From f6112ec27a8f0eee6c5a996f65c7bfd9457d9f85 Mon Sep 17 00:00:00 2001 From: Oleg Verych Date: Tue, 6 Feb 2007 02:18:20 +0100 Subject: [PATCH] kbuild scripts: replace gawk, head, bc with shell, update Replacing overhead of using some (external) programs instead of good old `sh'. Cc: Roman Zippel Cc: Sam Ravnborg Cc: William Stearns Cc: Martin Schlemmer Signed-off-by: Oleg Verych Acked-by: Mark Lord Signed-off-by: Linus Torvalds --- scripts/gen_initramfs_list.sh | 43 ++++++++++++++++++++++--------------------- scripts/makelst | 34 +++++++++++++++++----------------- 2 files changed, 39 insertions(+), 38 deletions(-) (limited to 'scripts') diff --git a/scripts/gen_initramfs_list.sh b/scripts/gen_initramfs_list.sh index 4c723fd18648..43f75d6e4d96 100644 --- a/scripts/gen_initramfs_list.sh +++ b/scripts/gen_initramfs_list.sh @@ -1,6 +1,6 @@ #!/bin/bash # Copyright (C) Martin Schlemmer -# Copyright (c) 2006 Sam Ravnborg +# Copyright (C) 2006 Sam Ravnborg # # Released under the terms of the GNU GPL # @@ -17,15 +17,15 @@ cat << EOF Usage: $0 [-o ] [-u ] [-g ] {-d | } ... -o Create gzipped initramfs file named using - gen_init_cpio and gzip + gen_init_cpio and gzip -u User ID to map to user ID 0 (root). - is only meaningful if - is a directory. + is only meaningful if + is a directory. -g Group ID to map to group ID 0 (root). - is only meaningful if - is a directory. + is only meaningful if + is a directory. File list or directory for cpio archive. - If is a .cpio file it will be used + If is a .cpio file it will be used as direct input to initramfs. -d Output the default cpio list. @@ -36,6 +36,12 @@ to reset the root/group mapping. EOF } +# awk style field access +# $1 - field number; rest is argument string +field() { + shift $1 ; echo $1 +} + list_default_initramfs() { # echo usr/kinit/kinit : @@ -119,22 +125,17 @@ parse() { str="${ftype} ${name} ${location} ${str}" ;; "nod") - local dev_type= - local maj=$(LC_ALL=C ls -l "${location}" | \ - gawk '{sub(/,/, "", $5); print $5}') - local min=$(LC_ALL=C ls -l "${location}" | \ - gawk '{print $6}') - - if [ -b "${location}" ]; then - dev_type="b" - else - dev_type="c" - fi - str="${ftype} ${name} ${str} ${dev_type} ${maj} ${min}" + local dev=`LC_ALL=C ls -l "${location}"` + local maj=`field 5 ${dev}` + local min=`field 6 ${dev}` + maj=${maj%,} + + [ -b "${location}" ] && dev="b" || dev="c" + + str="${ftype} ${name} ${str} ${dev} ${maj} ${min}" ;; "slink") - local target=$(LC_ALL=C ls -l "${location}" | \ - gawk '{print $11}') + local target=`field 11 $(LC_ALL=C ls -l "${location}")` str="${ftype} ${name} ${target} ${str}" ;; *) diff --git a/scripts/makelst b/scripts/makelst index 34bd72391238..4fc80f2b7e19 100755 --- a/scripts/makelst +++ b/scripts/makelst @@ -1,31 +1,31 @@ -#!/bin/bash +#!