Masahiro Yamada 392885ee82 kbuild: let fixdep directly write to .*.cmd files ... Currently, fixdep writes dependencies to .*.tmp, which is renamed to .*.cmd after everything succeeds. This is a very safe way to avoid corrupted .*.cmd files. The if_changed_dep has carried this safety mechanism since it was added in 2002. If fixdep fails for some reasons or a user terminates the build while fixdep is running, the incomplete output from the fixdep could be troublesome. This is my insight about some bad scenarios: [1] If the compiler succeeds to generate *.o file, but fixdep fails to write necessary dependencies to .*.cmd file, Make will miss to rebuild the object when headers or CONFIG options are changed. In this case, fixdep should not generate .*.cmd file at all so that 'arg-check' will surely trigger the rebuild of the object. [2] A partially constructed .*.cmd file may not be a syntactically correct makefile. The next time Make runs, it would include it, then fail to parse it. Once this happens, 'make clean' is be the only way to fix it. In fact, [1] is no longer a problem since commit 9c2af1c737 ("kbuild: add .DELETE_ON_ERROR special target"). Make deletes a target file on any failure in its recipe. Because fixdep is a part of the recipe of *.o target, if it fails, the *.o is deleted anyway. However, I am a bit worried about the slight possibility of [2]. So, here is a solution. Let fixdep directly write to a .*.cmd file, but allow makefiles to include it only when its corresponding target exists. This effectively reverts commit 2982c95357 ("kbuild: remove redundant $(wildcard ...) for cmd_files calculation"), and commit 00d78ab2ba ("kbuild: remove dead code in cmd_files calculation in top Makefile") because now we must check the presence of targets. Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>		2018-12-01 23:13:14 +09:00
..
basic	kbuild: move bin2c back to scripts/ from scripts/basic/	2018-07-18 01:18:05 +09:00
coccinelle	Coccinelle: remove pci_alloc_consistent semantic to detect in zalloc-simple.cocci	2018-08-22 23:21:43 +09:00
dtc	Merge branch 'all-dtbs' into dt/next	2018-10-04 14:16:15 -05:00
gcc-plugins	stackleak: Allow runtime disabling of kernel stack erasing	2018-09-04 10:35:48 -07:00
gdb	scripts/gdb/linux/tasks.py: fix get_thread_info	2018-01-19 10:09:41 -08:00
genksyms	genksyms: remove symbol prefix support	2018-05-17 22:43:35 +09:00
kconfig	kconfig: merge_config: avoid false positive matches from comment lines	2018-11-11 23:04:51 +09:00
ksymoops
mod	kbuild: move modpost out of 'scripts' target	2018-12-01 23:09:34 +09:00
package	builddeb: Fix inclusion of dtbs in debian package	2018-11-11 23:04:53 +09:00
selinux	staging: lustre: delete the filesystem from the tree.	2018-06-05 19:22:35 +02:00
tracing	scripts: Add Python 3 support to tracing/draw_functrace.py	2018-07-29 11:08:38 +09:00
.gitignore	kbuild: move bin2c back to scripts/ from scripts/basic/	2018-07-18 01:18:05 +09:00
adjust_autoksyms.sh	kbuild: remove CONFIG_HAVE_UNDERSCORE_SYMBOL_PREFIX	2018-05-17 22:44:57 +09:00
asn1_compiler.c	ASN.1: Remove unnecessary shadowed local variable	2018-10-29 00:19:41 +09:00
bin2c.c	kbuild: move bin2c back to scripts/ from scripts/basic/	2018-07-18 01:18:05 +09:00
bloat-o-meter	syscalls/core, syscalls/x86: Clean up compat syscall stub naming convention	2018-04-09 16:47:28 +02:00
bootgraph.pl
bpf_helpers_doc.py	bpf: change eBPF helper doc parsing script to allow for smaller indent	2018-05-17 17:34:43 +02:00
cc-can-link.sh	bpfilter: check compiler capability in Kconfig	2018-06-28 13:36:39 +09:00
check_extable.sh
checkincludes.pl
checkkconfigsymbols.py
checkpatch.pl	checkpatch: remove GCC_BINARY_CONSTANT warning	2018-10-31 08:54:13 -07:00
checkstack.pl	scripts: Add ppc64le support for checkstack.pl	2018-07-02 23:54:28 +10:00
checksyscalls.sh
checkversion.pl
clang-version.sh	kbuild: Add a space after ! to prevent parsing as file pattern	2018-08-22 23:21:40 +09:00
cleanfile
cleanpatch
coccicheck	coccicheck: return proper error code on fail	2018-08-14 08:58:56 +09:00
config
conmakehash.c
const_structs.checkpatch
decode_stacktrace.sh
decodecode	scripts/decodecode: make it take multiline Code line	2018-01-31 17:18:34 -08:00
depmod.sh	kbuild: modules_install: warn when missing System.map file	2018-09-09 09:14:07 +09:00
diffconfig
documentation-file-ref-check	scripts/documentation-file-ref-check: ignore sched-pelt false positive	2018-07-02 11:25:00 -06:00
export_report.pl
extract_xc3028.pl	MAINTAINERS & files: Canonize the e-mails I use at files	2018-05-04 06:21:06 -04:00
extract-cert.c
extract-ikconfig
