diff options
Diffstat (limited to 'Makefile')
| -rw-r--r-- | Makefile | 165 |
1 files changed, 108 insertions, 57 deletions
@@ -1,8 +1,8 @@ VERSION = 3 -PATCHLEVEL = 16 +PATCHLEVEL = 18 SUBLEVEL = 0 -EXTRAVERSION = -NAME = Shuffling Zombie Juror +EXTRAVERSION = -rc5 +NAME = Diseased Newt # *DOCUMENTATION* # To see a list of typical targets execute "make help" @@ -10,11 +10,9 @@ NAME = Shuffling Zombie Juror # Comments in this file are targeted only to the developer, do not # expect to learn how to build the kernel reading this file. -# Do not: -# o use make's built-in rules and variables -# (this increases performance and avoids hard-to-debug behaviour); -# o print "Entering directory ..."; -MAKEFLAGS += -rR --no-print-directory +# Do not use make's built-in rules and variables +# (this increases performance and avoids hard-to-debug behaviour); +MAKEFLAGS += -rR # Avoid funny character set dependencies unexport LC_ALL @@ -97,34 +95,6 @@ endif export quiet Q KBUILD_VERBOSE -# Call a source code checker (by default, "sparse") as part of the -# C compilation. -# -# Use 'make C=1' to enable checking of only re-compiled files. -# Use 'make C=2' to enable checking of *all* source files, regardless -# of whether they are re-compiled or not. -# -# See the file "Documentation/sparse.txt" for more details, including -# where to get the "sparse" utility. - -ifeq ("$(origin C)", "command line") - KBUILD_CHECKSRC = $(C) -endif -ifndef KBUILD_CHECKSRC - KBUILD_CHECKSRC = 0 -endif - -# Use make M=dir to specify directory of external module to build -# Old syntax make ... SUBDIRS=$PWD is still supported -# Setting the environment variable KBUILD_EXTMOD take precedence -ifdef SUBDIRS - KBUILD_EXTMOD ?= $(SUBDIRS) -endif - -ifeq ("$(origin M)", "command line") - KBUILD_EXTMOD := $(M) -endif - # kbuild supports saving output files in a separate directory. # To locate output files in a separate directory two syntaxes are supported. # In both cases the working directory must be the root of the kernel src. @@ -140,7 +110,6 @@ endif # The O= assignment takes precedence over the KBUILD_OUTPUT environment # variable. - # KBUILD_SRC is set on invocation of make in OBJ directory # KBUILD_SRC is not intended to be used by the regular user (for now) ifeq ($(KBUILD_SRC),) @@ -172,17 +141,9 @@ PHONY += $(MAKECMDGOALS) sub-make $(filter-out _all sub-make $(CURDIR)/Makefile, $(MAKECMDGOALS)) _all: sub-make @: -# Fake the "Entering directory" message once, so that IDEs/editors are -# able to understand relative filenames. - echodir := @echo - quiet_echodir := @echo -silent_echodir := @: sub-make: FORCE - $($(quiet)echodir) "make[1]: Entering directory \`$(KBUILD_OUTPUT)'" - $(if $(KBUILD_VERBOSE:1=),@)$(MAKE) -C $(KBUILD_OUTPUT) \ - KBUILD_SRC=$(CURDIR) \ - KBUILD_EXTMOD="$(KBUILD_EXTMOD)" -f $(CURDIR)/Makefile \ - $(filter-out _all sub-make,$(MAKECMDGOALS)) + $(Q)$(MAKE) -C $(KBUILD_OUTPUT) KBUILD_SRC=$(CURDIR) \ + -f $(CURDIR)/Makefile $(filter-out _all sub-make,$(MAKECMDGOALS)) # Leave processing to above invocation of make skip-makefile := 1 @@ -192,6 +153,39 @@ endif # ifeq ($(KBUILD_SRC),) # We process the rest of the Makefile if this is the final invocation of make ifeq ($(skip-makefile),) +# Do not print "Entering directory ...", +# but we want to display it when entering to the output directory +# so that IDEs/editors are able to understand relative filenames. +MAKEFLAGS += --no-print-directory + +# Call a source code checker (by default, "sparse") as part of the +# C compilation. +# +# Use 'make C=1' to enable checking of only re-compiled files. +# Use 'make C=2' to enable checking of *all* source files, regardless +# of whether they are re-compiled or not. +# +# See the file "Documentation/sparse.txt" for more details, including +# where to get the "sparse" utility. + +ifeq ("$(origin C)", "command line") + KBUILD_CHECKSRC = $(C) +endif +ifndef KBUILD_CHECKSRC + KBUILD_CHECKSRC = 0 +endif + +# Use make M=dir to specify directory of external module to build +# Old syntax make ... SUBDIRS=$PWD is still supported +# Setting the environment variable KBUILD_EXTMOD take precedence +ifdef SUBDIRS + KBUILD_EXTMOD ?