| From: Rico <[EMAIL PROTECTED]> | My guess is that -O2 is good enough but sz has not been initialized so | the compiler doesn't generate debug info for it and gdb doesn't get to | see it. I may be wrong.
I don't think that that is the case. The crash happened in a use of sz, so it must have been set. My guess that -O2 could be the problem is based on the fact that once an optimizer has had at a program, there is often no unique consistent place (machine register or storage location) to look for the value of a variable so that a debugger might not know how or where to find the value. PhD theses have been written about how to co-ordinate debuggers with optimizers. But this remains a guess -- I've never tried gdb on a c++ program before. The explanation might be simpler, like something to do with name mangling. I could spend a bunch of time experimenting to figure this out, but it doesn't matter much to me and furthermore someone else surely already knows. | I vaguely recall coming across some mention of a difference between NULL | and NUL; thanks to your email I think I have finally managed to get a | grip on the answer. NULL is the C/C++ name for a null pointer constant. There is a lot of technical crap around this, but the bottom line is that you should think of NULL as a pointer value. (I could go into the technicalities for C, but you really don't want to know.) NUL is the name of the character in ASCII/ISO-646/ISO-8859/UNICODE/... encoded as 0 and used by C as the string terminator. In C, it is best written as '\0'. See the ASCII(7) manpage in most UNIX-like systems. So when I use them NULL and NUL are very different beasts. Thanks, Hugh Redelmeier [EMAIL PROTECTED] ------------------------------------------------------- The SF.Net email is sponsored by: Beat the post-holiday blues Get a FREE limited edition SourceForge.net t-shirt from ThinkGeek. It's fun and FREE -- well, almost....http://www.thinkgeek.com/sfshirt _______________________________________________ LICQ-Main mailing list [EMAIL PROTECTED] https://lists.sourceforge.net/lists/listinfo/licq-main
