[Including the list in my reply as this seems of broader interest] On Mon, Jan 13, 2025 at 04:52:46PM -0600, Bill Gee wrote: > Olly, you're a wizard for remembering that bit of arcana. The command line > you suggested works. No more seg faults in loch!
Great. > I do not have any packages called "wxWidgets" installed. On Fedora they are > called wxGTK. Here is the list of packages I have: > > bgee@main2:~$ rpm -qa | grep -i wxGTK > wxGTK-i18n-3.2.6-1.fc41.noarch > wxGTK-3.2.6-1.fc41.x86_64 > wxGTK-gl-3.2.6-1.fc41.x86_64 > wxGTK-webview-3.2.6-1.fc41.x86_64 > wxGTK-media-3.2.6-1.fc41.x86_64 > wxGTK-devel-3.2.6-1.fc41.x86_64 Its upstream project name is wxWidgets - wxGTK is the flavour using GTK, which Fedora have chosen to use as their package name. > I also do not have any packages like "libglew". It might be part of the VTK > package. I see a file named vtk-glew.h. It's not part of VTK - that header seems to be some VTK layer for supporting building with different versions of glew. I don't think wxWidgets or therion uses glew so you may well not have it installed, but some other apps which use wxWidgets also use glew - I think it's necessary that wxWidgets and glew agree on whether to use EGL or not for those apps. > I will modify the launcher for loch to set the environment variable. We have a workaround in Survex's aven for this - I'd suggest something similar in loch would be helpful as it would avoid these crashes completely. I'm not easily able to test this patch actually works as I don't have Fedora but this or something like it should do the job (I have checked it compiles on a platform where the conditionals both evaluate true): diff --git a/loch/lxGUI.cxx b/loch/lxGUI.cxx index fc00b31e..41a4583c 100644 --- a/loch/lxGUI.cxx +++ b/loch/lxGUI.cxx @@ -73,7 +73,29 @@ #endif +#ifdef __WXGTK3__ +# if !(wxUSE_GLCANVAS_EGL-0) +# include <stdlib.h> + +// The GLX-based wxGLCanvas doesn't work under Wayland, and the code +// segfaults: https://github.com/wxWidgets/wxWidgets/issues/17702 +// +// Therefore we force X11 unless we're using the EGL-based wxGLCanvas +// (which was added in wxWidgets 3.1.5 and hasn't been backported to +// 3.0.x). +// +// Setting GDK_BACKEND=x11 is the recommended workaround, and it seems to +// work to set it here. GTK2 doesn't support Wayland, so doesn't need +// this. +struct ForceX11 { + ForceX11() { + setenv("GDK_BACKEND", "x11", 1); + } +}; +static ForceX11 forcex11; +# endif +#endif //////////////////////////////////////////////////////////////////////// // Main frame Cheers, Olly _______________________________________________ Therion mailing list [email protected] https://mailman.speleo.sk/listinfo/therion
