GCC 4.8.2 binaries now at http://os2ports.smedley.id.au
I'll get the source up at github when i get a spare afternoon
Finally tested the C part by running the FFmpeg FATE suit which consists of about 2000 tests.
http://ffmpeg.org/fate.html.
While GCC 4.4.6 usually passes all tests (I get failures on 2 HEVC (H265) compliance tests after a few days of up time, see
http://fate.ffmpeg.org/history.cgi?slot=x86.os2.446 and for comparison
fate.ffmpeg.org), 4.8.2 failed between 24 and 30 tests and ffmpeg.exe and especially ffprobe.exe froze multiple times forcing me to kill them. There's still something wrong, I'd guess alignment issues.
If you want to test, you need to configure with cpu=i486 or higher to pull in the GCC atomics (could they be broken?) and I'll attach a patch for eCS to work around the buggy PMSHELL. Note this also tests your environment as things like diff not supporting stdin or a bad bc will cause falures. Need to use [k]sh to run configure as well due to buggy ash (doesn't set CWD).
Anyways thanks for the great work and I wish I knew how to debug some of this stuff.