[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"

[iains at gcc dot gnu.org]

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

--- Comment #225 from Iain Sandoe <iains at gcc dot gnu.org> ---
(In reply to Peter Dyballa from comment #222)
> But anyway: I can restart next time in a new Terminal window and set PATH
> and PKG_INFO_PATH and maybe some more environment variables.

GCC build does not require PKG_INFO_PATH, but it should be harmless.

"maybe some more environment variables"  .. which ones? and why?