Some base/ progress towards building on Linux x86-64.

base/basictypes.h

Index: base/basictypes.h
diff --git a/base/basictypes.h b/base/basictypes.h
index ae87fc074e08454ab13da69adf8565a6c392cb4e..a6378e70be20748c847f41e45c24eab2183c5a43 100644
--- a/base/basictypes.h
+++ b/base/basictypes.h
@@ -25,7 +25,14 @@ typedef short               int16;
 #define _INT32
 typedef int                 int32;
 #endif
+
+// The NSPR system headers define 64-bit as long when possible.  In order to
+// not have typedef mismatches, we do the same on LP64.
+#if __LP64__
+typedef long                int64;
+#else
 typedef long long           int64;
+#endif
 
 // NOTE: unsigned types are DANGEROUS in loops and other arithmetical
 // places.  Use the signed types unless your variable represents a bit
@@ -41,7 +48,13 @@ typedef unsigned short     uint16;
 #define _UINT32
 typedef unsigned int       uint32;
 #endif
+
+// See the comment above about NSPR and 64-bit.
+#if __LP64__
+typedef unsigned long uint64;
+#else
 typedef unsigned long long uint64;
+#endif
 
 // A type to represent a Unicode code-point value. As of Unicode 4.0,
 // such values require up to 21 bits.