Re: Parallel builds across makefiles

[Paul Smith]

On Sun, 2016-07-17 at 15:48 +0000, Gardell, Steven wrote:
> OK. Thanks! I will try the latest version. 
> 
> FWIW, I am measuring is total wall clock time to complete the build.
> (date; gmake... ; date) This goes up substantially with all sync modes
> other than "none" if gmake has parallel invocations of sub-makes going
> (e.g. "gmake  -f SomeOtherMakefile").  When I am only parallelizing
> individual makefiles (with ACE, these tend to be simple lists of files
> to compile), then the behavior is as promised by the documentation.

Assuming you determine the behavior exists even in version 4.2.1, please
provide more details.  What level of -j are you using?  Which sync mode
are you using?  Do you get the same behavior even with lower levels of
-j, if yours is very large?