Re: HEAD doesn't build. Totally stalled.

I’ve tried to reproduce this and it turns out, I fail to. You are somehow building the rts either with _FORTYFY_SOURCE or __SSP__, but then your linker ends up not passing -lssp or the equivalent for your tool chain. At this point I’m tempted to add an additional ARM arch guard. While that would be conceptually wrong, it would reduce the cases where this could go wrong to a rarely used platform. Maybe @Ben Gamari has an idea? On Thu, 16 Jul 2020 at 10:25 PM, Simon Peyton Jones wrote:

Moritz

How’s it going getting this patch committed?

It’s painful manually applying a fix, but then NOT committing that to master by mistake

Thanks

s

*From:* Moritz Angermann *Sent:* 14 July 2020 12:14 *To:* Simon Peyton Jones *Cc:* ghc-devs@haskell.org *Subject:* Re: HEAD doesn't build. Totally stalled.

For some reason, you end up in the defined RTS_SSP_SYMBOLS, I believe and then the RTS wants __stack_chk symbols. Which it can’t find when linking.

Replacing

#if !defined(mingw32_HOST_OS) && !defined(DYNAMIC)

#define RTS_SSP_SYMBOLS \

SymI_NeedsProto(__stack_chk_guard) \

SymI_NeedsProto(__stack_chk_fail)

#else

#define RTS_SSP_SYMBOLS

#endif

With just

#define RTS_SSP_SYMBOLS

Should do. I hope.

Currently only on mobile phone :-/

Cheers,

Moritz

On Tue, 14 Jul 2020 at 7:06 PM, Simon Peyton Jones wrote:

thanks. What specifically do I comment out?

*From:* Moritz Angermann *Sent:* 14 July 2020 12:00 *To:* Simon Peyton Jones *Cc:* ghc-devs@haskell.org *Subject:* Re: HEAD doesn't build. Totally stalled.

This was my fault. Not sure why this wasn’t caught in CI.

It’s due to the addition of the symbols here

https://github.com/ghc/ghc/commit/686e72253aed3880268dd6858eadd8c320f09e97#d... https://nam06.safelinks.protection.outlook.com/?url=https%3A%2F%2Fgithub.com%2Fghc%2Fghc%2Fcommit%2F686e72253aed3880268dd6858eadd8c320f09e97%23diff-03f5bc5a50fd8ae13e902782c4392c38R1159&data=02%7C01%7Csimonpj%40microsoft.com%7C39f8b294c72e460d79fe08d827e6fa9b%7C72f988bf86f141af91ab2d7cd011db47%7C1%7C0%7C637303220283532757&sdata=C8UXF5FKuQ3MuoRuV5UgOH2bftZ3GMgXiKx4B1BAtZM%3D&reserved=0

You should be able to just comment them out. I’ll prepare a proper fix.

Cheers,

Moritz

On Tue, 14 Jul 2020 at 6:41 PM, Simon Peyton Jones via ghc-devs < ghc-devs@haskell.org> wrote:

I’m getting this failure in a clean HEAD build. Any ideas? I’m totally stalled because I can’t build GHC any more.

I’m using Windows Subsystem for Linux (WSL).

Help help!

Thanks

Simon

/home/simonpj/code/HEAD-9/rts/dist/build/libHSrts_thr_p.a(RtsSymbols.thr_p_o): RtsSymbols.c:rtsSyms: error: undefined reference to '__stack_chk_guard'

collect2: error: ld returned 1 exit status

`cc' failed in phase `Linker'. (Exit code: 1)

utils/iserv/ghc.mk:105 https://nam06.safelinks.protection.outlook.com/?url=http%3A%2F%2Fghc.mk%3A105%2F&data=02%7C01%7Csimonpj%40microsoft.com%7C39f8b294c72e460d79fe08d827e6fa9b%7C72f988bf86f141af91ab2d7cd011db47%7C1%7C0%7C637303220283542753&sdata=BRO3xbuVoyYupwHcYZf0QUnvNG4obhyfMQt8OYEVkBw%3D&reserved=0: recipe for target 'utils/iserv/stage2_p/build/tmp/ghc-iserv-prof' failed

make[1]: *** [utils/iserv/stage2_p/build/tmp/ghc-iserv-prof] Error 1

make[1]: *** Waiting for unfinished jobs....

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