/bin/sh # A script to dump mixed source code & assembly # with correct relocations from System.map -# Requires the following lines in Rules.make. -# Author(s): DJ Barrow (djbarrow@de.ibm.com,barrow_dj@yahoo.com) -# William Stearns +# Requires the following lines in makefile: #%.lst: %.c # $(CC) $(CFLAGS) $(EXTRA_CFLAGS) $(CFLAGS_$@) -g -c -o $*.o $< -# $(TOPDIR)/scripts/makelst $*.o $(TOPDIR)/System.map $(OBJDUMP) +# $(srctree)/scripts/makelst $*.o $(objtree)/System.map $(OBJDUMP) # -# Copyright (C) 2000 IBM Corporation -# Author(s): DJ Barrow (djbarrow@de.ibm.com,barrow_dj@yahoo.com) +# Copyright (C) 2000 IBM Corporation +# Author(s): DJ Barrow (djbarrow@de.ibm.com,barrow_dj@yahoo.com) +# William Stearns # -t1=`$3 --syms $1 | grep .text | grep " F " | head -n 1` +# awk style field access +field() { + shift $1 ; echo $1 +} + +t1=`$3 --syms $1 | grep .text | grep -m1 " F "` if [ -n "$t1" ]; then - t2=`echo $t1 | gawk '{ print $6 }'` + t2=`field 6 $t1` if [ ! -r $2 ]; then echo "No System.map" >&2 - t7=0 else t3=`grep $t2 $2` - t4=`echo $t3 | gawk '{ print $1 }'` - t5=`echo $t1 | gawk '{ print $1 }'` - t6=`echo $t4 - $t5 | tr a-f A-F` - t7=`( echo ibase=16 ; echo $t6 ) | bc` + t4=`field 1 $t3` + t5=`field 1 $t1` + t6=`printf "%lu" $((0x$t4 - 0x$t5))` fi -else - t7=0 fi -$3 -r --source --adjust-vma=$t7 $1 +$3 -r --source --adjust-vma=${t6:-0} $1 -- cgit v1.2.3 From 5de043f4bd11a9e0a3e8daec7d1905da575a76b7 Mon Sep 17 00:00:00 2001 From: Oleg Verych Date: Tue, 6 Feb 2007 02:18:21 +0100 Subject: [PATCH] kbuild: improve option checking, Kbuild.include cleanup GNU binutils, root users, tmpfiles, external modules ro builds must be fixed to do the right thing now. Cc: Roman Zippel Cc: Sam Ravnborg Cc: Horst Schirmeier Cc: Jan Beulich Cc: Daniel Drake Cc: Andi Kleen Cc: Randy Dunlap Signed-off-by: Oleg Verych Signed-off-by: Linus Torvalds --- scripts/Kbuild.include | 96 ++++++++++++++++++++++++++++---------------------- 1 file changed, 53 insertions(+), 43 deletions(-) (limited to 'scripts') diff --git a/scripts/Kbuild.include b/scripts/Kbuild.include index f01f8c072852..96926eb13b0a 100644 --- a/scripts/Kbuild.include +++ b/scripts/Kbuild.include @@ -1,7 +1,7 @@ #### # kbuild: Generic definitions -# Convinient variables +# Convenient constants comma := , squote := ' empty := @@ -56,40 +56,46 @@ endef # gcc support functions # See documentation in Documentation/kbuild/makefiles.txt -# output directory for tests below -TMPOUT := $(if $(KBUILD_EXTMOD),$(firstword $(KBUILD_EXTMOD))/) +# checker-shell +# Usage: option = $(call checker-shell, $(CC)...-o $$OUT, option-ok, otherwise) +# Exit code chooses option. $$OUT is safe location for needless output. +define checker-shell + $(shell set -e; \ + DIR=$(KBUILD_EXTMOD); \ + cd $${DIR:-$(objtree)}; \ + OUT=$$PWD/.$$$$.null; \ + \ + ln -s /dev/null $$OUT; \ + if $(1) >/dev/null 2>&1; \ + then echo "$(2)"; \ + else echo "$(3)"; \ + fi; \ + rm -f $$OUT) +endef # as-option # Usage: cflags-y += $(call as-option, -Wa$(comma)-isa=foo,) - -as-option = $(shell if $(CC) $(CFLAGS) $(1) -Wa,-Z -c -o /dev/null \ - -xassembler /dev/null > /dev/null 2>&1; then echo "$(1)"; \ - else echo "$(2)"; fi ;) +as-option = $(call checker-shell, \ + $(CC) $(CFLAGS) $(1) -c -xassembler /dev/null -o $$OUT, $(1), $(2)) # as-instr # Usage: cflags-y += $(call