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-rw-r--r--Rules.mak312
1 files changed, 109 insertions, 203 deletions
diff --git a/Rules.mak b/Rules.mak
index 031b41e..34c9be6 100644
--- a/Rules.mak
+++ b/Rules.mak
@@ -10,10 +10,6 @@ ifeq ($(filter $(noconfig_targets),$(MAKECMDGOALS)),)
-include $(top_builddir)/.config
endif
-ifeq ($(HAVE_DOT_CONFIG),y)
-rules-mak-rules:=0
-endif
-
#--------------------------------------------------------
PROG := busybox
MAJOR_VERSION :=1
@@ -34,9 +30,8 @@ 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
@@ -45,18 +40,7 @@ NM = $(CROSS)nm
STRIP = $(CROSS)strip
CPP = $(CC) -E
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.
@@ -69,21 +53,10 @@ HOSTCFLAGS= -Wall -Wstrict-prototypes -O2 -fomit-frame-pointer
# Ensure consistent sort order, 'gcc -print-search-dirs' behavior, etc.
LC_ALL:= C
-# initialize flags here
-CFLAGS:=
-CFLAGS_COMBINE:=
-CFLAGS_PIC:=
-LD_FLAGS:=
-LIB_LDFLAGS:=
-PROG_LDFLAGS:=
-PROG_CFLAGS:=
-OPTIMIZATIONS:=
-
# 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 OPTIMIZATIONS.
+# For optimization overrides, it's better still to set OPTIMIZATION.
CFLAGS_EXTRA=$(subst ",, $(strip $(EXTRA_CFLAGS_OPTIONS)))
-#")
# To compile vs some other alternative libc, you may need to use/adjust
# the following lines to meet your needs...
@@ -100,50 +73,20 @@ CFLAGS_EXTRA=$(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
+CFLAGS+=-I$(top_builddir)/include -I$(top_srcdir)/include -I$(srcdir)
ARFLAGS=cru
-
-# Get the CC MAJOR/MINOR version
# gcc centric. Perhaps fiddle with findstring gcc,$(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
-
-# 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 $(CC) -dumpmachine | sed -e s'/-.*//' \
+ifeq ($(strip $(TARGET_ARCH)),)
+TARGET_ARCH:=$(shell $(CC) -dumpmachine | sed -e s'/-.*//' \
-e 's/i.86/i386/' \
-e 's/sparc.*/sparc/' \
-e 's/arm.*/arm/g' \
@@ -157,60 +100,70 @@ __TARGET_ARCH:=$(shell $(CC) -dumpmachine | sed -e s'/-.*//' \
)
endif
-CFLAGS+=$(call check_gcc,CFLAGS,-funsigned-char,)
-CFLAGS+=$(call check_gcc,CFLAGS,-mmax-stack-frame=256,)
+# A nifty macro to make testing gcc features easier
+check_gcc=$(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,)
#--------------------------------------------------------
# Arch specific compiler optimization stuff should go here.
# Unless you want to override the defaults, do not set anything
-# for OPTIMIZATIONS...
+# for OPTIMIZATION...
# use '-Os' optimization if available, else use -O2
-OPTIMIZATIONS+=$(call check_gcc,OPTIMIZATIONS,-Os,-O2)
+OPTIMIZATION:=$(call check_gcc,-Os,-O2)
+ifeq ($(CONFIG_BUILD_AT_ONCE),y)
# gcc 2.95 exits with 0 for "unrecognized option"
-CFLAGS_COMBINE+=$(if $(call is_eq,$(CONFIG_BUILD_AT_ONCE),y),\
- $(if $(call cc_ge,3,0),\
- $(call check_gcc,CFLAGS_COMBINE,--combine,)))
-
-OPTIMIZATIONS+=$(if $(call is_eq,$(CONFIG_BUILD_AT_ONCE),y),\
- $(call check_gcc,OPTIMIZATIONS,-funit-at-a-time,))
-
-# http://gcc.gnu.org/bugzilla/show_bug.cgi?id=25795
-#PROG_CFLAGS+=$(if $(call is_eq,$(CONFIG_BUILD_AT_ONCE),y),\
-# $(call check_gcc,PROG_CFLAGS,-fwhole-program,))
+ifeq ($(strip $(shell [ $(CC_MAJOR) -ge 3 ] ; echo $$?)),0)
+ CFLAGS_COMBINE:=$(call check_gcc,--combine,)
+endif
+OPTIMIZATION+=$(call check_gcc,-funit-at-a-time,)
+PROG_CFLAGS+=$(call check_gcc,-fwhole-program,)
+endif # CONFIG_BUILD_AT_ONCE
-LIB_LDFLAGS+=$(call check_ld,LIB_LDFLAGS,--enable-new-dtags,)
-#LIB_LDFLAGS+=$(call check_ld,LIB_LDFLAGS,--reduce-memory-overheads,)
-#LIB_LDFLAGS+=$(call check_ld,LIB_LDFLAGS,--as-needed,)
-#LIB_LDFLAGS+=$(call check_ld,LIB_LDFLAGS,--warn-shared-textrel,)
+LIB_LDFLAGS:=$(call check_ld,--enable-new-dtags,)
+#LIB_LDFLAGS+=$(call check_ld,--reduce-memory-overheads,)
+#LIB_LDFLAGS+=$(call check_ld,--as-needed,)
+#LIB_LDFLAGS+=$(call check_ld,--warn-shared-textrel,)
-PROG_LDFLAGS+=$(call check_ld,PROG_LDFLAGS,--gc-sections,)
# Some nice architecture specific optimizations
-ifeq ($(__TARGET_ARCH),arm)
- OPTIMIZATIONS+=-fstrict-aliasing
-endif # arm
-
-OPTIMIZATIONS+=$(if $(call is_eq,$(__TARGET_ARCH),i386),\
