Re: [PATCH] Makefile: allow no update .config build

Randy Dunlap
2013-03-28T18:14:04Z

On 03/28/13 00:28, liguang wrote:
> if we pull some commits from other git repo
> which bring in a few CONFIG_* options, then
> we have to build all again, but we do assure
> these options are not interesting for us,
> so the long waiting build will be offending.
> this change help us to avoid all-build.
>
> Signed-off-by: liguang <lig.fnst@cn.fujitsu.com>
> ---
> Makefile | 9 +++++++++
> 1 files changed, 9 insertions(+), 0 deletions(-)
>
> diff --git a/Makefile b/Makefile
> index 54d2b2a..d10e505 100644
> --- a/Makefile
> +++ b/Makefile
> @@ -106,6 +106,12 @@ ifeq ("$(origin W)", "command line")
> export KBUILD_ENABLE_EXTRA_GCC_CHECKS := $(W)
> endif
>
> +# KBUILD_NCU is set to do not update .config even
> +# a few new CONFIG_* options appeared
> +ifeq ("$(origin NCU)", "command line")
> + KBUILD_NCU := $(NCU)
> +endif
> +
> # That's our default target when none is given on the command line
> PHONY := _all
> _all:
> @@ -540,8 +546,10 @@ $(KCONFIG_CONFIG) include/config/auto.conf.cmd: ;
> # with it and forgot to run make oldconfig.
> # if auto.conf.cmd is missing then we are probably in a cleaned tree so
> # we execute the config step to be sure to catch updated Kconfig files
> +ifneq ($(KBUILD_NCU), 1)
> include/config/%.conf: $(KCONFIG_CONFIG) include/config/auto.conf.cmd
> $(Q)$(MAKE) -f $(srctree)/Makefile silentoldconfig
> +endif # $(KBUILD_NCU)
> else
> # external modules needs include/generated/autoconf.h and include/config/auto.conf
> # but do not care if they are up-to-date. Use auto.conf to trigger the test
> @@ -1157,6 +1165,7 @@ help:
> @echo ' 2: warnings which occur quite often but may still be relevant'
> @echo ' 3: more obscure warnings, can most likely be ignored'
> @echo ' Multiple levels can be combined with W=12 or W=123'
> + @echo ' make NCU=1 [targets] no .config udate'

update

> @echo ''
> @echo 'Execute "make" or "make all" to build all targets marked with [*] '
> @echo 'For further info see the ./README file'
>

--
~Randy