Reflect debug mode build in flags hash.

src/flags.cc

Index: src/flags.cc
diff --git a/src/flags.cc b/src/flags.cc
index 5e33bdaeec8862ab4249a221f84c60703e9e3401..d498c28240488916d96ce8e7560328682981d31a 100644
--- a/src/flags.cc
+++ b/src/flags.cc
@@ -553,6 +553,9 @@ void FlagList::EnforceFlagImplications() {
 
 uint32_t FlagList::Hash() {
   std::ostringstream modified_args_as_string;
+#ifdef DEBUG
+  modified_args_as_string << "debug";
+#endif  // DEBUG

[vogelheim, 2015/02/19 12:49:05]

Not sure if this is the best location for this... But I guess it's fine, since
this is only used for the snapshot/code caching checks anyhow.

[Yang, 2015/02/19 12:51:07]

My reasoning is that debug mode is a build time *flag*, so... :)

   for (size_t i = 0; i < num_flags; ++i) {
     Flag* current = &flags[i];
     if (!current->IsDefault()) {