diff options
Diffstat (limited to 'Makefile')
| -rw-r--r-- | Makefile | 94 |
1 files changed, 70 insertions, 24 deletions
@@ -497,7 +497,7 @@ KBUILD_AFLAGS := -D__ASSEMBLY__ -fno-PIE KBUILD_CFLAGS := -Wall -Wundef -Werror=strict-prototypes -Wno-trigraphs \ -fno-strict-aliasing -fno-common -fshort-wchar -fno-PIE \ -Werror=implicit-function-declaration -Werror=implicit-int \ - -Wno-format-security \ + -Werror=return-type -Wno-format-security \ -std=gnu89 KBUILD_CPPFLAGS := -D__KERNEL__ KBUILD_AFLAGS_KERNEL := @@ -505,7 +505,6 @@ KBUILD_CFLAGS_KERNEL := KBUILD_AFLAGS_MODULE := -DMODULE KBUILD_CFLAGS_MODULE := -DMODULE KBUILD_LDFLAGS_MODULE := -export KBUILD_LDS_MODULE := $(srctree)/scripts/module-common.lds KBUILD_LDFLAGS := CLANG_FLAGS := @@ -517,7 +516,6 @@ export KBUILD_HOSTCXXFLAGS KBUILD_HOSTLDFLAGS KBUILD_HOSTLDLIBS LDFLAGS_MODULE export KBUILD_CPPFLAGS NOSTDINC_FLAGS LINUXINCLUDE OBJCOPYFLAGS KBUILD_LDFLAGS export KBUILD_CFLAGS CFLAGS_KERNEL CFLAGS_MODULE -export CFLAGS_KASAN CFLAGS_KASAN_NOSANITIZE CFLAGS_UBSAN CFLAGS_KCSAN export KBUILD_AFLAGS AFLAGS_KERNEL AFLAGS_MODULE export KBUILD_AFLAGS_MODULE KBUILD_CFLAGS_MODULE KBUILD_LDFLAGS_MODULE export KBUILD_AFLAGS_KERNEL KBUILD_CFLAGS_KERNEL @@ -634,7 +632,7 @@ endif # in addition to whatever we do anyway. # Just "make" or "make all" shall build modules as well -ifneq ($(filter all modules nsdeps,$(MAKECMDGOALS)),) +ifneq ($(filter all modules nsdeps %compile_commands.json clang-%,$(MAKECMDGOALS)),) KBUILD_MODULES := 1 endif @@ -707,8 +705,11 @@ $(KCONFIG_CONFIG): # This exploits the 'multi-target pattern rule' trick. # The syncconfig should be executed only once to make all the targets. # (Note: use the grouped target '&:' when we bump to GNU Make 4.3) +quiet_cmd_syncconfig = SYNC $@ + cmd_syncconfig = $(MAKE) -f $(srctree)/Makefile syncconfig + %/config/auto.conf %/config/auto.conf.cmd %/generated/autoconf.h: $(KCONFIG_CONFIG) - $(Q)$(MAKE) -f $(srctree)/Makefile syncconfig + +$(call cmd,syncconfig) else # !may-sync-config # 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. @@ -813,16 +814,22 @@ KBUILD_CFLAGS += -ftrivial-auto-var-init=zero KBUILD_CFLAGS += -enable-trivial-auto-var-init-zero-knowing-it-will-be-removed-from-clang endif -DEBUG_CFLAGS := $(call cc-option, -fno-var-tracking-assignments) +# Workaround for GCC versions < 5.0 +# https://gcc.gnu.org/bugzilla/show_bug.cgi?id=61801 +ifdef CONFIG_CC_IS_GCC +DEBUG_CFLAGS := $(call cc-ifversion, -lt, 0500, $(call cc-option, -fno-var-tracking-assignments)) +endif ifdef CONFIG_DEBUG_INFO + ifdef CONFIG_DEBUG_INFO_SPLIT DEBUG_CFLAGS += -gsplit-dwarf else DEBUG_CFLAGS += -g endif + KBUILD_AFLAGS += -Wa,-gdwarf-2 -endif + ifdef CONFIG_DEBUG_INFO_DWARF4 DEBUG_CFLAGS += -gdwarf-4 endif @@ -838,6 +845,8 @@ KBUILD_AFLAGS += -gz=zlib KBUILD_LDFLAGS += --compress-debug-sections=zlib endif +endif # CONFIG_DEBUG_INFO + KBUILD_CFLAGS += $(DEBUG_CFLAGS) export DEBUG_CFLAGS @@ -919,16 +928,16 @@ KBUILD_CFLAGS += $(call cc-disable-warning, restrict) KBUILD_CFLAGS += $(call cc-disable-warning, maybe-uninitialized) # disable invalid "can't wrap" optimizations for signed / pointers -KBUILD_CFLAGS += $(call cc-option,-fno-strict-overflow) +KBUILD_CFLAGS += -fno-strict-overflow # Make sure -fstack-check isn't enabled (like gentoo apparently did) -KBUILD_CFLAGS += $(call cc-option,-fno-stack-check,) +KBUILD_CFLAGS += -fno-stack-check # conserve stack if available KBUILD_CFLAGS += $(call cc-option,-fconserve-stack) # Prohibit date/time macros, which would make the build non-deterministic -KBUILD_CFLAGS += $(call cc-option,-Werror=date-time) +KBUILD_CFLAGS += -Werror=date-time # enforce correct pointer usage KBUILD_CFLAGS += $(call cc-option,-Werror=incompatible-pointer-types) @@ -964,8 +973,8 @@ KBUILD_CPPFLAGS += $(KCPPFLAGS) KBUILD_AFLAGS += $(KAFLAGS) KBUILD_CFLAGS += $(KCFLAGS) -KBUILD_LDFLAGS_MODULE += --build-id -LDFLAGS_vmlinux += --build-id +KBUILD_LDFLAGS_MODULE += --build-id=sha1 +LDFLAGS_vmlinux += --build-id=sha1 ifeq ($(CONFIG_STRIP_ASM_SYMS),y) LDFLAGS_vmlinux += $(call ld-option, -X,) @@ -1377,7 +1386,7 @@ endif # using awk while concatenating to the final file. PHONY += modules -modules: $(if $(KBUILD_BUILTIN),vmlinux) modules_check +modules: $(if $(KBUILD_BUILTIN),vmlinux) modules_check modules_prepare $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost