[Ecls-list] Non-parallel build "patch"

Daniel Kochmański jackdaniel at hellsgate.pl
Thu Feb 12 06:22:41 UTC 2015


this bug is fixed on git head, and parallell builds are working now
(tested with -j9, and -j3).

Best regards,

Bruce-Robert Fenn Pocock writes:

>>From #lisp today:
> taylanub 4:45:25 PM
>    looks like the problem was that Guix runs make with -j set to >1 by
> default, and the Makefile isn't written with parallelism taken into count.
> adding --jobs=1 to make arguments in the package recipe fixed the issue :)
>    I should probably send in a bug report to ECL
>    isn't ecl unmaintained now
>    ugh, there's already a bug report for this issue anyway
>    oh but that's from 2009 and supposedly closed, so it must have been
> reintroduced
>    oh, closed because "We do not support parallel builds of ECL."
>    wonder if a Makefile can't declare that limitation?.. w/e
> A check of the Gnu Make manual finds:
> You can inhibit parallelism in a particular makefile with the
> `.NOTPARALLEL' pseudo-target
>      If `.NOTPARALLEL' is mentioned as a target, then this invocation
>      of `make' will be run serially, even if the `-j' option is given.
>      Any recursively invoked `make' command will still run recipes in
>      parallel (unless its makefile also contains this target).  Any
>      prerequisites on this target are ignored.
> The below seems to save us from default-to-parallel makes.
> diff --git a/Makefile.in b/Makefile.in
> index 3dbba5d..318f35d 100644
> --- a/Makefile.in
> +++ b/Makefile.in
> @@ -70,6 +70,9 @@ all: build/Makefile
>         cd build; $(MAKE)
>  .PHONY:        all
> +# We do not survive parallel builds reliably.
> +
>  Makefile: Makefile.in build/config.status
>         (cd build; ./config.status)
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Daniel Kochmański | Poznań, Poland
;; aka jackdaniel

"Be the change that you wish to see in the world." - Mahatma Gandhi

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