fixes from ldoolitt@recycle.lbl.gov to use proper tab escaping and fix a typo
[oweals/busybox.git] / Makefile
index c816c9de97be4de2b4a9008afc758e1f777263a0..e5f31d85e147292dc7dd6c8b69d6ebe425d09efc 100644 (file)
--- a/Makefile
+++ b/Makefile
@@ -5,14 +5,20 @@
 # Licensed under GPLv2, see the file LICENSE in this tarball for details.
 #
 
-#--------------------------------------------------------------
-# You shouldn't need to mess with anything beyond this point...
-#--------------------------------------------------------------
-noconfig_targets := menuconfig config oldconfig randconfig \
+# You shouldn't have to edit anything in this file for configuration
+# purposes, try "make help" or read http://busybox.net/FAQ.html.
+
+.PHONY: dummy subdirs release distclean clean config oldconfig menuconfig \
+        tags check test depend dep buildtree hosttools _all checkhelp \
+        sizes bloatcheck baseline objsizes
+
+noconfig_targets := menuconfig config oldconfig randconfig hosttools \
        defconfig allyesconfig allnoconfig allbareconfig \
-       clean distclean \
+       clean distclean help \
        release tags
 
+nocheck_targets := clean distclean help release tags
+
 # the toplevel sourcedir
 ifndef top_srcdir
 top_srcdir=$(CURDIR)
@@ -33,28 +39,44 @@ DIRS:=applets archival archival/libunarchive coreutils console-tools \
 SRC_DIRS:=$(patsubst %,$(top_srcdir)/%,$(DIRS))
 
 # That's our default target when none is given on the command line
-.PHONY: _all
 _all:
 
 CONFIG_CONFIG_IN = $(top_srcdir)/Config.in
-CONFIG_DEFCONFIG = $(top_srcdir)/defconfig
-
-ifeq ($(KBUILD_SRC),)
 
+ifeq ($(BUILD_SRC),)
 ifdef O
   ifeq ("$(origin O)", "command line")
-    KBUILD_OUTPUT := $(O)
+    BUILD_OUTPUT := $(O)
     top_builddir := $(O)
   endif
 else
 # If no alternate output-dir was specified, we build in cwd
-# We are using KBUILD_OUTPUT nevertheless to make sure that we create
+# We are using BUILD_OUTPUT nevertheless to make sure that we create
 # Rules.mak and the toplevel Makefile, in case they don't exist.
-  KBUILD_OUTPUT := $(top_builddir)
+  BUILD_OUTPUT := $(top_builddir)
+endif
+
+# see if we are in verbose mode
+BUILD_VERBOSE :=
+ifdef V
+  ifeq ("$(origin V)", "command line")
+    BUILD_VERBOSE := $(V)
+  endif
+endif
+ifdef VERBOSE
+  ifeq ("$(origin VERBOSE)", "command line")
+    BUILD_VERBOSE := $(VERBOSE)
+  endif
+endif
+
+ifneq ($(strip $(BUILD_VERBOSE)),)
+  export BUILD_VERBOSE
+  CHECK_VERBOSE := -v
+# ARFLAGS+=v
 endif
 
 ifneq ($(strip $(HAVE_DOT_CONFIG)),y)
-# pull in OS specific commands like cp, mkdir, etc. early
+# pull in settings early
 -include $(top_srcdir)/Rules.mak
 endif
 
@@ -65,40 +87,40 @@ all_tree: $(all_tree)
 $(all_tree):
        @mkdir -p "$@"
 
-ifneq ($(KBUILD_OUTPUT),)
+ifneq ($(BUILD_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)),, \
+saved-output := $(BUILD_OUTPUT)
+BUILD_OUTPUT := $(shell cd $(BUILD_OUTPUT) && /bin/pwd)
+$(if $(wildcard $(BUILD_OUTPUT)),, \
      $(error output directory "$(saved-output)" does not exist))
 
