Declaration of crypt

[Ken Brown <kbrown at cornell dot edu>]

According to Posix, including <unistd.h> should bring in the declaration 
of crypt.  The glibc and FreeBSD headers are consistent with this, but 
Cygwin's aren't.

$ cat test.c
#include <unistd.h>

int
main (void)
{
  const char *key = NULL;
  const char *salt = NULL;
  crypt (key, salt);
}

$ gcc -c test.c
test.c: In function âmainâ:
test.c:8:3: warning: implicit declaration of function âcryptâ 
[-Wimplicit-function-declaration]
   crypt (key, salt);
   ^

The attached patch is one way to fix this.  It means that cygwin-devel 
would have to require libcrypt-devel.

I'm not sure if I used the right feature-test macro in the patch.  It's 
marked XSI by Posix, but using __XSI_VISIBLE didn't work.

Ken

P.S. Is cygwin-patches OK for this sort of thing, or should I have sent 
it to the newlib list?

Attachment: 0001-Make-unistd.h-declare-crypt.patch
Description: Text document