= $(SUBDIRS) +endif + +ifeq ("$(origin M)", "command line") + KBUILD_EXTMOD := $(M) +endif + # If building an external module we do not care about the all: rule # but instead _all depend on modules PHONY += all @@ -303,7 +297,7 @@ CONFIG_SHELL := $(shell if [ -x "$$BASH" ]; then echo $$BASH; \ HOSTCC = gcc HOSTCXX = g++ -HOSTCFLAGS = -Wall -Wmissing-prototypes -Wstrict-prototypes -O2 -fomit-frame-pointer +HOSTCFLAGS = -Wall -Wmissing-prototypes -Wstrict-prototypes -O2 -fomit-frame-pointer -std=gnu89 HOSTCXXFLAGS = -O2 ifeq ($(shell $(HOSTCC) -v 2>&1 | grep -c "clang version"), 1) @@ -372,6 +366,7 @@ GENKSYMS = scripts/genksyms/genksyms INSTALLKERNEL := installkernel DEPMOD = /sbin/depmod PERL = perl +PYTHON = python CHECK = sparse CHECKFLAGS := -D__linux__ -Dlinux -D__STDC__ -Dunix -D__unix__ \ @@ -406,7 +401,8 @@ KBUILD_CPPFLAGS := -D__KERNEL__ KBUILD_CFLAGS := -Wall -Wundef -Wstrict-prototypes -Wno-trigraphs \ -fno-strict-aliasing -fno-common \ -Werror-implicit-function-declaration \ - -Wno-format-security + -Wno-format-security \ + -std=gnu89 KBUILD_AFLAGS_KERNEL := KBUILD_CFLAGS_KERNEL := @@ -422,7 +418,7 @@ KERNELVERSION = $(VERSION)$(if $(PATCHLEVEL),.$(PATCHLEVEL)$(if $(SUBLEVEL),.$(S export VERSION PATCHLEVEL SUBLEVEL KERNELRELEASE KERNELVERSION export ARCH SRCARCH CONFIG_SHELL HOSTCC HOSTCFLAGS CROSS_COMPILE AS LD CC export CPP AR NM STRIP OBJCOPY OBJDUMP -export MAKE AWK GENKSYMS INSTALLKERNEL PERL UTS_MACHINE +export MAKE AWK GENKSYMS INSTALLKERNEL PERL PYTHON UTS_MACHINE export HOSTCXX HOSTCXXFLAGS LDFLAGS_MODULE CHECK CHECKFLAGS export KBUILD_CPPFLAGS NOSTDINC_FLAGS LINUXINCLUDE OBJCOPYFLAGS LDFLAGS @@ -621,6 +617,9 @@ else KBUILD_CFLAGS += -O2 endif +# Tell gcc to never replace conditional load with a non-conditional one +KBUILD_CFLAGS += $(call cc-option,--param=allow-store-data-races=0) + ifdef CONFIG_READABLE_ASM # Disable optimizations that make assembler listings hard to read. # reorder blocks reorders the control in the function @@ -636,6 +635,22 @@ KBUILD_CFLAGS += $(call cc-option,-Wframe-larger-than=${CONFIG_FRAME_WARN}) endif # Handle stack protector mode. +# +# Since kbuild can potentially perform two passes (first with the old +# .config values and then with updated .config values), we cannot error out +# if a desired compiler option is unsupported. If we were to error, kbuild +# could never get to the second pass and actually notice that we changed +# the option to something that was supported. +# +# Additionally, we don't want to fallback and/or silently change which compiler +# flags will be used, since that leads to producing kernels with different +# security feature characteristics depending on the compiler used. ("But I +# selected CC_STACKPROTECTOR_STRONG! Why did it build with _REGULAR?!") +# +# The middle ground is to warn here so that the failed option is obvious, but +# to let the build fail with bad compiler flags so that we can't produce a +# kernel when there is a CONFIG and compiler mismatch. +# ifdef CONFIG_CC_STACKPROTECTOR_REGULAR stackp-flag := -fstack-protector ifeq ($(call cc-option, $(stackp-flag)),) @@ -668,6 +683,7 @@ KBUILD_CFLAGS += $(call cc-disable-warning, tautological-compare) # source of a reference will be _MergedGlobals and not on of the whitelisted names. # See modpost pattern 2 KBUILD_CFLAGS += $(call cc-option, -mno-global-merge,) +KBUILD_CFLAGS += $(call cc-option, -fcatch-undefined-behavior) else # This warning generated too much noise in a regular build. @@ -691,9 +707,16 @@ endif KBUILD_CFLAGS += $(call cc-option, -fno-var-tracking-assignments) ifdef CONFIG_DEBUG_INFO +ifdef CONFIG_DEBUG_INFO_SPLIT +KBUILD_CFLAGS += $(call cc-option, -gsplit-dwarf, -g) +else