diff options
Diffstat (limited to 'Rules.mak')
| -rw-r--r-- | Rules.mak | 314 |
1 files changed, 198 insertions, 116 deletions
@@ -10,6 +10,12 @@ ifeq ($(filter $(noconfig_targets),$(MAKECMDGOALS)),) -include $(top_builddir)/.config endif +ifeq ($(MAKELEVEL),0) +ifeq ($(HAVE_DOT_CONFIG),y) +rules-mak-rules:=0 +endif +endif + #-------------------------------------------------------- PROG := busybox MAJOR_VERSION :=1 @@ -30,8 +36,9 @@ BUILDTIME := $(shell TZ=UTC date -u "+%Y.%m.%d-%H:%M%z") # If you are running a cross compiler, you will want to set 'CROSS' # to something more interesting... Target architecture is determined # by asking the CC compiler what arch it compiles things for, so unless -# your compiler is broken, you should not need to specify TARGET_ARCH +# your compiler is broken, you should not need to specify __TARGET_ARCH CROSS =$(subst ",, $(strip $(CROSS_COMPILER_PREFIX))) +#") CC = $(CROSS)gcc AR = $(CROSS)ar AS = $(CROSS)as @@ -39,16 +46,19 @@ LD = $(CROSS)ld NM = $(CROSS)nm 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 +SED ?= sed +AWK ?= awk + + +ifdef PACKAGE_BE_VERBOSE +PACKAGE_BE_VERBOSE := $(shell echo $(PACKAGE_BE_VERBOSE) | $(SED) "s/[[:alpha:]]*//g") +endif +# for make V=3 and above make $(shell) invocations verbose +ifeq ($(if $(strip $(PACKAGE_BE_VERBOSE)),$(shell test $(PACKAGE_BE_VERBOSE) -gt 2 ; echo $$?),1),0) + SHELL+=-x + MKDEP_ARGS:=-w +endif # What OS are you compiling busybox for? This allows you to include # OS specific things, syscall overrides, etc. @@ -63,8 +73,9 @@ 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. +# For optimization overrides, it's better still to set OPTIMIZATIONS. CFLAGS_EXTRA=$(subst ",, $(strip $(EXTRA_CFLAGS_OPTIONS))) +#") # To compile vs some other alternative libc, you may need to use/adjust # the following lines to meet your needs... @@ -81,20 +92,50 @@ CFLAGS_EXTRA=$(subst ",, $(strip $(EXTRA_CFLAGS_OPTIONS))) #GCCINCDIR:=$(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$(top_srcdir)/include ARFLAGS=cru + +# Get the CC MAJOR/MINOR version # gcc centric. Perhaps fiddle with findstring gcc,$(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__ | $(CC) -E -xc - | tail -n 1)) +# Note: spaces are significant here! +# Check if CC version is equal to given MAJOR,MINOR. Returns empty if false. +define cc_eq +$(shell [ $(CC_MAJOR) -eq $(1) -a $(CC_MINOR) -eq $(2) ] && echo y) +endef +# Check if CC version is greater or equal than given MAJOR,MINOR +define cc_ge +$(shell [ $(CC_MAJOR) -ge $(1) -a $(CC_MINOR) -ge $(2) ] && echo y) +endef +# Check if CC version is less or equal than given MAJOR,MINOR +define cc_le +$(shell [ $(CC_MAJOR) -le $(1) -a $(CC_MINOR) -le $(2) ] && echo y) +endef + +# Workaround bugs in make-3.80 for eval in conditionals +define is_eq +$(shell [ $(1) = $(2) ] 2> /dev/null && echo y) +endef +define is_neq +$(shell [ $(1) != $(2) ] 2> /dev/null && echo y) +endef + #-------------------------------------------------------- export VERSION BUILDTIME HOSTCC HOSTCFLAGS CROSS CC AR AS LD NM STRIP CPP -ifeq ($(strip $(TARGET_ARCH)),) -TARGET_ARCH:=$(shell $(CC) -dumpmachine | sed -e s'/-.