 .PHONY: $(MAKECMDGOALS)
 
-$(filter-out _all,$(MAKECMDGOALS)) _all: $(KBUILD_OUTPUT)/Rules.mak $(KBUILD_OUTPUT)/Makefile all_tree
-       $(Q)$(MAKE) -C $(KBUILD_OUTPUT) \
+$(filter-out _all,$(MAKECMDGOALS)) _all: $(BUILD_OUTPUT)/Rules.mak $(BUILD_OUTPUT)/Makefile all_tree
+       $(Q)$(MAKE) -C $(BUILD_OUTPUT) \
        top_srcdir=$(top_srcdir) \
        top_builddir=$(top_builddir) \
-       KBUILD_SRC=$(top_srcdir) \
+       BUILD_SRC=$(top_srcdir) \
        -f $(CURDIR)/Makefile $@
 
-$(KBUILD_OUTPUT)/Rules.mak:
+$(BUILD_OUTPUT)/Rules.mak:
        @echo > $@
        @echo top_srcdir=$(top_srcdir) >> $@
-       @echo top_builddir=$(KBUILD_OUTPUT) >> $@
+       @echo top_builddir=$(BUILD_OUTPUT) >> $@
        @echo include $(top_srcdir)/Rules.mak >> $@
 
-$(KBUILD_OUTPUT)/Makefile:
+$(BUILD_OUTPUT)/Makefile:
        @echo > $@
        @echo top_srcdir=$(top_srcdir) >> $@
-       @echo top_builddir=$(KBUILD_OUTPUT) >> $@
-       @echo KBUILD_SRC='$$(top_srcdir)' >> $@
-       @echo include '$$(KBUILD_SRC)'/Makefile >> $@
+       @echo top_builddir=$(BUILD_OUTPUT) >> $@
+       @echo BUILD_SRC='$$(top_srcdir)' >> $@
+       @echo include '$$(BUILD_SRC)'/Makefile >> $@
 
 # Leave processing to above invocation of make
 skip-makefile := 1
-endif # ifneq ($(KBUILD_OUTPUT),)
-endif # ifeq ($(KBUILD_SRC),)
+endif # ifneq ($(BUILD_OUTPUT),)
+endif # ifeq ($(BUILD_SRC),)
 
 ifeq ($(skip-makefile),)
 
@@ -118,6 +140,7 @@ help:
        @echo '  all                    - Executable and documentation'
        @echo '  busybox                - the swiss-army executable'
        @echo '  doc                    - docs/BusyBox.{txt,html,1}'
+       @echo '  html                   - create html-based cross-reference'
        @echo
        @echo 'Configuration:'
        @echo '  allnoconfig            - disable all symbols in .config'
@@ -127,16 +150,24 @@ help:
        @echo '  defconfig              - set .config to largest generic configuration'
        @echo '  menuconfig             - interactive curses-based configurator'
        @echo '  oldconfig              - resolve any unresolved symbols in .config'
+       @echo '  hosttools              - build sed for the host.'
+       @echo '                           You can use these commands if the commands on the host'
+       @echo '                           is unusable. Afterwards use it like:'
+       @echo '                   make SED="$(top_builddir)/sed"'
        @echo
        @echo 'Installation:'
-       @echo '  install                - install busybox into $prefix'
+       @echo '  install                - install busybox into $(PREFIX)'
        @echo '  uninstall'
        @echo
        @echo 'Development:'
+       @echo '  baseline               - create busybox_old for bloatcheck.'
+       @echo '  bloatcheck             - show size difference between old and new versions'
        @echo '  check                  - run the test suite for all applets'
+       @echo '  checkhelp              - check for missing help-entries in Config.in'
        @echo '  randconfig             - generate a random configuration'
        @echo '  release                - create a distribution tarball'
        @echo '  sizes                  - show size of all enabled busybox symbols'
+       @echo '  objsizes               - show size of each .o object built'
        @echo
 
