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CHECKED_CFLAGS+=$(call check_gcc,-fno-builtin-strlen)
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CHECKED_CFLAGS:=$(call check_cc,$(CC),-Wall,)
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CHECKED_CFLAGS+=$(call check_cc,$(CC),-Wstrict-prototypes,)
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CHECKED_CFLAGS+=$(call check_cc,$(CC),-Wshadow,)
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CHECKED_CFLAGS+=$(call check_cc,$(CC),-funsigned-char,)
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CHECKED_CFLAGS+=$(call check_cc,$(CC),-mmax-stack-frame=256,)
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CHECKED_CFLAGS+=$(call check_cc,$(CC),-fno-builtin-strlen)
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# Preemptively pin this too.
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PROG_CFLAGS:=
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@ -139,26 +195,26 @@ PROG_CFLAGS:=
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# for OPTIMIZATION...
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# use '-Os' optimization if available, else use -O2
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OPTIMIZATION:=$(call check_gcc,-Os,-O2)
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OPTIMIZATION:=$(call check_cc,$(CC),-Os,-O2)
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ifeq ($(CONFIG_BUILD_AT_ONCE),y)
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# gcc 2.95 exits with 0 for "unrecognized option"
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ifeq ($(strip $(shell [ $(CC_MAJOR) -ge 3 ] ; echo $$?)),0)
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CFLAGS_COMBINE:=$(call check_gcc,--combine,)
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CFLAGS_COMBINE:=$(call check_cc,$(CC),--combine,)
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endif
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OPTIMIZATION+=$(call check_gcc,-funit-at-a-time,)
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OPTIMIZATION+=$(call check_gcc,-fgcse-after-reload,)
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OPTIMIZATION+=$(call check_cc,$(CC),-funit-at-a-time,)
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OPTIMIZATION+=$(call check_cc,$(CC),-fgcse-after-reload,)
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ifneq ($(CONFIG_BUILD_LIBBUSYBOX),y)
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# http://gcc.gnu.org/bugzilla/show_bug.cgi?id=25795
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# This prevents us from using -fwhole-program when we build the lib
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PROG_CFLAGS+=$(call check_gcc,-fwhole-program,)
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PROG_CFLAGS+=$(call check_cc,$(CC),-fwhole-program,)
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endif # CONFIG_BUILD_LIBBUSYBOX
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endif # CONFIG_BUILD_AT_ONCE
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LIB_LDFLAGS:=$(call check_ld,--enable-new-dtags,)
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#LIB_LDFLAGS+=$(call check_ld,--reduce-memory-overheads,)
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#LIB_LDFLAGS+=$(call check_ld,--as-needed,)
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#LIB_LDFLAGS+=$(call check_ld,--warn-shared-textrel,)
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LIB_LDFLAGS:=$(call check_ld,$(LD),--enable-new-dtags,)
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#LIB_LDFLAGS+=$(call check_ld,$(LD),--reduce-memory-overheads,)
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#LIB_LDFLAGS+=$(call check_ld,$(LD),--as-needed,)
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#LIB_LDFLAGS+=$(call check_ld,$(LD),--warn-shared-textrel,)
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|
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|
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# Some nice architecture specific optimizations
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@ -166,25 +222,25 @@ ifeq ($(strip $(TARGET_ARCH)),arm)
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OPTIMIZATION+=-fstrict-aliasing
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endif
|
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ifeq ($(strip $(TARGET_ARCH)),i386)
|
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OPTIMIZATION+=$(call check_gcc,-march=i386,)
|
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OPTIMIZATION+=$(call check_cc,$(CC),-march=i386,)
|
