mdbx: поддержка ASAN (Address Sanitizer) при сборке посредством MSVC.

src/core.c

@@ -25654,7 +25654,10 @@ __dll_export
 };
 
 #ifdef __SANITIZE_ADDRESS__
-LIBMDBX_API __attribute__((__weak__)) const char *__asan_default_options(void) {
+#if !defined(_MSC_VER) || __has_attribute(weak)
+LIBMDBX_API __attribute__((__weak__))
+#endif
+const char *__asan_default_options(void) {
   return "symbolize=1:allow_addr2line=1:"
 #if MDBX_DEBUG
          "debug=1:"

src/mdbx.c++

@@ -14,6 +14,12 @@
 #define __USE_MINGW_ANSI_STDIO 1
 #endif /* MinGW */
 
+/* Workaround for MSVC' header `extern "C"` vs `std::` redefinition bug */
+#if defined(_MSC_VER) && defined(__SANITIZE_ADDRESS__) &&                      \
+    !defined(_DISABLE_VECTOR_ANNOTATION)
+#define _DISABLE_VECTOR_ANNOTATION
+#endif /* _DISABLE_VECTOR_ANNOTATION */
+
 #include "../mdbx.h++"
 
 #include "internals.h"