From patchwork Thu Apr 16 04:38:25 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Masahiro Yamada X-Patchwork-Id: 237820 List-Id: U-Boot discussion From: masahiroy at kernel.org (Masahiro Yamada) Date: Thu, 16 Apr 2020 13:38:25 +0900 Subject: [PATCH 2/3] kbuild: cherry-pick kbuild changes from Linux In-Reply-To: <20200416043826.490120-1-masahiroy@kernel.org> References: <20200416043826.490120-1-masahiroy@kernel.org> Message-ID: <20200416043826.490120-3-masahiroy@kernel.org> Import the following commits from Linux. They are mostly nice cleanups. b42841b7bb62 kbuild: Get rid of KBUILD_STR ebf003f0cfb3 kbuild: Consolidate header generation from ASM offset information 2982c953570b kbuild: remove redundant $(wildcard ...) for cmd_files calculation 8a78756eb545 kbuild: create object directories simpler and faster 4d4b5c2e3b6e treewide: remove explicit rules for *offsets.s 01d509a48b46 kbuild: remove unimportant comments from ./Kbuild Signed-off-by: Masahiro Yamada Reviewed-by: Simon Glass Tested-by: Simon Glass --- Kbuild | 45 +++--------------------------------------- Makefile | 3 +-- scripts/Makefile.build | 18 +++++------------ scripts/Makefile.host | 12 ----------- scripts/Makefile.lib | 42 ++++++++++++++++++++++++++++++--------- 5 files changed, 42 insertions(+), 78 deletions(-) diff --git a/Kbuild b/Kbuild index e2e3b2995f..6014f7c34a 100644 --- a/Kbuild +++ b/Kbuild @@ -1,54 +1,20 @@ +# SPDX-License-Identifier: GPL-2.0 # # Kbuild for top-level directory of U-Boot -# This file takes care of the following: -# 1) Generate generic-asm-offsets.h -# 2) Generate asm-offsets.h - -# Default sed regexp - multiline due to syntax constraints -define sed-y - "s:[[:space:]]*\.ascii[[:space:]]*\"\(.*\)\":\1:; \ - /^->/{s:->#\(.*\):/* \1 */:; \ - s:^->\([^ ]*\) [\$$#]*\([-0-9]*\) \(.*\):#define \1 \2 /* \3 */:; \ - s:^->\([^ ]*\) [\$$#]*\([^ ]*\) \(.*\):#define \1 \2 /* \3 */:; \ - s:->::; p;}" -endef - -# Use filechk to avoid rebuilds when a header changes, but the resulting file -# does not -define filechk_offsets - (set -e; \ - echo "#ifndef $2"; \ - echo "#define $2"; \ - echo "/*"; \ - echo " * DO NOT MODIFY."; \ - echo " *"; \ - echo " * This file was generated by Kbuild"; \ - echo " */"; \ - echo ""; \ - sed -ne $(sed-y); \ - echo ""; \ - echo "#endif" ) -endef ##### -# 1) Generate generic-asm-offsets.h +# Generate generic-asm-offsets.h generic-offsets-file := include/generated/generic-asm-offsets.h always := $(generic-offsets-file) targets := lib/asm-offsets.s -# We use internal kbuild rules to avoid the "is up to date" message from make -lib/asm-offsets.s: lib/asm-offsets.c FORCE - $(Q)mkdir -p $(dir $@) - $(call if_changed_dep,cc_s_c) - $(obj)/$(generic-offsets-file): lib/asm-offsets.s FORCE $(call filechk,offsets,__GENERIC_ASM_OFFSETS_H__) ##### -# 2) Generate asm-offsets.h -# +# Generate asm-offsets.h ifneq ($(wildcard $(srctree)/arch/$(ARCH)/lib/asm-offsets.c),) offsets-file := include/generated/asm-offsets.h @@ -59,10 +25,5 @@ targets += arch/$(ARCH)/lib/asm-offsets.s CFLAGS_asm-offsets.o := -DDO_DEPS_ONLY -# We use internal kbuild rules to avoid the "is up to date" message from make -arch/$(ARCH)/lib/asm-offsets.s: arch/$(ARCH)/lib/asm-offsets.c FORCE - $(Q)mkdir -p $(dir $@) - $(call if_changed_dep,cc_s_c) - $(obj)/$(offsets-file): arch/$(ARCH)/lib/asm-offsets.s FORCE $(call filechk,offsets,__ASM_OFFSETS_H__) diff --git a/Makefile b/Makefile index e5c05028dc..38689de77b 100644 --- a/Makefile +++ b/Makefile @@ -2190,8 +2190,7 @@ quiet_cmd_rmfiles = $(if $(wildcard $(rm-files)),CLEAN $(wildcard $(rm-files)) # read all saved command lines -targets := $(wildcard $(sort $(targets))) -cmd_files := $(wildcard .