as-instr, instr, option1, option2) - -as-instr = $(shell if echo -e "$(1)" | \ - $(CC) $(AFLAGS) -c -xassembler - \ - -o $(TMPOUT)astest$$$$.out > /dev/null 2>&1; \ - then rm $(TMPOUT)astest$$$$.out; echo "$(2)"; \ - else echo "$(3)"; fi) +as-instr = $(call checker-shell, \ + printf "$(1)" | $(CC) $(AFLAGS) -c -xassembler -o $$OUT -, $(2), $(3)) # cc-option # Usage: cflags-y += $(call cc-option, -march=winchip-c6, -march=i586) - -cc-option = $(shell if $(CC) $(CFLAGS) $(1) -S -o /dev/null -xc /dev/null \ - > /dev/null 2>&1; then echo "$(1)"; else echo "$(2)"; fi ;) +cc-option = $(call checker-shell, \ + $(CC) $(CFLAGS) $(if $(3),$(3),$(1)) -S -xc /dev/null -o $$OUT, $(1), $(2)) # cc-option-yn # Usage: flag := $(call cc-option-yn, -march=winchip-c6) -cc-option-yn = $(shell if $(CC) $(CFLAGS) $(1) -S -o /dev/null -xc /dev/null \ - > /dev/null 2>&1; then echo "y"; else echo "n"; fi;) +cc-option-yn = $(call cc-option, "y", "n", $(1)) # cc-option-align # Prefix align with either -falign or -malign cc-option-align = $(subst -functions=0,,\ - $(call cc-option,-falign-functions=0,-malign-functions=0)) + $(call cc-option,-falign-functions=0,-malign-functions=0)) # cc-version # Usage gcc-ver := $(call cc-version, $(CC)) @@ -97,35 +103,42 @@ cc-version = $(shell $(CONFIG_SHELL) $(srctree)/scripts/gcc-version.sh $(CC)) # cc-ifversion # Usage: EXTRA_CFLAGS += $(call cc-ifversion, -lt, 0402, -O1) -cc-ifversion = $(shell if [ $(call cc-version, $(CC)) $(1) $(2) ]; then \ - echo $(3); fi;) +cc-ifversion = $(shell [ $(call cc-version, $(CC)) $(1) $(2) ] && echo $(3)) # ld-option # Usage: ldflags += $(call ld-option, -Wl$(comma)--hash-style=both) -ld-option = $(shell if $(CC) $(1) -nostdlib -xc /dev/null \ - -o $(TMPOUT)ldtest$$$$.out > /dev/null 2>&1; \ - then rm $(TMPOUT)ldtest$$$$.out; echo "$(1)"; \ - else echo "$(2)"; fi) +ld-option = $(call checker-shell, \ + $(CC) $(1) -nostdlib -xc /dev/null -o $$OUT, $(1), $(2)) + +###### -### # Shorthand for $(Q)$(MAKE) -f scripts/Makefile.build obj= # Usage: # $(Q)$(MAKE) $(build)=dir build := -f $(if $(KBUILD_SRC),$(srctree)/)scripts/Makefile.build obj -# Prefix -I with $(srctree) if it is not an absolute path -addtree = $(if $(filter-out -I/%,$(1)),$(patsubst -I%,-I$(srctree)/%,$(1))) $(1) +# Prefix -I with $(srctree) if it is not an absolute path, +# add original to the end +addtree = $(if \ + $(filter-out -I/%, $(1)), $(patsubst -I%,-I$(srctree)/%,$(1))) $(1) + # Find all -I options and call addtree -flags = $(foreach o,$($(1)),$(if $(filter -I%,$(o)),$(call addtree,$(o)),$(o))) +flags = $(foreach o,$($(1)), \ + $(if $(filter -I%,$(o)), $(call addtree, $(o)), $(o))) -# If quiet is set, only print short version of command +# echo command. +# Short version is used, if $(quiet) equals `quiet_', otherwise full one. +echo-cmd = $(if $($(quiet)cmd_$(1)), \ + echo ' $(call escsq,$($(quiet)cmd_$(1)))$(echo-why)';) + +# printing commands cmd = @$(echo-cmd) $(cmd_$(1)) -# Add $(obj)/ for paths that is not absolute -objectify = $(foreach o,$(1),$(if $(filter /%,$(o)),$(o),$(obj)/$(o))) +# Add $(obj)/ for paths that are not absolute +objectify = $(foreach o,$(1), $(if $(filter /%,$(o)), $(o), $(obj)/$(o))) ### -# if_changed - execute command if any prerequisite is newer than +# if_changed - execute command if any prerequisite is newer than # target, or command line has changed # if_changed_dep - as if_changed, but uses fixdep to reveal dependencies # including used config symbols @@ -133,16 +146,12 @@ objectify = $(foreach o,$(1),$(if $(filter /%,$(o)),$(o),$(obj)/$(o))) # See Documentation/kbuild/makefiles.txt for more info ifneq ($(KBUILD_NOCMDDEP),1) -# Check if both arguments has same arguments. Result in empty string if equal +# Check if both arguments has same arguments. Result is empty string, if equal. # User may override this check using make KBUILD_NOCMDDEP=1 arg-check = $(strip $(filter-out $(cmd_$(1)), $(cmd_$@)) \ $(filter-out $(cmd_$@), $(cmd_$(1))) ) endif -# echo command. Short version is $(quiet) equals quiet, otherwise full command -echo-cmd = $(if $($(quiet)cmd_$(1)), \ - echo ' $(call escsq,$($(quiet)cmd_$(1)))$(echo-why)';) - # >'< substitution is for echo to work, # >$< substitution to preserve $ when reloading .cmd file # note: when using inline perl scripts [perl -e '...$$t=1;...'] @@ -153,15 +162,15 @@ make-cmd = $(subst \#,\\\#,$(subst $$,$$$$,$(call escsq,$(cmd_$(1))))) # PHONY targets skipped in both cases. any-prereq = $(filter-out $(PHONY),$?) $(filter-out $(PHONY) $(wildcard $^),$^) -# Execute command if command has changed or prerequisitei(s) are updated +# Execute command if command has changed or prerequisite(s) are updated. # if_changed = $(if $(strip $(any-prereq) $(arg-check)), \ @set -e; \ $(echo-cmd) $(cmd_$(1)); \ echo 'cmd_$@ := $(make-cmd)' > $(dot-target).cmd) -# execute the command and also postprocess generated .d dependencies -# file +# Execute the command and also postprocess generated .d dependencies file. +# if_changed_dep = $(if $(strip $(any-prereq) $(arg-check) ), \ @set -e; \ $(echo-cmd) $(cmd_$(1)); \ @@ -169,9 +178,10 @@ if_changed_dep = $(if $(strip $(any-prereq) $(arg-check) ), \ rm -f $(depfile); \ mv -f $(dot-target).tmp $(dot-target).cmd) +# Will check if $(cmd_foo) changed, or any of the prerequisites changed, +# and if so will execute $(rule_foo). # Usage: $(call if_changed_rule,foo) -# will check if $(cmd_foo) changed, or any of the prequisites changed, -# and if so will execute $(rule_foo) +# if_changed_rule = $(if $(strip $(any-prereq) $(arg-check) ), \ @set -e; \ $(rule_$(1))) -- cgit v1.2.3 From bff288c19e8b6217ddd660d4fa42c29a0ab1d58c Mon Sep 17 00:00:00 2001 From: Oleg Verych Date: Wed, 7 Feb 2007 23:04:35 +0100 Subject: [PATCH] kbuild, Kbuild.include: avoid using spaces in call arguments Do not use whitespace in arguments of functions in makefiles, as they propagate further without notice. Thus we get + echo ' y' instead of + echo y Fix misleading comments. Signed-off-by: Oleg Verych Signed-off-by: Linus Torvalds --- scripts/Kbuild.include | 40 ++++++++++++++++++++-------------------- 1 file changed, 20 insertions(+), 20 deletions(-) (limited to 'scripts') diff --git a/scripts/Kbuild.include b/scripts/Kbuild.include index 96926eb13b0a..d65c40331e66 100644 --- a/scripts/Kbuild.include +++ b/scripts/Kbuild.include @@ -57,7 +57,7 @@ endef # See documentation in Documentation/kbuild/makefiles.txt # checker-shell -# Usage: option = $(call checker-shell, $(CC)...