Hello!

I'm using pd-vanilla (0.50.2-3) on ubuntu studio 20.04
It was installed by default (so I didn't build it myself).
When I try to create a sigmund~ (or even fidle~ or bonk~) object, I have this error:

/usr/lib/puredata/extra/sigmund~/sigmund~.pd_linux: /usr/lib/puredata/extra/sigmund~/sigmund~.pd_linux: undefined symbol: __pow_finite
/usr/lib/puredata/tcl/../extra/sigmund~/sigmund~.pd_linux: /usr/lib/puredata/tcl/../extra/sigmund~/sigmund~.pd_linux: undefined symbol: __pow_finite
 sigmund~
... couldn't create

There is a file /usr/lib/puredata/extra/sigmund~/sigmund~.pd_linux
I red about an almost same issue here https://github.com/pure-data/pure-data/issues/975 but didn't find a solution I may understand.
Some says this problem is common since 20.04 but didn't find any other topic about that searching on google.

Would someone have any clue?
Thx!

EDIT: I found out that on an other boot I have (MXLinux), installing puredata (which install by default in 0.43 (or 49? not sure...)) gave me sigmund~ working fine. so I tried to copy the sigmund~.pd_linux file from this build to the one on my other boot (backuping the original one of course). But it didn't work.
Maybe I could try to install an older version of PD on my ubuntu studio (I need to use it on this one, because I didn't find how to build processing for MXLinux, which is essential to my usage). But I don't know how to proceed (where to found the package, plus I'm really not good in building package successfully ...)

I'm running PD vanilla 0.50.2 on xubuntu, installed from the ubuntu repositories via apt, and it has sigmund~. I do however get a similar error message trying to create bonk~: "/usr/lib/puredata/tcl/../extra/bonk~/bonk~.pd_linux: /usr/lib/puredata/tcl/../extra/bonk~/bonk~.pd_linux: undefined symbol: __exp_finite"

In the meantime both work in my purr data installation so you could try that ?

The problem as far as I understand it is the update of the gnu c library from 2.30 to 2.31 changing how certain things are handled and these changes not being reflected in older binary distributions (.deb files). As one guy in your link says: manually compiling against glibc 2.31 fixes the bug.

So I decided to see if can could fix the issue myself. I am not much for compiling from source myself either, so I went straight to debian to look for the latest pd: https://packages.debian.org/sid/puredata
Purged my old installation including dependencies (all packages named puredata-something). Reinstalled all using the v. 0.51.4-1 .deb files from debian's page. And it worked

Well, thank you very much, this solution actually works, even if it's a bit painfull (manually downloading each dependency and install it take some times), but in the end it works, that what matter.

THX!!!