Re: GCC8 v.s. amiga

[christos%astron.com@localhost (Christos Zoulas)]

In article <7632a89e-c1a4-583d-941c-0fee511080ab%gmail.com@localhost>,
Rin Okuyama  <rokuyama.rk%gmail.com@localhost> wrote:
>Hi,
>
>For my Amiga A1200 with 68060, kernel built by GCC8 does not work.
>It randomly crashes, and I could not enter DDB nor even obtain
>backtrace; it suddenly freezes.
>
>This occurs even if the entire kernel is built with -O0. On the
>other hand, if only kern_tc.o is replaced by that compiled by GCC7,
>kernel works without problems as far as I can see.
>
>Userland built by GCC8 works just fine. Also, for other m68k ports,
>kernels for sun3 and luna68k seem (almost) OK. Kernel for mac68k
>works if -fno-omit-frame-pointer is specified (-fomit-frame-pointer
>is enabled by default for optimize levels >= -O1 for GCC8).
>
>I tried various things, but all attempts failed miserably.
>Could anyone help us? If you have Amiga's, please test kernel
>built by GCC8 for your configuration.

Wow, you did a lot of work... If I wanted to drill this down more I would
start comparing rhe generated assembly from gcc-7 and gcc-8, or split the
file into individual functions and see which one is broken.

christos