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-rw-r--r--Makefile145
1 files changed, 111 insertions, 34 deletions
diff --git a/Makefile b/Makefile
index 29897ef4e..3e2b3ef18 100644
--- a/Makefile
+++ b/Makefile
@@ -22,37 +22,112 @@
#--------------------------------------------------------------
noconfig_targets := menuconfig config oldconfig randconfig \
defconfig allyesconfig allnoconfig clean distclean \
- release tags
-TOPDIR=./
-include Rules.mak
+ release tags
+
+ifndef TOPDIR
+TOPDIR=$(CURDIR)/
+endif
+ifndef top_srcdir
+top_srcdir=$(CURDIR)
+endif
+ifndef top_builddir
+top_builddir=$(CURDIR)
+endif
+
+srctree=$(top_srcdir)
+vpath %/Config.in $(srctree)
+
+include $(top_builddir)/Rules.mak
DIRS:=applets archival archival/libunarchive coreutils console-tools \
debianutils editors findutils init miscutils modutils networking \
networking/libiproute networking/udhcp procps loginutils shell \
sysklogd util-linux libpwdgrp coreutils/libcoreutils libbb
+SRC_DIRS:=$(patsubst %,$(top_srcdir)/%,$(DIRS))
+
ifeq ($(strip $(CONFIG_SELINUX)),y)
CFLAGS += -I/usr/include/selinux
LIBRARIES += -lsecure
endif
-CONFIG_CONFIG_IN = sysdeps/$(TARGET_OS)/Config.in
-CONFIG_DEFCONFIG = sysdeps/$(TARGET_OS)/defconfig
+CONFIG_CONFIG_IN = $(top_srcdir)/sysdeps/$(TARGET_OS)/Config.in
+CONFIG_DEFCONFIG = $(top_srcdir)/sysdeps/$(TARGET_OS)/defconfig
+
+ALL_DIRS:= $(DIRS) scripts/config
+ALL_MAKEFILES:=$(patsubst %,%/Makefile,$(ALL_DIRS))
+
+ifeq ($(KBUILD_SRC),)
+
+ifdef O
+ ifeq ("$(origin O)", "command line")
+ KBUILD_OUTPUT := $(O)
+ endif
+endif
+
+# That's our default target when none is given on the command line
+.PHONY: _all
+_all:
+
+ifneq ($(KBUILD_OUTPUT),)
+# Invoke a second make in the output directory, passing relevant variables
+# check that the output directory actually exists
+saved-output := $(KBUILD_OUTPUT)
+KBUILD_OUTPUT := $(shell cd $(KBUILD_OUTPUT) && /bin/pwd)
+$(if $(wildcard $(KBUILD_OUTPUT)),, \
+ $(error output directory "$(saved-output)" does not exist))
+
+.PHONY: $(MAKECMDGOALS)
+
+$(filter-out _all,$(MAKECMDGOALS)) _all: $(KBUILD_OUTPUT)/Rules.mak $(KBUILD_OUTPUT)/Makefile
+ $(MAKE) -C $(KBUILD_OUTPUT) \
+ top_srcdir=$(CURDIR) \
+ top_builddir=$(KBUILD_OUTPUT) \
+ TOPDIR=$(KBUILD_OUTPUT) \
+ KBUILD_SRC=$(CURDIR) \
+ -f $(CURDIR)/Makefile $@
+
+$(KBUILD_OUTPUT)/Rules.mak:
+ @echo > $@
+ @echo top_srcdir=$(CURDIR) >> $@
+ @echo top_builddir=$(KBUILD_OUTPUT) >> $@
+ @echo include $(top_srcdir)/Rules.mak >> $@
+
+$(KBUILD_OUTPUT)/Makefile:
+ @echo > $@
+ @echo top_srcdir=$(CURDIR) >> $@
+ @echo top_builddir=$(KBUILD_OUTPUT) >> $@
+ @echo KBUILD_SRC='$$(top_srcdir)' >> $@
+ @echo include '$$(KBUILD_SRC)'/Makefile >> $@
+
+# Leave processing to above invocation of make
+skip-makefile := 1
+endif # ifneq ($(KBUILD_OUTPUT),)
+endif # ifeq ($(KBUILD_SRC),)
+
+ifeq ($(skip-makefile),)
+
+_all: all
ifeq ($(strip $(HAVE_DOT_CONFIG)),y)
all: busybox busybox.links doc
+all_tree: $(ALL_MAKEFILES)
+
+$(ALL_MAKEFILES): %/Makefile: $(top_srcdir)/%/Makefile
+ d=`dirname $@`; [ -d "$$d" ] || mkdir -p "$$d"; cp $< $@
+
# In this section, we need .config
--include .config.cmd
-include $(patsubst %,%/Makefile.in, $(DIRS))
--include $(TOPDIR).depend
+-include $(top_builddir)/.config.cmd
+include $(patsubst %,%/Makefile.in, $(SRC_DIRS))
+-include $(top_builddir)/.depend
-busybox: .depend include/config.h $(libraries-y)
+busybox: $(ALL_MAKEFILES) .depend include/config.h $(libraries-y)
$(CC) $(LDFLAGS) -o $@ -Wl,--start-group $(libraries-y) $(LIBRARIES) -Wl,--end-group
$(STRIPCMD) $@
-busybox.links: applets/busybox.mkll include/config.h
+busybox.links: $(top_srcdir)/applets/busybox.mkll include/config.h $(top_srcdir)/include/applets.h
- $(SHELL) $^ >$@
install: applets/install.sh busybox busybox.links
@@ -75,14 +150,18 @@ uninstall: busybox.links
install-hardlinks: applets/install.sh busybox busybox.links
