[Go] Add -cgo option, required for Go version 1.5 and later.

Lib/go/go.swg

@@ -533,7 +533,7 @@
 %typemap(directorin) enum SWIGTYPE & (intgo e)
 %{
   e = (intgo)$1;
-  $input = &e;
+  $input = ($1_ltype)&e;
 %}
 
 %typemap(godirectorin) enum SWIGTYPE & ""

Lib/go/goruntime.swg

@@ -19,21 +19,45 @@ static void Swig_free(void* p) {
 
 %}
 
+#if SWIGGO_CGO
+%insert(cgo_comment_typedefs) %{
+#include <stdint.h>
+%}
+#endif
+
 #if SWIGGO_INTGO_SIZE == 32
 %insert(runtime) %{
 typedef int intgo;
 typedef unsigned int uintgo;
 %}
+#if SWIGGO_CGO
+%insert(cgo_comment_typedefs) %{
+typedef int intgo;
+typedef unsigned int uintgo;
+%}
+#endif
 #elif SWIGGO_INTGO_SIZE == 64
 %insert(runtime) %{
 typedef long long intgo;
 typedef unsigned long long uintgo;
 %}
+#if SWIGGO_CGO
+%insert(cgo_comment_typedefs) %{
+typedef long long intgo;
+typedef unsigned long long uintgo;
+%}
+#endif
 #else
 %insert(runtime) %{
 typedef ptrdiff_t intgo;
 typedef size_t uintgo;
 %}
+#if SWIGGO_CGO
+%insert(cgo_comment_typedefs) %{
+typedef ptrdiff_t intgo;
+typedef size_t uintgo;
+%}
+#endif
 #endif
 
 %insert(runtime) %{
@@ -43,6 +67,17 @@ typedef struct { void* array; intgo len; intgo cap; } _goslice_;
 
 %}
 
+#ifdef SWIGGO_CGO
+
+%insert(cgo_comment_typedefs) %{
+
+typedef struct { char *p; intgo n; } _gostring_;
+typedef struct { void* array; intgo len; intgo cap; } _goslice_;
+
+%}
+
+#endif
+
 #ifndef SWIGGO_GCCGO
 /* Boilerplate for C/C++ code when using 6g/8g.  This code is compiled
    with gcc.  */
@@ -98,6 +133,8 @@ static void _swig_gopanic(const char *p) {
 
 %}
 
+#if !SWIGGO_CGO
+
 /* Boilerplate for C code when using 6g/8g.  This code is compiled
    with 6c/8c.  */
 %insert(gc_header) %{
@@ -111,6 +148,8 @@ void *·_cgo_runtime_cgocall = &cgocall;
 
 %}
 
+#endif
+
 #else
 
 /* Boilerplate for C/C++ code when using gccgo.  */
@@ -122,6 +161,17 @@ extern "C" {
 #endif
 extern void *_cgo_allocate(size_t);
 extern void _cgo_panic(const char *);
+#ifdef __cplusplus
+}
+#endif
+
+#define _swig_goallocate _cgo_allocate
+#define _swig_gopanic _cgo_panic
+%}
+
+#if !SWIGGO_CGO
+
+%insert(runtime) %{
 
 /* Implementations of SwigCgocall and friends for different versions
    of gccgo.  The Go code will call these functions using C names with
@@ -130,6 +180,10 @@ extern void _cgo_panic(const char *);
    version.  We assume that the version of gcc used to compile this
    file is the same as the version of gccgo.  */
 
+#ifdef __cplusplus
+extern "C" {
+#endif
+
 #define SWIG_GCC_VERSION \
   (__GNUC__ * 10000 + __GNUC_MINOR__ * 100 + __GNUC_PATCHLEVEL__)
 
@@ -184,13 +238,12 @@ void SwigCgocallBackDone() {
 }
 #endif
 
-#define _swig_goallocate _cgo_allocate
-#define _swig_gopanic _cgo_panic
-
 %}
 
 #endif
 
+#endif
+
 %insert(runtime) %{
 
 static _gostring_ _swig_makegostring(const char *p, size_t l) {
@@ -209,9 +262,11 @@ static _gostring_ _swig_makegostring(const char *p, size_t l) {
 
 %go_import("unsafe", _ "runtime/cgo")
 
+#if !SWIGGO_CGO
 %insert(go_header) %{
 var _cgo_runtime_cgocall func(unsafe.Pointer, uintptr)
 %}
+#endif
 
 #else
 
@@ -231,6 +286,8 @@ type _ unsafe.Pointer
 
 %}
 
+#if !SWIGGO_CGO
+
 /* Swig_always_false is used to conditionally assign parameters to
    Swig_escape_val so that the compiler thinks that they escape.  We
    only assign them if Swig_always_false is true, which it never is.
@@ -241,6 +298,8 @@ var Swig_escape_always_false bool
 var Swig_escape_val interface{}
 %}
 
+#endif
+
 /* Function pointers are translated by the code in go.cxx into
    _swig_fnptr.  Member pointers are translated to _swig_memberptr.  */