Reverting visibility_control changes

Signed-off-by: CursedRock17 <[email protected]>

tf2/include/tf2/visibility_control.h

@@ -29,8 +29,35 @@
 #ifndef TF2__VISIBILITY_CONTROL_H_
 #define TF2__VISIBILITY_CONTROL_H_
 
-#warning This header is obsolete, please include tf2/visibility_control.hpp instead
+// This logic was borrowed (then namespaced) from the examples on the gcc wiki:
+//     https://gcc.gnu.org/wiki/Visibility
 
-#include <tf2/visibility_control.hpp>
+#if defined _WIN32 || defined __CYGWIN__
+  #ifdef __GNUC__
+    #define TF2_EXPORT __attribute__ ((dllexport))
+    #define TF2_IMPORT __attribute__ ((dllimport))
+  #else
+    #define TF2_EXPORT __declspec(dllexport)
+    #define TF2_IMPORT __declspec(dllimport)
+  #endif
+  #ifdef TF2_BUILDING_DLL
+    #define TF2_PUBLIC TF2_EXPORT
+  #else
+    #define TF2_PUBLIC TF2_IMPORT
+  #endif
+  #define TF2_PUBLIC_TYPE TF2_PUBLIC
+  #define TF2_LOCAL
+#else
+  #define TF2_EXPORT __attribute__ ((visibility("default")))
+  #define TF2_IMPORT
+  #if __GNUC__ >= 4
+    #define TF2_PUBLIC __attribute__ ((visibility("default")))
+    #define TF2_LOCAL  __attribute__ ((visibility("hidden")))
+  #else
+    #define TF2_PUBLIC
+    #define TF2_LOCAL
+  #endif
+  #define TF2_PUBLIC_TYPE
+#endif
 
 #endif  // TF2__VISIBILITY_CONTROL_H_