Fix linking with Sun CC 5.9: function pointers for extern "C" are treated differently

The Sun CC compiler treats C functions and C++ functions differently,
as if they had a different calling sequence (they don't, but they
could). So if you declare a function in C++ having a function pointer
as a parameter, it's understood to be C++ even if it had previously
been declared as extern "C".

This could be a compiler error, though. In any case, the end result is
that WebKit fails to link because of an undefined reference to
NPN_PluginThreadAsyncCall.

"plugins/npapi.cpp", line 177: Warning (Anachronism): Formal argument 2 of type void(*)(void*) in call to WebCore::PluginMainThreadScheduler::scheduleCall(_NPP*, void(*)(void*), void*) is being passed extern "C" void(*)(void*).

There are more of these errors left in WebKit, but they are not
causing problems right now.

2 files changed, 5 insertions, 1 deletions

diff --git a/src/3rdparty/webkit/JavaScriptCore/wtf/MainThread.h b/src/3rdparty/webkit/JavaScriptCore/wtf/MainThread.h
index 01ce804..b8305b5 100644
--- a/src/3rdparty/webkit/JavaScriptCore/wtf/MainThread.h
+++ b/src/3rdparty/webkit/JavaScriptCore/wtf/MainThread.h
@@ -34,7 +34,9 @@ namespace WTF {
 
 class Mutex;
 
-typedef void MainThreadFunction(void*);
+extern "C" {
+    typedef void MainThreadFunction(void*);
+}
 
 void callOnMainThread(MainThreadFunction*, void* context);
 
diff --git a/src/3rdparty/webkit/WebCore/plugins/npapi.cpp b/src/3rdparty/webkit/WebCore/plugins/npapi.cpp
index 4135b64..d275a39 100644
--- a/src/3rdparty/webkit/WebCore/plugins/npapi.cpp
+++ b/src/3rdparty/webkit/WebCore/plugins/npapi.cpp
@@ -171,7 +171,9 @@ void NPN_PopPopupsEnabledState(NPP instance)
     pluginViewForInstance(instance)->popPopupsEnabledState();
 }
 
+extern "C" {
 void NPN_PluginThreadAsyncCall(NPP instance, void (*func) (void *), void *userData)
 {
     PluginMainThreadScheduler::scheduler().scheduleCall(instance, func, userData);
 }
+}