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Re: Where is random()?
- To: Jan Tomasek <xtomasej at fel dot cvut dot cz>
- Subject: Re: Where is random()?
- From: Mumit Khan <khan at xraylith dot wisc dot edu>
- Date: Mon, 14 Dec 1998 22:17:22 -0600
- cc: "gnu-win32 at cygnus dot com" <gnu-win32 at cygnus dot com>
Jan Tomasek <xtomasej@fel.cvut.cz> writes:
> Hi,
> I'm writing one school project in C and at home I working
> under CygWin 19.2
>
> On my Linux (Debian) is on random() man page writen that it is in
> defined in stdlib.h
> * if I compile it with gcc on that linux all is ok
> * if I compile it with Cygnus gcc port I get warning:
Learning standard from man pages is as full of pitfalls as learning a new
evolving computer language from a compiler.
`random' is not standard ANSI nor is it part of POSIX. ANSI defines rand
and srand, and for anything else, unless you're willing to provide your
RNG (which I do), you can't depend on a target platform to have it.
The good news for you is that Cygwin comes with libiberty, which contains
a random function. Just add -liberty at the end of the list of libraries
when you link and you're set for now. As for the quality, that's a whole
different story.
Regards,
Mumit
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