Embed the SDL2 libraries into vendor:sdl2

vendor/sdl2/sdl_cpuinfo.odin

@@ -0,0 +1,44 @@
+package sdl2
+
+import "core:c"
+
+when ODIN_OS == "windows" do foreign import lib "SDL2.lib"
+when ODIN_OS == "linux"   do foreign import lib "system:SDL2"
+when ODIN_OS == "darwin"  do foreign import lib "system:SDL2"
+when ODIN_OS == "freebsd" do foreign import lib "system:SDL2"
+
+/* This is a guess for the cacheline size used for padding.
+ * Most x86 processors have a 64 byte cache line.
+ * The 64-bit PowerPC processors have a 128 byte cache line.
+ * We'll use the larger value to be generally safe.
+ */
+CACHELINE_SIZE :: 128;
+
+
+@(default_calling_convention="c", link_prefix="SDL_")
+foreign lib {
+	GetCPUCount         :: proc() -> c.int ---
+	GetCPUCacheLineSize :: proc() -> c.int ---
+
+	HasRDTSC            :: proc() -> bool  ---
+	HasAltiVec          :: proc() -> bool  ---
+	HasMMX              :: proc() -> bool  ---
+	Has3DNow            :: proc() -> bool  ---
+	HasSSE              :: proc() -> bool  ---
+	HasSSE2             :: proc() -> bool  ---
+	HasSSE3             :: proc() -> bool  ---
+	HasSSE41            :: proc() -> bool  ---
+	HasSSE42            :: proc() -> bool  ---
+	HasAVX              :: proc() -> bool  ---
+	HasAVX2             :: proc() -> bool  ---
+	HasAVX512F          :: proc() -> bool  ---
+	HasARMSIMD          :: proc() -> bool  ---
+	HasNEON             :: proc() -> bool  ---
+
+	GetSystemRAM        :: proc() -> c.int ---
+
+	SIMDGetAlignment    :: proc() -> c.size_t ---
+	SIMDAlloc           :: proc(len: c.size_t) -> rawptr ---
+	SIMDRealloc         :: proc(mem: rawptr, len: c.size_t) -> rawptr ---
+	SIMDFree            :: proc(ptr: rawptr) ---
+}