 
@@ -161,16 +192,17 @@ all: menuconfig
 scripts/config/conf: scripts/config/Makefile
        $(Q)$(MAKE) -C scripts/config conf
        -@if [ ! -f .config ] ; then \
-               cp $(CONFIG_DEFCONFIG) .config; \
+               touch .config; \
        fi
 
 scripts/config/mconf: scripts/config/Makefile
        $(Q)$(MAKE) -C scripts/config ncurses conf mconf
        -@if [ ! -f .config ] ; then \
-               cp $(CONFIG_DEFCONFIG) .config; \
+               touch .config; \
        fi
 
 menuconfig: scripts/config/mconf
+       @[ -f .config ] || $(MAKE) $(MAKEFLAGS) defconfig
        @./scripts/config/mconf $(CONFIG_CONFIG_IN)
 
 config: scripts/config/conf
@@ -183,29 +215,39 @@ randconfig: scripts/config/conf
        @./scripts/config/conf -r $(CONFIG_CONFIG_IN)
 
 allyesconfig: scripts/config/conf
-       @./scripts/config/conf -y $(CONFIG_CONFIG_IN)
-       sed -i -r -e "s/^(USING_CROSS_COMPILER)=.*/# \1 is not set/" .config
-       @./scripts/config/conf -o $(CONFIG_CONFIG_IN)
+       @./scripts/config/conf -y $(CONFIG_CONFIG_IN) > /dev/null
 
 allnoconfig: scripts/config/conf
-       @./scripts/config/conf -n $(CONFIG_CONFIG_IN)
+       @./scripts/config/conf -n $(CONFIG_CONFIG_IN) > /dev/null
 
 # defconfig is allyesconfig minus any features that are specialized enough
 # or cause enough behavior change that the user really should switch them on
 # manually if that's what they want.  Sort of "maximum sane config".
 
 defconfig: scripts/config/conf
-       @./scripts/config/conf -y $(CONFIG_CONFIG_IN)
-       sed -i -r -e "s/^(USING_CROSS_COMPILER|CONFIG_(DEBUG.*|STATIC|SELINUX|BUILD_(AT_ONCE|LIBBUSYBOX)|FEATURE_(DEVFS|FULL_LIBBUSYBOX|SHARED_BUSYBOX|MTAB_SUPPORT|CLEAN_UP|UDHCP_DEBUG)))=.*/# \1 is not set/" .config
-       @./scripts/config/conf -o $(CONFIG_CONFIG_IN)
+       @./scripts/config/conf -y $(CONFIG_CONFIG_IN) > /dev/null
+       @$(SED) -i -r -e "s/^(CONFIG_(DEBUG.*|STATIC|SELINUX|BUILD_(AT_ONCE|LIBBUSYBOX)|FEATURE_(DEVFS|FULL_LIBBUSYBOX|SHARED_BUSYBOX|MTAB_SUPPORT|CLEAN_UP|UDHCP_DEBUG)|INSTALL_NO_USR))=.*/# \1 is not set/" .config
+       @./scripts/config/conf -o $(CONFIG_CONFIG_IN) > /dev/null
 
