[Portaudio] Depricating def for exporting functions to lib/dll.

[Alexander Moldenhauer]

Modified port audio to be able to compile and export all functions to a dll/lib file.

Have a file named “portaudiodll.h” and have this inside it:
#pragma once
/*
Additional defines added by alatnet
*/
//check which platform we are compiling to.
#if defined(__WIN32__) || defined(_WIN32) || defined(_WIN64)
#define PA_WIN_PLATFORM
#elif defined(__APPLE__) || defined(__APPLE_CC__)
#define PA_APPLE_PLATFORM
#elif defined(__GNUC__) && (!(defined(__WIN32__) || defined(_WIN32)) && !(defined(__APPLE__) || defined(__APPLE_CC__)))
#define PA_NIX_PLATFORM
#else
#error No Recognized Platform!
#endif

//see if we are using propriotary compilers.
#ifdef _MSC_VER
#define PA_VISUAL_C
#elif defined(__BORLANDC__)
#define PA_BORLANDC
#elif defined(__GNUC__) && (defined(__WIN32__) || defined(_WIN32))
#define PA_MINGW
#define PA_GNUC
#elif defined(__GNUC__)
#define PA_GNUC
#endif

//check if we are compiling to 32 or 64 bit.
#if defined(__x86_64__) || defined(_M_X64) || defined(_WIN64)
#define PA_ARCH_64
#else
#define PA_ARCH_32
#endif

//see if we are compiling with unicode support.
#if defined(_UNICODE) || defined(UNICODE)
#define PA_UNICODE
#endif

#if defined(PA_BUILD_DLL) || defined (PA_BUILD_SO) //set exports for building a dynamic library
#ifdef PA_WIN_PLATFORM
#if defined(PA_MINGW) || defined(PA_VISUAL_C)
#define PA_DLL_DECLARE __declspec(dllexport)
#define PA_DLL_EXTERN extern
#define PA_DLL_C_EXTERN extern "C"
#else
#define PA_DLL_DECLARE __attribute__ ((dllexport))
#define PA_DLL_EXTERN extern
#define PA_DLL_C_EXTERN extern "C"
#endif
#else
#ifdef PA_USE_DECLSPEC
#define PA_DLL_DECLARE __declspec(dllexport)
#define PA_DLL_EXTERN extern
#define PA_DLL_C_EXTERN extern "C"
#else
#if defined __GNUC__ && __GNUC__ >= 4
#define PA_DLL_DECLARE __attribute__ ((visibility ("default")))
#else
#define PA_DLL_DECLARE __attribute__ ((dllexport))
#endif
#define PA_DLL_EXTERN extern
#define PA_DLL_C_EXTERN extern "C"
#endif
#endif
#elif defined (PA_IMPORT_DLL) || defined (PA_IMPORT_SO) //set exports for importing a dynamic library
#ifdef PA_WIN_PLATFORM
#if defined(PA_MINGW) || defined(PA_VISUAL_C)
#define PA_DLL_DECLARE __declspec(dllimport)
#define PA_DLL_EXTERN
#define PA_DLL_C_EXTERN
#else
#define PA_DLL_DECLARE __attribute__ ((dllimport))
#define PA_DLL_EXTERN
#define PA_DLL_C_EXTERN
#endif
#else
#ifdef PA_USE_DECLSPEC
#define PA_DLL_DECLARE __declspec(dllimport)
#define PA_DLL_EXTERN
#define PA_DLL_C_EXTERN
#else
#if defined __GNUC__ && __GNUC__ >= 4
#define PA_DLL_DECLARE __attribute__ ((visibility ("default")))
#else
#define PA_DLL_DECLARE __attribute__ ((dllimport))
#endif
#define PA_DLL_EXTERN
#define PA_DLL_C_EXTERN
#endif
#endif
#else //don't set exports, compile to a .lib file
#define PA_DLL_DECLARE
#define PA_DLL_EXTERN
#define PA_DLL_C_EXTERN
#endif

From there, have each of the function listed in the def file be appended with “PA_DLL_DECLARE” at the beginning of it and enable the “PA_BUILD_DLL” declaration.
There’s also a few extra defines if anyone wants to use it.

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