[libvirt] [PATCH] Don't generate python bindings multiple times w/ parallel build

[Daniel P. Berrange]

On Mon, Feb 16, 2009 at 06:39:35PM -0500, Cole Robinson wrote:
> The attached patch was posted by Michael Marineau at:
> 
> https://bugzilla.redhat.com/show_bug.cgi?id=472702
> 
> It prevents generating the python bindings multiple times in a parallel
> build. Works fine in my testing, so I figured I'd pass it along here for
> better exposure, since it has been languishing in bugzilla.

IMHO, the generator.py should be fixed so we can request which
individual file we want it to generate. So instead of having
it generated all files, it'd just genrate the file that make
actually asked for, 

eg, so if we wanted to generate   libvirt.py we'd invoke it
with

    generator.py $(srcdir) libvirt.py



> diff --git a/python/Makefile.am b/python/Makefile.am
> index 8d1462b..a7c342e 100644
> --- a/python/Makefile.am
> +++ b/python/Makefile.am
> @@ -51,8 +51,11 @@ GENERATED= libvirt-export.c \
>  	   libvirt-py.h \
>  	   libvirtclass.py
>  
> -$(GENERATED): $(srcdir)/$(GENERATE) $(API_DESC)
> +generated.stamp: $(srcdir)/$(GENERATE) $(API_DESC)
>  	$(PYTHON) $(srcdir)/$(GENERATE) $(srcdir)

So that would instead explicitly give the target file:

  	$(PYTHON) $(srcdir)/$(GENERATE) $(srcdir) $@

Daniel
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