libc: Expose mkostemp(3) to POSIX.1-2024 applications.

stdlib.h: Expose reallocarray only for POSIX 2024 or NetBSD/OpenBSD.

reallocarray(3) is new in POSIX 2024, so it should not be exposed if
you ask for an older POSIX standard like _POSIX_C_SOURCE=200

stdlib.h: Expose reallocarray only for POSIX 2024 or NetBSD/OpenBSD.

reallocarray(3) is new in POSIX 2024, so it should not be exposed if
you ask for an older POSIX standard like _POSIX_C_SOURCE=200809L.

PR standards/58741

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stdlib.h: Use same test for def. of lldiv_t as for decl. of lldiv(3).

The !_ANSI_SOURCE conditional was a leftover from before we had
_NETBSD_SOURCE in sys/featuretest.h already defined conditionall

stdlib.h: Use same test for def. of lldiv_t as for decl. of lldiv(3).

The !_ANSI_SOURCE conditional was a leftover from before we had
_NETBSD_SOURCE in sys/featuretest.h already defined conditionally on
!_ANSI_SOURCE.

So just nix the !_ANSI_SOURCE part -- and while here, reorder and
reformat the conditional around lldiv_t so it matches the conditional
around lldiv(3) byte-for-byte, just to make it more obvious.

PR standards/56402: Definition of lldiv_t with ANSI_SOURCE and
POSIX_SOURCE

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put reallocarray() in the public namespace

reallocarray() will be part of the next POSIX release, see
https://austingroupbugs.net/view.php?id=1218

adapt an errno value to match POSIX expectations

put reallocarray() in the public namespace

reallocarray() will be part of the next POSIX release, see
https://austingroupbugs.net/view.php?id=1218

adapt an errno value to match POSIX expectations

As discussed on tech-userlevel

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Remove hacky gcc2-specific alloca definition.

PR/56250: Michael Forney: mkstemp/mkdtemp not declared with
_POSIX_C_SOURCE=200809L

Avoid depending on namespace pollution in stdlib.h.

We can make a stronger guarantee than __pure.
abs/labs don't read global memory.

Make GCC 9 happier.

PR standards/53525: move getsubopt() to stdlib.h

remove recallocarray

add recallocarray (used by openssh-7.6)

add hmac(3)

Add the C11 function aligned_alloc to libc.

Move reallocarray under _OPENBSD_SOURCE where it belongs.

Introduce reallocarr(3) for easy (re)allocation of memory with overflow
checks. Compared to OpenBSD's reallocarray, makes it easier to avoid memory
leaks on allocation failures and it doesn't depend

Introduce reallocarr(3) for easy (re)allocation of memory with overflow
checks. Compared to OpenBSD's reallocarray, makes it easier to avoid memory
leaks on allocation failures and it doesn't depend on malloc(0) != NULL
for correct error checking. Compared to plain realloc, it also avoids
the problem of intermediate integer overflows. The trade-off is the use
of void * to side step C type system with regard to generic pointer to
pointer.

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add reallocarray

remove restrict to match with OpenBSD prototype (Kamil Rytarowski)

Add strtonum protected with _OPENBSD_SOURCE

add mkostemp{s,} mkstemps from FreeBSD

rename to 60

fix srandom and initstate signatures (from enh at google)

add ptsname_r

add at_quick_exit and quick_exit

Provide the long long routines for C++11 code.

Add MB_CUR_MAX_L.