Don't forget to tell our users that the epoxy GL functions are __dllimport.

This lets the compiler generate faster function calls (call through
function pointer, instead of call into a linker-generated stub func
containing jump to function pointer).

include/epoxy/gl.h

@@ -47,6 +47,7 @@ extern "C" {
 /* APIENTRY and GLAPIENTRY are not used on Linux or Mac. */
 #define APIENTRY
 #define GLAPIENTRY
+#define EPOXYAPIENTRY
 #define GLAPI
 #else
 #ifndef APIENTRY
@@ -57,6 +58,10 @@ extern "C" {
 #define GLAPIENTRY APIENTRY
 #endif
 
+#ifndef EPOXYAPIENTRY
+#define EPOXYAPIENTRY __declspec(dllimport)
+#endif
+
 #ifndef GLAPI
 #define GLAPI extern
 #endif

src/dispatch_common.h

@@ -27,6 +27,7 @@
 #define PLATFORM_HAS_EGL 0
 #define PLATFORM_HAS_GLX 0
 #define PLATFORM_HAS_WGL 1
+#define EPOXYAPIENTRY __declspec(dllexport)
 #elif defined(__APPLE__)
 #define PLATFORM_HAS_EGL 0
 #define PLATFORM_HAS_GLX 1

src/gen_dispatch.py

@@ -506,16 +506,14 @@ class Generator(object):
         self.outln(' */')
         self.outln('#ifdef _WIN32')
         self.outln('#define EPOXY_FPTR(x) x')
-        self.outln('#define EPOXY_FPTR_EXTERN')
         self.outln('#else')
         self.outln('#define EPOXY_FPTR(x) (*x)')
-        self.outln('#define EPOXY_FPTR_EXTERN extern')
         self.outln('#endif')
 
         for func in self.sorted_functions:
-            self.outln('EPOXY_FPTR_EXTERN {0} EPOXY_FPTR(epoxy_{1})({2});'.format(func.ret_type,
-                                                                                  func.name,
-                                                                                  func.args_decl))
+            self.outln('extern EPOXYAPIENTRY {0} EPOXY_FPTR(epoxy_{1})({2});'.format(func.ret_type,
+                                                                                     func.name,
+                                                                                     func.args_decl))
             self.outln('')
 
         for func in self.sorted_functions: