I might be “on the same page” now. I see an error:
/home/abuild/rpmbuild/BUILD/darktable-2.4.4/src/common/exif.cc:2658:71: error: no matching function for call to 'Exiv2::BasicError<char>::BasicError(int, const char [41])'
throw Exiv2::Error(1, "[xmp_write] failed to serialize xmp data");
And that’s what’s being reported today in exiv2 0.27+ on darwin fails with Exiv2::BasicError<char> error · Issue #644 · Exiv2/exiv2 · GitHub For which the proposed fix is: https://gitlab.gnome.org/samm-git/gtk-osx/blob/fork-test/patches/exiv2-symbols.patch
The fix is only “proposed” at the moment. We hope to resolved this in the next few days.
I’m rather lost here. For sure I looked in the wrong log last week. Although you’re discussing patches, I don’t know to which patches you are referring and you appear to be dealing with RC1 and RC2 which were release candidates.
There is a “hard fault” on Exiv2 v0.27.0 GM in regard of Exiv2::BasicError. I expect the fix for this to be in Exiv2 v0.27.1 scheduled for 2019-03-31. The issue is being tracked: exiv2 0.27+ on darwin fails with Exiv2::BasicError<char> error · Issue #644 · Exiv2/exiv2 · GitHub