Re: [Mingw-cross-env-list] Package qt: pkg-config files not found

[Mark Brand]

Hi Martin,

Martin Lambers wrote:
> Hi,
>
> since Qt is now installed in its own directory tree, pkg-config cannot
> find the *.pc files automatically anymore.
>
> Is it really necessary to install Qt into its own tree? Does that mean
> that Qt5 will use the same names for library files and .pc files?

The status quo is that it will be necessary to install Qt 4 and Qt 5 
into separate directories. However, since I moved Qt 4 into a separate 
directory in MXE there have have been discussions on the qt development 
list about changing this. I think we'll have to wait and see how that 
turns out.

> If different pkg-config file names will be used, the .pc files could be
> moved back to the original tree so that no special configuration is
> necessary for pkg-config to find them.

Yes, this is one of the possibilities being considered. The .pc files 
would get major version specific names so they could be co-installed in 
the regular pkgconfig directory.

Another possibility is that major version specific names could be used 
for .pc files, libraries, .prl files, etc to support general 
co-installation into the same prefix.

Note that this "problem" affects pkg-config, but not qmake which knows 
where its install tree is.

My recommendation for MXE users who use pkg-config instead of qmake for 
Qt would be to add the appropriate search directory for pkg-config. See 
popppler.mk for an example of this.

By the way, for my own projects I prefer to use qmake and its pkgconfig 
support where necessary.

Mark