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Linus Torvalds 09bd7c75e5 Kbuild updates for v4.15
One of the most remarkable improvements in this cycle is, Kbuild is
 now able to cache the result of shell commands.  Some variables are
 expensive to compute, for example, $(call cc-option,...) invokes the
 compiler.  It is not efficient to redo this computation every time,
 even when we are not actually building anything.  Kbuild creates a
 hidden file ".cache.mk" that contains invoked shell commands and
 their results.  The speed-up should be noticeable.
 
 Summary:
 
 - Fix arch build issues (hexagon, sh)
 
 - Clean up various Makefiles and scripts
 
 - Fix wrong usage of {CFLAGS,LDFLAGS}_MODULE in arch Makefiles
 
 - Cache variables that are expensive to compute
 
 - Improve cc-ldopton and ld-option for Clang
 
 - Optimize output directory creation
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Merge tag 'kbuild-v4.15' of git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild

Pull Kbuild updates from Masahiro Yamada:
 "One of the most remarkable improvements in this cycle is, Kbuild is
  now able to cache the result of shell commands. Some variables are
  expensive to compute, for example, $(call cc-option,...) invokes the
  compiler. It is not efficient to redo this computation every time,
  even when we are not actually building anything. Kbuild creates a
  hidden file ".cache.mk" that contains invoked shell commands and their
  results. The speed-up should be noticeable.

  Summary:

   - Fix arch build issues (hexagon, sh)

   - Clean up various Makefiles and scripts

   - Fix wrong usage of {CFLAGS,LDFLAGS}_MODULE in arch Makefiles

   - Cache variables that are expensive to compute

   - Improve cc-ldopton and ld-option for Clang

   - Optimize output directory creation"

* tag 'kbuild-v4.15' of git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild: (30 commits)
  kbuild: move coccicheck help from scripts/Makefile.help to top Makefile
  sh: decompressor: add shipped files to .gitignore
  frv: .gitignore: ignore vmlinux.lds
  selinux: remove unnecessary assignment to subdir-
  kbuild: specify FORCE in Makefile.headersinst as .PHONY target
  kbuild: remove redundant mkdir from ./Kbuild
  kbuild: optimize object directory creation for incremental build
  kbuild: create object directories simpler and faster
  kbuild: filter-out PHONY targets from "targets"
  kbuild: remove redundant $(wildcard ...) for cmd_files calculation
  kbuild: create directory for make cache only when necessary
  sh: select KBUILD_DEFCONFIG depending on ARCH
  kbuild: fix linker feature test macros when cross compiling with Clang
  kbuild: shrink .cache.mk when it exceeds 1000 lines
  kbuild: do not call cc-option before KBUILD_CFLAGS initialization
  kbuild: Cache a few more calls to the compiler
  kbuild: Add a cache for generated variables
  kbuild: add forward declaration of default target to Makefile.asm-generic
  kbuild: remove KBUILD_SUBDIR_ASFLAGS and KBUILD_SUBDIR_CCFLAGS
  hexagon/kbuild: replace CFLAGS_MODULE with KBUILD_CFLAGS_MODULE
  ...
2017-11-17 17:45:29 -08:00
..
.gitignore frv: .gitignore: ignore vmlinux.lds 2017-11-17 00:33:08 +09:00
Makefile License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
asm-offsets.c License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
break.S Rename special text sections in arch/frv from .text.XXX to .text..XXX. 2010-03-03 11:26:01 +01:00
cmode.S Fix various old email addresses for dwmw2 2008-06-06 11:29:10 -07:00
debug-stub.c Disintegrate asm/system.h for FRV 2012-03-28 18:30:02 +01:00
dma.c frv: Rewrite atomic implementation 2015-07-27 14:06:23 +02:00
entry-table.S Fix common misspellings 2011-03-31 11:26:23 -03:00
entry.S frv: fix the broken preempt 2012-11-02 12:08:25 -04:00
frv_ksyms.c License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
futex.c futex: Remove duplicated code and fix undefined behaviour 2017-08-25 22:49:59 +02:00
gdb-io.c Disintegrate asm/system.h for FRV 2012-03-28 18:30:02 +01:00
gdb-io.h Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
gdb-stub.c Disintegrate asm/system.h for FRV 2012-03-28 18:30:02 +01:00
head-mmu-fr451.S FRV: Use __INIT macro instead of .text.init. 2009-04-27 19:46:30 -07:00
head-uc-fr401.S FRV: Use __INIT macro instead of .text.init. 2009-04-27 19:46:30 -07:00
head-uc-fr451.S FRV: Use __INIT macro instead of .text.init. 2009-04-27 19:46:30 -07:00
head-uc-fr555.S FRV: Use __INIT macro instead of .text.init. 2009-04-27 19:46:30 -07:00
head.S frv: head.S - Remove commented-out initialization code 2013-06-16 13:47:47 +02:00
head.inc FRV: Make NOMMU-mode work with base addresses other than 0xC0000000 [try #2] 2008-04-10 13:41:29 -07:00
irq-mb93091.c frv: remove deprecated IRQF_DISABLED 2014-10-09 22:26:03 -04:00
irq-mb93093.c frv: remove deprecated IRQF_DISABLED 2014-10-09 22:26:03 -04:00
irq-mb93493.c frv: remove deprecated IRQF_DISABLED 2014-10-09 22:26:03 -04:00
irq.c Replace <asm/uaccess.h> with <linux/uaccess.h> globally 2016-12-24 11:46:01 -08:00
local.h [PATCH] FRV: Fix FRV arch compile errors 2006-07-10 13:24:21 -07:00
local64.h arch: Implement local64_t 2010-06-09 11:12:36 +02:00
module.c modules: make arch's use default loader hooks 2011-07-24 22:06:04 +09:30
pm-mb93093.c Replace <asm/uaccess.h> with <linux/uaccess.h> globally 2016-12-24 11:46:01 -08:00
pm.c Replace <asm/uaccess.h> with <linux/uaccess.h> globally 2016-12-24 11:46:01 -08:00
process.c arch: remove unused macro/function thread_saved_pc() 2017-06-28 16:13:57 -07:00
ptrace.c Replace <asm/uaccess.h> with <linux/uaccess.h> globally 2016-12-24 11:46:01 -08:00
setup.c frv: remove unused cpuinfo_frv and friends to fix future build error 2014-10-09 22:26:03 -04:00
signal.c Replace <asm/uaccess.h> with <linux/uaccess.h> globally 2016-12-24 11:46:01 -08:00
sleep.S Fix various old email addresses for dwmw2 2008-06-06 11:29:10 -07:00
switch_to.S FRV: Make NOMMU-mode work with base addresses other than 0xC0000000 [try #2] 2008-04-10 13:41:29 -07:00
sys_frv.c Replace <asm/uaccess.h> with <linux/uaccess.h> globally 2016-12-24 11:46:01 -08:00
sysctl.c Replace <asm/uaccess.h> with <linux/uaccess.h> globally 2016-12-24 11:46:01 -08:00
time.c frv: remove deprecated IRQF_DISABLED 2014-10-09 22:26:03 -04:00
traps.c frv: switch to use of fixup_exception() 2017-03-28 18:23:32 -04:00
uaccess.c Replace <asm/uaccess.h> with <linux/uaccess.h> globally 2016-12-24 11:46:01 -08:00
vmlinux.lds.S License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00