X-Git-Url: http://git.onelab.eu/?a=blobdiff_plain;f=Makefile;h=a1195635869ba4538bd32f444bc4dfa024d6463c;hb=c7b5ebbddf7bcd3651947760f423e3783bbe6573;hp=c52759dd34ae649621c18da06482ab79cc65a1b6;hpb=a2c21200f1c81b08cb55e417b68150bba439b646;p=linux-2.6.git diff --git a/Makefile b/Makefile index c52759dd3..a11956358 100644 --- a/Makefile +++ b/Makefile @@ -1,7 +1,7 @@ VERSION = 2 PATCHLEVEL = 6 -SUBLEVEL = 8 -EXTRAVERSION = +SUBLEVEL = 9 +EXTRAVERSION = -vs1.9.3 NAME=Zonked Quokka # *DOCUMENTATION* @@ -102,7 +102,7 @@ ifneq ($(KBUILD_OUTPUT),) # check that the output directory actually exists saved-output := $(KBUILD_OUTPUT) KBUILD_OUTPUT := $(shell cd $(KBUILD_OUTPUT) && /bin/pwd) -$(if $(wildcard $(KBUILD_OUTPUT)),, \ +$(if $(KBUILD_OUTPUT),, \ $(error output directory "$(saved-output)" does not exist)) .PHONY: $(MAKECMDGOALS) @@ -141,7 +141,25 @@ VPATH := $(srctree) export srctree objtree VPATH TOPDIR -KERNELRELEASE=$(VERSION).$(PATCHLEVEL).$(SUBLEVEL)$(EXTRAVERSION) +nullstring := +space := $(nullstring) # end of line + +# Take the contents of any files called localversion* and the config +# variable CONFIG_LOCALVERSION and append them to KERNELRELEASE. Be +# careful not to include files twice if building in the source +# directory. LOCALVERSION from the command line override all of this + +ifeq ($(objtree),$(srctree)) +localversion-files := $(wildcard $(srctree)/localversion*) +else +localversion-files := $(wildcard $(objtree)/localversion* $(srctree)/localversion*) +endif + +LOCALVERSION = $(subst $(space),, \ + $(shell cat /dev/null $(localversion-files)) \ + $(subst ",,$(CONFIG_LOCALVERSION))) + +KERNELRELEASE=$(VERSION).$(PATCHLEVEL).$(SUBLEVEL)$(EXTRAVERSION)$(LOCALVERSION) # SUBARCH tells the usermode build what the underlying arch is. That is set # first, and if a usermode build is happening, the "ARCH=um" on the command @@ -256,9 +274,32 @@ ifneq ($(findstring s,$(MAKEFLAGS)),) quiet=silent_ endif -check_gcc = $(shell if $(CC) $(CFLAGS) $(1) -S -o /dev/null -xc /dev/null > /dev/null 2>&1; then echo "$(1)"; else echo "$(2)"; fi ;) +export quiet Q KBUILD_VERBOSE + +###### +# cc support functions to be used (only) in arch/$(ARCH)/Makefile +# See documentation in Documentation/kbuild/makefiles.txt + +# cc-option +# Usage: cflags-y += $(call gcc-option, -march=winchip-c6, -march=i586) + +cc-option = $(shell if $(CC) $(CFLAGS) $(1) -S -o /dev/null -xc /dev/null \ + > /dev/null 2>&1; then echo "$(1)"; else echo "$(2)"; fi ;) + +# For backward compatibility +check_gcc = $(warning check_gcc is deprecated - use cc-option) \ + $(call cc-option, $(1),$(2)) + +# cc-option-yn +# Usage: flag := $(call gcc-option-yn, -march=winchip-c6) +cc-option-yn = $(shell if $(CC) $(CFLAGS) $(1) -S -o /dev/null -xc /dev/null \ + > /dev/null 2>&1; then echo "y"; else echo "n"; fi;) + +# cc-version +# Usage gcc-ver := $(call cc-version $(CC)) +cc-version = $(shell $(CONFIG_SHELL) $(srctree)/scripts/gcc-version.sh \ + $(if $(1), $(1), $(CC))) -export quiet Q KBUILD_VERBOSE check_gcc # Look for make include files relative to root of kernel src MAKEFLAGS += --include-dir=$(srctree) @@ -285,6 +326,7 @@ DEPMOD = /sbin/depmod KALLSYMS = scripts/kallsyms PERL = perl CHECK = sparse +CHECKFLAGS := -D__linux__ -Dlinux -D__STDC__ -Dunix -D__unix__ MODFLAGS = -DMODULE CFLAGS_MODULE = $(MODFLAGS) AFLAGS_MODULE = $(MODFLAGS) @@ -294,19 +336,23 @@ AFLAGS_KERNEL = NOSTDINC_FLAGS = -nostdinc -iwithprefix include -CPPFLAGS := -D__KERNEL__ -Iinclude \ - $(if $(KBUILD_SRC),-Iinclude2 -I$(srctree)/include) +# Use LINUXINCLUDE when you must reference the include/ directory. +# Needed to be compatible with the O= option +LINUXINCLUDE := -Iinclude \ + $(if $(KBUILD_SRC),-Iinclude2 -I$(srctree)/include) + +CPPFLAGS := -D__KERNEL__ $(LINUXINCLUDE) CFLAGS := -Wall -Wstrict-prototypes -Wno-trigraphs \ -fno-strict-aliasing -fno-common AFLAGS := -D__ASSEMBLY__ -export VERSION PATCHLEVEL SUBLEVEL EXTRAVERSION KERNELRELEASE ARCH \ - CONFIG_SHELL HOSTCC HOSTCFLAGS CROSS_COMPILE AS LD CC \ +export VERSION PATCHLEVEL SUBLEVEL EXTRAVERSION LOCALVERSION 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_BLOB LDFLAGS_MODULE CHECK + HOSTCXX HOSTCXXFLAGS LDFLAGS_MODULE CHECK CHECKFLAGS -export CPPFLAGS NOSTDINC_FLAGS OBJCOPYFLAGS LDFLAGS +export CPPFLAGS NOSTDINC_FLAGS LINUXINCLUDE OBJCOPYFLAGS LDFLAGS export CFLAGS CFLAGS_KERNEL CFLAGS_MODULE export AFLAGS AFLAGS_KERNEL AFLAGS_MODULE @@ -428,15 +474,6 @@ else include/linux/autoconf.h: ; endif -include $(srctree)/arch/$(ARCH)/Makefile - -# Default kernel image to build when no specific target is given. -# KBUILD_IMAGE may be overruled on the commandline or -# set in the environment -# Also any assingments in arch/$(ARCH)/Makefiel take precedence over -# this default value -export KBUILD_IMAGE ?= vmlinux - # The all: target is the default when no target is given on the # command line. # This allow a user to issue only 'make' to build a kernel including modules @@ -458,7 +495,16 @@ CFLAGS += -g endif # warn about C99 declaration after statement -CFLAGS += $(call check_gcc,-Wdeclaration-after-statement,) +CFLAGS += $(call cc-option,-Wdeclaration-after-statement,) + +include $(srctree)/arch/$(ARCH)/Makefile + +# Default kernel image to build when no specific target is given. +# KBUILD_IMAGE may be overruled on the commandline or +# set in the environment +# Also any assingments in arch/$(ARCH)/Makefiel take precedence over +# this default value +export KBUILD_IMAGE ?= vmlinux # # INSTALL_PATH specifies where to place the updated kernel and system map @@ -499,67 +545,93 @@ libs-y := $(libs-y1) $(libs-y2) # Build vmlinux # --------------------------------------------------------------------------- +# vmlinux is build from the objects selected by $(vmlinux-init) and +# $(vmlinux-main). Most are built-in.o files from top-level directories +# in the kernel tree, others are specified in arch/$(ARCH)Makefile. +# Ordering when linking is important, and $(vmlinux-init) must be first. +# +# vmlinux +# ^ +# | +# +-< $(vmlinux-init) +# | +--< init/version.o + more +# | +# +--< $(vmlinux-main) +# | +--< driver/built-in.o mm/built-in.o + more +# | +# +-< kallsyms.o (see description in CONFIG_KALLSYMS section) +# +# vmlinux