Found the problem. To solve it the Nim application needs to load it's shared libraries with dlopen(RTLD_GLOBAL).
Regards, Matic ________________________________ From: gtk-app-devel-list <gtk-app-devel-list-boun...@gnome.org> on behalf of Matic Kukovec via gtk-app-devel-list <gtk-app-devel-list@gnome.org> Sent: Thursday, June 28, 2018 8:34 PM To: gtk-app-devel-list@gnome.org Subject: Simple GTK3 application in Nim? Hi guys, I have a very simple application written in the Nim programming language, which transpiles to C and is then compiled with GCC on Linux. The application is very simple and uses the IUP shared library which underneath uses GTK3. Here is the code, just for reference: import os import iup iup.open(nil, nil) var font_dialog = fontDlg() font_dialog.popup(IUP_CURRENT, IUP_CURRENT) font_dialog.destroy() iup.close() When running the application, this error is thrown: $ ./test (test:6635): Gtk-WARNING **: Unknown type PangoFontFamily specified in treemodel model (test:6635): Gtk-WARNING **: Unknown type PangoFontFace specified in treemodel model (test:6635): Gtk-WARNING **: /home/pi/gtk+3.0-3.22.11/./gtk/gtkliststore.c:516: Invalid type (null) (test:6635): Gtk-WARNING **: /home/pi/gtk+3.0-3.22.11/./gtk/gtkliststore.c:516: Invalid type (null) (test:6635): GLib-GObject-CRITICAL **: g_value_type_transformable: assertion 'G_TYPE_IS_VALUE (src_type)' failed (shutdown:6635): GLib-GObject-CRITICAL **: g_value_type_transformable: assertion 'G_TYPE_IS_VALUE (src_type)' failed (test:6635): GLib-GObject-WARNING **: /build/glib2.0-F5w919/glib2.0-2.50.3/./gobject/gtype.c:4264: type id '0' is invalid (test:6635): GLib-GObject-WARNING **: can't peek value table for type '<invalid>' which is not currently referenced Traceback (most recent call last) test.nim(7) test SIGSEGV: Illegal storage access. (Attempt to read from nil?) Now the problem, as far as I can guess, is that Nim behind the scenes uses the dlopen function to link to the IUP shared library, which messes up something with GTK. I may be completely wrong on this, I drew this conclusion from this wxWidgets issue: https://trac.wxwidgets.org/ticket/16820#no1 Can someone point me in a direction of how this can be fixed, because I do not have enough experience with this subject? Thank you, Matic _______________________________________________ gtk-app-devel-list mailing list gtk-app-devel-list@gnome.org https://mail.gnome.org/mailman/listinfo/gtk-app-devel-list _______________________________________________ gtk-app-devel-list mailing list gtk-app-devel-list@gnome.org https://mail.gnome.org/mailman/listinfo/gtk-app-devel-list
