Re: [gtk-osx-users] "Python installation not usable" error in Big Sur

[John Ralls <jralls ceridwen us>]

Lee,

Please remember to copy the list on all replies.

As for how to add to your list of modules, it's what you pass to `jhbuild build` or include in the modules 
variable in jhbuild-custom.

Please read https://developer.gnome.org/jhbuild/stable/ and http://wiki.gnome.org/Projects/GTK/OSX. Keep in 
mind that Gtk-OSX is not intended as a general-purpose package manager like Homebrew or MacPorts: It is 
intended for developers/maintainers of Gtk-based applications to package their projects as Mac App bundles.

Regards,
John Ralls



> On Jan 14, 2021, at 12:14 PM, Lee Marrett <lee marrett serato com> wrote:
>
> Thanks John,
>
> No worries - I shall try that.
>
> At the risk of sounding ridiculous, I’m not 100% sure on how to add things to my list of modules, any tips 
> on doing that?
>
>
>
> > On 14/01/2021, at 5:06 PM, John Ralls <jralls ceridwen us> wrote:
> >
> >
> >
> > > On Jan 12, 2021, at 6:54 PM, Lee Marrett via gtk-osx-users-list <gtk-osx-users-list gnome org> wrote:
> > >
> > > Hello,
> > >
> > > Trying to run jhbuild build meta-gtk-osx-bootstrap meta-gtk-osx-gtk3 but getting an error during build:
> > >
> > > ../../../../gtk/source/gobject-introspection-1.64.1/giscanner/meson.build:111:2: ERROR: Problem 
> > > encountered: Python installation not useable
> > >
> > > Logs say:
> > >
> > > Compiler for C supports arguments -Wno-unused-parameter: YES (cached) "python-3.8" could not be found in 
> > > LIBPC 
> > > (/Applications/Xcode.app/Contents/Developer/Library/Frameworks/Python3.framework/Versions/3.8/lib/pkgconfig),
> > >  this is likely due to a relocated python installation Pkg-config binary for MachineChoice.HOST is 
> > > cached. Determining dependency 'python-3.8' with pkg-config executable 
> > > '/Users/username/gtk/inst/bin/pkg-config' PKG_CONFIG_PATH: 
> > > /Users/username/gtk/inst/lib/pkgconfig:/Users/username/gtk/inst/share/pkgconfig:/usr/lib/pkgconfig Called 
> > > /Users/username/gtk/inst/bin/pkg-config --modversion python-3.8` -> 1
> > >
> > > Found "python-3.8" via fallback pkgconfig lookup in PKG_CONFIG_LIBDIR/PKG_CONFIG_PATH Dependency python 
> > > found: NO
> > >
> > > ../../../../gtk/source/gobject-introspection-1.64.1/giscanner/meson.build:111:2: ERROR: Problem 
> > > encountered: Python installation not useable `
> > >
> > >
> > > Any ideas how I might get it to look at the right place for python, which is definitely installed?
> >
> > I haven't tried building with the Apple-installed Python3 and I'm not able to blow up my build environment 
> > to test it just now. The simplest work-around is to add python3 to your list of modules.
> >
> > Regards,
> > John Ralls