RFR: 8256829: GNU hash style is not available on MIPS

[John Paul Adrian Glaubitz]

On Sun, 22 Nov 2020 14:19:04 GMT, Aleksey Shipilev <shade at openjdk.org> wrote:

> For fun, I tried to build `linux-mips64el-zero-fastdebug`, and it cannot be built, because linker complains:
> 
> 
> collect2: error: ld returned 1 exit status
> 
> I believe it is a regression in 16, as GNU hash style was forced with [JDK-8200738](https://bugs.openjdk.java.net/browse/JDK-8200738). The way out is to special-case MIPS hash-style to `sysv`. This enumerates all MIPS targets that `make/autoconf/platform.m4` knows about.
> 
> Attention @DamonFool, who must be running into this problem for their MIPS builds?
> 
> Testing:
>  - [x] Linux mipsel zero fastdebug build (requires additional unrelated fixes)
>  - [x] Linux mips64el zero fastdebug build

Hi Aleksey!

> For fun, I tried to build `linux-mips64el-zero-fastdebug`, and it cannot be built, because linker complains:

Thanks for looking to fixing the non-mainstream architectures. I'm surprised we don't need the sigset patch anymore for MIPS, looks like that has been upstreamed already.

If you are looking into fixing more of such issues, you can have a look at the patches we currently carry in Debian to address various of such issues:

> https://git.launchpad.net/~openjdk/ubuntu/+source/openjdk/+git/openjdk/tree/debian/patches

I'm currently busy with LLVM but I'm planning to get more active with OpenJDK in the future and get more of such fixes upstreamed.

Again, thanks for fixing this. We actually use OpenJDK on MIPS targets in Debian.

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PR: https://git.openjdk.java.net/jdk/pull/1374