 
 allbareconfig: scripts/config/conf
-       @./scripts/config/conf -y $(CONFIG_CONFIG_IN)
-       @sed -i -r -e "s/^(USING_CROSS_COMPILER|CONFIG_(DEBUG|STATIC|SELINUX|DEVFSD|NC_GAPING_SECURITY_HOLE|BUILD_AT_ONCE)).*/# \1 is not set/" .config
-       @sed -i -e "/FEATURE/s/=.*//;/^[^#]/s/.*FEATURE.*/# \0 is not set/;" .config
+       @./scripts/config/conf -y $(CONFIG_CONFIG_IN) > /dev/null
+       @$(SED) -i -r -e "s/^(CONFIG_(DEBUG|STATIC|SELINUX|DEVFSD|NC_GAPING_SECURITY_HOLE|BUILD_AT_ONCE)).*/# \1 is not set/" .config
+       @$(SED) -i -e "/FEATURE/s/=.*//;/^[^#]/s/.*FEATURE.*/# \0 is not set/;" .config
        @echo "CONFIG_FEATURE_BUFFERS_GO_ON_STACK=y" >> .config
-       @./scripts/config/conf -o $(CONFIG_CONFIG_IN)
+       @yes n | ./scripts/config/conf -o $(CONFIG_CONFIG_IN) > /dev/null
+
+hosttools:
+       $(Q)cp .config .config.bak || noold=yea
+       $(Q)$(MAKE) CC="$(HOSTCC)" CFLAGS="$(HOSTCFLAGS) $(INCS)" allnoconfig
+       $(Q)mv .config .config.in
+       $(Q)(grep -v CONFIG_SED .config.in ; \
+        echo "CONFIG_SED=y" ; ) > .config
+       $(Q)$(MAKE) CC="$(HOSTCC)" CFLAGS="$(HOSTCFLAGS) $(INCS)" oldconfig include/bb_config.h
+       $(Q)$(MAKE) CC="$(HOSTCC)" CFLAGS="$(HOSTCFLAGS) $(INCS)" busybox
+       $(Q)[ -f .config.bak ] && mv .config.bak .config || rm .config
+       mv busybox sed
+       @echo "Now do: $(MAKE) SED=$(top_builddir)/sed <target>"
 
 else # ifneq ($(strip $(HAVE_DOT_CONFIG)),y)
 
@@ -258,6 +300,7 @@ LIBBUSYBOX_SONAME:=$(LD_LIBBUSYBOX).$(MAJOR_VERSION).$(MINOR_VERSION).$(SUBLEVEL
 DO_INSTALL_LIBS:=$(LD_LIBBUSYBOX) \
        $(LD_LIBBUSYBOX).$(MAJOR_VERSION) \
        $(LD_LIBBUSYBOX).$(MAJOR_VERSION).$(MINOR_VERSION)
+endif # CONFIG_BUILD_LIBBUSYBOX
 
 ifeq ($(strip $(CONFIG_BUILD_AT_ONCE)),y)
 ifneq ($(strip $(CONFIG_FEATURE_SHARED_BUSYBOX)),y)
@@ -269,7 +312,6 @@ $(LIBBUSYBOX_SONAME): $(LIBRARY_SRC)
 else # CONFIG_BUILD_AT_ONCE
 $(LIBBUSYBOX_SONAME): $(libbusybox-obj)
 endif # CONFIG_BUILD_AT_ONCE
-endif # CONFIG_BUILD_LIBBUSYBOX
 
 ifeq ($(strip $(CONFIG_FEATURE_SHARED_BUSYBOX)),y)
 LDBUSYBOX:=-L$(top_builddir) -lbusybox
@@ -280,33 +322,30 @@ $(LIBBUSYBOX_SONAME):
 ifndef MAJOR_VERSION
        $(error MAJOR_VERSION needed for $@ is not defined)
 endif
-       $(do_link) $(LIB_CFLAGS) $(LIB_LDFLAGS) \
+       $(do_link.so) \
        -Wl,-soname=$(LD_LIBBUSYBOX).$(MAJOR_VERSION) \
-       -Wl,-z,combreloc $(LIB_LDFLAGS) \
-       -o $(@) \
-       -Wl,--start-group -Wl,--whole-archive \
-       $(LIBRARY_DEFINE) $(^) \
-       -Wl,--no-whole-archive -Wl,--end-group
-       $(RM_F) $(DO_INSTALL_LIBS)
-       for i in $(DO_INSTALL_LIBS); do $(LN_S) -v $(@) $$i ; done
+       -Wl,-z,combreloc
+       @rm -f $(DO_INSTALL_LIBS)
+       @for i in $(DO_INSTALL_LIBS); do ln -s $(@) $$i ; done
        $(do_strip)
 
 endif # ifeq ($(strip $(CONFIG_BUILD_LIBBUSYBOX)),y)
 
