X-Git-Url: https://git.proxmox.com/?a=blobdiff_plain;f=Makefile;h=a80e02d9ad1b5ee81b928bf9f020ee3f9ad65f22;hb=19de0f851cb519668af95a4addfa22a499ca47dd;hp=fe725b4f82cb14a4b8e452f7bde28e12df0fc1a6;hpb=21e1d40e01f0bcd45a4cea772f8add359aeae301;p=mirror_ubuntu-bionic-kernel.git diff --git a/Makefile b/Makefile index fe725b4f82cb..a80e02d9ad1b 100644 --- a/Makefile +++ b/Makefile @@ -238,10 +238,12 @@ no-dot-config-targets := clean mrproper distclean \ cscope gtags TAGS tags help% %docs check% coccicheck \ $(version_h) headers_% archheaders archscripts \ kernelversion %src-pkg +no-sync-config-targets := $(no-dot-config-targets) install %install -config-targets := 0 -mixed-targets := 0 -dot-config := 1 +config-targets := 0 +mixed-targets := 0 +dot-config := 1 +may-sync-config := 1 ifneq ($(filter $(no-dot-config-targets), $(MAKECMDGOALS)),) ifeq ($(filter-out $(no-dot-config-targets), $(MAKECMDGOALS)),) @@ -249,6 +251,16 @@ ifneq ($(filter $(no-dot-config-targets), $(MAKECMDGOALS)),) endif endif +ifneq ($(filter $(no-sync-config-targets), $(MAKECMDGOALS)),) + ifeq ($(filter-out $(no-sync-config-targets), $(MAKECMDGOALS)),) + may-sync-config := 0 + endif +endif + +ifneq ($(KBUILD_EXTMOD),) + may-sync-config := 0 +endif + ifeq ($(KBUILD_EXTMOD),) ifneq ($(filter config %config,$(MAKECMDGOALS)),) config-targets := 1 @@ -291,19 +303,7 @@ KERNELRELEASE = $(shell cat include/config/kernel.release 2> /dev/null) KERNELVERSION = $(VERSION)$(if $(PATCHLEVEL),.$(PATCHLEVEL)$(if $(SUBLEVEL),.$(SUBLEVEL)))$(EXTRAVERSION) export VERSION PATCHLEVEL SUBLEVEL KERNELRELEASE KERNELVERSION -# 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 -# line overrides the setting of ARCH below. If a native build is happening, -# then ARCH is assigned, getting whatever value it gets normally, and -# SUBARCH is subsequently ignored. - -SUBARCH := $(shell uname -m | sed -e s/i.86/x86/ -e s/x86_64/x86/ \ - -e s/sun4u/sparc64/ \ - -e s/arm.*/arm/ -e s/sa110/arm/ \ - -e s/s390x/s390/ -e s/parisc64/parisc/ \ - -e s/ppc.*/powerpc/ -e s/mips.*/mips/ \ - -e s/sh[234].*/sh/ -e s/aarch64.*/arm64/ \ - -e s/riscv.*/riscv/) +include scripts/subarch.include # Cross compiling and selecting different set of gcc/bin-utils # --------------------------------------------------------------------------- @@ -504,20 +504,28 @@ endif ifeq ($(cc-name),clang) ifneq ($(CROSS_COMPILE),) -CLANG_TARGET := --target=$(notdir $(CROSS_COMPILE:%-=%)) -GCC_TOOLCHAIN := $(realpath $(dir $(shell which $(LD)))/..) +CLANG_FLAGS := --target=$(notdir $(CROSS_COMPILE:%-=%)) +GCC_TOOLCHAIN_DIR := $(dir $(shell which $(CROSS_COMPILE)elfedit)) +CLANG_FLAGS += --prefix=$(GCC_TOOLCHAIN_DIR) +GCC_TOOLCHAIN := $(realpath $(GCC_TOOLCHAIN_DIR)/..) endif ifneq ($(GCC_TOOLCHAIN),) -CLANG_GCC_TC := --gcc-toolchain=$(GCC_TOOLCHAIN) +CLANG_FLAGS += --gcc-toolchain=$(GCC_TOOLCHAIN) endif -KBUILD_CFLAGS += $(CLANG_TARGET) $(CLANG_GCC_TC) -KBUILD_AFLAGS += $(CLANG_TARGET) $(CLANG_GCC_TC) +CLANG_FLAGS += -no-integrated-as +KBUILD_CFLAGS += $(CLANG_FLAGS) +KBUILD_AFLAGS += $(CLANG_FLAGS) +export CLANG_FLAGS endif RETPOLINE_CFLAGS_GCC := -mindirect-branch=thunk-extern -mindirect-branch-register +RETPOLINE_VDSO_CFLAGS_GCC := -mindirect-branch=thunk-inline -mindirect-branch-register RETPOLINE_CFLAGS_CLANG := -mretpoline-external-thunk +RETPOLINE_VDSO_CFLAGS_CLANG := -mretpoline RETPOLINE_CFLAGS := $(call cc-option,$(RETPOLINE_CFLAGS_GCC),$(call cc-option,$(RETPOLINE_CFLAGS_CLANG))) +RETPOLINE_VDSO_CFLAGS := $(call cc-option,$(RETPOLINE_VDSO_CFLAGS_GCC),$(call cc-option,$(RETPOLINE_VDSO_CFLAGS_CLANG))) export RETPOLINE_CFLAGS +export RETPOLINE_VDSO_CFLAGS ifeq ($(config-targets),1) # =========================================================================== @@ -601,23 +609,27 @@ ifeq ($(dot-config),1) # Read in config -include include/config/auto.conf -ifeq ($(KBUILD_EXTMOD),) +ifeq ($(may-sync-config),1) # Read in dependencies to all Kconfig* files, make sure to run # oldconfig if changes are detected. -include