Arch Linux

Description:
Since GCC was updated to 4.9, some programs that use the wxgtk library cannot be built anymore on ArchLinux. The main example I can give is aur/dolphin-emu-git.

I'm part of the dolphin-emu development team, our current understanding of the issue is that this is a GCC regression, see https://gcc.gnu.org/bugzilla/show_bug.cgi?id=61214 that we reported. Basically, GCC is not instantiating some inline functions when it should, and since the definitions in the wxgtk .so are hidden by -fvisibility-inlines-hidden, building programs that use wxgtk might fail at the link stage.

Rebuilding wxgtk from ABS with --disable-visibility passed to the ./configure script fixes the issue.

Additional info:
* wxgtk 3.0.0-3

Steps to reproduce:
$ cat >testcase.cpp <<EOF
#include <wx/event.h>

int main()
{
wxEvent* evt = new wxNotifyEvent();
evt->Clone();
return 0;
}
EOF
$ g++ -std=c++11 -O3 $(wx-config --cxxflags --libs) testcase.cpp

This fails with the current extra/wxgtk package, succeeds with my custom version built with --disable-visibility.