Re: Using rand_r

[Nicholas Sherlock <n dot sherlock at gmail dot com>]

David Billinghurst wrote:
> Nicholas Sherlock wrote:
>> Hey everyone,
>>
>> I'm trying to use the function rand_r with gcc-4 in Cygwin 1.7, all 
my packages are up to date. It's supposed to be defined in stdlib.h, and 
I can see it there. But if I compile a program which uses it, I get:
>>
>> warning: implicit declaration of function 'rand_r'.
>>
>> The reason seems to be the check for #ifndef __STRICT_ANSI__ in 
stdlib.h. Even though I'm compiling with -std=c99, __STRICT_ANSI__ still 
gets declared, so the definition of rand_r is unavailable. This seems to 
be the same problem stated here:
>
>
> Try -std=gnu99.  It doesn't define __STRICT_ANSI__
>
> This doesn't answer your question, unfortunately.

Thanks, that does solve my immediate problem. But I'm really hoping to 
compile as vanilla C99 as I can manage, since I'll also be using my code 
with non-GNU compilers.

Cheers,
Nicholas Sherlock


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