*//' \ + +# TARGET_ARCH and TARGET_MACH will be passed verbatim to CC with recent +# versions of make, so we use __TARGET_ARCH here. +# Current builtin rules looks like that: +# COMPILE.s = $(AS) $(ASFLAGS) $(TARGET_MACH) +# COMPILE.c = $(CC) $(CFLAGS) $(CPPFLAGS) $(TARGET_ARCH) -c + +ifeq ($(strip $(__TARGET_ARCH)),) +__TARGET_ARCH:=$(shell $(CC) -dumpmachine | sed -e s'/-.*//' \ -e 's/i.86/i386/' \ -e 's/sparc.*/sparc/' \ -e 's/arm.*/arm/g' \ @@ -108,70 +149,60 @@ TARGET_ARCH:=$(shell $(CC) -dumpmachine | sed -e s'/-.*//' \ ) endif -# A nifty macro to make testing gcc features easier -check_gcc=$(shell \ - if [ "$(1)" != "" ]; then \ - if $(CC) $(1) -S -o /dev/null -xc /dev/null > /dev/null 2>&1; \ - then echo "$(1)"; else echo "$(2)"; fi \ - fi) - -# A not very robust macro to check for available ld flags -check_ld=$(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,) +$(call check_gcc,CFLAGS,-funsigned-char,) +$(call check_gcc,CFLAGS,-mmax-stack-frame=256,) #-------------------------------------------------------- # Arch specific compiler optimization stuff should go here. # Unless you want to override the defaults, do not set anything -# for OPTIMIZATION... +# for OPTIMIZATIONS... # use '-Os' optimization if available, else use -O2 -OPTIMIZATION:=$(call check_gcc,-Os,-O2) +$(call check_gcc,OPTIMIZATIONS,-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 $$?)),0) - OPTIMIZATION+=$(call check_gcc,--combine,) -endif -OPTIMIZATION+=$(call check_gcc,-funit-at-a-time,) -PROG_CFLAGS+=$(call check_gcc,-fwhole-program,) -endif # CONFIG_BUILD_AT_ONCE +$(if $(call is_eq,$(CONFIG_BUILD_AT_ONCE),y),\ + $(if $(call cc_ge,3,0),\ + $(call check_gcc,CFLAGS_COMBINE,--combine,))) -LIB_LDFLAGS:=$(call check_ld,--enable-new-dtags,) -#LIB_LDFLAGS+=$(call check_ld,--reduce-memory-overheads,) -#LIB_LDFLAGS+=$(call check_ld,--as-needed,) -#LIB_LDFLAGS+=$(call check_ld,--warn-shared-textrel,) +$(if $(call is_eq,$(CONFIG_BUILD_AT_ONCE),y),\ + $(call check_gcc,OPTIMIZATIONS,-funit-at-a-time,)) +# http://gcc.gnu.org/bugzilla/show_bug.cgi?id=25795 +#$(if $(call is_eq,$(CONFIG_BUILD_AT_ONCE),y),\ +# $(call check_gcc,PROG_CFLAGS,-fwhole-program,)) + +$(call check_ld,LIB_LDFLAGS,--enable-new-dtags,) +#$(call check_ld,LIB_LDFLAGS,--reduce-memory-overheads,) +#$(call check_ld,LIB_LDFLAGS,--as-needed,) +#$(call check_ld,LIB_LDFLAGS,--warn-shared-textrel,) + +$(call check_ld,PROG_LDFLAGS,--gc-sections,) # Some nice architecture specific optimizations -ifeq ($(strip $(TARGET_ARCH)),arm) - OPTIMIZATION+=-fstrict-aliasing -endif -ifeq ($(strip $(TARGET_ARCH)),i386) - OPTIMIZATION+=$(call check_gcc,-march=i386,) +ifeq ($(__TARGET_ARCH),arm) + OPTIMIZATIONS+=-fstrict-aliasing +endif # arm + +$(if $(call is_eq,$(__TARGET_ARCH),i386),\ + $(call check_gcc,OPTIMIZATIONS,-march=i386,)) + # gcc-4.0 and older seem to suffer from these -ifneq ($(strip $(shell [ $(CC_MAJOR) -ge 4 -a $(CC_MINOR) -ge 1 ] ; echo $$?)),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 +$(if $(call cc_le,4,0),\ + $(call check_gcc,OPTIMIZATIONS,-mpreferred-stack-boundary=2,)\ + $(call check_gcc,OPTIMIZATIONS,-falign-functions=0 -falign-jumps=0 -falign-loops=0,\ + -malign-functions=0 -malign-jumps=0 -malign-loops=0)) # gcc-4.1 and beyond seem to benefit from these -ifeq ($(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) $(call check_gcc,-fomit-frame-pointer,) +# turn off flags which hurt -Os +$(if $(call cc_ge,4,1),\ + $(call check_gcc,OPTIMIZATIONS,-fno-tree-loop-optimize,)\ + $(call check_gcc,OPTIMIZATIONS,-fno-tree-dominator-opts,)\ + $(call check_gcc,OPTIMIZATIONS,-fno-strength-reduce,)\ +\ + $(call check_gcc,OPTIMIZATIONS,-fno-branch-count-reg,)) + +$(call check_gcc,OPTIMIZATIONS,-fomit-frame-pointer,) # #-------------------------------------------------------- @@ -182,40 +213,40 @@ OPTIMIZATIONS:=$(OPTIMIZATION) $(call check_gcc,-fomit-frame-pointer,) # prone to casual user adjustment. # -ifeq ($(strip $(CONFIG_LFS)),y) +ifeq ($(CONFIG_LFS),y) # For large file summit support CFLAGS+=-D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE -D_FILE_OFFSET_BITS=64 endif -ifeq ($(strip $(CONFIG_DMALLOC)),y) +ifeq ($(CONFIG_DMALLOC),y) # For testing mem leaks with dmalloc CFLAGS+=-DDMALLOC LIBRARIES:=-ldmalloc else - ifeq ($(strip $(CONFIG_EFENCE)),y) + ifeq ($(CONFIG_EFENCE),y) LIBRARIES:=-lefence endif endif -ifeq ($(strip $(CONFIG_DEBUG)),y) + +$(if $(call is_eq,$(CONFIG_DEBUG),y),\ + $(call check_ld,LDFLAGS,--warn-common,),\ + $(call check_ld,LDFLAGS,--warn-common,)$(call check_ld,LDFLAGS,--sort-common,)) +ifeq ($(CONFIG_DEBUG),y) CFLAGS +=$(WARNINGS) -g -D_GNU_SOURCE - LDFLAGS += $(call check_ld,--warn-common,) STRIPCMD:=/bin/true -Not_stripping_since_we_are_debugging else CFLAGS+=$(WARNINGS) $(OPTIMIZATIONS) -D_GNU_SOURCE -DNDEBUG - 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) - PROG_CFLAGS += $(call check_gcc,-static,) -endif -CFLAGS_SHARED += $(call check_gcc,-shared,) +$(if $(call is_eq,$(CONFIG_STATIC),y),\ + $(call check_gcc,PROG_CFLAGS,-static,)) + +$(call check_gcc,CFLAGS_SHARED,-shared,) LIB_CFLAGS+=$(CFLAGS_SHARED) -ifeq ($(strip $(CONFIG_BUILD_LIBBUSYBOX)),y) - CFLAGS_PIC:= $(call check_gcc,-fPIC,) -endif +$(if $(call is_eq,$(CONFIG_BUILD_LIBBUSYBOX),y),\ + $(call check_gcc,CFLAGS_PIC,-fPIC,)) -ifeq ($(strip $(CONFIG_SELINUX)),y) +ifeq ($(CONFIG_SELINUX),y) LIBRARIES += -lselinux endif @@ -223,14 +254,6 @@ ifeq ($(strip $(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 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>. - - -OBJECTS:=$(APPLET_SOURCES:.c=.o) busybox.o usage.o applets.o CFLAGS += $(CROSS_CFLAGS) ifdef BB_INIT_SCRIPT CFLAGS += -DINIT_SCRIPT='"$(BB_INIT_SCRIPT)"' @@ -252,59 +275,118 @@ ifeq ($(strip $(CONFIG_INSTALL_APPLET_DONT)),y) INSTALL_OPTS= endif + +#------------------------------------------------------------ +# object extensions + +# object potentially used in shared object +ifeq ($(strip $(CONFIG_BUILD_LIBBUSYBOX)),y) +# single-object