extract-module-sig.pl
extract-sys-certs.pl
extract-vmlinux	extract-vmlinux: Check for uncompressed image as fallback	2018-10-17 08:18:01 +02:00
faddr2line	scripts/faddr2line: make the new code listing format optional	2018-06-05 09:04:37 -07:00
file-size.sh	kbuild: Use ls(1) instead of stat(1) to obtain file size	2018-03-26 02:01:24 +09:00
find-unused-docs.sh
gcc-goto.sh
gcc-ld
gcc-plugin.sh
gcc-version.sh
gcc-x86_32-has-stack-protector.sh	stack-protector: test compiler capability in Kconfig and drop AUTO mode	2018-06-08 18:56:00 +09:00
gcc-x86_64-has-stack-protector.sh	stack-protector: Fix test with 32-bit userland and CONFIG_64BIT=y	2018-06-25 23:21:13 +09:00
get_dvb_firmware
get_maintainer.pl	get_maintainer: allow option --mpath <directory> to read all files in <directory>	2018-08-22 10:52:48 -07:00
gfp-translate
headerdep.pl
headers_check.pl
headers_install.sh	kbuild: Improve portability of some sed invocations	2018-03-26 02:01:18 +09:00
headers.sh
insert-sys-cert.c
kallsyms.c	kallsyms: remove left-over Blackfin code	2018-09-10 22:54:33 +09:00
Kbuild.include	kbuild: let fixdep directly write to .*.cmd files	2018-12-01 23:13:14 +09:00
Kconfig.include	gcc-plugins: test plugin support in Kconfig and clean up Makefile	2018-06-11 09:16:22 +09:00
kernel-doc	kernel-doc: fix declaration type determination	2018-10-18 12:20:35 -06:00
ld-version.sh
leaking_addresses.pl	leaking_addresses: check if file name contains address	2018-04-07 08:50:34 +10:00
Lindent
link-vmlinux.sh	kbuild: rename LDFLAGS to KBUILD_LDFLAGS	2018-08-24 08:22:08 +09:00
Makefile	kbuild: descend into scripts/gcc-plugins/ via scripts/Makefile	2018-12-01 23:09:38 +09:00
Makefile.asm-generic	Kbuild updates for v4.15	2017-11-17 17:45:29 -08:00
Makefile.build	kbuild: let fixdep directly write to .*.cmd files	2018-12-01 23:13:14 +09:00
Makefile.clean	kbuild: remove deprecated host-progs variable	2018-08-09 21:51:17 +09:00
Makefile.dtbinst	DeviceTree for 4.15:	2017-11-14 18:25:40 -08:00
Makefile.extrawarn	Kbuild updates for v4.20 (2nd)	2018-11-03 10:47:33 -07:00
Makefile.gcc-plugins	kbuild: descend into scripts/gcc-plugins/ via scripts/Makefile	2018-12-01 23:09:38 +09:00
Makefile.headersinst	Kbuild updates for v4.15	2017-11-17 17:45:29 -08:00
Makefile.host	kbuild: Rename HOST_LOADLIBES to KBUILD_HOSTLDLIBS	2018-07-18 01:18:05 +09:00
Makefile.kasan	kasan: rework Kconfig settings	2018-02-06 18:32:47 -08:00
Makefile.kcov	kcov: test compiler capability in Kconfig and correct dependency	2018-06-11 09:14:08 +09:00
Makefile.lib	kbuild: consolidate Devicetree dtb build rules	2018-10-02 09:23:21 -05:00
Makefile.modbuiltin	Kbuild: Makefile.modbuiltin: include auto.conf and tristate.conf mandatory	2018-08-03 00:47:00 +09:00
Makefile.modinst	kbuild: remove duplicated comments about PHONY	2018-07-06 22:04:03 +09:00
Makefile.modpost	kbuild: rename LDFLAGS to KBUILD_LDFLAGS	2018-08-24 08:22:08 +09:00
Makefile.modsign	kbuild: remove duplicated comments about PHONY	2018-07-06 22:04:03 +09:00
Makefile.ubsan	lib/ubsan: remove null-pointer checks	2018-08-10 20:19:58 -07:00
makelst
markup_oops.pl
mkcompile_h	Kbuild updates for v4.15	2017-11-17 17:45:29 -08:00
mkmakefile	kbuild: simplify command line creation in scripts/mkmakefile	2018-10-04 22:56:02 +09:00
mksysmap
mkuboot.sh
module-common.lds
namespace.pl	kbuild: rename built-in.o to built-in.a	2018-03-26 02:01:19 +09:00
objdiff
parse-maintainers.pl	parse-maintainers: add ability to specify filenames	2017-11-17 16:10:01 -08:00
patch-kernel
pnmtologo.c
profile2linkerlist.pl
prune-kernel
recordmcount.c	scripts: Fixed printf format mismatch	2018-05-29 22:04:12 +09:00
recordmcount.h	scripts: Fixed printf format mismatch	2018-05-29 22:04:12 +09:00
recordmcount.pl	nds32/ftrace: Add RECORD_MCOUNT support	2018-09-04 14:45:18 +08:00
setlocalversion	scripts/setlocalversion: Improve -dirty check with git-status --no-optional-locks	2018-11-21 23:57:33 +09:00
show_delta
sign-file.c
sortextable.c
sortextable.h
spdxcheck.py	scripts: add Python 3 compatibility to spdxcheck.py	2018-08-17 16:20:27 -07:00
spelling.txt	treewide: correct "differenciate" and "instanciate" typos	2018-08-23 18:48:43 -07:00
sphinx-pre-install
split-man.pl	MAINTAINERS & files: Canonize the e-mails I use at files	2018-05-04 06:21:06 -04:00
stackdelta
stackusage
subarch.include	selftests: add headers_install to lib.mk	2018-09-05 08:12:09 -06:00
tags.sh	scripts/tags.sh: add DECLARE_HASHTABLE()	2018-10-26 16:25:18 -07:00
unifdef.c
ver_linux	ver_linux: Do not check for ver_linux pattern in version function	2018-07-07 17:44:52 +02:00
xen-hypercalls.sh
xz_wrap.sh