Failed to build using gimp-2.99.12-autotools.tar.bz2 (due to tool not present in makefile)
Built via autotools using gimp-2.99.12-autotools.tar.bz2 is failed due to absence of tools/generate-welcome-dialog-data.py
file within tarball.
make[3]: *** No rule to make target '../../tools/generate-welcome-dialog-data.py', needed by 'welcome-dialog-data.h'. Stop.