steam+primus does not find symbol

[Holysword]

Whenever I try to start a Steam game via primusrun %command% I get the following error in the console:

[Hu]

The missing symbol is the post-update name. I suspect that the program is somehow finding a pre-upgrade libstdc++. Steam is notorious for bundling libraries they should not, so this would explain why your basic GLX test works correctly, but your Steam game fails. What is the output of (cd /path/to/steam/files && find . -name libstdc++\* -ls)? I used a cd to anonymize the path. Otherwise you could have given the path instead of ..

In some cases, users have reported success by denying Steam access to the bundled copy and forcing it to use the system copy instead. Keep a backup of the file if you try this, since it is a context-dependent solution and we currently do not know if that will help.

[Holysword]

[Hu]

I am not aware of one. Perhaps you could get the Steam developers (not the Gentoo maintainers for Steam, but Valve's employees) to fix their workflow. They should have updated to gcc-5 by now. They also shouldn't be bundling so many libraries, but convincing them of their error there is unlikely.

[Holysword]

[Hu]

Mixing gcc4 with gcc6 should be fine if they stick to supported interfaces. There will be problems, like the ones you saw here, if they rely on symbols which changed ABI. The only solution is for someone to rebuild the code with the new ABI. We can't do that for them since they refuse to release the source, so the problem falls to them. In most cases, a straight rebuild is all that is required. No code changes, so this should be very easy for them to do.

[Holysword]

[Hu]

Steam already bundles plenty of libraries. It shouldn't be a big issue for them to bundle multiple versions of libstdc++ and select which to use based on whether the game has been updated.

I'd definitely like to see more Steam games statically link libstdc++ though. As I read the libstdc++ license, static linking it would obligate them to license the main executable under the GNU General Public License, at which point they'd have to release the source to customers, and then we could rebuild it with the proper options.

[Holysword]

[Hu]

I am not aware of anything more than a simple rebuild required for this upgrade. If the vendor has kept its build system in order, that should be trivial for them to do. This differs a bit from some open source libraries that are infamous for frequently changing their API, which would impose an actual burden on the vendor.

As far as I know, the gcc developers have never promised that you could do what Steam does and expect it to keep working long term. Steam ought either to bundle all the libraries it needs, or bundle nothing and have a policy for rebuilding when libraries update. Bundling some things and not others is an invitation for trouble.

I am also unaware of any proprietary vendors that have publicly requested any assistance in this area. Since the vendors never asked for help, and gcc never promised it, it seems to me that the fault lies squarely on the vendors who failed to prepare for this, either by asking gcc to handle it differently, by refraining from use of libstdc++, or by preparing to rebuild as needed. Note also that gcc-5 was released April 2015. Vendors have now had more than 2 years to do a fairly simple upgrade. If they can't even do that, they're probably not supporting the game at all, even for serious bugs or security issues.

[Satarsa]

[Mgiese]

hi there,

first of all, what is optirun ?

i encounter this error when lauchnching civilization 6. which was working flawlessly last time i checked 2 months ago but now this :

[Mgiese]

hi, got it to work with