[Bug go/79281] gccgo: Binaries using goroutines crash on m68k

[glaubitz at physik dot fu-berlin.de]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=79281

--- Comment #5 from John Paul Adrian Glaubitz <glaubitz at physik dot fu-berlin.de> ---
(In reply to James Clarke from comment #4)
> Ah, sorry, there's a separate C implementation of all this. I imagine it's
> the bools in "struct M" in runtime.h messing it up, so "struct Note" and
> "struct Lock" need __attribute__((aligned(4))) on their key fields.

I just did that on gcc-6.

The result is:

(sid-m68k-sbuild)root@ikarus:/# ./routines 
Alice
Bob
Hello
World
Alice
Bob
Hello
World
Alice
Bob
Hello
World
Alice
Bob
Hello
World
Alice
Bob
Hello
(sid-m68k-sbuild)root@ikarus:/#

:D

I haven't tested gcc-7 yet, but at least this fix for gcc-6 can be added.