[erlang-questions] enforcing concurrent make in otp_build

Anthony Ramine <>
Thu Dec 12 13:51:54 CET 2013


I do MAKEFLAGS="..." ./otp_build ...

As a side note, GNU Make 4 has a nice feature for improving parallel build output:

       -O[type], --output-sync[=type]
            When running multiple jobs in parallel with -j, ensure the output of  each  job  is  collected
            together rather than interspersed with output from other jobs.  If type is not specified or is
            target the output from the entire recipe for each target is grouped together.  If type is line
            the  output  from  each  command line within a recipe is grouped together.  If type is recurse
            output from an entire recursive make is grouped together.  If type is none output synchroniza-
            tion is disabled.

This makes Clang diagnostics readable even in a parallel build.

-- 
Anthony Ramine

Le 12 déc. 2013 à 13:30, Lukas Larsson <> a écrit :

> I normally use "export MAKEFLAGS=-j10 && ./otp_build" on Linux, maybe that works for you as well on bsd?
> 
> Lukas
> 
> 
> On Thu, Dec 12, 2013 at 1:13 PM, Kenji Rikitake <> wrote:
> I am trying to find out how to enforce concurrent execution of `make`
> in the otp_build shell script.  I want to do the same thing as `make -j8`.
> So far I have discovered that setting the environment variable MAKE will do,
> such as `env MAKE="make -j8" otp_build build`.  Am I in the right path?
> (Note that on FreeBSD it's `gmake`)
> 
> I want to make the build process of the kerl script faster, such as in
> 
>     env MAKE="make -j10" kerl build R16B03 r16b03-test # `gmake` on FreeBSD
> 
> I`d be glad if I could hear more efficient ways to do this.
> 
> Regards,
> Kenji Rikitake
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