BUG #17681: Building the REL_12_13 source in Visual Studio 2013 fails.

The following bug has been logged on the website:

Bug reference:      17681
Logged by:          daisuke higuchi
Email address:      higuchi.daisuke@fujitsu.com
PostgreSQL version: Unsupported/Unknown
Operating system:   Windows 10
Description:

Hi,

I tried to build using the codes of REL_12_13 in the following environment,
but it failed.
In the same environment, building with code with REL_12_12 succeeds.

- Windows 10
- Visual Studio 2013

I know I'm using an older version of Visual Studio, but according to the
manual,
I believe it supports building with Visual Studio 2013, so I think this is
bug.

https://www.postgresql.org/docs/12/install-windows-full.html
-----------------------------------
17.1. Building with Visual C++ or the Microsoft Windows SDK

64-bit PostgreSQL builds are supported with Microsoft Windows SDK version
8.1a to 10 or Visual Studio 2013 and above.
-----------------------------------


The main messages when it fails are following:
-----------------------------------
"Z:\postgres\pgsql.sln" (default target) (1) ->
"Z:\postgres\postgres.vcxproj" (default target) (2) ->
(ClCompile target) ->
  src/port/snprintf.c(1006): warning C4013: 'snprintf' undefined; assuming
extern returning int [Z:\postgres\postgres.vcxproj]


"Z:\postgres\pgsql.sln" (default target) (1) ->
"Z:\postgres\libpqwalreceiver.vcxproj" (default target) (4) ->
"Z:\postgres\libpq.vcxproj" (default target) (5) ->
"Z:\postgres\libpgport.vcxproj" (default target) (7) ->
  src/port/snprintf.c(1006): warning C4013: 'snprintf' undefined; assuming
extern returning int [Z:\postgres\libpgport.vcxproj]


"Z:\postgres\pgsql.sln" (default target) (1) ->
"Z:\postgres\postgres.vcxproj" (default target) (2) ->
(Link target) ->
  snprintf.obj : error LNK2019: unresolved external symbol snprintf
referenced in function pg_strfromd [Z:\postgres\postgres.vcxproj]
  .\Release\postgres\postgres.exe : fatal error LNK1120: 1 unresolved
externals [Z:\postgres\postgres.vcxproj]


"Z:\postgres\pgsql.sln" (default target) (1) ->
"Z:\postgres\libpqwalreceiver.vcxproj" (default target) (4) ->
"Z:\postgres\libpq.vcxproj" (default target) (5) ->
  libpgport.lib(snprintf.obj) : error LNK2019: unresolved external symbol
snprintf referenced in function pg_strfromd [Z:\postgres\libpq.vcxproj]
  .\Release\libpq\libpq.dll : fatal error LNK1120: 1 unresolved externals
[Z:\postgres\libpq.vcxproj]
-----------------------------------

I think the cause of this error is the following commit regarding
snprintf.
As a test, I reverted this commit and built again, and the build
succeeded.

d33ac1ec2af5297b2ac8fbf89464f0c7f90a7955

Regards,
Higuchi