*.cmd $(foreach f,$(targets),$(dir $(f)).$(notdir $(f)).cmd)) +cmd_files := $(wildcard .*.cmd $(foreach f,$(sort $(targets)),$(dir $(f)).$(notdir $(f)).cmd)) ifneq ($(cmd_files),) $(cmd_files): ; # Do not try to update included dependency files diff --git a/scripts/Makefile.build b/scripts/Makefile.build index f8362fbd89..6fa1c7ffda 100644 --- a/scripts/Makefile.build +++ b/scripts/Makefile.build @@ -82,17 +82,6 @@ ifneq ($(hostprogs-y)$(hostprogs-m),) include scripts/Makefile.host endif -# Uncommented for U-Boot -# We need to create output dicrectory for SPL and TPL even for in-tree build -#ifneq ($(KBUILD_SRC),) -# Create output directory if not already present -_dummy := $(shell [ -d $(obj) ] || mkdir -p $(obj)) - -# Create directories for object files if directory does not exist -# Needed when obj-y := dir/file.o syntax is used -_dummy := $(foreach d,$(obj-dirs), $(shell [ -d $(d) ] || mkdir -p $(d))) -#endif - ifndef obj $(warning kbuild: Makefile.build is included improperly) endif @@ -448,11 +437,14 @@ FORCE: # optimization, we don't need to read them if the target does not # exist, we will rebuild anyway in that case. -targets := $(wildcard $(sort $(targets))) -cmd_files := $(wildcard $(foreach f,$(targets),$(dir $(f)).$(notdir $(f)).cmd)) +cmd_files := $(wildcard $(foreach f,$(sort $(targets)),$(dir $(f)).$(notdir $(f)).cmd)) ifneq ($(cmd_files),) include $(cmd_files) endif +# Create directories for object files if they do not exist +obj-dirs := $(sort $(obj) $(patsubst %/,%, $(dir $(targets)))) +$(shell mkdir -p $(obj-dirs)) + .PHONY: $(PHONY) diff --git a/scripts/Makefile.host b/scripts/Makefile.host index e3379a3c51..3b2b3ff846 100644 --- a/scripts/Makefile.host +++ b/scripts/Makefile.host @@ -47,24 +47,12 @@ host-cxxmulti := $(foreach m,$(__hostprogs),$(if $($(m)-cxxobjs),$(m))) # C++ Object (.o) files compiled from .cc files host-cxxobjs := $(sort $(foreach m,$(host-cxxmulti),$($(m)-cxxobjs))) -# output directory for programs/.o files -# hostprogs-y := tools/build may have been specified. -# Retrieve also directory of .o files from prog-objs or prog-cxxobjs notation -host-objdirs := $(dir $(__hostprogs) $(host-cobjs) $(host-cxxobjs)) - -host-objdirs := $(strip $(sort $(filter-out ./,$(host-objdirs)))) - - -__hostprogs := $(addprefix $(obj)/,$(__hostprogs)) host-csingle := $(addprefix $(obj)/,$(host-csingle)) host-cmulti := $(addprefix $(obj)/,$(host-cmulti)) host-cobjs := $(addprefix $(obj)/,$(host-cobjs)) host-cxxmulti := $(addprefix $(obj)/,$(host-cxxmulti)) host-cxxobjs := $(addprefix $(obj)/,$(host-cxxobjs)) host-shared := $(addprefix $(obj)/,$(host-shared)) -host-objdirs := $(addprefix $(obj)/,$(host-objdirs)) - -obj-dirs += $(host-objdirs) ##### # Handle options to gcc. Support building with separate output directory diff --git a/scripts/Makefile.lib b/scripts/Makefile.lib index 8c77eaaa4e..89e8dfb03a 100644 --- a/scripts/Makefile.lib +++ b/scripts/Makefile.lib @@ -57,15 +57,11 @@ single-used-m := $(sort $(filter-out $(multi-used-m),$(obj-m))) # objects depend on those (obviously) multi-objs-y := $(foreach m, $(multi-used-y), $($(m:.o=-objs)) $($(m:.o=-y))) multi-objs-m := $(foreach m, $(multi-used-m), $($(m:.o=-objs)) $($(m:.o=-y))) -multi-objs := $(multi-objs-y) $(multi-objs-m) # $(subdir-obj-y) is the list of objects in $(obj-y) which uses dir/ to # tell kbuild to descend subdir-obj-y := $(filter %/built-in.o, $(obj-y)) -# $(obj-dirs) is a list of directories that contain object files -obj-dirs := $(dir $(multi-objs) $(obj-y)) - # Replace multi-part objects by their individual parts, look at local dir only real-objs-y := $(foreach m, $(filter-out $(subdir-obj-y), $(obj-y)), $(if $(strip $($(m:.o=-objs)) $($(m:.o=-y))),$($(m:.o=-objs)) $($(m:.o=-y)),$(m))) $(extra-y) real-objs-m := $(foreach m, $(obj-m), $(if $(strip $($(m:.o=-objs)) $($(m:.o=-y))),$($(m:.o=-objs)) $($(m:.o=-y)),$(m))) @@ -88,7 +84,6 @@ multi-used-m := $(addprefix $(obj)/,$(multi-used-m)) multi-objs-y := $(addprefix $(obj)/,$(multi-objs-y)) multi-objs-m := $(addprefix $(obj)/,$(multi-objs-m)) subdir-ym := $(addprefix $(obj)/,$(subdir-ym)) -obj-dirs := $(addprefix $(obj)/,$(obj-dirs)) # These flags are needed for modversions and compiling, so we define them here # already @@ -97,10 +92,10 @@ obj-dirs := $(addprefix $(obj)/,$(obj-dirs)) # Note: Files that end up in two or more modules are compiled without the # KBUILD_MODNAME definition. The reason is that any made-up name would # differ in different configs. -name-fix = $(subst $(comma),_,$(subst -,_,$1)) -basename_flags = -D"KBUILD_BASENAME=KBUILD_STR($(call name-fix,$(basetarget)))" +name-fix = $(squote)$(quote)$(subst $(comma),_,$(subst -,_,$1))$(quote)$(squote) +basename_flags = -DKBUILD_BASENAME=$(call name-fix,$(basetarget)) modname_flags = $(if $(filter 1,$(words $(modname))),\ - -D"KBUILD_MODNAME=KBUILD_STR($(call name-fix,$(modname)))") + -DKBUILD_MODNAME=$(call name-fix,$(modname))) orig_c_flags = $(KBUILD_CPPFLAGS) $(KBUILD_CFLAGS) $(KBUILD_SUBDIR_CCFLAGS) \ $(ccflags-y) $(CFLAGS_$(basetarget).o) @@ -153,7 +148,7 @@ endif # Modified for U-Boot: LINUXINCLUDE -> UBOOTINCLUDE c_flags = -Wp,-MD,$(depfile) $(NOSTDINC_FLAGS) $(UBOOTINCLUDE) \ $(__c_flags) $(modkern_cflags) \ - -D"KBUILD_STR(s)=\#s" $(basename_flags) $(modname_flags) + $(basename_flags) $(modname_flags) a_flags = -Wp,-MD,$(depfile) $(NOSTDINC_FLAGS) $(UBOOTINCLUDE) \ $(__a_flags) $(modkern_aflags) @@ -577,3 +572,32 @@ quiet_cmd_fdtgrep = FDTGREP $@ quiet_cmd_fdt_rm_props = FDTGREP $@ cmd_fdt_rm_props = cat $< | $(objtree)/tools/fdtgrep -r -O dtb - -o $@ \ $(addprefix -P ,$(subst $\",,$(CONFIG_OF_REMOVE_PROPS))) + +# ASM offsets +# --------------------------------------------------------------------------- + +# Default sed regexp - multiline due to syntax constraints +define sed-offsets + "s:[[:space:]]*\.ascii[[:space:]]*\"\(.*\)\":\1:; \ + /^->/{s:->#\(.*\):/* \1 */:; \ + s:^->\([^ ]*\) [\$$#]*\([-0-9]*\) \(.*\):#define \1 \2 /* \3 */:; \ + s:^->\([^ ]*\) [\$$#]*\([^ ]*\) \(.*\):#define \1 \2 /* \3 */:; \ + s:->::; p;}" +endef + +# Use filechk to avoid rebuilds when a header changes, but the resulting file +# does not +define filechk_offsets + (set -e; \ + echo "#ifndef $2"; \ + echo "#define $2"; \ + echo "/*"; \ + echo " * DO NOT MODIFY."; \ + echo " *"; \ + echo " * This file was generated by Kbuild"; \ + echo " */"; \ + echo ""; \ + sed -ne $(sed-offsets); \ + echo ""; \ + echo "#endif" ) +endef