-busybox: .depend $(LIBBUSYBOX_SONAME) $(BUSYBOX_SRC) $(libraries-y)
-       $(do_link) $(PROG_CFLAGS) \
-       -o $@ -Wl,--start-group  \
-       $(APPLETS_DEFINE) $(APPLET_SRC) \
-       $(BUSYBOX_DEFINE) $(BUSYBOX_SRC) $(libraries-y) \
-       $(LDBUSYBOX) $(LIBRARIES) \
-       -Wl,--end-group
+busybox_unstripped: .depend $(LIBBUSYBOX_SONAME) $(BUSYBOX_SRC) $(APPLET_SRC) $(libraries-y)
+       $(do_link)
+
+busybox: busybox_unstripped
+       $(Q)cp busybox_unstripped busybox
        $(do_strip)
 
+%.bflt: %_unstripped
+       $(do_elf2flt)
+
 busybox.links: $(top_srcdir)/applets/busybox.mkll include/bb_config.h $(top_srcdir)/include/applets.h
        $(Q)-$(SHELL) $^ >$@
 
 install: $(top_srcdir)/applets/install.sh busybox busybox.links
-       DO_INSTALL_LIBS="$(strip $(LIBBUSYBOX_SONAME) $(DO_INSTALL_LIBS))" \
+       $(Q)DO_INSTALL_LIBS="$(strip $(LIBBUSYBOX_SONAME) $(DO_INSTALL_LIBS))" \
                $(SHELL) $< $(PREFIX) $(INSTALL_OPTS)
 ifeq ($(strip $(CONFIG_FEATURE_SUID)),y)
        @echo
@@ -320,34 +359,33 @@ ifeq ($(strip $(CONFIG_FEATURE_SUID)),y)
 endif
 
 uninstall: busybox.links
-       $(RM_F) $(PREFIX)/bin/busybox
-       for i in `cat busybox.links` ; do $(RM_F) $(PREFIX)$$i; done
+       rm -f $(PREFIX)/bin/busybox
+       for i in `cat busybox.links` ; do rm -f $(PREFIX)$$i; done
 ifneq ($(strip $(DO_INSTALL_LIBS)),n)
        for i in $(LIBBUSYBOX_SONAME) $(DO_INSTALL_LIBS); do \
-               $(RM_F) $(PREFIX)$$i; \
+               rm -f $(PREFIX)$$i; \
        done
 endif
 
-# see if we are in verbose mode
-KBUILD_VERBOSE :=
-ifdef V
-  ifeq ("$(origin V)", "command line")
-    KBUILD_VERBOSE := $(V)
-  endif
-endif
-ifneq ($(strip $(KBUILD_VERBOSE)),)
-  CHECK_VERBOSE := -v
-# ARFLAGS+=v
-endif
 check test: busybox
-       bindir=$(top_builddir) srcdir=$(top_srcdir)/testsuite \
-       $(top_srcdir)/testsuite/runtest $(CHECK_VERBOSE)
+       bindir=$(top_builddir) srcdir=$(top_srcdir)/testsuite SED="$(SED)" \
+       $(SHELL) $(top_srcdir)/testsuite/runtest $(CHECK_VERBOSE)
 
-sizes:
-       -$(RM_F) busybox
-       $(MAKE) top_srcdir=$(top_srcdir) top_builddir=$(top_builddir) \
-               -f $(top_srcdir)/Makefile STRIPCMD=/bin/true
-       $(NM) --size-sort busybox
+checkhelp:
+       $(Q)$(top_srcdir)/scripts/checkhelp.awk \
+               $(wildcard $(patsubst %,%/Config.in,$(SRC_DIRS) ./))
+
+sizes: busybox_unstripped
+       $(NM) --size-sort $(<)
+
+bloatcheck: busybox_old busybox_unstripped
+       @$(top_srcdir)/scripts/bloat-o-meter busybox_old busybox_unstripped
+
+baseline: busybox_unstripped
+       @mv busybox_unstripped busybox_old
+
+objsizes: busybox_unstripped
+       $(SHELL) $(top_srcdir)/scripts/objsizes
 
 # Documentation Targets
 doc: docs/busybox.pod docs/BusyBox.txt docs/BusyBox.1 docs/BusyBox.html
@@ -355,9 +393,9 @@ doc: docs/busybox.pod docs/BusyBox.txt docs/BusyBox.1 docs/BusyBox.html
 docs/busybox.pod : $(top_srcdir)/docs/busybox_header.pod $(top_srcdir)/include/usage.h $(top_srcdir)/docs/busybox_footer.pod $(top_srcdir)/docs/autodocifier.pl
        $(disp_doc)
        $(Q)-mkdir -p docs
-       $(Q)-( 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
+       $(Q)-( 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
        $(disp_doc)
@@ -373,33 +411,47 @@ docs/BusyBox.1: docs/busybox.pod
 docs/BusyBox.html: docs/busybox.net/BusyBox.html
        $(disp_doc)
        $(Q)-mkdir -p docs
-       $(Q)-$(RM_F) docs/BusyBox.html
+       $(Q)-rm -f docs/BusyBox.html
        $(Q)-cp docs/busybox.net/BusyBox.html docs/BusyBox.html
 
 docs/busybox.net/BusyBox.html: docs/busybox.pod
        $(Q)-mkdir -p docs/busybox.net
        $(Q)-pod2html --noindex $< > \
            docs/busybox.net/BusyBox.html
-       $(Q)-$(RM_F) pod2htm*
+       $(Q)-rm -f pod2htm*
 
-# The nifty new buildsystem stuff
+# The nifty new dependency stuff
 scripts/bb_mkdep: $(top_srcdir)/scripts/bb_mkdep.c
-       $(HOSTCC) $(HOSTCFLAGS) -o $@ $<
+       $(do_link.h)
 
 DEP_INCLUDES := include/bb_config.h
 
 ifeq ($(strip $(CONFIG_BBCONFIG)),y)
 DEP_INCLUDES += include/bbconfigopts.h
 
-include/bbconfigopts.h: .config
+include/bbconfigopts.h: .config $(top_srcdir)/scripts/config/mkconfigs
        $(disp_gen)
        $(Q)$(top_srcdir)/scripts/config/mkconfigs > $@
 endif
 
+ifeq ($(strip $(CONFIG_FEATURE_COMPRESS_USAGE)),y)
+USAGE_BIN:=scripts/usage
+$(USAGE_BIN): $(top_srcdir)/scripts/usage.c .config
+       $(do_link.h)
+
+DEP_INCLUDES += include/usage_compressed.h
+
+include/usage_compressed.h: .config $(USAGE_BIN) $(top_srcdir)/scripts/usage_compressed
+       $(Q)SED="$(SED)" $(SHELL) $(top_srcdir)/scripts/usage_compressed "$(top_builddir)/scripts" > $@
+endif # CONFIG_FEATURE_COMPRESS_USAGE
+
+# workaround alleged bug in make-3.80, make-3.81
+.NOTPARALLEL: .depend
+
 depend dep: .depend
-.depend: scripts/bb_mkdep $(DEP_INCLUDES)
+.depend: scripts/bb_mkdep $(USAGE_BIN) $(DEP_INCLUDES)
        $(disp_gen)
-       $(Q)$(RM_F) .depend
+       $(Q)rm -f .depend
        $(Q)mkdir -p include/config
        $(Q)scripts/bb_mkdep -I $(top_srcdir)/include $(top_srcdir) > $@.tmp
        $(Q)mv $@.tmp $@
@@ -412,47 +464,55 @@ include/bb_config.h: .config
 
