| Message ID | 1495194150-14016-1-git-send-email-yamada.masahiro@socionext.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
2017-05-19 20:42 GMT+09:00 Masahiro Yamada <yamada.masahiro@socionext.com>: > 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 be 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 > > The idea to cater to all the cases more easily is to filter out long > options (--%), then search 's' with $(findstring ...). This way will > be more future-proof even if Make 5.x decides to put 's' in the middle > of the group. > > Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com> Applied to linux-kbuild/kbuild.
diff --git a/Makefile b/Makefile index b1ee4a49efa2..e4da5a0ccf97 100644 --- a/Makefile +++ b/Makefile @@ -84,17 +84,10 @@ endif # If the user is running make -s (silent mode), suppress echoing of # commands -ifneq ($(filter 4.%,$(MAKE_VERSION)),) # make-4 -ifneq ($(filter %s ,$(firstword x$(MAKEFLAGS))),) +ifneq ($(findstring s,$(filter-out --%,$(MAKEFLAGS))),) quiet=silent_ tools_silent=s endif -else # make-3.8x -ifneq ($(filter s% -s%,$(MAKEFLAGS)),) - quiet=silent_ - tools_silent=-s -endif -endif export quiet Q KBUILD_VERBOSE diff --git a/tools/build/Makefile.build b/tools/build/Makefile.build index e279a71c650d..c46b20e4ad87 100644 --- a/tools/build/Makefile.build +++ b/tools/build/Makefile.build @@ -19,15 +19,9 @@ else Q=@ endif -ifneq ($(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
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 be 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 The 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 Make 5.x decides to put 's' in the middle of the group. Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com> --- Changes in v3: - Even simpler way that works in any order. Changes in v2: - Fix makefiles under tools as well Makefile | 9 +-------- tools/build/Makefile.build | 8 +------- tools/scripts/Makefile.include | 8 +------- 3 files changed, 3 insertions(+), 22 deletions(-)