Thu, 02 Nov 2023 21:24:43 -0500
Mark all Pidgin symbol visibility as hidden
This will match behaviour on Windows, so it will prevent not tagging the symbols with the correct export macro.
This closes [PIDGIN-17839](https://issues.imfreedom.org/issue/PIDGIN-17838), as successfully compiling with this flag means all symbols have been correctly marked.
Testing Done:
Compiled on Linux and Windows.
Bugs closed: PIDGIN-17839
Reviewed at https://reviews.imfreedom.org/r/2769/