include/config/auto.conf.cmd # To avoid any implicit rule to kick in, define an empty command -$(KCONFIG_CONFIG) include/config/auto.conf.cmd: ; +$(KCONFIG_CONFIG): ; # If .config is newer than include/config/auto.conf, someone tinkered # with it and forgot to run make oldconfig. # if auto.conf.cmd is missing then we are probably in a cleaned tree so # we execute the config step to be sure to catch updated Kconfig files -include/config/%.conf: $(KCONFIG_CONFIG) include/config/auto.conf.cmd +# +# This exploits the 'multi-target pattern rule' trick. +# The syncconfig should be executed only once to make all the targets. +%/auto.conf %/auto.conf.cmd %/tristate.conf: $(KCONFIG_CONFIG) $(Q)$(MAKE) -f $(srctree)/Makefile silentoldconfig else -# external modules needs include/generated/autoconf.h and include/config/auto.conf -# but do not care if they are up-to-date. Use auto.conf to trigger the test +# External modules and some install targets need include/generated/autoconf.h +# and include/config/auto.conf but do not care if they are up-to-date. +# Use auto.conf to trigger the test PHONY += include/config/auto.conf include/config/auto.conf: @@ -629,7 +641,7 @@ include/config/auto.conf: echo >&2 ; \ /bin/false) -endif # KBUILD_EXTMOD +endif # may-sync-config else # Dummy target needed, because used as prerequisite @@ -669,8 +681,7 @@ KBUILD_CFLAGS += $(call cc-disable-warning, int-in-bool-context) KBUILD_CFLAGS += $(call cc-disable-warning, attribute-alias) ifdef CONFIG_CC_OPTIMIZE_FOR_SIZE -KBUILD_CFLAGS += $(call cc-option,-Oz,-Os) -KBUILD_CFLAGS += $(call cc-disable-warning,maybe-uninitialized,) +KBUILD_CFLAGS += -Os $(call cc-disable-warning,maybe-uninitialized,) else ifdef CONFIG_PROFILE_ALL_BRANCHES KBUILD_CFLAGS += -O2 $(call cc-disable-warning,maybe-uninitialized,) @@ -742,8 +753,6 @@ KBUILD_CFLAGS += $(call cc-disable-warning, tautological-compare) # See modpost pattern 2 KBUILD_CFLAGS += $(call cc-option, -mno-global-merge,) KBUILD_CFLAGS += $(call cc-option, -fcatch-undefined-behavior) -KBUILD_CFLAGS += $(call cc-option, -no-integrated-as) -KBUILD_AFLAGS += $(call cc-option, -no-integrated-as) else # These warnings generated too much noise in a regular build. @@ -822,6 +831,9 @@ KBUILD_CFLAGS += $(call cc-option,-Wdeclaration-after-statement,) # disable pointer signed / unsigned warnings in gcc 4.0 KBUILD_CFLAGS += $(call cc-disable-warning, pointer-sign) +# disable stringop warnings in gcc 8+ +KBUILD_CFLAGS += $(call cc-disable-warning, stringop-truncation) + # disable invalid "can't wrap" optimizations for signed / pointers KBUILD_CFLAGS += $(call cc-option,-fno-strict-overflow) @@ -964,17 +976,14 @@ mod_sign_cmd = true endif export mod_sign_cmd +HOST_LIBELF_LIBS = $(shell pkg-config libelf --libs 2>/dev/null || echo -lelf) + ifdef CONFIG_STACK_VALIDATION has_libelf := $(call try-run,\ - echo "int main() {}" | $(HOSTCC) -xc -o /dev/null -lelf -,1,0) + echo "int main() {}" | $(HOSTCC) -xc -o /dev/null $(HOST_LIBELF_LIBS) -,1,0) ifeq ($(has_libelf),1) objtool_target := tools/objtool FORCE else - ifdef CONFIG_UNWINDER_ORC - $(error "Cannot generate ORC metadata for CONFIG_UNWINDER_ORC=y, please install libelf-dev, libelf-devel or elfutils-libelf-devel") - else - $(warning "Cannot use CONFIG_STACK_VALIDATION=y, please install libelf-dev, libelf-devel or elfutils-libelf-devel") - endif SKIP_STACK_VALIDATION := 1 export SKIP_STACK_VALIDATION endif @@ -1118,6 +1127,14 @@ uapi-asm-generic: PHONY += prepare-objtool prepare-objtool: $(objtool_target) +ifeq ($(SKIP_STACK_VALIDATION),1) +ifdef CONFIG_UNWINDER_ORC + @echo "error: Cannot generate ORC metadata for CONFIG_UNWINDER_ORC=y, please install libelf-dev, libelf-devel or elfutils-libelf-devel" >&2 + @false +else + @echo "warning: Cannot use CONFIG_STACK_VALIDATION=y, please install libelf-dev, libelf-devel or elfutils-libelf-devel" >&2 +endif +endif # Check for CONFIG flags that require compiler support. Abort the build # after .config has been processed, but before the kernel build starts.