Add SDL_config_emscripten.h

Currently we maintain a config file in the emscripten
repo, but this seems like what other embedded/cross
platforms do.

include/SDL_config.h

@@ -43,6 +43,8 @@
 #include "SDL_config_psp.h"
 #elif defined(__OS2__)
 #include "SDL_config_os2.h"
+#elif defined(__EMSCRIPTEN__)
+#include "SDL_config_emscripten.h"
 #else
 /* This is a minimal configuration just to get SDL running on new platforms. */
 #include "SDL_config_minimal.h"

include/SDL_config_emscripten.h

@@ -0,0 +1,183 @@
+/*
+  Simple DirectMedia Layer
+  Copyright (C) 1997-2019 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
+  arising from the use of this software.
+
+  Permission is granted to anyone to use this software for any purpose,
+  including commercial applications, and to alter it and redistribute it
+  freely, subject to the following restrictions:
+
+  1. The origin of this software must not be misrepresented; you must not
+     claim that you wrote the original software. If you use this software
+     in a product, an acknowledgment in the product documentation would be
+     appreciated but is not required.
+  2. Altered source versions must be plainly marked as such, and must not be
+     misrepresented as being the original software.
+  3. This notice may not be removed or altered from any source distribution.
+*/
+
+#ifndef _SDL_config_emscripten_h_
+#define _SDL_config_emscripten_h_
+
+#include "SDL_platform.h"
+
+/**
+ *  \file SDL_config_emscripten.h
+ *
+ *  This is a configuration that can be used to build SDL for Emscripten.
+ */
+
+#ifdef __LP64__
+#define SIZEOF_VOIDP 8
+#else
+#define SIZEOF_VOIDP 4
+#endif
+#define HAVE_GCC_ATOMICS 1
+
+/* Useful headers */
+#define HAVE_ALLOCA_H 1
+#define HAVE_SYS_TYPES_H 1
+#define HAVE_STDIO_H 1
+#define STDC_HEADERS 1
+#define HAVE_STDLIB_H 1
+#define HAVE_STDARG_H 1
+#define HAVE_MALLOC_H 1
+#define HAVE_MEMORY_H 1
+#define HAVE_STRING_H 1
+#define HAVE_STRINGS_H 1
+#define HAVE_INTTYPES_H 1
+#define HAVE_STDINT_H 1
+#define HAVE_CTYPE_H 1
+#define HAVE_MATH_H 1
+#define HAVE_ICONV_H 1
+#define HAVE_SIGNAL_H 1
+
+/* C library functions */
+#define HAVE_MALLOC 1
+#define HAVE_CALLOC 1
+#define HAVE_REALLOC 1
+#define HAVE_FREE 1
+#define HAVE_ALLOCA 1
+#define HAVE_GETENV 1
+#define HAVE_SETENV 1
+#define HAVE_PUTENV 1
+#define HAVE_UNSETENV 1
+#define HAVE_QSORT 1
+#define HAVE_ABS 1
+#define HAVE_BCOPY 1
+#define HAVE_MEMSET 1
+#define HAVE_MEMCPY 1
+#define HAVE_MEMMOVE 1
+#define HAVE_MEMCMP 1
+#define HAVE_STRLEN 1
+#define HAVE_STRDUP 1
+#define HAVE_STRCHR 1
+#define HAVE_STRRCHR 1
+#define HAVE_STRSTR 1
+#define HAVE_STRTOL 1
+#define HAVE_STRTOUL 1
+#define HAVE_STRTOLL 1
+#define HAVE_STRTOULL 1
+#define HAVE_STRTOD 1
+#define HAVE_ATOI 1
+#define HAVE_ATOF 1
+#define HAVE_STRCMP 1
+#define HAVE_STRNCMP 1
+#define HAVE_STRCASECMP 1
+#define HAVE_STRNCASECMP 1
+#define HAVE_VSSCANF 1
+#define HAVE_VSNPRINTF 1
+#define HAVE_M_PI 1
+#define HAVE_ATAN 1
+#define HAVE_ATAN2 1
+#define HAVE_ACOS 1
+#define HAVE_ASIN 1
+#define HAVE_CEIL 1
+#define HAVE_COPYSIGN 1
+#define HAVE_COS 1
+#define HAVE_COSF 1
+#define HAVE_EXP
+#define HAVE_EXPF
+#define HAVE_FABS 1
+#define HAVE_FLOOR 1
+#define HAVE_FMOD
+#define HAVE_FMODF
+#define HAVE_LOG 1
+#define HAVE_LOGF 1
+#define HAVE_LOG10 1
+#define HAVE_LOG10F 1
+#define HAVE_POW 1
+#define HAVE_SCALBN 1
+#define HAVE_SIN 1
+#define HAVE_SINF 1
+#define HAVE_SQRT 1
+#define HAVE_SQRTF 1
+#define HAVE_TAN 1
+#define HAVE_TANF 1
+#define HAVE_FSEEKO 1
+#define HAVE_FSEEKO64 1
+#define HAVE_SIGACTION 1
+#define HAVE_SA_SIGACTION 1
+#define HAVE_SETJMP 1
+#define HAVE_NANOSLEEP 1
+#define HAVE_SYSCONF 1
+#define HAVE_CLOCK_GETTIME 1
+/* #undef HAVE_GETPAGESIZE */
+#define HAVE_MPROTECT 1
+#define HAVE_ICONV 1
+
+/* SDL internal assertion support */
+/* #undef SDL_DEFAULT_ASSERT_LEVEL */
+
+#define SDL_CPUINFO_DISABLED 1
+#define SDL_HAPTIC_DISABLED 1
+#ifndef __EMSCRIPTEN_PTHREADS__
+#define SDL_THREADS_DISABLED 1
+#endif
+
+/* Enable various audio drivers */
+#define SDL_AUDIO_DRIVER_DISK 1
+#define SDL_AUDIO_DRIVER_DUMMY 1
+#define SDL_AUDIO_DRIVER_EMSCRIPTEN 1
+
+/* Enable various input drivers */
+#define SDL_JOYSTICK_EMSCRIPTEN 1
+
+/* Enable various shared object loading systems */
+#define SDL_LOADSO_DLOPEN 1
+
+/* Enable various threading systems */
+#ifdef __EMSCRIPTEN_PTHREADS__
+#define SDL_THREAD_PTHREAD 1
+#endif
+
+/* Enable various timer systems */
+#define SDL_TIMER_UNIX 1
+
+/* Enable various video drivers */
+#define SDL_VIDEO_DRIVER_EMSCRIPTEN 1
+
+#define SDL_VIDEO_RENDER_OGL_ES2 1
+
+/* Enable OpenGL support */
+/* #undef SDL_VIDEO_OPENGL */
+/* #undef SDL_VIDEO_OPENGL_ES */
+#define SDL_VIDEO_OPENGL_ES2 1
+/* #undef SDL_VIDEO_OPENGL_BGL */
+/* #undef SDL_VIDEO_OPENGL_CGL */
+#define SDL_VIDEO_OPENGL_EGL 1
+/* #undef SDL_VIDEO_OPENGL_GLX */
+/* #undef SDL_VIDEO_OPENGL_WGL */
+/* #undef SDL_VIDEO_OPENGL_OSMESA */
+/* #undef SDL_VIDEO_OPENGL_OSMESA_DYNAMIC */
+
+/* Enable system power support */
+#define SDL_POWER_EMSCRIPTEN 1
+
+/* Enable system filesystem support */
+#define SDL_FILESYSTEM_EMSCRIPTEN 1
+
+#endif /* _SDL_config_emscripten_h_ */