program crashes on SIGSEGV, how debug it?

[Frantisek Hanzlik]

I compile program (on F14 i386), but this crashes after start (probably in some
initialization phase) on SEGV. After installing appropriate debuginfo packages,
its backtrace is this:

Program received signal SIGSEGV, Segmentation fault.
_dl_lookup_symbol_x (undef_name=0x30bde3 "using_xterm", undef_map=0x862e0a0,
ref=0xbffef550, symbol_scope=0x862e258, version=0x0, type_class=1, flags=1,
    skip_map=0x0) at dl-lookup.c:713
713	{
(gdb) bt
#0  _dl_lookup_symbol_x (undef_name=0x30bde3 "using_xterm", undef_map=0x862e0a0,
ref=0xbffef550, symbol_scope=0x862e258, version=0x0, type_class=1,
    flags=1, skip_map=0x0) at dl-lookup.c:713
#1  0x00110c98 in _dl_fixup (l=<value optimized out>, reloc_arg=<value optimized
out>) at dl-runtime.c:118
#2  0x001174f0 in _dl_runtime_resolve () at ../sysdeps/i386/dl-trampoline.S:37
#3  0x0030e1eb in terminal_initialize () at terminal.c:404
#4  0x080e5297 in iodev_init () at dev_list.c:107
#5  0x0805e335 in main (argc=1, argv=0xbffff764) at emu.c:426

Know anyone what about it? These points #2 - #0 are beyond all my understanding.
Maybe they are some glibc routines? Or GDB own routines?
Eventually know anyone some links/reference to cram course about this problems?

For clarification, this program is probably OK - compiled from same sources and
with same options it run on several F13/i386 machines, and, what weird, it run
on two F14/i386 PCs too. But on other two or three PCs crashes as above.

Referenced line in "terminal.c" is:

    403
    404    if (using_xterm())
    405      Video_term.change_config = term_change_config;

and function "using_xterm()" is defined in same source file as:

    305
    306 int using_xterm(void)
    307 {
    308    char *term = getenv("TERM");
    309
    310    if (term == NULL)
    311       return 0;
    312
    313    return !strncmp("xterm", term, 5) ||
    314            !strncmp("rxvt", term, 4) ||
    315            !strcmp("dtterm", term);
    316 }
    317


Many thanks in advance, Franta Hanzlik