[Powertop] [PATCH 1/2] Fix build with C++11 support enabled

In particular, usage of __DATE__ in main.cpp is now recognized as a
user-defined literal, so an additional whitespace is required separating
the string and __DATE__.

Also, typeof (which was a GNU extension) is now replaced by decltype,
so perf/perf_bundle.cpp has been modified.
The preprocessor is used to tell whether we are compiling in C++11 mode
or not and select the keyword accordingly.
---
 src/main.cpp             |    2 +-
 src/perf/perf_bundle.cpp |    8 ++++++++
 2 files changed, 9 insertions(+), 1 deletion(-)

diff --git a/src/main.cpp b/src/main.cpp
index e168fa4..433fea6 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -80,7 +80,7 @@ static const struct option long_options[] =
 
 static void print_version()
 {
-	printf(_("Powertop version" POWERTOP_VERSION ", compiled on "__DATE__ "\n"));
+	printf(_("Powertop version" POWERTOP_VERSION ", compiled on " __DATE__ "\n"));
 }
 
 static bool set_refresh_timeout()
diff --git a/src/perf/perf_bundle.cpp b/src/perf/perf_bundle.cpp
index fc677f5..38e1e91 100644
--- a/src/perf/perf_bundle.cpp
+++ b/src/perf/perf_bundle.cpp
@@ -38,6 +38,10 @@
 
 #include "../cpu/cpu.h"
 
+#if defined(__GXX_EXPERIMENTAL_CXX0X__) || (__cplusplus >= 201103L)
+# define USE_DECLTYPE
+#endif
+
 class perf_bundle_event: public perf_event
 {
 public:
@@ -58,7 +62,11 @@ void perf_bundle_event::handle_event(struct perf_event_header *header, void *coo
 	buffer = (unsigned char *)malloc(header->size);
 	memcpy(buffer, header, header->size);
 
+#ifdef USE_DECLTYPE
+	vector = (decltype(vector))cookie;
+#else
 	vector = (typeof(vector))cookie;
+#endif
 	vector->push_back(buffer);
 }
 
-- 
1.7.10.2