whatis DYNAMIC_NAME_CLASH_OK

[jarausch@xxxxxxxxxxxxxxxxxxx]

Hi,

I've just debugged a segment fault, when trying to load
Mike Fletcher's zperl module.

I traced it down to 
#0  module_func (m=0x100da3a8, name=0x100ad0f8 "setup_", 
    name_s=0x100ad100 "setup_%s") at module.c:468
#1  0x1005746c in setup_module (m=0x100da3a8) at module.c:482



Now in  'module_func) (module.c:452)

s= m->nam  returning  "zperl"

since configure defined DYNAMIC_NAME_CLASH_OK on my IRIX 6.5
it directly calls
fn = (Module_func) dlsym(m->handle, name);
where name = 'setup_'
Obviously that fails (since the correct symbol is  setup_zperl)
and the success of dlsym is not checked
we run into nirwana.

1.) What's the heck with DYNAMIC_NAME_CLASH_OK ?
2.) At least IRIX 6.5 obviously needs  #undef DYNAMIC_NAME_CLASH_OK
3.) checking the success of  dlsym and an error abort
    would be nicer than a segment fault, which was hard to be traced
    down

Thanks for your comments,
Helmut.

-- 
Helmut Jarausch
Lehrstuhl fuer Numerische Mathematik
Institute of Technology, RWTH Aachen
D 52056 Aachen, Germany