version (uname -v) cannot be updated during normal +# descending-into-subdirs phase since we do not yet know if we need to +# update vmlinux. +# Therefore this step is delayed until just before final link of vmlinux - +# except in the kallsyms case where it is done just before adding the +# symbols to the kernel. +# +# System.map is generated to document addresses of all kernel symbols + +vmlinux-init := $(head-y) $(init-y) +vmlinux-main := $(core-y) $(libs-y) $(drivers-y) $(net-y) +vmlinux-all := $(vmlinux-init) $(vmlinux-main) +vmlinux-lds := arch/$(ARCH)/kernel/vmlinux.lds + +# Rule to link vmlinux - also used during CONFIG_KALLSYMS +# May be overridden by arch/$(ARCH)/Makefile +quiet_cmd_vmlinux__ ?= LD $@ + cmd_vmlinux__ ?= $(LD) $(LDFLAGS) $(LDFLAGS_vmlinux) -o $@ \ + -T $(vmlinux-lds) $(vmlinux-init) \ + --start-group $(vmlinux-main) --end-group \ + $(filter-out $(vmlinux-lds) $(vmlinux-init) $(vmlinux-main) FORCE ,$^) + +# Generate new vmlinux version +quiet_cmd_vmlinux_version = GEN .version + cmd_vmlinux_version = set -e; \ + . $(srctree)/scripts/mkversion > .tmp_version; \ + mv -f .tmp_version .version; \ + $(MAKE) $(build)=init + +# Generate System.map +quiet_cmd_sysmap = SYSMAP + cmd_sysmap = $(CONFIG_SHELL) $(srctree)/scripts/mksysmap + +# Link of vmlinux +# If CONFIG_KALLSYMS is set .version is already updated +# Generate System.map and verify that the content is consistent -# This is a bit tricky: If we need to relink vmlinux, we want -# the version number incremented, which means recompile init/version.o -# and relink init/init.o. However, we cannot do this during the -# normal descending-into-subdirs phase, since at that time -# we cannot yet know if we will need to relink vmlinux. -# So we descend into init/ inside the rule for vmlinux again. -head-y += $(HEAD) -vmlinux-objs := $(head-y) $(init-y) $(core-y) $(libs-y) $(drivers-y) $(net-y) - -quiet_cmd_vmlinux__ = LD $@ -define cmd_vmlinux__ - $(LD) $(LDFLAGS) $(LDFLAGS_vmlinux) $(head-y) $(init-y) \ - --start-group \ - $(core-y) \ - $(libs-y) \ - $(drivers-y) \ - $(net-y) \ - --end-group \ - $(filter .tmp_kallsyms%,$^) \ - -o $@ -endef +define rule_vmlinux__ + $(if $(CONFIG_KALLSYMS),,+$(call cmd,vmlinux_version)) -# set -e makes the rule exit immediately on error + $(call cmd,vmlinux__) + $(Q)echo 'cmd_$@ := $(cmd_vmlinux__)' > $(@D)/.$(@F).cmd -define rule_vmlinux__ - +set -e; \ - $(if $(filter .tmp_kallsyms%,$^),, \ - echo ' GEN .version'; \ - . $(srctree)/scripts/mkversion > .tmp_version; \ - mv -f .tmp_version .version; \ - $(MAKE) $(build)=init; \ - ) \ - $(if $($(quiet)cmd_vmlinux__), \ - echo ' $($(quiet)cmd_vmlinux__)' &&) \ - $(cmd_vmlinux__); \ - echo 'cmd_$@ := $(cmd_vmlinux__)' > $(@D)/.$(@F).cmd + $(Q)$(if $($(quiet)cmd_sysmap), \ + echo ' $($(quiet)cmd_sysmap) System.map' &&) \ + $(cmd_sysmap) $@ System.map; \ + if [ $$? -ne 0 ]; then \ + rm -f $@; \ + /bin/false; \ + fi; + $(verify_kallsyms) endef -do_system_map = $(NM) $(1) | grep -v '\(compiled\)\|\(\.o$$\)\|\( [aUw] \)\|\(\.