[Bug libgcc/123976] GCC 15.2.0 (libgcc) does not build on PPC Mac OS X 10.5.8, Leopard, because of missing "md-unwind-def.h"

[Peter_Dyballa at web dot de via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=123976

--- Comment #33 from Peter Dyballa <Peter_Dyballa at web dot de> ---
(In reply to Sergey Fedorov from comment #31)
> (In reply to Peter Dyballa from comment #27)
> 
> Did you try a clean build?

What is a "clean build"? Starting with 'port deactivate installed'?