[fpc-devel] Parallel compilation 'make all -j 5' option

[Mark Morgan Lloyd]

Jonas Maebe wrote:
> On 15 Aug 2012, at 18:11, Graeme Geldenhuys wrote:
> 
>> Does 2.7.1 not use parallel compilation any more?  I just compiled
>> 2.7.1 and only noticed that one of my CPU cores got high usage at a
>> time. Some months back I could see all four cores work hard at a
>> certain point in FPC's compilation (I think when compiling the
>> packages units).
> 
> You now also have to add FPMAKEOPT="-T 5". The reason is that the packages are now compiled by fpmake, and GNU make unfortunately has no way to query the value of the -j parameter inside a makefile so it cannot be automatically passed on to fpmake.

Although on unix (Linux, Solaris) it's not too difficult to extract the 
top-level make command line from ps output; I've not checked but this is 
presumably also in the /proc tree.

-- 
Mark Morgan Lloyd
markMLl .AT. telemetry.co .DOT. uk

[Opinions above are the author's, not those of his employers or colleagues]