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| author | Masahiro Yamada <yamada.masahiro@socionext.com> | 2017-05-19 13:42:30 +0200 |
|---|---|---|
| committer | Masahiro Yamada <yamada.masahiro@socionext.com> | 2017-06-06 02:01:12 +0200 |
| commit | 6f0fa58e459642b16901521cc58ac474b787ec5b (patch) | |
| tree | c7310820bb5745c1eb9475500b64e921262c6c0b /tools | |
| parent | Linux 4.12-rc2 (diff) | |
| download | linux-6f0fa58e459642b16901521cc58ac474b787ec5b.tar.xz linux-6f0fa58e459642b16901521cc58ac474b787ec5b.zip | |
kbuild: simplify silent build (-s) detection
This allows to detect -s (--silent) option without checking GNU Make
version.
As commit e36aaea28972 ("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 e6ac89fabd03 ("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 $(findstring ...). This way will
be more future-proof even if future versions of Make put 's' in the
middle of the group.
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Diffstat (limited to 'tools')
| -rw-r--r-- | tools/build/Makefile.build | 8 | ||||
| -rw-r--r-- | tools/scripts/Makefile.include | 8 |
2 files changed, 2 insertions, 14 deletions
diff --git a/tools/build/Makefile.build b/tools/build/Makefile.build index e279a71c650d..c46b20e4ad87 100644 --- a/tools/build/Makefile.build +++ b/tools/build/Makefile.build @@ -19,15 +19,9 @@ else Q=@ endif -ifneq ($(filter 4.%,$(MAKE_VERSION)),) # make-4 -ifneq ($(filter %s ,$(firstword x$(MAKEFLAGS))),) +ifneq ($(findstring s,$(filter-out --%,$(MAKEFLAGS))),) quiet=silent_ endif -else # make-3.8x -ifneq ($(filter s% -s%,$(MAKEFLAGS)),) - quiet=silent_ -endif -endif build-dir := $(srctree)/tools/build diff --git a/tools/scripts/Makefile.include b/tools/scripts/Makefile.include index fc74db62fef4..ccad8ce925e4 100644 --- a/tools/scripts/Makefile.include +++ b/tools/scripts/Makefile.include @@ -58,15 +58,9 @@ else NO_SUBDIR = : endif -ifneq ($(filter 4.%,$(MAKE_VERSION)),) # make-4 -ifneq ($(filter %s ,$(firstword x$(MAKEFLAGS))),) +ifneq ($(findstring s,$(filter-out --%,$(MAKEFLAGS))),) silent=1 endif -else # make-3.8x -ifneq ($(filter s% -s%,$(MAKEFLAGS)),) - silent=1 -endif -endif # # Define a callable command for descending to a new directory |