openframeworks
Undefined symbols in poco library
Hi everyone, ofxPoco is not working on my machine (latest pull from main git, and from apotecary submodule, recent ./download_libs.sh) macOS 10.14.6 Xcode 11.3.1
I get the following error:
Undefined symbols for architecture x86_64: "___darwin_check_fd_set_overflow", referenced from: Poco::Net::SocketImpl::poll(Poco::Timespan const&, int) in PocoNet.a(SocketImpl.o) ld: symbol(s) not found for architecture x86_64
Seems the same problem as curl had some days ago, compatibility issues with older xcode versions: https://github.com/openframeworks/apothecary/issues/176.
Eduard
Hi @eduardfrigola
were you able to fix this?
I also run into it and from what I read it is a problem with xcode.
Although I was able to compile and run by adding the following
-Wl,-U,___darwin_check_fd_set_overflow as a linker flag. In Xcode go to the build settings and add it to "Other Linker Flags".
No idea what implications this has.
Hi @roymacdonald ! What I did is copying the poco libraries from of10.x release, as they are not updated for bigsur, that has the new xcode version... And no darwin error with them.
Hmmm, interesting. So the problem has to do with which OS SDK the Poco library was compiled?
I think who knows what everything means is @ofTheo, seeing his insights on this for curl lib in this issue #176
sure. I checked the ofxPoco libs from 0.10.1 and all the headers are the same as the ones in the newest release but the compiled libs are all different, so I guess that in which OS it is compiled matters