lkml.org 
[lkml]   [2018]   [Apr]   [15]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
From
Date
SubjectRe: [PATCH 20/30] kconfig: add basic helper macros to scripts/Kconfig.include
2018-04-15 16:41 GMT+09:00 Ulf Magnusson <ulfalizer@gmail.com>:
> On Fri, Apr 13, 2018 at 7:06 AM, Masahiro Yamada
> <yamada.masahiro@socionext.com> wrote:
>> Kconfig got text processing tools like we see in Make. Add Kconfig
>> helper macros to scripts/Kconfig.include like we collect Makefile
>> macros in scripts/Kbuild.include.
>>
>> Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
>> Reviewed-by: Kees Cook <keescook@chromium.org>
>> Reviewed-by: Ulf Magnusson <ulfalizer@gmail.com>
>> ---
>>
>> Changes in v3:
>> - Move helpers to scripts/Kconfig.include
>>
>> Changes in v2: None
>>
>> Kconfig | 2 ++
>> MAINTAINERS | 1 +
>> scripts/Kconfig.include | 17 +++++++++++++++++
>> 3 files changed, 20 insertions(+)
>> create mode 100644 scripts/Kconfig.include
>>
>> diff --git a/Kconfig b/Kconfig
>> index 5b55d87..a90d9f9 100644
>> --- a/Kconfig
>> +++ b/Kconfig
>> @@ -7,4 +7,6 @@ mainmenu "Linux/$(ARCH) $(KERNELVERSION) Kernel Configuration"
>>
>> comment "Compiler: $(CC_VERSION_TEXT)"
>>
>> +source "scripts/Kconfig.include"
>> +
>> source "arch/$(SRCARCH)/Kconfig"
>> diff --git a/MAINTAINERS b/MAINTAINERS
>> index b9dab38..d962f4a 100644
>> --- a/MAINTAINERS
>> +++ b/MAINTAINERS
>> @@ -7624,6 +7624,7 @@ L: linux-kbuild@vger.kernel.org
>> S: Maintained
>> F: Documentation/kbuild/kconfig*
>> F: scripts/kconfig/
>> +F: scripts/Kconfig.include
>>
>> KDUMP
>> M: Dave Young <dyoung@redhat.com>
>> diff --git a/scripts/Kconfig.include b/scripts/Kconfig.include
>> new file mode 100644
>> index 0000000..cac7a81
>> --- /dev/null
>> +++ b/scripts/Kconfig.include
>> @@ -0,0 +1,17 @@
>> +# Kconfig helper macros
>> +
>> +# Convenient variables
>> +comma := ,
>> +quote := "
>> +squote := '
>> +empty :=
>> +space := $(empty) $(empty)
>> +
>> +# y if the command exits with 0, n otherwise
>> +success = $(shell ($(1)) >/dev/null 2>&1 && echo y || echo n)
>
> '{ $(1); }' might work here, to avoid the extra subshell.
>
> Shaves 20-30% off the runtime here in a silly
> system("(true) >/dev/null 2>&1 && echo y || echo n") vs.
> system("{ true; } >/dev/null 2>&1 && echo y || echo n")
> comparison.


You are right. Will do so in the next version.






--
Best Regards
Masahiro Yamada

\
 
 \ /
  Last update: 2018-04-15 17:04    [W:0.042 / U:13.628 seconds]
©2003-2018 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site