code review 6550058: build: make int 64 bits on amd64

src/pkg/runtime/runtime.h

 // Copyright 2009 The Go Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
 /*
  * basic types
  */
 typedef signed char             int8;
 typedef unsigned char           uint8;
 typedef signed short            int16;
 typedef unsigned short          uint16;
 typedef signed int              int32;
 typedef unsigned int            uint32;
 typedef signed long long int    int64;
 typedef unsigned long long int  uint64;
 typedef float                   float32;
 typedef double                  float64;
 
 #ifdef _64BIT
 typedef uint64          uintptr;
 typedef int64           intptr;
-typedef int32           intgo; // Go's int
-typedef uint32          uintgo; // Go's uint
+typedef int64           intgo; // Go's int
+typedef uint64          uintgo; // Go's uint
 #else
 typedef uint32          uintptr;
 typedef int32           intptr;
 typedef int32           intgo; // Go's int
 typedef uint32          uintgo; // Go's uint
 #endif
 
 /*
  * get rid of C types
  * the / / / forces a syntax error immediately,
@@ skipping 803 matching lines @@
 extern float64 runtime·neginf;
 extern uint64 ·nan;
 extern uint64 ·posinf;
 extern uint64 ·neginf;
 #define ISNAN(f) ((f) != (f))
 
 enum
 {
         UseSpanType = 1,
 };