\.ng$$\)\|\(LASH[RL]DI\)' | sort > $(2) - -LDFLAGS_vmlinux += -T arch/$(ARCH)/kernel/vmlinux.lds.s - -# Generate section listing all symbols and add it into vmlinux -# It's a three stage process: -# o .tmp_vmlinux1 has all symbols and sections, but __kallsyms is -# empty -# Running kallsyms on that gives us .tmp_kallsyms1.o with -# the right size -# o .tmp_vmlinux2 now has a __kallsyms section of the right size, -# but due to the added section, some addresses have shifted -# From here, we generate a correct .tmp_kallsyms2.o -# o The correct .tmp_kallsyms2.o is linked into the final vmlinux. -# o Verify that the System.map from vmlinux matches the map from -# .tmp_vmlinux2, just in case we did not generate kallsyms correctly. -# o If CONFIG_KALLSYMS_EXTRA_PASS is set, do an extra pass using -# .tmp_vmlinux3 and .tmp_kallsyms3.o. This is only meant as a -# temporary bypass to allow the kernel to be built while the -# maintainers work out what went wrong with kallsyms. ifdef CONFIG_KALLSYMS +# Generate section listing all symbols and add it into vmlinux $(kallsyms.o) +# It's a three stage process: +# o .tmp_vmlinux1 has all symbols and sections, but __kallsyms is +# empty +# Running kallsyms on that gives us .tmp_kallsyms1.o with +# the right size - vmlinux version (uname -v) is updated during this step +# o .tmp_vmlinux2 now has a __kallsyms section of the right size, +# but due to the added section, some addresses have shifted. +# From here, we generate a correct .tmp_kallsyms2.o +# o The correct .tmp_kallsyms2.o is linked into the final vmlinux. +# o Verify that the System.map from vmlinux matches the map from +# .tmp_vmlinux2, just in case we did not generate kallsyms correctly. +# o If CONFIG_KALLSYMS_EXTRA_PASS is set, do an extra pass using +# .tmp_vmlinux3 and .tmp_kallsyms3.o. This is only meant as a +# temporary bypass to allow the kernel to be built while the +# maintainers work out what went wrong with kallsyms. ifdef CONFIG_KALLSYMS_EXTRA_PASS last_kallsyms := 3 @@ -569,47 +641,58 @@ endif kallsyms.o := .tmp_kallsyms$(last_kallsyms).o -define rule_verify_kallsyms - @$(call do_system_map, .tmp_vmlinux$(last_kallsyms), .tmp_System.map) - @cmp -s System.map .tmp_System.map || \ - (echo Inconsistent kallsyms data, try setting CONFIG_KALLSYMS_EXTRA_PASS ; rm .tmp_kallsyms* ; false) +define verify_kallsyms + $(Q)$(if $($(quiet)cmd_sysmap), \ + echo ' $($(quiet)cmd_sysmap) .tmp_System.map' &&) \ + $(cmd_sysmap) .tmp_vmlinux$(last_kallsyms) .tmp_System.map + $(Q)cmp -s System.map .tmp_System.map || \ + (echo Inconsistent kallsyms data; \ + echo Try setting CONFIG_KALLSYMS_EXTRA_PASS; \ + rm .tmp_kallsyms* ; /bin/false ) endef +# Update vmlinux version before link +# Use + in front of this rule to silent warning about make -j1 +cmd_ksym_ld = $(cmd_vmlinux__) +define rule_ksym_ld + +$(call cmd,vmlinux_version) + $(call cmd,vmlinux__) + $(Q)echo 'cmd_$@ := $(cmd_vmlinux__)' > $(@D)/.$(@F).cmd +endef + +# Generate .S file with all kernel symbols quiet_cmd_kallsyms = KSYM $@ -cmd_kallsyms = $(NM) -n $< | $(KALLSYMS) $(foreach x,$(CONFIG_KALLSYMS_ALL),--all-symbols) > $@ + cmd_kallsyms = $(NM) -n $< | $(KALLSYMS) \ + $(if $(CONFIG_KALLSYMS_ALL),--all-symbols) > $@ .tmp_kallsyms1.o .tmp_kallsyms2.o .tmp_kallsyms3.o: %.o: %.S scripts FORCE $(call if_changed_dep,as_o_S) -.tmp_kallsyms%.S: .tmp_vmlinux% +.tmp_kallsyms%.S: .tmp_vmlinux% $(KALLSYMS) $(call cmd,kallsyms) -.tmp_vmlinux1: $(vmlinux-objs) arch/$(ARCH)/kernel/vmlinux.lds.s FORCE - $(call if_changed_rule,vmlinux__) - -.tmp_vmlinux2: $(vmlinux-objs) .tmp_kallsyms1.o arch/$(ARCH)/kernel/vmlinux.lds.s FORCE - $(call if_changed_rule,vmlinux__) - -.tmp_vmlinux3: $(vmlinux-objs) .tmp_kallsyms2.o arch/$(ARCH)/kernel/vmlinux.lds.s FORCE - $(call if_changed_rule,vmlinux__) +# .tmp_vmlinux1 must be complete except kallsyms, so update vmlinux version +.tmp_vmlinux1: $(vmlinux-lds) $(vmlinux-all) FORCE + $(call if_changed_rule,ksym_ld) -endif +.tmp_vmlinux2: $(vmlinux-lds) $(vmlinux-all) .tmp_kallsyms1.o FORCE + $(call if_changed,vmlinux__) -# Finally the vmlinux rule +.tmp_vmlinux3: $(vmlinux-lds) $(vmlinux-all) .tmp_kallsyms2.o FORCE + $(call if_changed,vmlinux__) -define rule_vmlinux - $(rule_vmlinux__); \ - $(call do_system_map, $@, System.map) - $(rule_verify_kallsyms) -endef +# Needs to visit scripts/ before $(KALLSYMS) can be used. +$(KALLSYMS): scripts ; -vmlinux: $(vmlinux-objs) $(kallsyms.o) arch/$(ARCH)/kernel/vmlinux.lds.s FORCE - $(call if_changed_rule,vmlinux) +endif # ifdef CONFIG_KALLSYMS -# The actual objects are generated when descending, -# make sure no implicit rule kicks in +# vmlinux image - including updated kernel symbols +vmlinux: $(vmlinux-lds) $(vmlinux-init) $(vmlinux-main) $(kallsyms.o) FORCE + $(call if_changed_rule,vmlinux__) -$(sort $(vmlinux-objs)) arch/$(ARCH)/kernel/vmlinux.lds.s: $(vmlinux-dirs) ; +# The actual objects are generated when descending, +# make sure no implicit rule kicks in +$(sort $(vmlinux-init) $(vmlinux-main)) $(vmlinux-lds): $(vmlinux-dirs) ; # Handle descending into subdirectories listed in $(vmlinux-dirs) # Preset locale variables to speed up the build process. Limit locale @@ -632,10 +715,10 @@ $(vmlinux-dirs): prepare-all scripts # using a seperate output directory. This allows convinient use # of make in output directory prepare2: - $(Q)if [ ! $(srctree) -ef $(objtree) ]; then \ - $(CONFIG_SHELL) $(srctree)/scripts/mkmakefile \ - $(srctree) $(objtree) $(VERSION) $(PATCHLEVEL) \ - > $(objtree)/Makefile; \ + $(Q)if /usr/bin/env test ! $(srctree) -ef $(objtree); then \ + $(CONFIG_SHELL) $(srctree)/scripts/mkmakefile \ + $(srctree) $(objtree) $(VERSION) $(PATCHLEVEL) \ + > $(objtree)/Makefile; \ fi # prepare1 is used to check if we are building in a separate output directory, @@ -667,7 +750,7 @@ prepare-all: prepare0 prepare # Leave this as default for preprocessing vmlinux.lds.S, which is now # done in arch/$(ARCH)/kernel/Makefile -export AFLAGS_vmlinux.lds.o += -P -C -U$(ARCH) +export CPPFLAGS_vmlinux.lds += -P -C -U$(ARCH) # Single targets # --------------------------------------------------------------------------- @@ -706,8 +789,8 @@ include/config/MARKER: include/linux/autoconf.h # Generate some files # --------------------------------------------------------------------------- -# version.h