 clean:
        - $(MAKE) -C scripts/config $@
-       - $(RM_F) docs/busybox.dvi docs/busybox.ps \
+       - rm -f docs/busybox.dvi docs/busybox.ps \
            docs/busybox.pod docs/busybox.net/busybox.html \
            docs/busybox pod2htm* *.gdb *.elf *~ core .*config.log \
            docs/BusyBox.txt docs/BusyBox.1 docs/BusyBox.html \
            docs/busybox.net/BusyBox.html busybox.links \
-           $(DO_INSTALL_LIBS) $(LIBBUSYBOX_SONAME) \
-           .config.old busybox
-       - rm -rf _install testsuite/links
-       - find . -name .\*.flags -exec $(RM_F) {} \;
-       - find . -name \*.o -exec $(RM_F) {} \;
-       - find . -name \*.a -exec $(RM_F) {} \;
-       - find . -name \*.so -exec $(RM_F) {} \;
+           libbusybox.so* \
+           .config.old busybox busybox_unstripped
+       - rm -r -f _install testsuite/links
+       - find . -name .\*.flags -o -name \*.o  -o -name \*.om -o -name \*.syn \
+           -o -name \*.os -o -name \*.osm -o -name \*.a | xargs rm -f
 
 distclean: clean
-       - $(RM_F) scripts/bb_mkdep
-       - rm -rf include/config $(DEP_INCLUDES)
-       - find . -name .depend -exec $(RM_F) {} \;
-       $(RM_F) .config .config.old .config.cmd
+       rm -f scripts/bb_mkdep scripts/usage
+       rm -r -f include/config include/config.h $(DEP_INCLUDES)
+       find . -name .depend'*' -print0 | xargs -0 rm -f
+       rm -f .hdepend
+       rm -f .config .config.old .config.cmd
 
 release: distclean #doc
        cd ..; \
-       rm -rf $(PROG)-$(VERSION); \
+       rm -r -f $(PROG)-$(VERSION); \
        cp -a busybox $(PROG)-$(VERSION); \
        \
        find $(PROG)-$(VERSION)/ -type d \
                -name .svn \
                -print \
-               -exec rm -rf {} \; ; \
+               -exec rm -r -f {} \; ; \
        \
        find $(PROG)-$(VERSION)/ -type f \
                -name .\#* \
                -print \
-               -exec $(RM_F) {} \; ; \
+               -exec rm -f {} \; ; \
        \
        tar -cvzf $(PROG)-$(VERSION).tar.gz $(PROG)-$(VERSION)/;
 
 tags:
        ctags -R .
 
+# documentation, cross-reference
+# Modern distributions already ship synopsis packages (e.g. debian)
+# If you have an old distribution go to http://synopsis.fresco.org/
+syn_tgt := $(wildcard $(patsubst %,%/*.c,$(SRC_DIRS)))
+syn     := $(patsubst %.c, %.syn, $(syn_tgt))
+
+%.syn: %.c
+       synopsis -p C -l Comments.SSDFilter,Comments.Previous $(INCS) -Wp,verbose,debug,preprocess,cppflags="'$(CFLAGS) $(EXTRA_CFLAGS) $(LDFLAGS) $(PROG_CFLAGS) $(PROG_LDFLAGS) $(CFLAGS_COMBINE) $(APPLETS_DEFINE) $(BUSYBOX_DEFINE)'" -o $@ $<
+html: $(syn)
+       synopsis -f HTML -Wf,title="'BusyBox Documentation'" -o $@ $^
+
 
 endif # ifeq ($(skip-makefile),)
 
-.PHONY: dummy subdirs release distclean clean config oldconfig \
-       menuconfig tags check test depend dep buildtree