$(SHELL) $< $(PREFIX) --hardlinks
+check: busybox
+ bindir=$(top_builddir) srcdir=$(top_srcdir)/testsuite \
+ $(top_srcdir)/testsuite/runtest
# Documentation Targets
doc: docs/busybox.pod docs/BusyBox.txt docs/BusyBox.1 docs/BusyBox.html
-docs/busybox.pod : docs/busybox_header.pod include/usage.h docs/busybox_footer.pod
- - ( cat docs/busybox_header.pod; \
- docs/autodocifier.pl include/usage.h; \
- cat docs/busybox_footer.pod ) > docs/busybox.pod
+docs/busybox.pod : $(top_srcdir)/docs/busybox_header.pod $(top_srcdir)/include/usage.h $(top_srcdir)/docs/busybox_footer.pod
+ -mkdir -p docs
+ - ( cat $(top_srcdir)/docs/busybox_header.pod; \
+ $(top_srcdir)/docs/autodocifier.pl $(top_srcdir)/include/usage.h; \
+ cat $(top_srcdir)/docs/busybox_footer.pod ) > docs/busybox.pod
docs/BusyBox.txt: docs/busybox.pod
@echo
@@ -99,7 +178,7 @@ docs/BusyBox.1: docs/busybox.pod
docs/BusyBox.html: docs/busybox.net/BusyBox.html
- mkdir -p docs
-@ rm -f docs/BusyBox.html
- -@ ln -s busybox.net/BusyBox.html docs/BusyBox.html
+ -@ cp docs/busybox.net/BusyBox.html docs/BusyBox.html
docs/busybox.net/BusyBox.html: docs/busybox.pod
-@ mkdir -p docs/busybox.net
@@ -108,20 +187,19 @@ docs/busybox.net/BusyBox.html: docs/busybox.pod
-@ rm -f pod2htm*
# The nifty new buildsystem stuff
-scripts/mkdep: scripts/mkdep.c
- $(HOSTCC) $(HOSTCFLAGS) -o scripts/mkdep scripts/mkdep.c
+scripts/mkdep: $(top_srcdir)/scripts/mkdep.c
+ $(HOSTCC) $(HOSTCFLAGS) -o $@ $<
-scripts/split-include: scripts/split-include.c
- $(HOSTCC) $(HOSTCFLAGS) -o scripts/split-include scripts/split-include.c
+scripts/split-include: $(top_srcdir)/scripts/split-include.c
+ $(HOSTCC) $(HOSTCFLAGS) -o $@ $<
.depend: scripts/mkdep
rm -f .depend .hdepend;
mkdir -p include/config;
- $(HOSTCC) $(HOSTCFLAGS) -o scripts/mkdep scripts/mkdep.c
scripts/mkdep -I include -- \
- `find -name \*.c -print | sed -e "s,^./,,"` >> .depend;
+ `find $(top_srcdir) -name \*.c -print | sed -e "s,^./,,"` >> .depend;
scripts/mkdep -I include -- \
- `find -name \*.h -print | sed -e "s,^./,,"` >> .hdepend;
+ `find $(top_srcdir) -name \*.h -print | sed -e "s,^./,,"` >> .hdepend;
depend dep: include/config.h .depend
@@ -130,13 +208,10 @@ include/config/MARKER: depend scripts/split-include
@ touch include/config/MARKER
include/config.h: .config
- @if [ ! -x ./scripts/config/conf ] ; then \
+ @if [ ! -x $(top_builddir)/scripts/config/conf ] ; then \
$(MAKE) -C scripts/config conf; \
fi;
- @./scripts/config/conf -o $(CONFIG_CONFIG_IN)
-
-%.o: %.c
- $(CC) $(CFLAGS) $(EXTRA_CFLAGS) -c -o $@ $<
+ @$(top_builddir)/scripts/config/conf -o $(CONFIG_CONFIG_IN)
finished2:
@echo
@@ -150,12 +225,16 @@ all: menuconfig
# configuration
# ---------------------------------------------------------------------------
-scripts/config/conf:
+$(ALL_MAKEFILES): %/Makefile: $(top_srcdir)/%/Makefile
+ d=`dirname $@`; [ -d "$$d" ] || mkdir -p "$$d"; cp $< $@
+
+scripts/config/conf: scripts/config/Makefile Rules.mak
$(MAKE) -C scripts/config conf
-@if [ ! -f .config ] ; then \
cp $(CONFIG_DEFCONFIG) .config; \
fi
-scripts/config/mconf:
+
+scripts/config/mconf: scripts/config/Makefile Rules.mak
$(MAKE) -C scripts/config ncurses conf mconf
-@if [ ! -f .config ] ; then \
cp $(CONFIG_DEFCONFIG) .config; \
@@ -187,9 +266,6 @@ allnoconfig: scripts/config/conf
defconfig: scripts/config/conf
@./scripts/config/conf -d $(CONFIG_CONFIG_IN)
-check: busybox
- cd testsuite && ./runtest
-
clean:
- rm -f docs/busybox.dvi docs/busybox.ps \
docs/busybox.pod docs/busybox.net/busybox.html \
@@ -232,7 +308,8 @@ tags:
endif # ifeq ($(strip $(HAVE_DOT_CONFIG)),y)
-.PHONY: dummy subdirs release distclean clean config oldconfig \
- menuconfig tags check test depend
+endif # ifeq ($(skip-makefile),)
+.PHONY: dummy subdirs release distclean clean config oldconfig \
+ menuconfig tags check test depend buildtree