fixes for GCC 6:

- -Wstrict-prototypes is not available for C++, so don't try to
ignore it for C++.
- remove many _DIAGASSERT() checks against not NULL for functions
with arguments with nonnull attributes. in two cases, leave
code behind that should set defaults to "(null)".
- use -Wno-error=frame-address for i386 mcount, as it seems valid
to assume the caller will have a frame.fair

- ansify, knf.
- no functional changes

branches: 1.15.44;
Move strlen(s) to after s is known to be not NULL, or set to "(null)" .

Fixes Coverity CID 2353.

WARNS=4

If the string to be printed is NULL substitute "(null)". Approved by core.
This is a workaround to make gcc's behavior consistent, since gcc can
transform:
printf("%s\n", s) -> puts(s)
fprintf(fp, "%s", s) -> fputs(s, fp)
as an optimization.
I've left the _DIAGASSERT's that make sure that s != NULL alone because we
should really still abort in a debugging environment.

Move UCB-licensed code from 4-clause to 3-clause licence.

Patches provided by Joel Baker in PR 22280, verified by myself.

#include "local.h" to get __flockfile_internal() prototype.

back out the #ifdef _DIAGNOSTIC argument checks; too many people complained.
_DIAGASSERT() is still retained.

* use _DIAGASSERT() to check pointer arguments against NULL and file
descriptors against -1 (as appropriate).
* add actual checks which to detect stuff that would trigger_DIAGASSERT(),
and attempt to return a sane error condition.
* knf some code
* remove some `register' decls.

the first two items result in the addition of code similar to the
following in various functions:

_DIAGASSERT(path != NULL)
#ifdef _DIAGNOSTIC
if (path == NULL) {
errno = EFAULT;
return (-1);
}
#endif

delint

Deploy stdio stream locking as necessary.

Fix RCSID's
Fix gcc warnings.
Add prototypes for functions that were declared in more than one place
to local.h or extern.h and use that instead.

Add explict function return types

Merged with 4.4lite.
Changed to conform to NetBSD's new RCS Id convention.

Declare rcsid strings so they are stored in text segment.

Add RCS identifiers.

branches: 1.1.1;
Initial revision