extension +os:=.os +# multi-object extension +om:=.osm +else +os:=.o +om:=.om +endif + #------------------------------------------------------------ # Make the output nice and tight -MAKEFLAGS += --no-print-directory + +# for make V=2 and above, do print directory +ifneq ($(shell test -n "$(strip $(PACKAGE_BE_VERBOSE))" && test $(PACKAGE_BE_VERBOSE) -gt 1 ; echo $$?),0) + MAKEFLAGS += --no-print-directory +endif + +export MAKEOVERRIDES 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 -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) +define show_objs + $(subst $(top_builddir)/,,$(subst ../,,$@)) +endef +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_link.h = @echo " "HOSTLINK $(show_objs) ; +pur_disp_ar = @echo " "AR $(ARFLAGS) $(show_objs) ; +pur_disp_gen = @echo " "GEN $@ ; +pur_disp_doc = @echo " "DOC $(subst docs/,,$@) ; +pur_disp_bin = @echo " "BIN $(show_objs) ; +sil_disp_compile.c = @ +sil_disp_compile.h = @ +sil_disp_strip = @ +sil_disp_link = @ +sil_disp_link.h = @ +sil_disp_ar = @ +sil_disp_gen = @ +sil_disp_doc = @ +sil_disp_bin = @ +ver_disp_compile.c = +ver_disp_compile.h = +ver_disp_strip = +ver_disp_link = +ver_disp_link.h = +ver_disp_ar = +ver_disp_gen = +ver_disp_doc = +ver_disp_bin = 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_link.h = $($(DISP)_disp_link.h) 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 $@ $< +disp_gen = $($(DISP)_disp_gen) +disp_doc = $($(DISP)_disp_doc) +disp_bin = $($(DISP)_disp_bin) +# CFLAGS-dir == $(CFLAGS-$(notdir $(@D))) +# CFLAGS-dir-file.o == $(CFLAGS-$(notdir $(@D))-$(notdir $(@F))) +# CFLAGS-dir-file.c == $(CFLAGS-$(notdir $(<D))-$(notdir $(<F))) +# all prerequesites == $(foreach fil,$^,$(CFLAGS-$(notdir $(patsubst %/$,%,$(dir $(fil))))-$(notdir $(fil)))) +cmd_compile.c = $(CC) $(CFLAGS) $(EXTRA_CFLAGS) -I$(srcdir) -c -o $@ $< \ + $(foreach f,$^,$(CFLAGS-$(notdir $(patsubst %/$,%,$(dir $(f))))-$(notdir $(f)))) \ + $(CFLAGS-$(notdir $(@D))-$(notdir $(@F))) \ + $(CFLAGS-$(notdir $(@D))) +cmd_compile.m = $(cmd_compile.c) -DL_$(patsubst %$(suffix $(notdir $@)),%,$(notdir $@)) cmd_compile.h = $(HOSTCC) $(HOSTCFLAGS) -c -o $@ $< cmd_strip = $(STRIPCMD) $@ -cmd_link = $(CC) $(CFLAGS) $(EXTRA_CFLAGS) $(LDFLAGS) +cmd_link = $(CC) $(CFLAGS) $(EXTRA_CFLAGS) -I$(srcdir) $(LDFLAGS) +cmd_link.h = $(HOSTCC) $(HOSTCFLAGS) $(HOST_LDFLAGS) $^ -o $@ 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) +compile.c = $(disp_compile.c) $(cmd_compile.c) +compile.m = $(disp_compile.c) $(cmd_compile.m) +compile.h = $(disp_compile.h) $(cmd_compile.h) +do_strip = $(disp_strip) $(cmd_strip) +do_link = $(disp_link) $(cmd_link) +do_link.h = $(disp_link.h) $(cmd_link.h) +do_ar = $(disp_ar) $(cmd_ar) + +ifdef rules-mak-rules +.SUFFIXES: .c .S .o .os .om .osm .oS .so .a .s .i .E + +# generic rules +%.o: %.c ; $(compile.c) +%.os: %.c ; $(compile.c) $(CFLAGS_PIC) +%.o: ; $(compile.c) +%.os: ; $(compile.c) $(CFLAGS_PIC) +%.om: ; $(compile.m) +%.osm: ; $(compile.m) $(CFLAGS_PIC) + +endif # rules-mak-rules .PHONY: dummy + |