Masahiro Yamada 6f0fa58e45 kbuild: simplify silent build (-s) detection ... This allows to detect -s (--silent) option without checking GNU Make version. As commit e36aaea289 ("kbuild: Fix silent builds with make-4") pointed out, GNU Make 4.x changed the way/order it presents the command line options into MAKEFLAGS. In Make 3.8x, 's' is always the first in a group of short options. The group may be prefixed with '-' in some cases. In Make 4.x, 's' is always the last in a group of short options. As commit e6ac89fabd ("kbuild: Correctly deal with make options which contain an 's'") addressed, we also need to deal with long options that contain 's', like --warn-undefined-variables. Test cases: [1] command line input: make --silent -> MAKEFLAGS for Make 3.8x: s -> MAKEFLAGS for Make 4.x : s [2] command line input: make -srR -> MAKEFLAGS for Make 3.8x: sRr -> MAKEFLAGS for Make 4.x : rRs [3] command line input: make -s -rR --warn-undefined-variables -> MAKEFLAGS for Make 3.8x: --warn-undefined-variables -sRr -> MAKEFLAGS for Make 4.x : rRs --warn-undefined-variables My idea to cater to all the cases more easily is to filter out long options (--%), then search 's' with $(findstring ...). This way will be more future-proof even if future versions of Make put 's' in the middle of the group. Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>		2017-06-06 09:01:12 +09:00
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Documentation	tools build: Add CFLAGS_REMOVE_* support	2016-11-14 11:37:25 -03:00
feature	Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net	2017-05-15 15:50:49 -07:00
tests	tools build: Build fixdep helper from perf and basic libs	2015-09-28 15:50:55 -03:00
.gitignore	perf build: Add fixdep to .gitignore	2015-10-20 10:43:28 -03:00
Build	tools build: Make fixdep a hostprog	2016-10-03 11:40:35 -03:00
Build.include	tools build: Move tabs to spaces where suitable	2016-12-05 16:06:03 -03:00
fixdep.c	tools build: Make fixdep parsing wait for last target	2016-12-05 15:51:42 -03:00
Makefile	perf build: Add special fixdep cleaning rule	2017-02-17 16:04:38 -03:00
Makefile.build	kbuild: simplify silent build (-s) detection	2017-06-06 09:01:12 +09:00
Makefile.feature	tools build: Add test for sched_getcpu()	2017-03-03 19:07:19 -03:00
Makefile.include	perf build: Add special fixdep cleaning rule	2017-02-17 16:04:38 -03:00