limited to disabling compiler-optimizations.
Proper fixing seems inherently impossible -- even with -O0 valgrind
flags hundreds of unitilized memory accesses during self-check.
Tested with gcc8 and the base cc (clang) -- remove the GCC-requirement.
Add some patches from Debian.
While here simplify the extract-target a little and remove the BROKEN*
lines to attempt building on other platforms again...
Bump port-revision.
PR: 232936
fce5ac2c97