Looks like the default makefile has the -g parameter, so debug symbols are included. Is this correct? I hope this is more useful.
[root@localhost st]# WAYLAND_DEBUG=1 gdb st
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Reading symbols from st...done.
(gdb) run
Starting program: /root/st/st
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/usr/lib/libthread_db.so.1".
[739345.719] -> wl_display@1.get_registry(new id wl_registry@2)
[739345.778] -> wl_display@1.get_registry(new id wl_registry@3)
[739345.804] -> wl_display@1.sync(new id wl_callback@4)
[739345.942] wl_display@1.delete_id(4)
[739345.998] wl_registry@3.global(1, "wl_shm", 1)
[739346.026] wl_registry@3.global(2, "wl_compositor", 3)
[739346.044] wl_registry@3.global(3, "wl_subcompositor", 1)
[739346.063] wl_registry@3.global(4, "wl_data_device_manager", 2)
[739346.083] wl_registry@3.global(5, "wl_seat", 4)
[739346.119] wl_registry@3.global(6, "wl_shell", 1)
[739346.140] wl_registry@3.global(7, "zxdg_shell_v6", 1)
[739346.159] wl_registry@3.global(8, "desktop_shell", 3)
[739346.179] wl_registry@3.global(9, "lock", 1)
[739346.197] wl_registry@3.global(10, "wl_output", 2)
[739346.217] wl_registry@3.global(11, "wl_drm", 2)
[739346.239] -> wl_registry@3.bind(11, "wl_drm", 2, new id [unknown]@5)
[739346.267] wl_callback@4.done(20609)
[739346.280] -> wl_display@1.sync(new id wl_callback@4)
[739346.332] wl_display@1.delete_id(4)
[739346.343] wl_drm@5.device("/dev/dri/card0")
[739346.380] -> wl_drm@5.authenticate(2)
[739346.389] wl_drm@5.format(875713089)
[739346.401] wl_drm@5.format(875713112)
[739346.409] wl_drm@5.format(909199186)
[739346.419] wl_drm@5.format(961959257)
[739346.428] wl_drm@5.format(825316697)
[739346.440] wl_drm@5.format(842093913)
[739346.449] wl_drm@5.format(909202777)
[739346.456] wl_drm@5.format(875713881)
[739346.463] wl_drm@5.format(842094158)
[739346.469] wl_drm@5.format(909203022)
[739346.476] wl_drm@5.format(1448695129)
[739346.483] wl_drm@5.capabilities(1)
[739346.491] wl_callback@4.done(20609)
[739346.498] -> wl_display@1.sync(new id wl_callback@4)
[739346.536] wl_display@1.delete_id(4)
[739346.546] wl_drm@5.authenticated()
[739346.551] wl_callback@4.done(20609)
# find_driver: Trying DRM driver `intel'
[739346.660] -> wl_display@1.sync(new id wl_callback@4)
[739346.673] wl_registry@2.global(1, "wl_shm", 1)
[739346.691] -> wl_registry@2.bind(1, "wl_shm", 1, new id [unknown]@6)
[739346.717] wl_registry@2.global(2, "wl_compositor", 3)
[739346.733] -> wl_registry@2.bind(2, "wl_compositor", 3, new id [unknown]@7)
[739346.753] wl_registry@2.global(3, "wl_subcompositor", 1)
[739346.770] wl_registry@2.global(4, "wl_data_device_manager", 2)
[739346.789] -> wl_registry@2.bind(4, "wl_data_device_manager", 1, new id [unknown]@8)
[739346.813] wl_registry@2.global(5, "wl_seat", 4)
[739346.831] -> wl_registry@2.bind(5, "wl_seat", 4, new id [unknown]@9)
[739346.856] wl_registry@2.global(6, "wl_shell", 1)
[739346.874] wl_registry@2.global(7, "zxdg_shell_v6", 1)
[739346.922] wl_registry@2.global(8, "desktop_shell", 3)
[739346.949] wl_registry@2.global(9, "lock", 1)
[739346.988] wl_registry@2.global(10, "wl_output", 2)
[739347.019] -> wl_registry@2.bind(10, "wl_output", 2, new id [unknown]@10)
[739347.056] wl_registry@2.global(11, "wl_drm", 2)
[739351.894] wl_display@1.delete_id(4)
[739351.942] wl_callback@4.done(20609)
[739351.964] -> wl_seat@9.get_keyboard(new id wl_keyboard@4)
[739351.977] -> wl_seat@9.get_pointer(new id wl_pointer@11)
[739351.987] -> wl_data_device_manager@8.get_data_device(new id wl_data_device@12, wl_seat@9)
# wld_font_open_pattern: Loading font file: /usr/share/fonts/TTF/DejaVuSans.ttf
# wld_font_open_pattern: Loading font file: /usr/share/fonts/TTF/DejaVuSans-Oblique.ttf
# wld_font_open_pattern: Loading font file: /usr/share/fonts/TTF/DejaVuSans-BoldOblique.ttf
# wld_font_open_pattern: Loading font file: /usr/share/fonts/TTF/DejaVuSans-Bold.ttf
[739371.215] -> wl_shm@6.create_pool(new id wl_shm_pool@13, fd 6, 4096)
[739371.532] -> wl_shm_pool@13.resize(12288)
[739371.679] -> wl_shm_pool@13.resize(28672)
[739371.892] -> wl_shm_pool@13.resize(61440)
[739372.242] -> wl_shm_pool@13.resize(126976)
[739374.442] -> wl_shm_pool@13.resize(258048)
[739374.588] -> wl_shm_pool@13.resize(520192)
[739376.575] -> wl_shm_pool@13.resize(1044480)
[739380.052] -> wl_shm_pool@13.resize(2093056)
[739404.413] -> wl_compositor@7.create_surface(new id wl_surface@14)
[739404.465] -> wl_compositor@7.create_surface(new id wl_surface@15)
Program received signal SIGSEGV, Segmentation fault.
0x00007ffff7124396 in wl_proxy_marshal_constructor () from /usr/lib/libwayland-client.so.0
(gdb) bt
#0 0x00007ffff7124396 in wl_proxy_marshal_constructor () from /usr/lib/libwayland-client.so.0
#1 0x000000000040324a in xdg_shell_get_xdg_surface (surface=<optimized out>, xdg_shell=<optimized out>)
at xdg-shell-client-protocol.h:359
#2 wlinit () at st.c:3247
#3 main (argc=0, argv=<optimized out>) at st.c:4353
Looks like the default makefile has the -g parameter, so debug symbols are included. Is this correct? I hope this is more useful.