changes when $(KERNELRELEASE) etc change, as defined in -# this Makefile +# KERNELRELEASE can change from a few different places, meaning version.h +# needs to be updated, so this check is forced on all builds uts_len := 64 @@ -722,7 +805,7 @@ define filechk_version.h ) endef -include/linux/version.h: Makefile +include/linux/version.h: $(srctree)/Makefile FORCE $(call filechk,version.h) # --------------------------------------------------------------------------- @@ -922,7 +1005,13 @@ help: @echo ' rpm - Build a kernel as an RPM package' @echo ' tags/TAGS - Generate tags file for editors' @echo ' cscope - Generate cscope index' + @echo '' + @echo 'Static analysers' + @echo ' buildcheck - List dangling references to vmlinux discarded sections' + @echo ' and init sections from non-init sections' @echo ' checkstack - Generate a list of stack hogs' + @echo ' namespacecheck - Name space analysis on compiled kernel' + @echo '' @echo 'Kernel packaging:' @$(MAKE) -f $(package-dir)/Makefile help @echo '' @@ -940,7 +1029,8 @@ help: @echo ' make V=0|1 [targets] 0 => quiet build (default), 1 => verbose build' @echo ' make O=dir [targets] Locate all output files in "dir", including .config' - @echo ' make C=1 [targets] Check all c source with checker tool' + @echo ' make C=1 [targets] Check all c source with $$CHECK (sparse)' + @echo ' make C=2 [targets] Force check of all c source with $$CHECK (sparse)' @echo '' @echo 'Execute "make" or "make all" to build all targets marked with [*] ' @echo 'For further info see the ./README file' @@ -1081,8 +1171,11 @@ versioncheck: | xargs $(PERL) -w scripts/checkversion.pl buildcheck: - $(PERL) scripts/reference_discarded.pl - $(PERL) scripts/reference_init.pl + $(PERL) $(srctree)/scripts/reference_discarded.pl + $(PERL) $(srctree)/scripts/reference_init.pl + +namespacecheck: + $(PERL) $(srctree)/scripts/namespace.pl endif #ifeq ($(config-targets),1) endif #ifeq ($(mixed-targets),1) @@ -1119,13 +1212,22 @@ ifneq ($(cmd_files),) include $(cmd_files) endif +# Execute command and generate cmd file +if_changed = $(if $(strip $? \ + $(filter-out $(cmd_$(1)),$(cmd_$@))\ + $(filter-out $(cmd_$@),$(cmd_$(1)))),\ + @set -e; \ + $(if $($(quiet)cmd_$(1)),echo ' $(subst ','\'',$($(quiet)cmd_$(1)))';) \ + $(cmd_$(1)); \ + echo 'cmd_$@ := $(subst $$,$$$$,$(subst ','\'',$(cmd_$(1))))' > $(@D)/.$(@F).cmd) + + # execute the command and also postprocess generated .d dependencies # file - if_changed_dep = $(if $(strip $? $(filter-out FORCE $(wildcard $^),$^)\ $(filter-out $(cmd_$(1)),$(cmd_$@))\ $(filter-out $(cmd_$@),$(cmd_$(1)))),\ - @set -e; \ + $(Q)set -e; \ $(if $($(quiet)cmd_$(1)),echo ' $(subst ','\'',$($(quiet)cmd_$(1)))';) \ $(cmd_$(1)); \ scripts/basic/fixdep $(depfile) $@ '$(subst $$,$$$$,$(subst ','\'',$(cmd_$(1))))' > $(@D)/.$(@F).tmp; \ @@ -1139,7 +1241,7 @@ if_changed_dep = $(if $(strip $? $(filter-out FORCE $(wildcard $^),$^)\ if_changed_rule = $(if $(strip $? \ $(filter-out $(cmd_$(1)),$(cmd_$(@F)))\ $(filter-out $(cmd_$(@F)),$(cmd_$(1)))),\ - @$(rule_$(1))) + $(Q)$(rule_$(1))) # If quiet is set, only print short version of command