Re: About libtool supporting parallel "make install"

[Dan Nicholson]

On Thu, Mar 17, 2011 at 11:40 PM, Ralf Wildenhues
<address@hidden> wrote:
> * Dan Nicholson wrote on Thu, Mar 17, 2011 at 11:47:38PM CET:
>> On Thu, Mar 17, 2011 at 3:08 AM, Pacho Ramos <address@hidden> wrote:
>>
>> > https://bugzilla.gnome.org/show_bug.cgi?id=644896#c2
>>
>> This seems more legitimate. I looked at the Makefile.am's and they
>> look reasonable to me. You have two libraries, one is in
>> lib_LTLIBRARIES and the other is in pkglib_LTLIBRARIES. The pkglib one
>> depends on the lib one.
>>
>> It seems that make is running install-libLTLIBRARIES and
>> install-pkglibLTLIBRARIES in parallel. Each one of these these rules
>> installs the libraries serially in a loop. However, if libtool is
>> relinking the libraries, it really needs to wait until the
>> prerequisite libraries from _other_ rules are installed. I'd bet if
>> you do this:
>>
>> echo "install-pkglibLTLIBRARIES: install-libLTLIBRARIES" >>
>> src/backend/xml/Makefile
>>
>> it will work again. This seems like a bug in automake's libtool
>> support to me, but I don't know how to fix it.
>
> Yes, it's a bug in Automake/Libtool, but the workaround isn't quite
> correct: you'd need something like
>
> install-pkglibLTLIBRARIES = install-pkglibLTLIBRARIES
> $(install-pkglibLTLIBRARIES): install-libLTLIBRARIES
>
> because your proposed workaround will cause automake to not emit its
> install-pkglibLTLIBRARIES rule at all.  Yes, depending on automake not
> seeing through variables when determining target names is ugly, I know.
> (It's also so widespread by now that we can't easily change that issue.)

Oh, I see what you mean. If you add it to the generated Makefile, it
would work, though.

> I've posted some ideas to fix the original bug before, on an automake or
> libtool list; but nothing finished.  :-/

I'd never encountered this issue before, but I hope it is something
you can fix. I more or less understand how autoconf and libtool work,
but I've never deleved into automake.

--
Dan