root@slax:/dev/shm/tmp/cinelerra-goodguy-20190916/cinelerra-5.1/bin# gdb --symbols ../cinelerra/i686/cin.debuginfo ./cin GNU gdb (GDB) 7.11.1 Copyright (C) 2016 Free Software Foundation, Inc. License GPLv3+: GNU GPL version 3 or later This is free software: you are free to change and redistribute it. There is NO WARRANTY, to the extent permitted by law. Type "show copying" and "show warranty" for details. This GDB was configured as "i586-slackware-linux". Type "show configuration" for configuration details. For bug reporting instructions, please see: . Find the GDB manual and other documentation resources online at: . For help, type "help". Type "apropos word" to search for commands related to "word"... Reading symbols from ./cin...done. (gdb) b bcwindowbase.C:465 Breakpoint 1 at 0x87b4132: file bcwindowbase.C, line 465. (gdb) run Starting program: /dev/shm/tmp/cinelerra-goodguy-20190916/cinelerra-5.1/bin/cin [Thread debugging using libthread_db enabled] Using host libthread_db library "/lib/libthread_db.so.1". Cinelerra Infinity - built: Sep 16 2019 04:39:39 git://git.cinelerra-gg.org/goodguy/cinelerra.git (c) 2006-2019 Heroine Virtual Ltd. by Adam Williams (c) 2007-2019 cin5 derivative by W.P. Morrow aka goodguy Cinelerra is free software, covered by the GNU General Public License, and you are welcome to change it and/or distribute copies of it under certain conditions. There is absolutely no warranty for Cinelerra. [New Thread 0xf1ef3b40 (LWP 15355)] Thread 1 "cin" hit Breakpoint 1, BC_WindowBase::create_window (this=0xc2b0a88, parent_window=0xc2b0a88, title=0xa4cc55f "Cinelerra: Loading", x=225, y=225, w=407, h=453, minw=407, minh=453, allow_resize=0, private_color=0, hide=1, bg_color=-1, display_name=0xa4cc572 "", window_type=0, bg_pixmap=0x0, group_it=0) at bcwindowbase.C:465 465 default_depth = DefaultDepth(display, screen); (gdb) p /x *vis $1 = {ext_data = 0x0, visualid = 0x2a9, c_class = 0x4, red_mask = 0x3ff, green_mask = 0xffc00, blue_mask = 0x3ff00000, bits_per_rgb = 0xa, map_entries = 0x400} (gdb) l 460 vis = get_glx_visual(display); 461 if( !vis ) 462 #endif 463 vis = DefaultVisual(display, screen); 464 465 default_depth = DefaultDepth(display, screen); 466 467 client_byte_order = (*(const u_int32_t*)"a ") & 0x00000001; 468 server_byte_order = (XImageByteOrder(display) == MSBFirst) ? 0 : 1; 469 (gdb) l glx_window_fb_configs Function "glx_window_fb_configs" not defined.