[Buildroot] [PATCH v10 7/8] package: enable jobserver for recursive make

[Arnout Vandecappelle <arnout@mind.be>]

On 20/12/13 14:24, Fabio Porcedda wrote:
> On Thu, Dec 19, 2013 at 6:27 PM, Arnout Vandecappelle <arnout@mind.be> wrote:
>> On 18/12/13 11:36, Fabio Porcedda wrote:
>>>
>>> Add '+' prefix to the $($(PKG)_BUILD_CMDS) and $($(PKG)_INSTALL*_CMDS)
>>> commands to enable jobserver for the sub-make.
>>>
>>> Without the '+' prefix GNU make does not detect the sub-make so it
>>> disable the jobserver for the sub-make.
>>
>>
>>   $(PKG)_BUILD_CMDS is a multiline define, and the recursive make call may
>> not be the first command. Can you check if this still works if the build
>> commands are something like:
>>
>> define FOO_BUILD_CMDS
>>          echo "Hello world!"
>>          $(MAKE) -C $(@D)
>> endef
>
> The following test seems to work fine:

  OK, good!

  Regards,
  Arnout

>
> define test
>      echo test
>      $($(PKG)_BUILD_CMDS)
> endef
>
> # Build
> $(BUILD_DIR)/%/.stamp_built::
>      @$(call step_start,build)
>      @$(call MESSAGE,"Building")
>      +$(test)
>      ...
>
> Test output:
> -----
> $ make BR2_JLEVEL= -j$((`getconf _NPROCESSORS_ONLN`+1)) -s wget-build
>>>> wget 1.14 Building
> test
> Making all in lib
> Making all in src
> Making all in doc
> Making all in po
> Making all in tests
> Making all in util
> ----
>
> If i remove the '+' charter:
> ----
> $ make BR2_JLEVEL= -j$((`getconf _NPROCESSORS_ONLN`+1)) -s wget-build
>>>> wget 1.14 Building
> test
> make[1]: warning: jobserver unavailable: using -j1.  Add `+' to parent
> make rule.
> Making all in lib
> Making all in src
> Making all in doc
> Making all in po
> Making all in tests
> Making all in util
> ----
>
> Best regards
>


-- 
Arnout Vandecappelle                          arnout at mind be
Senior Embedded Software Architect            +32-16-286500
Essensium/Mind                                http://www.mind.be
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