vendor:raylib: add options to link with raylib/raygui from system

Author: spitulax

vendor/raylib/raygui.odin

@@ -3,8 +3,11 @@ package raylib
 import "core:c"
 
 RAYGUI_SHARED :: #config(RAYGUI_SHARED, false)
+RAYGUI_SYSTEM :: #config(RAYGUI_SYSTEM, false)
 
-when ODIN_OS == .Windows {
+when RAYGUI_SYSTEM {
+	foreign import lib "system:raygui"
+} else when ODIN_OS == .Windows {
 	foreign import lib {
 		"windows/rayguidll.lib" when RAYGUI_SHARED else "windows/raygui.lib",
 	}

vendor/raylib/raylib.odin

@@ -100,8 +100,11 @@ MAX_TEXT_BUFFER_LENGTH :: #config(RAYLIB_MAX_TEXT_BUFFER_LENGTH, 1024)
 #assert(size_of(rune) == size_of(c.int))
 
 RAYLIB_SHARED :: #config(RAYLIB_SHARED, false)
+RAYLIB_SYSTEM :: #config(RAYLIB_SYSTEM, false)
 
-when ODIN_OS == .Windows {
+when RAYLIB_SYSTEM {
+	foreign import lib "system:raylib"
+} else when ODIN_OS == .Windows {
 	@(extra_linker_flags="/NODEFAULTLIB:" + ("msvcrt" when RAYLIB_SHARED else "libcmt"))
 	foreign import lib {
 		"windows/raylibdll.lib" when RAYLIB_SHARED else "windows/raylib.lib" ,

vendor/raylib/rlgl/rlgl.odin

@@ -113,13 +113,16 @@ import rl "../."
 VERSION :: "5.0"
 
 RAYLIB_SHARED :: #config(RAYLIB_SHARED, false)
+RAYLIB_SYSTEM :: #config(RAYLIB_SYSTEM, false)
 
 // Note: We pull in the full raylib library. If you want a truly stand-alone rlgl, then:
 // - Compile a separate rlgl library and use that in the foreign import blocks below.
 // - Remove the `import rl "../."` line
 // - Copy the code from raylib.odin for any types we alias from that package (see PixelFormat etc)
 
-when ODIN_OS == .Windows {
+when RAYLIB_SYSTEM {
+	foreign import lib "system:raylib"
+} else when ODIN_OS == .Windows {
 	@(extra_linker_flags="/NODEFAULTLIB:" + ("msvcrt" when RAYLIB_SHARED else "libcmt"))
 	foreign import lib {
 		"../windows/raylibdll.lib" when RAYLIB_SHARED else "../windows/raylib.lib" ,