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-rw-r--r--Makefile69
1 files changed, 49 insertions, 20 deletions
diff --git a/Makefile b/Makefile
index 94449eb8a..6a556f3d0 100644
--- a/Makefile
+++ b/Makefile
@@ -1,8 +1,8 @@
VERSION = 4
-PATCHLEVEL = 6
-SUBLEVEL = 5
+PATCHLEVEL = 7
+SUBLEVEL = 1
EXTRAVERSION = -gnu
-NAME = Charred Weasel
+NAME = Psychotic Stoned Sheep
# *DOCUMENTATION*
# To see a list of typical targets execute "make help"
@@ -128,6 +128,10 @@ _all:
# Cancel implicit rules on top Makefile
$(CURDIR)/Makefile Makefile: ;
+ifneq ($(words $(subst :, ,$(CURDIR))), 1)
+ $(error main directory cannot contain spaces nor colons)
+endif
+
ifneq ($(KBUILD_OUTPUT),)
# Invoke a second make in the output directory, passing relevant variables
# check that the output directory actually exists
@@ -142,7 +146,7 @@ PHONY += $(MAKECMDGOALS) sub-make
$(filter-out _all sub-make $(CURDIR)/Makefile, $(MAKECMDGOALS)) _all: sub-make
@:
-sub-make: FORCE
+sub-make:
$(Q)$(MAKE) -C $(KBUILD_OUTPUT) KBUILD_SRC=$(CURDIR) \
-f $(CURDIR)/Makefile $(filter-out _all sub-make,$(MAKECMDGOALS))
@@ -359,12 +363,14 @@ CHECK = sparse
CHECKFLAGS := -D__linux__ -Dlinux -D__STDC__ -Dunix -D__unix__ \
-Wbitwise -Wno-return-void $(CF)
+NOSTDINC_FLAGS =
CFLAGS_MODULE =
AFLAGS_MODULE =
LDFLAGS_MODULE =
CFLAGS_KERNEL =
AFLAGS_KERNEL =
-CFLAGS_GCOV = -fprofile-arcs -ftest-coverage -fno-tree-loop-im
+LDFLAGS_vmlinux =
+CFLAGS_GCOV = -fprofile-arcs -ftest-coverage -fno-tree-loop-im -Wno-maybe-uninitialized
CFLAGS_KCOV = -fsanitize-coverage=trace-pc
@@ -619,7 +625,11 @@ KBUILD_CFLAGS += -Os $(call cc-disable-warning,maybe-uninitialized,)
else ifdef CONFIG_CC_OPTIMIZE_HARDER
KBUILD_CFLAGS += -O3 $(call cc-disable-warning,maybe-uninitialized,)
else
-KBUILD_CFLAGS += -O2
+ifdef CONFIG_PROFILE_ALL_BRANCHES
+KBUILD_CFLAGS += -O2 $(call cc-disable-warning,maybe-uninitialized,)
+else
+KBUILD_CFLAGS += -O2
+endif
endif
# Tell gcc to never replace conditional load with a non-conditional one
@@ -929,27 +939,41 @@ export KBUILD_ALLDIRS := $(sort $(filter-out arch/%,$(vmlinux-alldirs)) arch Doc
vmlinux-deps := $(KBUILD_LDS) $(KBUILD_VMLINUX_INIT) $(KBUILD_VMLINUX_MAIN)
-# Final link of vmlinux
- cmd_link-vmlinux = $(CONFIG_SHELL) $< $(LD) $(LDFLAGS) $(LDFLAGS_vmlinux)
-quiet_cmd_link-vmlinux = LINK $@
-
-# Include targets which we want to
-# execute if the rest of the kernel build went well.
-vmlinux: scripts/link-vmlinux.sh $(vmlinux-deps) FORCE
+# Include targets which we want to execute sequentially if the rest of the
+# kernel build went well. If CONFIG_TRIM_UNUSED_KSYMS is set, this might be
+# evaluated more than once.
