Modified version of "sparseconfig.h" to fix IL2CPP build failures in Unity-generated UWP solutions for building your game for UWP (i.e., Windows Store, XBox Store, etc)

sparseconfig.h

/*
 * NOTE: This file is for internal use only.
 *       Do not use these #defines in your own program!
 */

/* MODIFIED FILE:   --------------------------------------------------------------------------------------
 * Since Unity 2022.2b versions fail when trying to build your project for Windows, UWP, etc, this file
 * must be modified with a special preprocessor directive so that IL2CPP doesn't use the incorrect headers
 * and freak out on you. I defined it just above the place where it defines the SPARSEHASH_HASH and the
 * SPARSEHASH_HASH_NO_NAMESPACE symbols. I have only tested this on Windows in Visual Studio, but there are
 * other preprocessor blocks like the one below the main one that says "POSIX build platforms" ... if by some
 * chance you are compiling on a different system and with different compiler, you may need to redefine or
 * move the directive into the appropriate block so it's not ignored by your preprocessor. In any case, you
 * just need this to be picked up by the preprocessor:
 *
 * #define _SILENCE_STDEXT_HASH_DEPRECATION_WARNINGS
 *
 * That directive should rescue you from your hell. A C#-based workaround is possible if building inside of
 * Unity itself, which can be found here: https://gist.github.com/atcarter714/6e3d93a86ae6d1f3c0606040e917ea27
 * By simply putting that in a .cs code file anywhere in your Assets folder it also solves the problem ...
 * -------------------------------------------------------------------------------------------------------- */

/* Namespace for Google classes */
#define GOOGLE_NAMESPACE  ::google

/* Stops putting the code inside the Google namespace */
#define _END_GOOGLE_NAMESPACE_  }

/* Puts following code inside the Google namespace */
#define _START_GOOGLE_NAMESPACE_   namespace google {

/***************************/
/* Windows build platforms */
/***************************/
#if defined(_MSC_VER)

#if (_MSC_VER >= 1800 )

/* the location of the header defining hash functions */
#define HASH_FUN_H  <unordered_map>

#else /* Earlier than VSC++ 2013 */ 

/* the location of the header defining hash functions */
#define HASH_FUN_H  <hash_map>
 
#endif

/* the namespace of the hash<> function */
#define HASH_NAMESPACE  stdext

/* Define to 1 if you have the <inttypes.h> header file. */
#undef HAVE_INTTYPES_H

/* Define to 1 if the system has the type `long long'. */
#define HAVE_LONG_LONG  1

/* Define to 1 if you have the `memcpy' function. */
#define HAVE_MEMCPY  1

/* Define to 1 if you have the <stdint.h> header file. */
#undef HAVE_STDINT_H

/* Define to 1 if you have the <sys/types.h> header file. */
#define HAVE_SYS_TYPES_H  1

/* Define to 1 if the system has the type `uint16_t'. */
#undef HAVE_UINT16_T

/* Define to 1 if the system has the type `u_int16_t'. */
#undef HAVE_U_INT16_T

/* Define to 1 if the system has the type `__uint16'. */
#define HAVE___UINT16  1

// --------------------------------------------------------------------------------------------------
//! Add this preprocessor directive for IL2CPP:

#define _SILENCE_STDEXT_HASH_DEPRECATION_WARNINGS

// --------------------------------------------------------------------------------------------------

/* The system-provided hash function including the namespace. */
#define SPARSEHASH_HASH  HASH_NAMESPACE::hash_compare

/* The system-provided hash function, in namespace HASH_NAMESPACE. */
#define SPARSEHASH_HASH_NO_NAMESPACE  hash_compare

/*************************/
/* POSIX build platforms */
/*************************/
#else

/* the location of the header defining hash functions */
#define HASH_FUN_H <functional>

/* the namespace of the hash<> function */
#define HASH_NAMESPACE std

/* Define to 1 if you have the <inttypes.h> header file. */
#define HAVE_INTTYPES_H 1

/* Define to 1 if the system has the type `long long'. */
#define HAVE_LONG_LONG 1

/* Define to 1 if you have the `memcpy' function. */
#define HAVE_MEMCPY 1

/* Define to 1 if you have the <stdint.h> header file. */
#define HAVE_STDINT_H 1

/* Define to 1 if you have the <sys/types.h> header file. */
#define HAVE_SYS_TYPES_H 1

/* Define to 1 if the system has the type `uint16_t'. */
#define HAVE_UINT16_T 1

/* Define to 1 if the system has the type `u_int16_t'. */
#define HAVE_U_INT16_T 1

/* Define to 1 if the system has the type `__uint16'. */
/* #undef HAVE___UINT16 */

/* The system-provided hash function including the namespace. */
#define SPARSEHASH_HASH HASH_NAMESPACE::hash

#endif

Hope this helps solve any IL2CPP build woes folks have experienced with cutting-edge Unity versions like 2022.2.XX betas.