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Commit 2514395e authored by Linus Torvalds's avatar Linus Torvalds
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Merge git://git.kernel.org/pub/scm/linux/kernel/git/sam/kbuild 

* git://git.kernel.org/pub/scm/linux/kernel/git/sam/kbuild:
  kconfig: fix typo in change count initialization
  kconfig: recenter menuconfig
  kconfig: revert conf behaviour change
  kconfig: fix default value for choice input
  kbuild: fix NULL dereference in scripts/mod/modpost.c
  kbuild: fix mode of checkstack.pl and other files.
  kbuild: rebuild initramfs if content of initramfs changes
  kbuild: properly pass options to hostcc when doing make O=..
  kbuild: modules_install for external modules must not remove existing modules
  kbuild: fix make dir/
  ver_linux: don't print reiser4progs version if none found
  kbuild: mips: fix sed regexp to generate asm-offset.h
  kbuild: fix building single targets with make O=.. single-target
  kbuild: use relative path to -I
  kbuild: fix unneeded rebuilds in drivers/net/chelsio after moving source tree
  kbuild: fix unneeded rebuilds in drivers/media/video after moving source tree
  kbuild: fix garbled text in modules.txt
parents b3967dc5 b5ac4817

Documentation/kbuild/modules.txt

+1 −1
Original line number Diff line number Diff line
@@ -44,7 +44,7 @@ What is covered within this file is mainly information to authors 
of modules. The author of an external modules should supply

a makefile that hides most of the complexity so one only has to type

'make' to build the module. A complete example will be present in

chapter ¤. Creating a kbuild file for an external module".

chapter 4, "Creating a kbuild file for an external module".





=== 2. How to build external modules

Kbuild

+1 −1
Original line number Diff line number Diff line
@@ -18,7 +18,7 @@ define sed-y 
	"/^->/{s:^->\([^ ]*\) [\$$#]*\([^ ]*\) \(.*\):#define \1 \2 /* \3 */:; s:->::; p;}"

endef

# Override default regexp for specific architectures

sed-$(CONFIG_MIPS) := "/^@@@/s///p"

sed-$(CONFIG_MIPS) := "/^@@@/{s/^@@@//; s/ \#.*\$$//; p;}"



quiet_cmd_offsets = GEN     $@

define cmd_offsets

Makefile

+28 −26
Original line number Diff line number Diff line
@@ -1112,7 +1112,6 @@ modules_install: _emodinst_ _emodinst_post 
install-dir := $(if $(INSTALL_MOD_DIR),$(INSTALL_MOD_DIR),extra)

PHONY += _emodinst_

_emodinst_:

	$(Q)rm -rf $(MODLIB)/$(install-dir)

	$(Q)mkdir -p $(MODLIB)/$(install-dir)

	$(Q)$(MAKE) -rR -f $(srctree)/scripts/Makefile.modinst
@@ -1275,40 +1274,43 @@ kernelversion: 


# Single targets

# ---------------------------------------------------------------------------

# The directory part is taken from first prerequisite, so this

# works even with external modules

# Single targets are compatible with:

# - build whith mixed source and output

# - build with separate output dir 'make O=...'

# - external modules

#

#  target-dir => where to store outputfile

#  build-dir  => directory in kernel source tree to use



ifeq ($(KBUILD_EXTMOD),)

        build-dir  = $(patsubst %/,%,$(dir $@))

        target-dir = $(dir $@)

else

        zap-slash=$(filter-out .,$(patsubst %/,%,$(dir $@)))

        build-dir  = $(KBUILD_EXTMOD)$(if $(zap-slash),/$(zap-slash))

        target-dir = $(if $(KBUILD_EXTMOD),$(dir $<),$(dir $@))

endif



%.s: %.c prepare scripts FORCE

	$(Q)$(MAKE) $(build)=$(dir $<) $(dir $<)$(notdir $@)

	$(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)

%.i: %.c prepare scripts FORCE

	$(Q)$(MAKE) $(build)=$(dir $<) $(dir $<)$(notdir $@)

	$(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)

%.o: %.c prepare scripts FORCE

	$(Q)$(MAKE) $(build)=$(dir $<) $(dir $<)$(notdir $@)

	$(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)

%.lst: %.c prepare scripts FORCE

	$(Q)$(MAKE) $(build)=$(dir $<) $(dir $<)$(notdir $@)

	$(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)

%.s: %.S prepare scripts FORCE

	$(Q)$(MAKE) $(build)=$(dir $<) $(dir $<)$(notdir $@)

	$(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)

%.o: %.S prepare scripts FORCE

	$(Q)$(MAKE) $(build)=$(dir $<) $(dir $<)$(notdir $@)

	$(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)



# For external modules we shall include any directory of the target,

# but usual case there is no directory part.

# make M=`pwd` module.o     => $(dir $@)=./

# make M=`pwd` foo/module.o => $(dir $@)=foo/

# make M=`pwd` /            => $(dir $@)=/

 

ifeq ($(KBUILD_EXTMOD),)

        target-dir = $(@D)

else

        zap-slash=$(filter-out .,$(patsubst %/,%,$(dir $@)))

        target-dir = $(KBUILD_EXTMOD)$(if $(zap-slash),/$(zap-slash))

endif



/ %/:      scripts prepare FORCE

# Modules

/ %/: prepare scripts FORCE

	$(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \

	$(build)=$(target-dir)

%.ko: scripts FORCE

	$(build)=$(build-dir)

%.ko: prepare scripts FORCE

	$(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1)   \

	$(build)=$(target-dir) $(@:.ko=.o)

	$(build)=$(build-dir) $(@:.ko=.o)

	$(Q)$(MAKE) -rR -f $(srctree)/scripts/Makefile.modpost



# FIXME Should go into a make.lib or something

arch/ppc/boot/lib/Makefile

+1 −1
Original line number Diff line number Diff line
@@ -3,7 +3,7 @@ 
#



CFLAGS_kbd.o	:= -Idrivers/char

CFLAGS_vreset.o := -I$(srctree)/arch/ppc/boot/include

CFLAGS_vreset.o := -Iarch/ppc/boot/include



zlib  := infblock.c infcodes.c inffast.c inflate.c inftrees.c infutil.c

arch/sparc/math-emu/Makefile

+1 −1
Original line number Diff line number Diff line
@@ -5,4 +5,4 @@ 
obj-y    := math.o



EXTRA_AFLAGS := -ansi

EXTRA_CFLAGS = -I. -I$(TOPDIR)/include/math-emu -w
 
EXTRA_CFLAGS = -I. -Iinclude/math-emu -w