[OE-core] [PATCH] bison: Reset load average settings if specified in environment

[Richard Purdie]

On Sat, 2020-03-14 at 21:29 -0700, Khem Raj wrote:
> In some cases, we run into parallel build failures where
> BUILT_SOURCES
> is skipped, as a result required header files are not generated and
> the
> build fails with missing header errors like
> 
> ../bison-3.5.2/lib/uniwidth/width.c:21:10: fatal error: uniwidth.h:
> No such file or directory
>  #include "uniwidth.h"
>           ^~~~~~~~~~~~
> compilation terminated.
> 
> BUILT_SOURCES should be built automatically with `make all` [1]
> therefore
> ensure that make is invoked with `all` target
> 
> bison-native parallel build fails when -l<n> is passed globally from
> build environment, errors like below due to race starts to show up
> 
> Therefore removes a previous load limit if set
> 
> [1] 
> https://www.gnu.org/software/automake/manual/html_node/Built-Sources-Example.html#Built-Sources-Example

I'm not sure I understand this. We've seen a failure on our ubuntu1604
performance tester which I think is the same bug as this. The
environment on that machine doesn't change, so how/where is this -l
option coming from?

I suspect there is some issue we're not quite getting to still :(

Cheers,

Richard