commit 63cf241b21c768a195784f62cfab2473187c1c9b
author Brian Silverman <brians> Sun Nov 17 05:44:36 2013 -0800
committer Brian Silverman <brians> Sun Nov 17 21:54:12 2013 -0800
tree 1145c76a52a8c97b6dd2c0607b311ab045532e68
parent 6fd02995fddeb2368056f6570a5bce9404977957

started getting stuff to compile for ARM

There were lots of places where the ARM compiler is pickier about
alignment and the externals stuff had to be reworked to use the cross
compiler for everything.

The main issues left are the lack of opencv and the x86 asm.

aos/atom_code/configuration.cc

diff --git a/aos/atom_code/configuration.cc b/aos/atom_code/configuration.cc
index a5dd4ee..2d6dab8 100644
--- a/aos/atom_code/configuration.cc
+++ b/aos/atom_code/configuration.cc
@@ -35,7 +35,8 @@
     if (addrs->ifa_addr->sa_family == AF_INET) {
       if (strcmp(kAtomNetInterface, addrs->ifa_name) == 0) {
         static const in_addr r =
-            reinterpret_cast<sockaddr_in *>(addrs->ifa_addr)->sin_addr;
+            reinterpret_cast<sockaddr_in *>(__builtin_assume_aligned(
+                addrs->ifa_addr, alignof(sockaddr_in)))->sin_addr;
         return &r;
       }
     }

aos/atom_code/core/LogFileCommon.h

diff --git a/aos/atom_code/core/LogFileCommon.h b/aos/atom_code/core/LogFileCommon.h
index 3798b06..8c1bd7b 100644
--- a/aos/atom_code/core/LogFileCommon.h
+++ b/aos/atom_code/core/LogFileCommon.h
@@ -132,15 +132,18 @@
         sizeof(mutex) > kPageSize) {
       char *const temp = current_;
       MapNextPage();
-      if (futex_set_value(reinterpret_cast<mutex *>(&temp[position_]), 2) == -1) {
-        fprintf(stderr, "LogFileCommon: futex_set_value(%p, 2) failed with %d: %s."
-                " readers will hang\n", &temp[position_], errno, strerror(errno));
+      if (futex_set_value(static_cast<mutex *>(static_cast<void *>(
+                      &temp[position_])), 2) == -1) {
+        fprintf(stderr,
+                "LogFileCommon: futex_set_value(%p, 2) failed with %d: %s."
+                " readers will hang\n",
+                &temp[position_], errno, strerror(errno));
       }
       Unmap(temp);
       position_ = 0;
     }
-    LogFileMessageHeader *const r = reinterpret_cast<LogFileMessageHeader *>(
-        &current_[position_]);
+    LogFileMessageHeader *const r = static_cast<LogFileMessageHeader *>(
+        static_cast<void *>(&current_[position_]));
     position_ += message_size;
     // keep it aligned for next time
     position_ += kAlignment - (position_ % kAlignment);
@@ -150,7 +153,8 @@
   const LogFileMessageHeader *ReadNextMessage(bool wait) {
     LogFileMessageHeader *r;
     do {
-      r = reinterpret_cast<LogFileMessageHeader *>(&current_[position_]);
+      r = static_cast<LogFileMessageHeader *>(
+          static_cast<void *>(&current_[position_]));
       if (wait) {
         if (futex_wait(&r->marker) != 0) continue;
       }
@@ -158,7 +162,7 @@
         Unmap(current_);
         MapNextPage();
         position_ = 0;
-        r = reinterpret_cast<LogFileMessageHeader *>(current_);
+        r = static_cast<LogFileMessageHeader *>(static_cast<void *>(current_));
       }
     } while (wait && r->marker == 0);
     if (r->marker == 0) {

aos/atom_code/ipc_lib/queue.cc

diff --git a/aos/atom_code/ipc_lib/queue.cc b/aos/atom_code/ipc_lib/queue.cc
index 7ab7b6c..018f03a 100644
--- a/aos/atom_code/ipc_lib/queue.cc
+++ b/aos/atom_code/ipc_lib/queue.cc
@@ -39,9 +39,9 @@
   int ref_count;
   int index;  // in pool_
   static MessageHeader *Get(const void *msg) {
-    return reinterpret_cast<MessageHeader *>(
-        static_cast<uint8_t *>(const_cast<void *>(msg)) -
-        sizeof(MessageHeader));
+    return reinterpret_cast<MessageHeader *>(__builtin_assume_aligned(
+        static_cast<uint8_t *>(const_cast<void *>(msg)) - sizeof(MessageHeader),
+        alignof(MessageHeader)));
   }
   void Swap(MessageHeader *other) {
     MessageHeader temp;