Add SDL2 sources

SDL2-2.0.12/include/SDL_config.h.in

@@ -1,6 +1,6 @@
 /*
   Simple DirectMedia Layer
-  Copyright (C) 1997-2017 Sam Lantinga <slouken@libsdl.org>
+  Copyright (C) 1997-2020 Sam Lantinga <slouken@libsdl.org>
 
   This software is provided 'as-is', without any express or implied
   warranty.  In no event will the authors be held liable for any damages
@@ -33,7 +33,7 @@
 
 /* Make sure that this isn't included by Visual C++ */
 #ifdef _MSC_VER
-#error You should run hg revert SDL_config.h 
+#error You should run hg revert SDL_config.h
 #endif
 
 /* C language features */
@@ -50,43 +50,32 @@
 #undef HAVE_GCC_ATOMICS
 #undef HAVE_GCC_SYNC_LOCK_TEST_AND_SET
 
-#undef HAVE_DDRAW_H
-#undef HAVE_DINPUT_H
-#undef HAVE_DSOUND_H
-#undef HAVE_DXGI_H
-#undef HAVE_XINPUT_H
-#undef HAVE_XINPUT_GAMEPAD_EX
-#undef HAVE_XINPUT_STATE_EX
-
 /* Comment this if you want to build without any C library requirements */
 #undef HAVE_LIBC
 #if HAVE_LIBC
 
 /* Useful headers */
-#undef HAVE_ALLOCA_H
-#undef HAVE_SYS_TYPES_H
-#undef HAVE_STDIO_H
 #undef STDC_HEADERS
-#undef HAVE_STDLIB_H
-#undef HAVE_STDARG_H
-#undef HAVE_MALLOC_H
-#undef HAVE_MEMORY_H
-#undef HAVE_STRING_H
-#undef HAVE_STRINGS_H
-#undef HAVE_WCHAR_H
-#undef HAVE_INTTYPES_H
-#undef HAVE_STDINT_H
+#undef HAVE_ALLOCA_H
 #undef HAVE_CTYPE_H
-#undef HAVE_MATH_H
+#undef HAVE_FLOAT_H
 #undef HAVE_ICONV_H
+#undef HAVE_INTTYPES_H
+#undef HAVE_LIMITS_H
+#undef HAVE_MALLOC_H
+#undef HAVE_MATH_H
+#undef HAVE_MEMORY_H
 #undef HAVE_SIGNAL_H
-#undef HAVE_ALTIVEC_H
+#undef HAVE_STDARG_H
+#undef HAVE_STDINT_H
+#undef HAVE_STDIO_H
+#undef HAVE_STDLIB_H
+#undef HAVE_STRINGS_H
+#undef HAVE_STRING_H
+#undef HAVE_SYS_TYPES_H
+#undef HAVE_WCHAR_H
 #undef HAVE_PTHREAD_NP_H
-#undef HAVE_LIBUDEV_H
-#undef HAVE_DBUS_DBUS_H
-#undef HAVE_IBUS_IBUS_H
-#undef HAVE_FCITX_FRONTEND_H
-#undef HAVE_LIBSAMPLERATE_H
+#undef HAVE_LIBUNWIND_H
 
 /* C library functions */
 #undef HAVE_MALLOC
@@ -110,11 +99,13 @@
 #undef HAVE_WCSLEN
 #undef HAVE_WCSLCPY
 #undef HAVE_WCSLCAT
+#undef HAVE_WCSDUP
+#undef HAVE_WCSSTR
 #undef HAVE_WCSCMP
+#undef HAVE_WCSNCMP
 #undef HAVE_STRLEN
 #undef HAVE_STRLCPY
 #undef HAVE_STRLCAT
-#undef HAVE_STRDUP
 #undef HAVE__STRREV
 #undef HAVE__STRUPR
 #undef HAVE__STRLWR
@@ -123,6 +114,8 @@
 #undef HAVE_STRCHR
 #undef HAVE_STRRCHR
 #undef HAVE_STRSTR
+#undef HAVE_STRTOK_R
+#undef HAVE_STRTOK_S
 #undef HAVE_ITOA
 #undef HAVE__LTOA
 #undef HAVE__UITOA
@@ -147,19 +140,36 @@
 #undef HAVE_SNPRINTF
 #undef HAVE_VSNPRINTF
 #undef HAVE_M_PI
-#undef HAVE_ATAN
-#undef HAVE_ATAN2
 #undef HAVE_ACOS
+#undef HAVE_ACOSF
 #undef HAVE_ASIN
+#undef HAVE_ASINF
+#undef HAVE_ATAN
+#undef HAVE_ATANF
+#undef HAVE_ATAN2
+#undef HAVE_ATAN2F
 #undef HAVE_CEIL
+#undef HAVE_CEILF
 #undef HAVE_COPYSIGN
+#undef HAVE_COPYSIGNF
 #undef HAVE_COS
 #undef HAVE_COSF
+#undef HAVE_EXP
+#undef HAVE_EXPF
 #undef HAVE_FABS
+#undef HAVE_FABSF
 #undef HAVE_FLOOR
+#undef HAVE_FLOORF
+#undef HAVE_FMOD
+#undef HAVE_FMODF
 #undef HAVE_LOG
+#undef HAVE_LOGF
+#undef HAVE_LOG10
+#undef HAVE_LOG10F
 #undef HAVE_POW
+#undef HAVE_POWF
 #undef HAVE_SCALBN
+#undef HAVE_SCALBNF
 #undef HAVE_SIN
 #undef HAVE_SINF
 #undef HAVE_SQRT
@@ -184,13 +194,32 @@
 #undef HAVE_SEM_TIMEDWAIT
 #undef HAVE_GETAUXVAL
 #undef HAVE_POLL
+#undef HAVE__EXIT
 
