Re: Mac OS X and pkg-config

On Wed, Jun 10, 2015 at 03:06:48PM +0200, Michael Stahl wrote:
> On 10.06.2015 11:43, Khaled Hosny wrote:
> > On Tue, Jun 09, 2015 at 12:36:41PM +0300, Tor Lillqvist wrote:
> > > > Some of us work on other opensource projects on our Mac machines which
> > > > happen to need MacPorts or HomeBrew.
> > > >
> > > > Having LibreOffice simply say "I refuse to build on this machine because
> > > > you've already installed some other stuff" is not very friendly.
> > >
> > > But neither is it very useful to have the already small set of OS X -based
> > > developers split into those who use a pure upstream way to build, those who
> > > use HomeBrew libjpeg but bundled Python, those who use MacPorts Python and
> > > libjpeg, etc.
> >
> > No, that what I want to achieve, what I want is to make sure LibreOffice
> > builds the same way regardless of the presence or absence of pkg-config
> > on Mac OS X, so that is no longer needs to stop the build if one is
> > found.
>
> i've slightly improved the error message now to "Please modify your PATH
> variable so that $PKG_CONFIG is no longer found by configure scripts."
> with commit
> ada6281a5bd74d0ff6ae578d57f39f65b7c25103 so it's at least obvious what
> to do.
>
> but since we already have PATH in config_host.mk it would perhaps be
> possible to detect which directory the pkg-config is found in and
> automatically filter that out of $PATH (unless it's something that
> cannot be removed like /usr/bin).  would that be an improvement for you,
> and/or would anybody object to that?
>
> also, it is theoretically possible to export PKG_CONFIG="" or something
> like that to override it in our bundled external libraries, but whether
> that will actually work for every single one would require testing; i
> can easily imagine hard-coded fallbacks and whatnot.

I think setting PKG_CONFIG_* environment variables to empty values will
make pkg-config not find any installed libraries, so if we can do that
for LibreOffice build shell (or whatever it is called) on Mac OS X
(either by default or only when pkg-config is found) it should make its
presence an non concern for LibreOffice build.

Regards,
Khaled