ARM support, with some build system changes to support x86-64, arm, and i386 in an autoconf style build in Linux. The O2 build for the unit tests is still broken but I'm checking this in to unblock people

A=nealsid
R=ajwong, hannahtang, ted.mielczarek



git-svn-id: http://google-breakpad.googlecode.com/svn/trunk@541 4c0a9323-5329-0410-9bdc-e9ce6186880e

src/client/linux/handler/exception_handler.h

@@ -34,6 +34,7 @@
 #include <string>
 
 #include <signal.h>
+#include <stdio.h>
 
 #include "client/linux/crash_generation/crash_generation_client.h"
 #include "processor/scoped_ptr.h"
@@ -42,6 +43,8 @@ struct sigaction;
 
 namespace google_breakpad {
 
+class ExceptionHandler;
+
 // ExceptionHandler
 //
 // ExceptionHandler can write a minidump file when an exception occurs,
@@ -163,7 +166,10 @@ class ExceptionHandler {
     siginfo_t siginfo;
     pid_t tid;  // the crashing thread.
     struct ucontext context;
+#if !defined(__ARM_EABI__)
+    // #ifdef this out because FP state is not part of user ABI for Linux ARM.
     struct _libc_fpstate float_state;
+#endif
   };
 
   // Returns whether out-of-process dump generation is used or not.