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# gcc-4.0 and older seem to benefit from these
|
||||
#ifneq ($(strip $(shell [ $(CC_MAJOR) -ge 4 -a $(CC_MINOR) -ge 1 ] ; echo $$?)),0)
|
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OPTIMIZATION+=$(call check_gcc,-mpreferred-stack-boundary=2,)
|
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OPTIMIZATION+=$(call check_gcc,-falign-functions=1 -falign-jumps=1 -falign-loops=1,\
|
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OPTIMIZATION+=$(call check_cc,$(CC),-mpreferred-stack-boundary=2,)
|
||||
OPTIMIZATION+=$(call check_cc,$(CC),-falign-functions=1 -falign-jumps=1 -falign-loops=1,\
|
||||
-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
|
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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_cc,$(CC),-fno-tree-loop-optimize,)
|
||||
OPTIMIZATION+=$(call check_cc,$(CC),-fno-tree-dominator-opts,)
|
||||
OPTIMIZATION+=$(call check_cc,$(CC),-fno-strength-reduce,)
|
||||
|
||||
OPTIMIZATION+=$(call check_gcc,-fno-branch-count-reg,)
|
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OPTIMIZATION+=$(call check_cc,$(CC),-fno-branch-count-reg,)
|
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endif # gcc-4.1 and beyond
|
||||
endif
|
||||
OPTIMIZATION+=$(call check_gcc,-fomit-frame-pointer,)
|
||||
OPTIMIZATION+=$(call check_cc,$(CC),-fomit-frame-pointer,)
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||||
|
||||
#
|
||||
#--------------------------------------------------------
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@ -215,7 +271,7 @@ ifeq ($(strip $(CONFIG_DEBUG)),y)
|
||||
CFLAGS +=-g
|
||||
else
|
||||
CFLAGS +=-DNDEBUG
|
||||
LDFLAGS += $(call check_ld,--sort-common,)
|
||||
CHECKED_LDFLAGS += $(call check_ld,$(LD),--sort-common,)
|
||||
endif
|
||||
|
||||
ifneq ($(strip $(CONFIG_DEBUG_PESSIMIZE)),y)
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@ -224,27 +280,26 @@ endif
|
||||
|
||||
# warn a bit more verbosely for non-release versions
|
||||
ifneq ($(EXTRAVERSION),)
|
||||
CHECKED_CFLAGS+=$(call check_gcc,-Wstrict-prototypes,)
|
||||
CHECKED_CFLAGS+=$(call check_gcc,-Wmissing-prototypes,)
|
||||
CHECKED_CFLAGS+=$(call check_gcc,-Wmissing-declarations,)
|
||||
CHECKED_CFLAGS+=$(call check_gcc,-Wunused,)
|
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CHECKED_CFLAGS+=$(call check_gcc,-Winit-self,)
|
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CHECKED_CFLAGS+=$(call check_gcc,-Wshadow,)
|
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CHECKED_CFLAGS+=$(call check_gcc,-Wcast-align,)
|
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CHECKED_CFLAGS+=$(call check_cc,$(CC),-Wstrict-prototypes,)
|
||||
CHECKED_CFLAGS+=$(call check_cc,$(CC),-Wmissing-prototypes,)
|
||||
CHECKED_CFLAGS+=$(call check_cc,$(CC),-Wmissing-declarations,)
|
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CHECKED_CFLAGS+=$(call check_cc,$(CC),-Wunused,)
|
||||
CHECKED_CFLAGS+=$(call check_cc,$(CC),-Winit-self,)
|
||||
CHECKED_CFLAGS+=$(call check_cc,$(CC),-Wshadow,)
|
||||
CHECKED_CFLAGS+=$(call check_cc,$(CC),-Wcast-align,)
|
||||
endif
|
||||
STRIPCMD:=$(STRIP) -s --remove-section=.note --remove-section=.comment
|
||||
STRIPCMD:=$(call check_strip,$(STRIP),-s --remove-section=.note --remove-section=.comment,$(STRIP))
|
||||
ifeq ($(strip $(CONFIG_STATIC)),y)
|
||||
PROG_CFLAGS += $(call check_gcc,-static,)
|
||||
PROG_CFLAGS += $(call check_cc,$(CC),-static,)
|
||||
endif
|
||||
CFLAGS_SHARED := $(call check_gcc,-shared,)
|
||||
CFLAGS_SHARED := $(call check_cc,$(CC),-shared,)
|
||||
LIB_CFLAGS+=$(CFLAGS_SHARED)
|
||||
|
||||
ifeq ($(strip $(CONFIG_BUILD_LIBBUSYBOX)),y)
|
||||
CFLAGS_PIC:= $(call check_gcc,-fPIC,)
|
||||
CFLAGS_PIC:= $(call check_cc,$(CC),-fPIC,)
|
||||
LIB_CFLAGS+=$(CFLAGS_PIC)
|
||||
endif
|
||||
|
||||
|
||||
ifeq ($(strip $(CONFIG_SELINUX)),y)
|
||||
LIBRARIES += -lselinux
|
||||
endif
|
||||
@ -253,6 +308,10 @@ ifeq ($(strip $(PREFIX)),)
|
||||
PREFIX:=`pwd`/_install
|
||||
endif
|
||||
|
||||
#ifneq ($(strip $(CONFIG_GETOPT_LONG)),y)
|
||||
# CFLAGS += -D__need_getopt
|
||||
#endif
|
||||
|
||||
# Additional complications due to support for pristine source dir.
|
||||
# Include files in the build directory should take precedence over
|
||||
# the copy in top_srcdir, both during the compilation phase and the
|
||||
@ -262,6 +321,8 @@ endif
|
||||
|
||||
OBJECTS:=$(APPLET_SOURCES:.c=.o) busybox.o usage.o applets.o
|
||||
CFLAGS += $(CHECKED_CFLAGS) $(CROSS_CFLAGS)
|
||||
LDFLAGS += $(CHECKED_LDFLAGS)
|
||||
|
||||
ifdef BB_INIT_SCRIPT
|
||||
CFLAGS += -DINIT_SCRIPT='"$(BB_INIT_SCRIPT)"'
|
||||
endif
|
||||
|
||||
Loading…
Reference in New Issue
Block a user