FS#71509 - [libretro-dolphin] Failed to open libretro core - undefined symbol
Attached to Project:
Community Packages
Opened by Arthur Borsboom (ArthurBorsboom) - Wednesday, 14 July 2021, 19:54 GMT
Last edited by Maxime Gauduin (Alucryd) - Thursday, 29 July 2021, 15:42 GMT
Opened by Arthur Borsboom (ArthurBorsboom) - Wednesday, 14 July 2021, 19:54 GMT
Last edited by Maxime Gauduin (Alucryd) - Thursday, 29 July 2021, 15:42 GMT
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Details
After updating Arch libretro does not seem to work anymore;
it returns instantly.
Looking at the error in the retroarch.log I am guessing that libretro-dolphin needs to be recompiled against newer libraries. [ERROR] Failed to open libretro core: "/usr/lib/libretro/dolphin_libretro.so" Error(s): /usr/lib/libretro/dolphin_libretro.so: undefined symbol: _ZN3fmt2v76detail10vformat_toIcEEvRNS1_6bufferIT_EENS0_17basic_string_viewIS4_EENS0_17basic_format_argsINS0_20basic_fo It might also be just a misconfiguration on my system, so please don't take my word for it. ;-) ** retroarch 1.9.6-2 ** libretro-dolphin 32990-1 The retroarch.log is attached. Steps to reproduce: Start libretro: /usr/bin/retroarch -L /usr/lib/libretro/dolphin_libretro.so /share/roms/wii/myrom.iso 
retroarch.log
(1 KiB)
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This task depends upon
Closed by Maxime Gauduin (Alucryd)
Thursday, 29 July 2021, 15:42 GMT
Reason for closing: Fixed
Additional comments about closing: 32990-3
Thursday, 29 July 2021, 15:42 GMT
Reason for closing: Fixed
Additional comments about closing: 32990-3
* Using GCC 10 instead of Clang
* Downgrading to older versions / older commits
What did work is the following.
* Downgrade package fmt 8.0.0-2 --> 7.1.3-1
* Recompile package libretro-dolphin
Is this an issue in fmt, in libretro-dolphin, or both?
And more importantly how to fix this?
The fmt package has been released with a bug (the namespace was unchanged), resulting in all kinds of compile warnings, compile errors and probably run-time errors, like the one in this bug report.
* Source: https://github.com/fmtlib/fmt/issues/2374
Because of this mistake, a new version of fmt has been released.
* Source: https://github.com/fmtlib/fmt/releases/tag/8.0.1
I have upgraded fmt to 8.0.1, which is currently in staging.
* Source: https://archlinux.org/packages/staging/x86_64/fmt/
After that I have recompiled libretro-dolphin and it works.
I guess the solution is to wait until fmt 8.0.1 gets out of staging and then recompile and release the libretro-dolphin package.
I updated from 32989-1 to 32990-3, and noticed the core no longer loads with error logs as follows:
[ERROR] [Core Info] Failed to write to core info cache file: /usr/share/libretro/info/core_info.cache
[ERROR] Failed to open libretro core: "/usr/lib/libretro/dolphin_libretro.so"
[ERROR] Error(s): /usr/lib/libretro/dolphin_libretro.so: undefined symbol: _ZN3fmt2v86detail10basic_dataIvE19left_padding_shiftsE
I'm also using retroarch 1.9.6-3, in case that information is useful for anything.
After updating fmt to 8.0.1 the problems have been resolved for me.
Which version of fmt are you using?
After doing a system update, which brought fmt to 8.0.1-1, the issue went away.