diff mbox series

[2/3] kbuild: cherry-pick kbuild changes from Linux

Message ID 20200416043826.490120-3-masahiroy@kernel.org
State New
Headers show
Series support separate asm-offsets.h for SPL and TPL | expand

Commit Message

Masahiro Yamada April 16, 2020, 4:38 a.m. UTC 
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 <masahiroy at kernel.org>
---

 Kbuild                 | 45 +++---------------------------------------
 Makefile               |  3 +--
 scripts/Makefile.build | 18 +++++------------
 scripts/Makefile.host  | 12 -----------
 scripts/Makefile.lib   | 42 ++++++++++++++++++++++++++++++---------
 5 files changed, 42 insertions(+), 78 deletions(-)

Comments

Simon Glass April 19, 2020, 11:37 p.m. UTC | #1 
On Wed, 15 Apr 2020 at 22:39, Masahiro Yamada <masahiroy at kernel.org> wrote:
>
> 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 <masahiroy at kernel.org>
> ---
>
>  Kbuild                 | 45 +++---------------------------------------
>  Makefile               |  3 +--
>  scripts/Makefile.build | 18 +++++------------
>  scripts/Makefile.host  | 12 -----------
>  scripts/Makefile.lib   | 42 ++++++++++++++++++++++++++++++---------
>  5 files changed, 42 insertions(+), 78 deletions(-)
>

Reviewed-by: Simon Glass <sjg at chromium.org>
Tested on sandbox with buildman, etc.:
Tested-by: Simon Glass <sjg at chromium.org>
diff mbox series

Patch

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