Created attachment 1957454 [details] gtk+-1.2.10-c99.patch The package needs fixes to build with future compilers which do not support implicit function declarations nor implicit ints. Work to enable compatibility started in 2019, but no bug was filed at the time. Upstream no longer supports gtk+ 1.2.
Created attachment 2004227 [details] gtk+-1.2.10-ptrtype.patch Additional patch added by Paul Howarth to fix an incompatible-pointer-types issue.