+PHONY += vmlinux_prereq
+vmlinux_prereq: $(vmlinux-deps) FORCE
ifdef CONFIG_HEADERS_CHECK
$(Q)$(MAKE) -f $(srctree)/Makefile headers_check
endif
-ifdef CONFIG_SAMPLES
- $(Q)$(MAKE) $(build)=samples
-endif
ifdef CONFIG_BUILD_DOCSRC
$(Q)$(MAKE) $(build)=Documentation
endif
ifdef CONFIG_GDB_SCRIPTS
$(Q)ln -fsn `cd $(srctree) && /bin/pwd`/scripts/gdb/vmlinux-gdb.py
endif
+ifdef CONFIG_TRIM_UNUSED_KSYMS
+ $(Q)$(CONFIG_SHELL) $(srctree)/scripts/adjust_autoksyms.sh \
+ "$(MAKE) KBUILD_MODULES=1 -f $(srctree)/Makefile vmlinux_prereq"
+endif
+
+# standalone target for easier testing
+include/generated/autoksyms.h: FORCE
+ $(Q)$(CONFIG_SHELL) $(srctree)/scripts/adjust_autoksyms.sh true
+
+# Final link of vmlinux
+ cmd_link-vmlinux = $(CONFIG_SHELL) $< $(LD) $(LDFLAGS) $(LDFLAGS_vmlinux)
+quiet_cmd_link-vmlinux = LINK $@
+
+vmlinux: scripts/link-vmlinux.sh vmlinux_prereq $(vmlinux-deps) FORCE
+$(call if_changed,link-vmlinux)
+# Build samples along the rest of the kernel
+ifdef CONFIG_SAMPLES
+vmlinux-dirs += samples
+endif
+
# The actual objects are generated when descending,
# make sure no implicit rule kicks in
$(sort $(vmlinux-deps)): $(vmlinux-dirs) ;
@@ -1001,10 +1025,12 @@ prepare2: prepare3 outputmakefile asm-generic
prepare1: prepare2 $(version_h) include/generated/utsrelease.h \
include/config/auto.conf
$(cmd_crmodverdir)
+ $(Q)test -e include/generated/autoksyms.h || \
+ touch include/generated/autoksyms.h
archprepare: archheaders archscripts prepare1 scripts_basic
-prepare0: archprepare FORCE
+prepare0: archprepare
$(Q)$(MAKE) $(build)=.
# All the preparing..
@@ -1064,7 +1090,7 @@ INSTALL_FW_PATH=$(INSTALL_MOD_PATH)/lib/firmware
export INSTALL_FW_PATH
PHONY += firmware_install
-firmware_install: FORCE
+firmware_install:
@mkdir -p $(objtree)/firmware
$(Q)$(MAKE) -f $(srctree)/scripts/Makefile.fwinst obj=firmware __fw_install
@@ -1084,7 +1110,7 @@ PHONY += archscripts
archscripts:
PHONY += __headers
-__headers: $(version_h) scripts_basic asm-generic archheaders archscripts FORCE
+__headers: $(version_h) scripts_basic asm-generic archheaders archscripts
$(Q)$(MAKE) $(build)=scripts build_unifdef
PHONY += headers_install_all
@@ -1195,7 +1221,8 @@ else # CONFIG_MODULES
# Modules not configured
# ---------------------------------------------------------------------------
-modules modules_install: FORCE
+PHONY += modules modules_install
+modules modules_install:
@echo >&2
@echo >&2 "The present kernel configuration has modules disabled."
@echo >&2 "Type 'make config' and enable loadable module support."
@@ -1286,6 +1313,7 @@ boards := $(sort $(notdir $(boards)))
board-dirs := $(dir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*/*_defconfig))
board-dirs := $(sort $(notdir $(board-dirs:/=)))
+PHONY += help
help:
@echo 'Cleaning targets:'
@echo ' clean - Remove most generated files but keep the config and'
@@ -1456,6 +1484,7 @@ $(clean-dirs):
clean: rm-dirs := $(MODVERDIR)
clean: rm-files := $(KBUILD_EXTMOD)/Module.symvers
+PHONY += help
help:
@echo ' Building external modules.'
@echo ' Syntax: make -C path/to/kernel/src M=$$PWD target'