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Tom Lane 12eee85e51 Make our usage of memset_s() conform strictly to the C11 standard. ... Per the letter of the C11 standard, one must #define __STDC_WANT_LIB_EXT1__ as 1 before including <string.h> in order to have access to memset_s(). It appears that many platforms are lenient about this, because we weren't doing it and yet the code appeared to work anyway. But we now find that with -std=c11, macOS is strict and doesn't declare memset_s, leading to compile failures since we try to use it anyway. (Given the lack of prior reports, perhaps this is new behavior in the latest SDK? No matter, we're clearly in the wrong.) In addition to the immediate problem, which could be fixed merely by adding the needed #define to explicit_bzero.c, it seems possible that our configure-time probe for memset_s() could fail in case a platform implements the function in some odd way due to this spec requirement. This concern can be fixed in largely the same way that we dealt with strchrnul() in 6da2ba1d8: switch to using a declaration-based configure probe instead of a does-it-link probe. Back-patch to v13 where we started using memset_s(). Reported-by: Lakshmi Narayana Velayudam <dev.narayana.v@gmail.com> Author: Tom Lane <tgl@sss.pgh.pa.us> Discussion: https://postgr.es/m/CAA4pTnLcKGG78xeOjiBr5yS7ZeE-Rh=FaFQQGOO=nPzA1L8yEA@mail.gmail.com Backpatch-through: 13		8 months ago
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backend	Fix function name reference in comment	8 months ago
bin	Add tab-complete for ALTER DOMAIN ADD [CONSTRAINT]	8 months ago
common	Use 'void *' for arbitrary buffers, 'uint8 *' for byte arrays	8 months ago
fe_utils	Fix incorrect format placeholders	9 months ago
include	Make our usage of memset_s() conform strictly to the C11 standard.	8 months ago
interfaces	Use 'void *' for arbitrary buffers, 'uint8 *' for byte arrays	8 months ago
makefiles	oauth: Move the builtin flow into a separate module	8 months ago
pl	Translation updates	8 months ago
port	Make our usage of memset_s() conform strictly to the C11 standard.	8 months ago
template	…
test	Fix Assert failure in XMLTABLE parser	8 months ago
timezone	Update time zone data files to tzdata release 2025b.	8 months ago
tools	Refactor ChangeVarNodesExtended() using the custom callback	8 months ago
tutorial	…
.gitignore	…
DEVELOPERS	…
Makefile	…
Makefile.global.in	oauth: Move the builtin flow into a separate module	8 months ago
Makefile.shlib	…
meson.build	…
nls-global.mk	…