Recent GCC and GDB updates have led to issues that currently have no solutions. I'm also stumped and have run out of avenues to search.

GCC 13.1 does not work on Windows XP (SOLVED)

As of 7256915, GCC no longer runs on Windows XP. Every other program works, just not cc1.exe. When attempting to run this program, (x86) Windows XP reports "The system cannot execute the specified program." with no further details. The same binary works fine on Windows 7 and later. To build your own test:

$ ./multibuild.sh -4q

advzip-compressed GDB 13.1 cannot be decompressed on x64 Windows

The problems began with fdac8e3. I normally advzip -z4 releases to shave about 5% off their size, but after I do this x64 Windows fails to decompress gdb.exe with error 0x80004005. No further information is provided by Windows. It still works on x86 Windows, and so I believe this is an old x64 Windows bug. It dates back at least as far as Windows 7. Until this is solved releases will be a few MiB larger.

More details, including a reduced sample file (advzip.sample) in 2cf762a. To reproduce: Place advzip.sample in a zip file, advzip -z4 that file, then try to decompress using x64 Windows's built-in ZIP support.

It is not feasible to compile GCC 13.1 on a Raspberry Pi 4

As of 13.1, GCC has become so large and complex that it runs out of memory during the bootstrap. So far I've built all the releases on this Raspi4. Not a big deal, but it is sad.