[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]

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

--- Comment #49 from Peter Dyballa <Peter_Dyballa at web dot de> ---
(In reply to Sergey Fedorov from comment #48)
> (In reply to Peter Dyballa from comment #47)

> 1. As Iain noted, in order for this problem to be addressed here in
> upstream, it must be shown to exist without MacPorts/PPCPorts/Homebrew or
> any other external build system involvement.

What does that mean practically for me? Should I first try a "clean build"
outside of MacPorts with a only minimal set of software from MacPorts? React to
configure when it reports that this or that is missing? And start the build a
few times anew (after a `make clean`, or `distclean`)?

> (I understand that it takes
> time, effort and cpu cycles, but without that it is not clear how to
> reproduce it.)

Time is not a problem. My PowerBook still exists and needs some tasks to
perform. (Or it would become useless.)

> > gcc10-bootstrap is only listed as a build dependency here, but in reality it
> > does not exist on my Leopard, because it does not build here.
> 
> This is an issue to discuss with MacPorts, if you use official MacPorts, or
> with me, if you use my fork.

Later in July I can retry, this time as a "clean build". (But actually I do
need it and intend to remove this dependency from Portfiles.)