Hadrian: Error "cannot find -lHSrts-1.0_thr_l" when linking ghc executable.

[Sebastian Graf]

Hi Roland,

Since you mention an RTS variant with an _l suffix (for eventlog), I
suspect that you may have to (reboot? and) reconfigure after
https://gitlab.haskell.org/ghc/ghc/-/issues/18948 and
https://gitlab.haskell.org/ghc/ghc/-/merge_requests/4448.

Does that help?

Cheers,
Sebastian

Am Mi., 25. Nov. 2020 um 10:33 Uhr schrieb Roland Senn <rsx at bluewin.ch>:

> Hi there!
>
> I have two GHC trees. One is called ghcdebug and is a little bit
> outdated (16. September 2020). In this tree, I can work normally:
> Change code, compile and run the resulting GHC compiler.
>
> The second tree is up-to-date! Compiling works fine, however the linker
> steps for the ghc executable fails. When I restart the failing link
> step, I get the following error:
>
> $ hadrian/build --flavour=devel2 --freeze1 -j2 stage2:exe:ghc-bin
> Up to date
> | Run Ghc LinkHs Stage1: _build/stage1/ghc/build/c/hschooks.o (and 7
> more) => _build/stage1/bin/ghc
> /usr/bin/ld.gold: error: cannot find -lHSrts-1.0_thr_l
> _build/stage1/ghc/build/GHCi/Leak.o(.text+0xd5): error: undefined
> reference to 'stg_upd_frame_info'
> _build/stage1/ghc/build/GHCi/Leak.o(.text+0x1c2): error: undefined
> reference to 'stg_upd_frame_info'
> _build/stage1/ghc/build/GHCi/Leak.o(.text+0x1e6): error: undefined
> reference to 'stg_ap_ppp_info'
>               ...  and many many more lines with "error: undefined
> reference to ..."
>
> I get the same error when I use a freshly cloned ghc tree. I also get
> the error independently of the GHC version used to compile (8.8.3 or
> 8.10.2). I didn't modify any settings files.
>
> I do:
>    hadrian/build clean
>    hadrian/build --flavour=devel2 -j2
>
> I'm using a normal x68_64 box with plain vanilla Linux Debian 10. No
> Docker and no Nix.
>
> The directory _build/stage/rts/build contains:
>
> roland at goms:~/Projekte/ghc$ ls -all _build/stage1/rts/build/
> insgesamt 19396
> drwxr-xr-x 5 roland roland     4096 Nov 24 17:58 .
> drwxr-xr-x 3 roland roland     4096 Nov 24 17:56 ..
> drwxr-xr-x 2 roland roland     4096 Nov 24 17:56 autogen
> drwxr-xr-x 7 roland roland    12288 Nov 24 17:58 c
> drwxr-xr-x 2 roland roland     4096 Nov 24 17:58 cmm
> -rw-r--r-- 1 roland roland    31349 Nov 24 17:58 DerivedConstants.h
> -rw-r--r-- 1 roland roland    13764 Nov 24 17:57 ffi.h
> -rw-r--r-- 1 roland roland     4343 Nov 24 17:57 ffitarget.h
> -rw-r--r-- 1 roland roland    15128 Nov 24 17:58 ghcautoconf.h
> -rw-r--r-- 1 roland roland      618 Nov 24 17:58 ghcplatform.h
> -rw-r--r-- 1 roland roland      732 Nov 24 17:58 ghcversion.h
> -rw-r--r-- 1 roland roland    82486 Nov 24 17:57 libCffi.a
> lrwxrwxrwx 1 roland roland        9 Nov 24 17:57 libCffi_thr.a ->
> libCffi.a
> -rw-r--r-- 1 roland roland  9166966 Nov 24 17:58 libHSrts-1.0.a
> -rw-r--r-- 1 roland roland 10490730 Nov 24 17:58 libHSrts-1.0_thr.a
>
> Any ideas what's wrong or how to fix?
>
> Many thanks and Cheers,
>    Roland
>
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