-o $$OUT, option-ok, otherwise) +# Usage: option = $(call checker-shell,$(CC)...-o $$OUT,option-ok,otherwise) # Exit code chooses option. $$OUT is safe location for needless output. define checker-shell $(shell set -e; \ @@ -74,23 +74,23 @@ define checker-shell endef # as-option -# Usage: cflags-y += $(call as-option, -Wa$(comma)-isa=foo,) -as-option = $(call checker-shell, \ - $(CC) $(CFLAGS) $(1) -c -xassembler /dev/null -o $$OUT, $(1), $(2)) +# Usage: cflags-y += $(call as-option,-Wa$(comma)-isa=foo,) +as-option = $(call checker-shell,\ + $(CC) $(CFLAGS) $(1) -c -xassembler /dev/null -o $$OUT,$(1),$(2)) # as-instr -# Usage: cflags-y += $(call as-instr, instr, option1, option2) -as-instr = $(call checker-shell, \ - printf "$(1)" | $(CC) $(AFLAGS) -c -xassembler -o $$OUT -, $(2), $(3)) +# Usage: cflags-y += $(call as-instr,instr,option1,option2) +as-instr = $(call checker-shell,\ + printf "$(1)" | $(CC) $(AFLAGS) -c -xassembler -o $$OUT -,$(2),$(3)) # cc-option -# Usage: cflags-y += $(call cc-option, -march=winchip-c6, -march=i586) -cc-option = $(call checker-shell, \ - $(CC) $(CFLAGS) $(if $(3),$(3),$(1)) -S -xc /dev/null -o $$OUT, $(1), $(2)) +# Usage: cflags-y += $(call cc-option,-march=winchip-c6,-march=i586) +cc-option = $(call checker-shell,\ + $(CC) $(CFLAGS) $(if $(3),$(3),$(1)) -S -xc /dev/null -o $$OUT,$(1),$(2)) # cc-option-yn -# Usage: flag := $(call cc-option-yn, -march=winchip-c6) -cc-option-yn = $(call cc-option, "y", "n", $(1)) +# Usage: flag := $(call cc-option-yn,-march=winchip-c6) +cc-option-yn = $(call cc-option,"y","n",$(1)) # cc-option-align # Prefix align with either -falign or -malign @@ -98,7 +98,7 @@ cc-option-align = $(subst -functions=0,,\ $(call cc-option,-falign-functions=0,-malign-functions=0)) # cc-version -# Usage gcc-ver := $(call cc-version, $(CC)) +# Usage gcc-ver := $(call cc-version,$(CC)) cc-version = $(shell $(CONFIG_SHELL) $(srctree)/scripts/gcc-version.sh $(CC)) # cc-ifversion @@ -107,8 +107,8 @@ cc-ifversion = $(shell [ $(call cc-version, $(CC)) $(1) $(2) ] && echo $(3)) # ld-option # Usage: ldflags += $(call ld-option, -Wl$(comma)--hash-style=both) -ld-option = $(call checker-shell, \ - $(CC) $(1) -nostdlib -xc /dev/null -o $$OUT, $(1), $(2)) +ld-option = $(call checker-shell,\ + $(CC) $(1) -nostdlib -xc /dev/null -o $$OUT,$(1),$(2)) ###### @@ -120,22 +120,22 @@ build := -f $(if $(KBUILD_SRC),$(srctree)/)scripts/Makefile.build obj # Prefix -I with $(srctree) if it is not an absolute path, # add original to the end addtree = $(if \ - $(filter-out -I/%, $(1)), $(patsubst -I%,-I$(srctree)/%,$(1))) $(1) + $(filter-out -I/%,$(1)),$(patsubst -I%,-I$(srctree)/%,$(1))) $(1) # Find all -I options and call addtree -flags = $(foreach o,$($(1)), \ - $(if $(filter -I%,$(o)), $(call addtree, $(o)), $(o))) +flags = $(foreach o,$($(1)),\ + $(if $(filter -I%,$(o)),$(call addtree,$(o)),$(o))) # echo command. # Short version is used, if $(quiet) equals `quiet_', otherwise full one. -echo-cmd = $(if $($(quiet)cmd_$(1)), \ +echo-cmd = $(if $($(quiet)cmd_$(1)),\ echo ' $(call escsq,$($(quiet)cmd_$(1)))$(echo-why)';) # printing commands cmd = @$(echo-cmd) $(cmd_$(1)) # Add $(obj)/ for paths that are not absolute -objectify = $(foreach o,$(1), $(if $(filter /%,$(o)), $(o), $(obj)/$(o))) +objectify = $(foreach o,$(1),$(if $(filter /%,$(o)),$(o),$(obj)/$(o))) ### # if_changed - execute command if any prerequisite is newer than -- cgit v1.2.3 From c4184f117af7441fb83bc413d2214d92920e0289 Mon Sep 17 00:00:00 2001 From: Linus Torvalds Date: Wed, 7 Feb 2007 20:24:25 -0800 Subject: kbuild: make $(checker-shell ) strip spaces around the result It looks like GNU make version 3.80 (but apparently not 3.81) adds leading whitespace to the result of the checker-shell execution. This strips them off explicitly. Also, don't bother symlinking the output file to /dev/null. It's likely as expensive as just writing the temp-file, and we need to remove it anyway afterwards. Signed-off-by: Linus Torvalds --- scripts/Kbuild.include | 5 ++--- 1 file changed, 2 insertions(+), 3 deletions(-) (limited to 'scripts') diff --git a/scripts/Kbuild.include b/scripts/Kbuild.include index d65c40331e66..8d7eabf238c0 100644 --- a/scripts/Kbuild.include +++ b/scripts/Kbuild.include @@ -60,17 +60,16 @@ endef # Usage: option = $(call checker-shell,$(CC)...-o $$OUT,option-ok,otherwise) # Exit code chooses option. $$OUT is safe location for needless output. define checker-shell + $(strip $(shell set -e; \ DIR=$(KBUILD_EXTMOD); \ cd $${DIR:-$(objtree)}; \ OUT=$$PWD/.$$$$.null; \ - \ - ln -s /dev/null $$OUT; \ if $(1) >/dev/null 2>&1; \ then echo "$(2)"; \ else echo "$(3)"; \ fi; \ - rm -f $$OUT) + rm -f $$OUT)) endef # as-option -- cgit v1.2.3 From b892afd1e60132a981b963929e352eabf3306ba2 Mon Sep 17 00:00:00 2001 From: Linus Torvalds Date: Thu, 8 Feb 2007 08:16:44 -0800 Subject: kbuild: fix space for good (take 103) Michal Ostrowski points out what the real problem was: the spaces at the start of the definition of the 'checker-shell' make function. Cc: Michal Ostrowski Acked-by: David Miller Acked-by: Geert Uytterhoeven Acked-by: Oleg Verych Signed-off-by: Linus Torvalds --- scripts/Kbuild.include | 19 +++++++++---------- 1 file changed, 9 insertions(+), 10 deletions(-) (limited to 'scripts') diff --git a/scripts/Kbuild.include b/scripts/Kbuild.include index 8d7eabf238c0..a1880e854dce 100644 --- a/scripts/Kbuild.include +++ b/scripts/Kbuild.include @@ -60,16 +60,15 @@ endef # Usage: option = $(call checker-shell,$(CC)...-o $$OUT,option-ok,otherwise) # Exit code chooses option. $$OUT is safe location for needless output. define checker-shell - $(strip - $(shell set -e; \ - DIR=$(KBUILD_EXTMOD); \ - cd $${DIR:-$(objtree)}; \ - OUT=$$PWD/.