add linux support

src/pch.h

@@ -84,6 +84,25 @@
     #define PP_OS "win"
     #define __block
 
+#elif __linux__
+
+#ifdef _DEBUG
+    #define GLAD_DEBUG
+#endif
+    #include <glad/glad.h>
+    //#include <glad/glad_glx.h>
+    
+    #include <sys/stat.h>
+    #include <sys/types.h>
+    #include <dirent.h>
+
+    #define __LINUX__ 1
+    #define SHADER_VERSION "#version 150\n"
+    #define PP_OS "linux"
+    #define __GL__ 1
+    #define __block
+    #define BT_SetTerminate void
+
 #endif
 
 #define SIXPLETTE(I) {I, I, I, I, I, I}