export srctree objtree VPATH TOPDIR
- nullstring :=
- space := $(nullstring) # end of line
-
- # Take the contents of any files called localversion* and the config
- # variable CONFIG_LOCALVERSION and append them to KERNELRELEASE. Be
- # careful not to include files twice if building in the source
- # directory. LOCALVERSION from the command line override all of this
-
- localver := $(objtree)/localversion* $(srctree)/localversion*
- localver := $(sort $(wildcard $(localver)))
- # skip backup files (containing '~')
- localver := $(foreach f, $(localver), $(if $(findstring ~, $(f)),,$(f)))
-
- LOCALVERSION = $(subst $(space),, \
- $(shell cat /dev/null $(localver)) \
- $(patsubst "%",%,$(CONFIG_LOCALVERSION)))
-
- KERNELRELEASE=$(VERSION).$(PATCHLEVEL).$(SUBLEVEL)$(EXTRAVERSION)$(LOCALVERSION)
# SUBARCH tells the usermode build what the underlying arch is. That is set
# first, and if a usermode build is happening, the "ARCH=um" on the command
# If it is set to "silent_", nothing wil be printed at all, since
# the variable $(silent_cmd_cc_o_c) doesn't exist.
#
-# A simple variant is to prefix commands with $(Q) - that's usefull
+# A simple variant is to prefix commands with $(Q) - that's useful
# for commands that shall be hidden in non-verbose mode.
#
# $(Q)ln $@ :<
-ffreestanding
AFLAGS := -D__ASSEMBLY__
- export VERSION PATCHLEVEL SUBLEVEL EXTRAVERSION LOCALVERSION KERNELRELEASE \
+ # Read KERNELRELEASE from .kernelrelease (if it exists)
+ KERNELRELEASE = $(shell cat .kernelrelease 2> /dev/null)
+
+ export VERSION PATCHLEVEL SUBLEVEL KERNELRELEASE \
ARCH CONFIG_SHELL HOSTCC HOSTCFLAGS CROSS_COMPILE AS LD CC \
CPP AR NM STRIP OBJCOPY OBJDUMP MAKE AWK GENKSYMS PERL UTS_MACHINE \
HOSTCXX HOSTCXXFLAGS LDFLAGS_MODULE CHECK CHECKFLAGS
# images. Default is /boot, but you can set it to other values
export INSTALL_PATH ?= /boot
- # If CONFIG_LOCALVERSION_AUTO is set, we automatically perform some tests
- # and try to determine if the current source tree is a release tree, of any sort,
- # or if is a pure development tree.
- #
- # A 'release tree' is any tree with a git TAG associated
- # with it. The primary goal of this is to make it safe for a native
- # git/CVS/SVN user to build a release tree (i.e, 2.6.9) and also to
- # continue developing against the current Linus tree, without having the Linus
- # tree overwrite the 2.6.9 tree when installed.
- #
- # Currently, only git is supported.
- # Other SCMs can edit scripts/setlocalversion and add the appropriate
- # checks as needed.
-
-
- ifdef CONFIG_LOCALVERSION_AUTO
- localversion-auto := $(shell $(PERL) $(srctree)/scripts/setlocalversion $(srctree))
- LOCALVERSION := $(LOCALVERSION)$(localversion-auto)
- endif
-
#
# INSTALL_MOD_PATH specifies a prefix to MODLIB for module directory
# relocations required by build roots. This is not defined in the
$(vmlinux-dirs): prepare scripts
$(Q)$(MAKE) $(build)=$@
+ # Build the kernel release string
+ # The KERNELRELEASE is stored in a file named .kernelrelease
+ # to be used when executing for example make install or make modules_install
+ #
+ # Take the contents of any files called localversion* and the config
+ # variable CONFIG_LOCALVERSION and append them to KERNELRELEASE.
+ # LOCALVERSION from the command line override all of this
+
+ nullstring :=
+ space := $(nullstring) # end of line
+
+ ___localver = $(objtree)/localversion* $(srctree)/localversion*
+ __localver = $(sort $(wildcard $(___localver)))
+ # skip backup files (containing '~')
+ _localver = $(foreach f, $(__localver), $(if $(findstring ~, $(f)),,$(f)))
+
+ localver = $(subst $(space),, \
+ $(shell cat /dev/null $(_localver)) \
+ $(patsubst "%",%,$(CONFIG_LOCALVERSION)))
+
+ # If CONFIG_LOCALVERSION_AUTO is set scripts/setlocalversion is called
+ # and if the SCM is know a tag from the SCM is appended.
+ # The appended tag is determinded by the SCM used.
+ #
+ # Currently, only git is supported.
+ # Other SCMs can edit scripts/setlocalversion and add the appropriate
+ # checks as needed.
+ ifdef CONFIG_LOCALVERSION_AUTO
+ _localver-auto = $(shell $(CONFIG_SHELL) \
+ $(srctree)/scripts/setlocalversion $(srctree))
+ localver-auto = $(LOCALVERSION)$(_localver-auto)
+ endif
+
+ localver-full = $(localver)$(localver-auto)
+
+ # Store (new) KERNELRELASE string in .kernelrelease
+ kernelrelease = \
+ $(VERSION).$(PATCHLEVEL).$(SUBLEVEL)$(EXTRAVERSION)$(localver-full)
+ .kernelrelease: FORCE
+ $(Q)rm -f .kernelrelease
+ $(Q)echo $(kernelrelease) > .kernelrelease
+ $(Q)echo " Building kernel $(kernelrelease)"
+
+
# Things we need to do before we recursively start building the kernel
# or the modules are listed in "prepare".
# A multi level approach is used. prepareN is processed before prepareN-1.
# and if so do:
# 1) Check that make has not been executed in the kernel src $(srctree)
# 2) Create the include2 directory, used for the second asm symlink
-
- prepare3:
+ prepare3: .kernelrelease
ifneq ($(KBUILD_SRC),)
@echo ' Using $(srctree) as source for kernel'
$(Q)if [ -f $(srctree)/.config ]; then \
# Directories & files removed with 'make mrproper'
MRPROPER_DIRS += include/config include2
- MRPROPER_FILES += .config .config.old include/asm .version \
+ MRPROPER_FILES += .config .config.old include/asm .version .old_version \
include/linux/autoconf.h include/linux/version.h \
- Module.symvers tags TAGS cscope*
+ .kernelrelease Module.symvers tags TAGS cscope*
# clean - Delete most, but leave enough to build external modules
#
@echo ' tags/TAGS - Generate tags file for editors'
@echo ' cscope - Generate cscope index'
@echo ' kernelrelease - Output the release version string'
+ @echo ' kernelversion - Output the version stored in Makefile'
@echo ''
@echo 'Static analysers'
@echo ' buildcheck - List dangling references to vmlinux discarded sections'
kernelrelease:
@echo $(KERNELRELEASE)
+ kernelversion:
+ @echo $(VERSION).$(PATCHLEVEL).$(SUBLEVEL)$(EXTRAVERSION)
# FIXME Should go into a make.lib or something
# ===========================================================================
projects / ~andy / linux / commitdiff