$$$$.null; \ - if $(1) >/dev/null 2>&1; \ - then echo "$(2)"; \ - else echo "$(3)"; \ - fi; \ - rm -f $$OUT)) +$(shell set -e; \ + DIR=$(KBUILD_EXTMOD); \ + cd $${DIR:-$(objtree)}; \ + OUT=$$PWD/.$$$$.null; \ + if $(1) >/dev/null 2>&1; \ + then echo "$(2)"; \ + else echo "$(3)"; \ + fi; \ + rm -f $$OUT) endef # as-option -- cgit v1.2.3 From beda9f3a13bbb22cde92a45f230a02ef2afef6a9 Mon Sep 17 00:00:00 2001 From: Roman Zippel Date: Thu, 8 Feb 2007 22:48:51 +0100 Subject: [PATCH] kbuild: more Makefile cleanups This adds the remaining changes which should have been part of the review process. - the define command is inappropriate (it's primarily for rule definitions) - execute commands in the current dir as all other commands - .*.tmp (but not .*.null) files are also removed up by "make clean" - printf has other side effects, just use "echo -e" - proper quoting - proper indentation Signed-off-by: Roman Zippel Signed-off-by: Linus Torvalds --- scripts/Kbuild.include | 72 +++++++++++++++++++++++++------------------------- 1 file changed, 36 insertions(+), 36 deletions(-) (limited to 'scripts') diff --git a/scripts/Kbuild.include b/scripts/Kbuild.include index a1880e854dce..06c1a377c4c5 100644 --- a/scripts/Kbuild.include +++ b/scripts/Kbuild.include @@ -1,7 +1,7 @@ #### # kbuild: Generic definitions -# Convenient constants +# Convenient variables comma := , squote := ' empty := @@ -56,44 +56,48 @@ endef # gcc support functions # See documentation in Documentation/kbuild/makefiles.txt -# checker-shell -# Usage: option = $(call checker-shell,$(CC)...-o $$OUT,option-ok,otherwise) -# Exit code chooses option. $$OUT is safe location for needless output. -define checker-shell -$(shell set -e; \ - DIR=$(KBUILD_EXTMOD); \ - cd $${DIR:-$(objtree)}; \ - OUT=$$PWD/.$$$$.null; \ - if $(1) >/dev/null 2>&1; \ - then echo "$(2)"; \ - else echo "$(3)"; \ - fi; \ - rm -f $$OUT) -endef +# output directory for tests below +TMPOUT := $(if $(KBUILD_EXTMOD),$(firstword $(KBUILD_EXTMOD))/) + +# try-run +# Usage: option = $(call try-run, $(CC)...-o "$$TMP",option-ok,otherwise) +# Exit code chooses option. "$$TMP" is can be used as temporary file and +# is automatically cleaned up. +try-run = $(shell set -e; \ + TMP="$(TMPOUT).$$$$.tmp"; \ + if ($(1)) >/dev/null 2>&1; \ + then echo "$(2)"; \ + else echo "$(3)"; \ + fi; \ + rm -f "$$TMP") # as-option # Usage: cflags-y += $(call as-option,-Wa$(comma)-isa=foo,) -as-option = $(call checker-shell,\ - $(CC) $(CFLAGS) $(1) -c -xassembler /dev/null -o $$OUT,$(1),$(2)) + +as-option = $(call try-run,\ + $(CC) $(CFLAGS) $(1) -c -xassembler /dev/null -o "$$TMP",$(1),$(2)) # as-instr # Usage: cflags-y += $(call as-instr,instr,option1,option2) -as-instr = $(call checker-shell,\ - printf "$(1)" | $(CC) $(AFLAGS) -c -xassembler -o $$OUT -,$(2),$(3)) + +as-instr = $(call try-run,\ + echo -e "$(1)" | $(CC) $(AFLAGS) -c -xassembler -o "$$TMP" -,$(2),$(3)) # cc-option # Usage: cflags-y += $(call cc-option,-march=winchip-c6,-march=i586) -cc-option = $(call checker-shell,\ - $(CC) $(CFLAGS) $(if $(3),$(3),$(1)) -S -xc /dev/null -o $$OUT,$(1),$(2)) + +cc-option = $(call try-run,\ + $(CC) $(CFLAGS) $(1) -S -xc /dev/null -o "$$TMP",$(1),$(2)) # cc-option-yn # Usage: flag := $(call cc-option-yn,-march=winchip-c6) -cc-option-yn = $(call cc-option,"y","n",$(1)) +cc-option-yn = $(call try-run,\ + $(CC) $(CFLAGS) $(1) -S -xc /dev/null -o "$$TMP",y,n) # cc-option-align # Prefix align with either -falign or -malign cc-option-align = $(subst -functions=0,,\ - $(call cc-option,-falign-functions=0,-malign-functions=0)) + $(call cc-option,-falign-functions=0,-malign-functions=0)) # cc-version # Usage gcc-ver := $(call cc-version,$(CC)) @@ -105,24 +109,22 @@ cc-ifversion = $(shell [ $(call cc-version, $(CC)) $(1) $(2) ] && echo $(3)) # ld-option # Usage: ldflags += $(call ld-option, -Wl$(comma)--hash-style=both) -ld-option = $(call checker-shell,\ - $(CC) $(1) -nostdlib -xc /dev/null -o $$OUT,$(1),$(2)) +ld-option = $(call try-run,\ + $(CC) $(1) -nostdlib -xc /dev/null -o "$$TMP",$(1),$(2)) ###### +### # Shorthand for $(Q)$(MAKE) -f scripts/Makefile.build obj= # Usage: # $(Q)$(MAKE) $(build)=dir build := -f $(if $(KBUILD_SRC),$(srctree)/)scripts/Makefile.build obj -# Prefix -I with $(srctree) if it is not an absolute path, -# add original to the end -addtree = $(if \ - $(filter-out -I/%,$(1)),$(patsubst -I%,-I$(srctree)/%,$(1))) $(1) +# Prefix -I with $(srctree) if it is not an absolute path. +addtree = $(if $(filter-out -I/%,$(1)),$(patsubst -I%,-I$(srctree)/%,$(1))) $(1) # Find all -I options and call addtree -flags = $(foreach o,$($(1)),\ - $(if $(filter -I%,$(o)),$(call addtree,$(o)),$(o))) +flags = $(foreach o,$($(1)),$(if $(filter -I%,$(o)),$(call addtree,$(o)),$(o))) # echo command. # Short version is used, if $(quiet) equals `quiet_', otherwise full one. @@ -144,7 +146,7 @@ objectify = $(foreach o,$(1),$(if $(filter /%,$(o)),$(o),$(obj)/$(o))) # See Documentation/kbuild/makefiles.txt for more info ifneq ($(KBUILD_NOCMDDEP),1) -# Check if both arguments has same arguments. Result is empty string, if equal. +# Check if both arguments has same arguments. Result is empty string if equal. # User may override this check using make KBUILD_NOCMDDEP=1 arg-check = $(strip $(filter-out $(cmd_$(1)), $(cmd_$@)) \ $(filter-out $(cmd_$@), $(cmd_$(1))) ) @@ -168,7 +170,6 @@ if_changed = $(if $(strip $(any-prereq) $(arg-check)), \ echo 'cmd_$@ := $(make-cmd)' > $(dot-target).cmd) # Execute the command and also postprocess generated .d dependencies file. -# if_changed_dep = $(if $(strip $(any-prereq) $(arg-check) ), \ @set -e; \ $(echo-cmd) $(cmd_$(1)); \ @@ -176,10 +177,9 @@ if_changed_dep = $(if $(strip $(any-prereq) $(arg-check) ), \ rm -f $(depfile); \ mv -f $(dot-target).tmp $(dot-target).cmd) -# Will check if $(cmd_foo) changed, or any of the prerequisites changed, -# and if so will execute $(rule_foo). # Usage: $(call if_changed_rule,foo) -# +# Will check if $(cmd_foo) or any of the prerequisites changed, +# and if so will execute $(rule_foo). if_changed_rule = $(if $(strip $(any-prereq) $(arg-check) ), \ @set -e; \ $(rule_$(1))) -- cgit v1.2.3