Description:
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If an extension (like xdebug) uses php_log_err() the build on Windows fails with

ext\xdebug\xdebug_stack.c(172): error C2065: 'LOG_NOTICE': undeclared identifier

This is caused by the following:

php_log_err() has been removed from main/main.c and is replaced by php_log_err_with_severity()

php_log_err is now in main/php.h:

#define php_log_err(msg) php_log_err_with_severity(msg, LOG_NOTICE)

However, LOG_NOTICE is undefined on Windows when win32/syslog.h is not included (where is is defined as 6).

Test script:
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Try to compile any extension that uses php_log_err() on Windows. xdebug has some other issues, but the solution is to add these lines in any c-file that calls php_log_err():

#if defined(WIN32) && PHP_VERSION_ID >= 70100
#include "win32/syslog.h"
#endif

This is a workaround. It should be solved in core.

Expected result:
----------------
no build failure on Windows

Actual result:
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Fatal error C2065: 'LOG_NOTICE': undeclared identifier