pkg-config version confusion

[Arkadiusz Drabczyk]

On Thu, Jan 04, 2018 at 01:27:23AM -0500, Jeffrey Walton wrote:
> Hi Everyone,
> 
> I'm trying to track down an issue when AC_MSG_ERROR goes missing after
> updating M4, Autoconf, Automake and Libtool. Stack Overflow says to
> update Pkg-Config next (https://stackoverflow.com/q/8811381/608639).
> 
> When I check my Fedora 26 x86_64 machine:
> 
>     $ command -v pkg-config
>     /bin/pkg-config
>     $ pkg-config --version
>     1.3.12
> 
> But when I check the pkg-config download at
> https://pkgconfig.freedesktop.org/releases are it says the latest
> version is 0.29.2 from MARCH 2017.
> 
> Does anyone know what is going on with the version information? Is
> 1.3.12 newer or older than 0.29.2?

Maybe it's https://github.com/pkgconf/pkgconf/releases.  Here
https://fedoraproject.org/wiki/Changes/pkgconf_as_system_pkg-config_implementation
it also says:

"This change switches Fedora's system-wide/default pkg-config
implementation to pkgconf, a new implementation of pkg-config that
provides better support for handling .pc files and a stable library
ABI/API for integrating into applications."
-- 
Arkadiusz Drabczyk <arkadiusz at drabczyk.org>