 #else
-#define HAVE_STDARG_H   1
-#define HAVE_STDDEF_H   1
-#define HAVE_STDINT_H   1
+#define HAVE_STDARG_H 1
+#define HAVE_STDDEF_H 1
+#define HAVE_STDINT_H 1
 #endif /* HAVE_LIBC */
 
+#undef HAVE_ALTIVEC_H
+#undef HAVE_DBUS_DBUS_H
+#undef HAVE_FCITX_FRONTEND_H
+#undef HAVE_IBUS_IBUS_H
+#undef HAVE_IMMINTRIN_H
+#undef HAVE_LIBSAMPLERATE_H
+#undef HAVE_LIBUDEV_H
+
+#undef HAVE_DDRAW_H
+#undef HAVE_DINPUT_H
+#undef HAVE_DSOUND_H
+#undef HAVE_DXGI_H
+#undef HAVE_XINPUT_H
+#undef HAVE_MMDEVICEAPI_H
+#undef HAVE_AUDIOCLIENT_H
+#undef HAVE_XINPUT_GAMEPAD_EX
+#undef HAVE_XINPUT_STATE_EX
+
 /* SDL internal assertion support */
 #undef SDL_DEFAULT_ASSERT_LEVEL
 
@@ -202,6 +231,7 @@
 #undef SDL_FILE_DISABLED
 #undef SDL_JOYSTICK_DISABLED
 #undef SDL_HAPTIC_DISABLED
+#undef SDL_SENSOR_DISABLED
 #undef SDL_LOADSO_DISABLED
 #undef SDL_RENDER_DISABLED
 #undef SDL_THREADS_DISABLED
@@ -243,7 +273,6 @@
 #undef SDL_AUDIO_DRIVER_SUNAUDIO
 #undef SDL_AUDIO_DRIVER_WASAPI
 #undef SDL_AUDIO_DRIVER_WINMM
-#undef SDL_AUDIO_DRIVER_XAUDIO2
 
 /* Enable various input drivers */
 #undef SDL_INPUT_LINUXEV
@@ -259,13 +288,19 @@
 #undef SDL_JOYSTICK_WINMM
 #undef SDL_JOYSTICK_USBHID
 #undef SDL_JOYSTICK_USBHID_MACHINE_JOYSTICK_H
+#undef SDL_JOYSTICK_HIDAPI
 #undef SDL_JOYSTICK_EMSCRIPTEN
 #undef SDL_HAPTIC_DUMMY
+#undef SDL_HAPTIC_ANDROID
 #undef SDL_HAPTIC_LINUX
 #undef SDL_HAPTIC_IOKIT
 #undef SDL_HAPTIC_DINPUT
 #undef SDL_HAPTIC_XINPUT
 
+/* Enable various sensor drivers */
+#undef SDL_SENSOR_ANDROID
+#undef SDL_SENSOR_DUMMY
+
 /* Enable various shared object loading systems */
 #undef SDL_LOADSO_DLOPEN
 #undef SDL_LOADSO_DUMMY
@@ -297,9 +332,6 @@
 #undef SDL_VIDEO_DRIVER_WAYLAND_DYNAMIC_EGL
 #undef SDL_VIDEO_DRIVER_WAYLAND_DYNAMIC_CURSOR
 #undef SDL_VIDEO_DRIVER_WAYLAND_DYNAMIC_XKBCOMMON
-#undef SDL_VIDEO_DRIVER_MIR
-#undef SDL_VIDEO_DRIVER_MIR_DYNAMIC
-#undef SDL_VIDEO_DRIVER_MIR_DYNAMIC_XKBCOMMON
 #undef SDL_VIDEO_DRIVER_X11
 #undef SDL_VIDEO_DRIVER_RPI
 #undef SDL_VIDEO_DRIVER_KMSDRM
@@ -338,6 +370,7 @@
 #undef SDL_VIDEO_RENDER_OGL_ES
 #undef SDL_VIDEO_RENDER_OGL_ES2
 #undef SDL_VIDEO_RENDER_DIRECTFB
+#undef SDL_VIDEO_RENDER_METAL
 
 /* Enable OpenGL support */
 #undef SDL_VIDEO_OPENGL
@@ -354,6 +387,9 @@
 /* Enable Vulkan support */
 #undef SDL_VIDEO_VULKAN
 
+/* Enable Metal support */
+#undef SDL_VIDEO_METAL
+
 /* Enable system power support */
 #undef SDL_POWER_LINUX
 #undef SDL_POWER_WINDOWS
@@ -376,6 +412,8 @@
 /* Enable assembly routines */
 #undef SDL_ASSEMBLY_ROUTINES
 #undef SDL_ALTIVEC_BLITTERS
+#undef SDL_ARM_SIMD_BLITTERS
+#undef SDL_ARM_NEON_BLITTERS
 
 /* Enable ime support */
 #undef SDL_USE_IME
@@ -383,6 +421,9 @@
 /* Enable dynamic udev support */
 #undef SDL_UDEV_DYNAMIC
 
+/* Enable dynamic libusb support */
+#undef SDL_LIBUSB_DYNAMIC
+
 /* Enable dynamic libsamplerate support */
 #undef SDL_LIBSAMPLERATE_DYNAMIC