This plugin provides a fallback implementation for all native functions that are imported by any script, allowing it to be executed without missing functions.
The fallback implementation raises AMX_ERR_NOTFOUND and prints its name, when the function is called. You can use PawnPlus to modify a particular fallback function. By default, only 256 unique fallback functions are provided (modify fallback_pool_size and recompile to increase); if more fallbacks need to be provided, a generic one is used (which doesn't print the function name).
Download the latest release for your platform to the "plugins" directory and add "NativeFallback" (or "NativeFallback.so" on Linux) to the plugins line in server.cfg.
Include NativeFallback.inc in your Pawn program to use native functions provided in this plugin, like NativeExists and MapNative.
Use Visual Studio to build the project on Windows, or make on Linux.