KBUILD_CFLAGS += -g +endif KBUILD_AFLAGS += -Wa,-gdwarf-2 endif +ifdef CONFIG_DEBUG_INFO_DWARF4 +KBUILD_CFLAGS += $(call cc-option, -gdwarf-4,) +endif ifdef CONFIG_DEBUG_INFO_REDUCED KBUILD_CFLAGS += $(call cc-option, -femit-struct-debug-baseonly) \ @@ -814,6 +837,21 @@ mod_strip_cmd = true endif # INSTALL_MOD_STRIP export mod_strip_cmd +# CONFIG_MODULE_COMPRESS, if defined, will cause module to be compressed +# after they are installed in agreement with CONFIG_MODULE_COMPRESS_GZIP +# or CONFIG_MODULE_COMPRESS_XZ. + +mod_compress_cmd = true +ifdef CONFIG_MODULE_COMPRESS + ifdef CONFIG_MODULE_COMPRESS_GZIP + mod_compress_cmd = gzip -n + endif # CONFIG_MODULE_COMPRESS_GZIP + ifdef CONFIG_MODULE_COMPRESS_XZ + mod_compress_cmd = xz + endif # CONFIG_MODULE_COMPRESS_XZ +endif # CONFIG_MODULE_COMPRESS +export mod_compress_cmd + # Select initial ramdisk compression format, default is gzip(1). # This shall be used by the dracut(8) tool while creating an initramfs image. # @@ -846,9 +884,7 @@ vmlinux-dirs := $(patsubst %/,%,$(filter %/, $(init-y) $(init-m) \ $(net-y) $(net-m) $(libs-y) $(libs-m))) vmlinux-alldirs := $(sort $(vmlinux-dirs) $(patsubst %/,%,$(filter %/, \ - $(init-n) $(init-) \ - $(core-n) $(core-) $(drivers-n) $(drivers-) \ - $(net-n) $(net-) $(libs-n) $(libs-)))) + $(init-) $(core-) $(drivers-) $(net-) $(libs-)))) init-y := $(patsubst %/, %/built-in.o, $(init-y)) core-y := $(patsubst %/, %/built-in.o, $(core-y)) @@ -1036,6 +1072,13 @@ headers_check: headers_install $(Q)$(MAKE) $(hdr-inst)=arch/$(hdr-arch)/include/uapi/asm $(hdr-dst) HDRCHECK=1 # --------------------------------------------------------------------------- +# Kernel selftest + +PHONY += kselftest +kselftest: + $(Q)$(MAKE) -C tools/testing/selftests run_tests + +# --------------------------------------------------------------------------- # Modules ifdef CONFIG_MODULES @@ -1222,9 +1265,9 @@ help: @echo ' tags/TAGS - Generate tags file for editors' @echo ' cscope - Generate cscope index' @echo ' gtags - Generate GNU GLOBAL index' - @echo ' kernelrelease - Output the release version string' - @echo ' kernelversion - Output the version stored in Makefile' - @echo ' image_name - Output the image name' + @echo ' kernelrelease - Output the release version string (use with make -s)' + @echo ' kernelversion - Output the version stored in Makefile (use with make -s)' + @echo ' image_name - Output the image name (use with make -s)' @echo ' headers_install - Install sanitised kernel headers to INSTALL_HDR_PATH'; \ echo ' (default: $(INSTALL_HDR_PATH))'; \ echo '' @@ -1238,6 +1281,11 @@ help: @echo ' headerdep - Detect inclusion cycles in headers' @$(MAKE) -f $(srctree)/scripts/Makefile.help checker-help @echo '' + @echo 'Kernel selftest' + @echo ' kselftest - Build and run kernel selftest (run as root)' + @echo ' Build, install, and boot kernel before' + @echo ' running kselftest on it' + @echo '' @echo 'Kernel packaging:' @$(MAKE) $(build)=$(package-dir) help @echo '' @@ -1379,6 +1427,7 @@ clean: $(clean-dirs) @find $(if $(KBUILD_EXTMOD), $(KBUILD_EXTMOD), .) $(RCS_FIND_IGNORE) \ \( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \ -o -name '*.ko.*' \ + -o -name '*.dwo' \ -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \ -o -name '*.symtypes' -o -name 'modules.order' \ -o -name modules.builtin -o -name '.tmp_*.o.*' \ @@ -1491,6 +1540,8 @@ endif $(cmd_crmodverdir) $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \ $(build)=$(build-dir) +# Make sure the latest headers are built for Documentation +Documentation/: headers_install %/: prepare scripts FORCE $(cmd_crmodverdir) $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \ @@ -1533,7 +1584,7 @@ endif # Shorthand for $(Q)$(MAKE) -f scripts/Makefile.clean obj=dir # Usage: # $(Q)$(MAKE) $(clean)=dir -clean := -f $(if $(KBUILD_SRC),$(srctree)/)scripts/Makefile.clean obj +clean := -f $(srctree)/scripts/Makefile.clean obj endif # skip-makefile |