[namor@bulldozer ~]$ gdb `which glxinfo`
GNU gdb 6.1.1 [FreeBSD]
Copyright 2004 Free Software Foundation, Inc.
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This GDB was configured as "amd64-marcel-freebsd"...(no debugging symbols found)...
(gdb) run
Starting program: /usr/local/bin/glxinfo
(no debugging symbols found)...(no debugging symbols found)...(no debugging symbols found)...(no debugging symbols found)...(no debugging symbols found)...(no debugging symbols found)...(no debugging symbols found)...(no debugging symbols found)...(no debugging symbols found)...(no debugging symbols found)...(no debugging symbols found)...(no debugging symbols found)...(no debugging symbols found)...(no debugging symbols found)...(no debugging symbols found)...[New LWP 100659]
(no debugging symbols found)...(no debugging symbols found)...(no debugging symbols found)...(no debugging symbols found)...(no debugging symbols found)...
Program received signal SIGSEGV, Segmentation fault.
[Switching to LWP 100659]
0x00000008006132a2 in _rtld_is_dlopened () from /libexec/ld-elf.so.1
(gdb) bt
#0  0x00000008006132a2 in _rtld_is_dlopened () from /libexec/ld-elf.so.1
#1  0x000000080060cc8d in _r_debug_postinit () from /libexec/ld-elf.so.1
#2  0x000000080060a46d in .text () from /libexec/ld-elf.so.1
#3  0x0000000803d39565 in _nv003glcore () from /usr/local/lib/libnvidia-glcore.so.1
#4  0x000000080399daf0 in _nv023glcore () from /usr/local/lib/libnvidia-glcore.so.1
#5  0x0000000803d1e37c in _nv015glcore () from /usr/local/lib/libnvidia-glcore.so.1
#6  0x0000000800dc44eb in glXCreateNewContext () from /usr/local/lib/libGL.so.1
#7  0x0000000800d8ce5a in .init () from /usr/local/lib/libGL.so.1
#8  0x000000080060ca9f in r_debug_state () from /libexec/ld-elf.so.1
#9  0x000000080060c0ee in __tls_get_addr () from /libexec/ld-elf.so.1
#10 0x000000080060a439 in .text () from /libexec/ld-elf.so.1
#11 0x0000000000000000 in ?? ()
(gdb)