Re: Does GNU Make allow get number of running jobs?

[Oleksandr Gavenko]

On 2011-01-29 10:33, Eli Zaretskii wrote:
> > From: Oleksandr Gavenko<address@hidden>
> > Date: Sat, 29 Jan 2011 00:22:49 +0200
> >
> > Cygwin make does not support jobserver.
>
> Really?  That's strange.  Jobserver needs very basic Posix features,
> which AFAIK Cygwin supports for a long time: signals and pipes.  Are
> you sure you are using a sufficiently new Cygwin port of Make?  What
> does "make --version" say?
>
> If all else fails, try asking on the Cygwin mailing list.  If they
> tell you jobserver isn't supported, then it really isn't.  But I'd be
> surprised.
Sorry I am wrong. When I call make for Makefile with 'make -f ...'
it print warning:

  $ LANG=C make -j 4 dist
if [ ! '' == 'dist' ]; then make -f Makefile.ru dist; fi
make[1]: Entering directory `/cygdrive/e/home/devel/job/iCrypto-hg/core'
make[1]: warning: jobserver unavailable: using -j1.  Add `+' to parent 
make rule.
....

But I change my Makefile to use '$(MAKE) -f ...' and warning go away
and CPU load increase to 100% instead <50% for 2 cores.

I need start from simple Makefile to see that all OK and I am wrong:

  $ cat Makefile
$(error $(.FEATURES))
  $ make
Makefile:1: *** target-specific order-only second-expansion else-if 
archives jobserver check-symlink.  Останов.

If I cearfully read manual I can found:

  Recursive `make' commands should always use the variable `MAKE',
  not the explicit command name `make'

--
Best regards!