n64 abi support?

[Sunny-Maxis]

Any chance you can either build the GCC binary as an n64 executable (to get full 64-bit memory space support) or better yet, add n64 abi support for building 64-bit executables?

I worked with Kazuo K. of IRIXNet on rebuilding and reinstating GCC 6 multilib support and offered some guidance there. We ran into a few issues where the compiler hits OOM due to the n32 address space. Any solutions you can think of?

[pdaxrom]

n64 - do you mean o64? for o64 i can not find sources to install libc.so - even with MIPSpro i can not compile. if this happens then multilib configuration will be possible. Sorry, i have only had these computers for one month, so i do not know much yet.

[pdaxrom]

now multilib is supported for o32 and n32 (use parameters -mabi=32 -mabi=n32). But, both ABI are supported in Irix 6.2, for 6.5 only n32 works - maybe I didn't install all packages for o32.

[Sunny-Maxis]

No sir, I mean the new64 abi introduced with IRIX 6.2

o64 is for IRIX 5.3 iirc.

https://tech-pubs.net/SGI_Developer/books/MProPort_TG/sgi_html/index.html

Me and Kazuo K. are happy to work with you on improving your GCC. Review the patches that he mentions in this thread, they will differ from yours a little.

https://forums.irixnet.org/thread-4424.html

I'll fork your code this upcoming week when I have time off my job and give my thoughts and offer a pull or two.

[pdaxrom]

Thanks for the explanation.

I updated ABI64 patches and build for Irix 6.5, ABI64 added to multilib config and it works.
Build cross compiler (and then native if needed) with config-irix65.inc, and use -mabi=64 parameter to build objs/executables (default is n32).

[Sunny-Maxis]

Sounds good. Thanks for your hard work.

Expect some help from me soonish. We have a collection of patches that might be useful (libgomp has a few issues, and there's a section in dwarf2cfi that needs fixing for irix bootstrapping if you bootstrap natively)

Whenever Kazuo gets around to disabling non sgi mips testsuites, I'll make sure to have those patches available.