gcc: Clean-up of non-C++0x compliant code, first steps

This patch cleans up a number of minor issues aiming to get closer to
compliance with the C++0x standard as interpreted by gcc and clang
(compile with std=c++0x and -pedantic-errors). In particular, the
patch cleans up enums where the last item was succeded by a comma,
namespaces closed by a curcly brace followed by a semi-colon, and the
use of the GNU-extension typeof (replaced by templated functions). It
does not address variable-length arrays, zero-size arrays, anonymous
structs, range expressions in switch statements, and the use of long
long. The generated CPU code also has a large number of issues that
remain to be fixed, mainly related to overflows in implicit constant
conversion (due to shifts).

src/sim/byteswap.hh

@@ -42,7 +42,7 @@
 #include "base/types.hh"
 
 // This lets us figure out what the byte order of the host system is
-#if defined(linux)
+#if defined(__linux__)
 #include <endian.h>
 // If this is a linux system, lets used the optimized definitions if they exist.
 // If one doesn't exist, we pretty much get what is listed below, so it all
@@ -65,7 +65,7 @@ enum ByteOrder {BigEndianByteOrder, LittleEndianByteOrder};
 inline uint64_t
 swap_byte64(uint64_t x)
 {
-#if defined(linux)
+#if defined(__linux__)
     return bswap_64(x);
 #elif defined(__APPLE__)
     return OSSwapInt64(x);
@@ -84,7 +84,7 @@ swap_byte64(uint64_t x)
 inline uint32_t
 swap_byte32(uint32_t x)
 {
-#if defined(linux)
+#if defined(__linux__)
     return bswap_32(x);
 #elif defined(__APPLE__)
     return OSSwapInt32(x);
@@ -98,7 +98,7 @@ swap_byte32(uint32_t x)
 inline uint16_t
 swap_byte16(uint16_t x)
 {
-#if defined(linux)
+#if defined(__linux__)
     return bswap_16(x);
 #elif defined(__APPLE__)
     return OSSwapInt16(x);