feat(gx): add incomplete 'CGxDeviceGLSDL' (#2)

* chore(build): add vendored SDL 3.0.0 library

* chore(build): add vendored glew-cmake-2.2.0 library

* feat(console): in the presence of -opengl launch flag, change GxApi to OpenGl

* feat(gx): add uncompleted CGxDeviceGLSDL targeting Windows and Linux

* chore(build): change SDL3 linkage from shared (bad) to to static (good)

vendor/sdl-3.0.0/src/test/SDL_test_log.c

@@ -0,0 +1,111 @@
+/*
+  Simple DirectMedia Layer
+  Copyright (C) 1997-2023 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.
+*/
+
+/*
+
+ Used by the test framework and test cases.
+
+*/
+
+/* quiet windows compiler warnings */
+#if defined(_MSC_VER) && !defined(_CRT_SECURE_NO_WARNINGS)
+#define _CRT_SECURE_NO_WARNINGS
+#endif
+#include <SDL3/SDL_test.h>
+
+#include <time.h> /* Needed for localtime() */
+
+/* work around compiler warning on older GCCs. */
+#if (defined(__GNUC__) && (__GNUC__ <= 2))
+static size_t strftime_gcc2_workaround(char *s, size_t max, const char *fmt, const struct tm *tm)
+{
+    return strftime(s, max, fmt, tm);
+}
+#ifdef strftime
+#undef strftime
+#endif
+#define strftime strftime_gcc2_workaround
+#endif
+
+/**
+ * Converts unix timestamp to its ascii representation in localtime
+ *
+ * Note: Uses a static buffer internally, so the return value
+ * isn't valid after the next call of this function. If you
+ * want to retain the return value, make a copy of it.
+ *
+ * \param timestamp A Timestamp, i.e. time(0)
+ *
+ * \return Ascii representation of the timestamp in localtime in the format '08/23/01 14:55:02'
+ */
+static const char *SDLTest_TimestampToString(const time_t timestamp)
+{
+    time_t copy;
+    static char buffer[64];
+    struct tm *local;
+    size_t result = 0;
+
+    SDL_memset(buffer, 0, sizeof(buffer));
+    copy = timestamp;
+    local = localtime(&copy);
+    result = strftime(buffer, sizeof(buffer), "%x %X", local);
+    if (result == 0) {
+        return "";
+    }
+
+    return buffer;
+}
+
+/*
+ * Prints given message with a timestamp in the TEST category and INFO priority.
+ */
+void SDLTest_Log(SDL_PRINTF_FORMAT_STRING const char *fmt, ...)
+{
+    va_list list;
+    char logMessage[SDLTEST_MAX_LOGMESSAGE_LENGTH];
+
+    /* Print log message into a buffer */
+    SDL_memset(logMessage, 0, SDLTEST_MAX_LOGMESSAGE_LENGTH);
+    va_start(list, fmt);
+    (void)SDL_vsnprintf(logMessage, SDLTEST_MAX_LOGMESSAGE_LENGTH - 1, fmt, list);
+    va_end(list);
+
+    /* Log with timestamp and newline */
+    SDL_LogMessage(SDL_LOG_CATEGORY_TEST, SDL_LOG_PRIORITY_INFO, " %s: %s", SDLTest_TimestampToString(time(0)), logMessage);
+}
+
+/*
+ * Prints given message with a timestamp in the TEST category and the ERROR priority.
+ */
+void SDLTest_LogError(SDL_PRINTF_FORMAT_STRING const char *fmt, ...)
+{
+    va_list list;
+    char logMessage[SDLTEST_MAX_LOGMESSAGE_LENGTH];
+
+    /* Print log message into a buffer */
+    SDL_memset(logMessage, 0, SDLTEST_MAX_LOGMESSAGE_LENGTH);
+    va_start(list, fmt);
+    (void)SDL_vsnprintf(logMessage, SDLTEST_MAX_LOGMESSAGE_LENGTH - 1, fmt, list);
+    va_end(list);
+
+    /* Log with timestamp and newline */
+    SDL_LogMessage(SDL_LOG_CATEGORY_TEST, SDL_LOG_PRIORITY_ERROR, "%s: %s", SDLTest_TimestampToString(time(0)), logMessage);
+}