PHONY += modules_check @@ -1394,6 +1403,7 @@ targets += modules.order # Target to prepare building external modules PHONY += modules_prepare modules_prepare: prepare + $(Q)$(MAKE) $(build)=scripts scripts/module.lds # Target to install modules PHONY += modules_install @@ -1452,7 +1462,8 @@ endif # CONFIG_MODULES # Directories & files removed with 'make clean' CLEAN_FILES += include/ksym vmlinux.symvers \ - modules.builtin modules.builtin.modinfo modules.nsdeps + modules.builtin modules.builtin.modinfo modules.nsdeps \ + compile_commands.json # Directories & files removed with 'make mrproper' MRPROPER_FILES += include/config include/generated \ @@ -1558,12 +1569,13 @@ help: echo '' @echo 'Static analysers:' @echo ' checkstack - Generate a list of stack hogs' - @echo ' namespacecheck - Name space analysis on compiled kernel' @echo ' versioncheck - Sanity check on version.h usage' @echo ' includecheck - Check for duplicate included header files' @echo ' export_report - List the usages of all exported symbols' @echo ' headerdep - Detect inclusion cycles in headers' @echo ' coccicheck - Check with Coccinelle' + @echo ' clang-analyzer - Check with clang static analyzer' + @echo ' clang-tidy - Check with clang-tidy' @echo '' @echo 'Tools:' @echo ' nsdeps - Generate missing symbol namespace dependencies' @@ -1681,14 +1693,18 @@ else # KBUILD_EXTMOD # Install the modules built in the module directory # Assumes install directory is already created -# We are always building modules +# We are always building only modules. +KBUILD_BUILTIN := KBUILD_MODULES := 1 build-dirs := $(KBUILD_EXTMOD) PHONY += modules -modules: descend +modules: $(MODORDER) $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost +$(MODORDER): descend + @: + PHONY += modules_install modules_install: _emodinst_ _emodinst_post @@ -1702,8 +1718,12 @@ PHONY += _emodinst_post _emodinst_post: _emodinst_ $(call cmd,depmod) +compile_commands.json: $(extmod-prefix)compile_commands.json +PHONY += compile_commands.json + clean-dirs := $(KBUILD_EXTMOD) -clean: rm-files := $(KBUILD_EXTMOD)/Module.symvers $(KBUILD_EXTMOD)/modules.nsdeps +clean: rm-files := $(KBUILD_EXTMOD)/Module.symvers $(KBUILD_EXTMOD)/modules.nsdeps \ + $(KBUILD_EXTMOD)/compile_commands.json PHONY += help help: @@ -1715,7 +1735,9 @@ help: @echo ' clean - remove generated files in module directory only' @echo '' -PHONY += prepare +# no-op for external module builds +PHONY += prepare modules_prepare + endif # KBUILD_EXTMOD # Single targets @@ -1748,7 +1770,7 @@ MODORDER := .modules.tmp endif PHONY += single_modpost -single_modpost: $(single-no-ko) +single_modpost: $(single-no-ko) modules_prepare $(Q){ $(foreach m, $(single-ko), echo $(extmod-prefix)$m;) } > $(MODORDER) $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost @@ -1816,10 +1838,37 @@ nsdeps: export KBUILD_NSDEPS=1 nsdeps: modules $(Q)$(CONFIG_SHELL) $(srctree)/scripts/nsdeps +# Clang Tooling +# --------------------------------------------------------------------------- + +quiet_cmd_gen_compile_commands = GEN $@ + cmd_gen_compile_commands = $(PYTHON3) $< -a $(AR) -o $@ $(filter-out $<, $(real-prereqs)) + +$(extmod-prefix)compile_commands.json: scripts/clang-tools/gen_compile_commands.py \ + $(if $(KBUILD_EXTMOD),,$(KBUILD_VMLINUX_OBJS) $(KBUILD_VMLINUX_LIBS)) \ + $(if $(CONFIG_MODULES), $(MODORDER)) FORCE + $(call if_changed,gen_compile_commands) + +targets += $(extmod-prefix)compile_commands.json + +PHONY += clang-tidy clang-analyzer + +ifdef CONFIG_CC_IS_CLANG +quiet_cmd_clang_tools = CHECK $< + cmd_clang_tools = $(PYTHON3) $(srctree)/scripts/clang-tools/run-clang-tools.py $@ $< + +clang-tidy clang-analyzer: $(extmod-prefix)compile_commands.json + $(call cmd,clang_tools) +else +clang-tidy clang-analyzer: + @echo "$@ requires CC=clang" >&2 + @false +endif + # Scripts to check various things for consistency # --------------------------------------------------------------------------- -PHONY += includecheck versioncheck coccicheck namespacecheck export_report +PHONY += includecheck versioncheck coccicheck export_report includecheck: find $(srctree)/* $(RCS_FIND_IGNORE) \ @@ -1834,9 +1883,6 @@ versioncheck: coccicheck: $(Q)$(BASH) $(srctree)/scripts/$@ -namespacecheck: - $(PERL) $(srctree)/scripts/namespace.pl - export_report: $(PERL) $(srctree)/scripts/export_report.pl |