path: root/Makefile
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authorLinus Torvalds <torvalds@linux-foundation.org>2018-10-28 13:22:35 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2018-10-28 13:22:35 -0700
commitac747c0715f29c2be3848b719a1b7e65b07f7b21 (patch)
tree600d57fa0f71b545fea3eb5fe3f47a7124c713e3 /Makefile
parentf8cab69be0a8a756a7409f6d2bd1e6e96ce46482 (diff)
parentc2b1a9226fe7c1cee8f0ae42496f3eb282d73ebb (diff)
Merge tag 'kbuild-v4.20' of git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild
Pull Kbuild updates from Masahiro Yamada: - optimize kallsyms slightly - remove check for old CFLAGS usage - add some compiler flags unconditionally instead of evaluating $(call cc-option,...) - fix variable shadowing in host tools - refactor scripts/mkmakefile - refactor various makefiles * tag 'kbuild-v4.20' of git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild: modpost: Create macro to avoid variable shadowing ASN.1: Remove unnecessary shadowed local variable kbuild: use 'else ifeq' for checksrc to improve readability kbuild: remove unneeded link_multi_deps kbuild: add -Wno-unused-but-set-variable flag unconditionally kbuild: add -Wdeclaration-after-statement flag unconditionally kbuild: add -Wno-pointer-sign flag unconditionally modpost: remove leftover symbol prefix handling for module device table kbuild: simplify command line creation in scripts/mkmakefile kbuild: do not pass $(objtree) to scripts/mkmakefile kbuild: remove user ID check in scripts/mkmakefile kbuild: remove VERSION and PATCHLEVEL from $(objtree)/Makefile kbuild: add --include-dir flag only for out-of-tree build kbuild: remove dead code in cmd_files calculation in top Makefile kbuild: hide most of targets when running config or mixed targets kbuild: remove old check for CFLAGS use kbuild: prefix Makefile.dtbinst path with $(srctree) unconditionally kallsyms: remove left-over Blackfin code kallsyms: reduce size a little on 64-bit
Diffstat (limited to 'Makefile')
1 files changed, 17 insertions, 14 deletions
diff --git a/Makefile b/Makefile
index 7d4ba5196010..eb73f062e9e9 100644
--- a/Makefile
+++ b/Makefile
@@ -15,10 +15,9 @@ NAME = "People's Front"
PHONY := _all
-# o Do not use make's built-in rules and variables
-# (this increases performance and avoids hard-to-debug behaviour);
-# o Look for make include files relative to root of kernel src
-MAKEFLAGS += -rR --include-dir=$(CURDIR)
+# Do not use make's built-in rules and variables
+# (this increases performance and avoids hard-to-debug behaviour)
# Avoid funny character set dependencies
unexport LC_ALL
@@ -136,6 +135,13 @@ KBUILD_OUTPUT := $(shell mkdir -p $(KBUILD_OUTPUT) && cd $(KBUILD_OUTPUT) \
$(if $(KBUILD_OUTPUT),, \
$(error failed to create output directory "$(saved-output)"))
+# Look for make include files relative to root of kernel src
+# This does not become effective immediately because MAKEFLAGS is re-parsed
+# once after the Makefile is read. It is OK since we are going to invoke
+# 'sub-make' below.
+MAKEFLAGS += --include-dir=$(CURDIR)
$(filter-out _all sub-make $(CURDIR)/Makefile, $(MAKECMDGOALS)) _all: sub-make
@@ -476,8 +482,7 @@ PHONY += outputmakefile
ifneq ($(KBUILD_SRC),)
$(Q)ln -fsn $(srctree) source
- $(Q)$(CONFIG_SHELL) $(srctree)/scripts/mkmakefile \
- $(srctree) $(objtree) $(VERSION) $(PATCHLEVEL)
+ $(Q)$(CONFIG_SHELL) $(srctree)/scripts/mkmakefile $(srctree)
ifeq ($(cc-name),clang)
@@ -713,7 +718,7 @@ else
# These warnings generated too much noise in a regular build.
# Use make W=1 to enable them (see scripts/Makefile.extrawarn)
-KBUILD_CFLAGS += $(call cc-disable-warning, unused-but-set-variable)
+KBUILD_CFLAGS += -Wno-unused-but-set-variable
KBUILD_CFLAGS += $(call cc-disable-warning, unused-const-variable)
@@ -794,10 +799,10 @@ endif
NOSTDINC_FLAGS += -nostdinc -isystem $(shell $(CC) -print-file-name=include)
# warn about C99 declaration after statement
-KBUILD_CFLAGS += $(call cc-option,-Wdeclaration-after-statement,)
+KBUILD_CFLAGS += -Wdeclaration-after-statement
# disable pointer signed / unsigned warnings in gcc 4.0
-KBUILD_CFLAGS += $(call cc-disable-warning, pointer-sign)
+KBUILD_CFLAGS += -Wno-pointer-sign
# disable stringop warnings in gcc 8+
KBUILD_CFLAGS += $(call cc-disable-warning, stringop-truncation)
@@ -1647,9 +1652,6 @@ namespacecheck:
$(PERL) $(srctree)/scripts/export_report.pl
-endif #ifeq ($(config-targets),1)
-endif #ifeq ($(mixed-targets),1)
PHONY += checkstack kernelrelease kernelversion image_name
# UML needs a little special treatment here. It wants to use the host
@@ -1756,14 +1758,15 @@ cmd_crmodverdir = $(Q)mkdir -p $(MODVERDIR) \
$(if $(KBUILD_MODULES),; rm -f $(MODVERDIR)/*)
# read all saved command lines
-cmd_files := $(wildcard .*.cmd $(foreach f,$(sort $(targets)),$(dir $(f)).$(notdir $(f)).cmd))
+cmd_files := $(wildcard .*.cmd)
ifneq ($(cmd_files),)
$(cmd_files): ; # Do not try to update included dependency files
include $(cmd_files)
+endif # ifeq ($(config-targets),1)
+endif # ifeq ($(mixed-targets),1)
endif # skip-makefile