[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 #58 from Peter Dyballa <Peter_Dyballa at web dot de> ---
This is the "clean" build environment in which it all happens:

bzip2                          @1.0.8_0 
cctools                        @949.0.1_3 
db48                           @4.8.30_5 
expat                          @2.8.1_0 
gcc15                          @15.2.0_0 
gcc_select                     @0.1_10 
gettext-runtime                @1.0_0 
gmp                            @6.3.0_0 
isl                            @0.24_1 
ld64                           @3_6+ld64_97 
ld64-97                        @97.17_9+llvm34 
libedit                        @20251016-3.1_0 
libffi                         @3.4.8_0 
libgcc                         @15_0 
libgcc15                       @15.2.0_0 
libiconv                       @1.18_0 
libmacho-headers               @949.0.1_0 
libmpc                         @1.4.1_0 
libunwind-headers              @5.0.1_0 
llvm-3.4                       @3.4.2_17 
llvm_select                    @2_1 
llvm_select-3.4                @2_1 
lz4                            @1.10.0_0 
mpfr                           @4.2.2_0 
ncurses                        @6.6_0 
openssl11                      @1.1.1w_1 
python2_select                 @0.1_0 
python27                       @2.7.18_10 
python_select                  @0.3_10 
sqlite3                        @3.53.2_0 
xz                             @5.8.3_0 
zlib                           @1.3.2_0 
zstd                           @1.5.7_0