[Freemint-discuss] Debugging a problem in gcc-14

[Thorsten O. <ad...@th...>]

Hi,

i'm currently trying to diagnose a problem in gcc-14. The symptom is that

- it works when using the gcc-13.3.0 cross-compiler
- it works when using the gcc-14.1.0 cross-compiler
- it works when using the native gcc-13.3.0 compiler on aranym
- but it crashes with a bus-error (mint's idea of a segmentation fault) when 
using the native gcc 14.1.0 compiler.

Its not a problem of aranym, the same fault was also reported when run on real 
hardware.

I've already tried to debug this using gdb, but that's almost impossible: it 
is the cc1 compiler that crashes, and when compiled with debug info, that 
makes ~287MB, and even on aranym it takes about an hour to load it.

So i'm thinking of trying to bisect this, since it obviously is caused by some 
change between 13.3.0 and 14.1.0. But how can i do that? I cannot use the 
master branch, because it does not contain our port changes. And our ports of 
gcc-13 and gcc-14 are on different branches. So how can i bisect between 
different branches?