"port install meld" does not yield working executable

[Ryan Schmidt]

On Mar 17, 2021, at 04:07, joerg van den hoff wrote:
> On 17.03.21 05:07, Ryan Schmidt wrote:
>> On Mar 16, 2021, at 13:47, joerg van den hoff wrote:
>>> "** (meld:70489): WARNING **: 19:46:07.080: Failed to load shared library './gtksourceview/libgtksourceview-4.0.dylib' referenced by the typelib: dlopen(./gtksourceview/libgtksourceview-4.0.dylib, 9): image not found
>>> Meld requires GtkSourceView 4.0 or higher.
>>> "
>> Hmm.
>> That's a relative path, but I don't know what it's meant to be relative to.
> 
> yes, I noted this (and suspected that some (environment?) variable might not be set correctly somewhere so that $PWD is used as fallback in its place when constructing that path).
> 
>> On my system, the gtksourceview4 port installs the file /opt/local/lib/libgtksourceview-4.0.dylib. Do you have that file?
> 
> yes I do:
> 
> -rwxr-xr-x  1 root  admin  803912 Mar  9 22:42 /opt/local/lib/libgtksourceview-4.0.dylib

Hmm again.

meld works fine for me on macOS High Sierra. What macOS and Xcode version are you using?

meld is a python script. I added some debugging to mine: right before this line:

            if version < (self.major_version, self.minor_version):

I added this line:

            print("version of %s is %s" % (mod.__name__, version))

Then when I started meld it says:

version of sys is sys.version_info(major=3, minor=8, micro=8, releaselevel='final', serial=0)
version of gi.repository.Gtk is (3, 24)
version of gi.repository.GLib is (2, 58)
version of gi.repository.GtkSource is (4, 0)
version of gi is (3, 38, 0)
version of cairo is (1, 20, 0)

The "gi" in gi.repository.GtkSource alerts me to the fact that this is created by gobject-introspection and is the file /opt/local/share/gir-1.0/GtkSource-4.gir. I think there is something wrong with your /opt/local/share/gir-1.0/GtkSource-4.gir. Specifically in mine, there is the line:

shared-library="/opt/local/lib/libgtksourceview-4.0.dylib"

and I think in yours the line is different. And I think it's this bug:

https://trac.macports.org/ticket/61792

and this bug:

https://trac.macports.org/ticket/62391

I think gobject-introspection is just broken for the moment. (Or it is fixed but we forgot to revbump all the affected ports to rebuild them.)

I guess you could manually edit affected .gir files to fix the shared-library paths to be the correct absolute ones.