- $(call check_gcc,OPTIMIZATIONS,-march=i386,))
-
+ifeq ($(strip $(TARGET_ARCH)),arm)
+ OPTIMIZATION+=-fstrict-aliasing
+endif
+ifeq ($(strip $(TARGET_ARCH)),i386)
+ OPTIMIZATION+=$(call check_gcc,-march=i386,)
# gcc-4.0 and older seem to benefit from these
-OPTIMIZATIONS+=$(if $(call cc_le,4,0),\
- $(call check_gcc,OPTIMIZATIONS,-mpreferred-stack-boundary=2,)\
- $(call check_gcc,OPTIMIZATIONS,-falign-functions=1 -falign-jumps=1 -falign-loops=1,\
- -malign-functions=0 -malign-jumps=0 -malign-loops=0))
+#ifneq ($(strip $(shell [ $(CC_MAJOR) -ge 4 -a $(CC_MINOR) -ge 1 ] ; echo $$?)),0)
+ OPTIMIZATION+=$(call check_gcc,-mpreferred-stack-boundary=2,)
+ OPTIMIZATION+=$(call check_gcc,-falign-functions=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
-# turn off flags which hurt -Os
-OPTIMIZATIONS+=$(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,)\
-\
- $(call check_gcc,OPTIMIZATIONS,-fno-branch-count-reg,))
-
-OPTIMIZATIONS+=$(call check_gcc,OPTIMIZATIONS,-fomit-frame-pointer,)
+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,)
#
#--------------------------------------------------------
@@ -221,42 +174,45 @@ OPTIMIZATIONS+=$(call check_gcc,OPTIMIZATIONS,-fomit-frame-pointer,)
# prone to casual user adjustment.
#
-ifeq ($(CONFIG_LFS),y)
+ifeq ($(strip $(CONFIG_LFS)),y)
# For large file summit support
CFLAGS+=-D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE -D_FILE_OFFSET_BITS=64
endif
-ifeq ($(CONFIG_DMALLOC),y)
+ifeq ($(strip $(CONFIG_DMALLOC)),y)
# For testing mem leaks with dmalloc
CFLAGS+=-DDMALLOC
LIBRARIES:=-ldmalloc
else
- ifeq ($(CONFIG_EFENCE),y)
+ ifeq ($(strip $(CONFIG_EFENCE)),y)
LIBRARIES:=-lefence
endif
endif
-
-LDFLAGS+=$(if $(call is_eq,$(CONFIG_DEBUG),y),$(call check_ld,LDFLAGS,--warn-common,)$(call check_ld,LDFLAGS,--sort-common,))
-ifeq ($(CONFIG_DEBUG),y)
+ifeq ($(strip $(CONFIG_DEBUG)),y)
CFLAGS +=$(WARNINGS) -g -D_GNU_SOURCE
+ LDFLAGS += $(call check_ld,--warn-common,)
else
CFLAGS+=$(WARNINGS) $(OPTIMIZATIONS) -D_GNU_SOURCE -DNDEBUG
+ LDFLAGS += $(call check_ld,--warn-common,)
+ LDFLAGS += $(call check_ld,--sort-common,)
endif
ifeq ($(CONFIG_STRIP_BINARIES),y)
STRIPCMD:=$(STRIP) -s --remove-section=.note --remove-section=.comment
else
STRIPCMD:=/bin/true -Not_stripping_since_we_are_debugging
endif
-PROG_CFLAGS+=$(if $(call is_eq,$(CONFIG_STATIC),y),\
- $(call check_gcc,PROG_CFLAGS,-static,))
-
-CFLAGS_SHARED+=$(call check_gcc,CFLAGS_SHARED,-shared,)
+ifeq ($(strip $(CONFIG_STATIC)),y)
+ PROG_CFLAGS += $(call check_gcc,-static,)
+endif
+CFLAGS_SHARED += $(call check_gcc,-shared,)
LIB_CFLAGS+=$(CFLAGS_SHARED)
-CFLAGS_PIC+=$(if $(call is_eq,$(CONFIG_BUILD_LIBBUSYBOX),y),\
- $(call check_gcc,CFLAGS_PIC,-fPIC,))
-LIB_CFLAGS+=$(CFLAGS_PIC)
+ifeq ($(strip $(CONFIG_BUILD_LIBBUSYBOX)),y)
+ CFLAGS_PIC:= $(call check_gcc,-fPIC,)
+ LIB_CFLAGS+=$(CFLAGS_PIC)
+endif
+
-ifeq ($(CONFIG_SELINUX),y)
+ifeq ($(strip $(CONFIG_SELINUX)),y)
LIBRARIES += -lselinux
endif
@@ -264,6 +220,14 @@ 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)"'
@@ -285,117 +249,59 @@ 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
-
-# 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
+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
-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 =
+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_link.h = $($(DISP)_disp_link.h)
disp_ar = $($(DISP)_disp_ar)
-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 $@))
+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) $(EXTRA_CFLAGS) -I$(srcdir) $(LDFLAGS)
-cmd_link.h = $(HOSTCC) $(HOSTCFLAGS) $(HOST_LDFLAGS) $^ -o $@
+cmd_link = $(CC) $(CFLAGS) $(EXTRA_CFLAGS) $(LDFLAGS)
cmd_ar = $(AR) $(ARFLAGS) $@ $^
-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: ; $(compile.c)
-%.os: ; $(compile.c) $(CFLAGS_PIC)
-%.om: ; $(compile.m)
-%.osm: ; $(compile.m) $(CFLAGS_PIC)
-%.a: ; $(do_ar)
-
-endif # rules-mak-rules
+compile.c = @$(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
-
generated by cgit v1.1 at 2024-12-26 19:28:33 +0000