Use __builtin___clear_cache on ARM to fix a clang bug.

Thanks to Matthias Klose.

debian/changelog

@@ -16,6 +16,8 @@ llvm-toolchain-3.2 (3.2-1~exp1) experimental; urgency=low
   * Enable RTTI (Closes: #697754)
   * Introduce lldb as a new package (Closes: #698601)
   * Add a script pollycc which will call clang with the right arguments.
+  * Use __builtin___clear_cache on ARM to fix a clang bug.
+    Thanks to Matthias Klose.
 
  -- Sylvestre Ledru <sylvestre@debian.org>  Mon, 07 Jan 2013 15:45:54 +0100
 

debian/patches/declare_clear_cache.diff

@@ -0,0 +1,13 @@
+Index: b/lib/Support/Unix/Memory.inc
+===================================================================
+--- a/lib/Support/Unix/Memory.inc
++++ b/lib/Support/Unix/Memory.inc
+@@ -318,7 +318,7 @@
+   // FIXME: Can we safely always call this for __GNUC__ everywhere?
+   const char *Start = static_cast<const char *>(Addr);
+   const char *End = Start + Len;
+-  __clear_cache(const_cast<char *>(Start), const_cast<char *>(End));
++  __builtin___clear_cache(const_cast<char *>(Start), const_cast<char *>(End));
+ #  elif defined(__mips__)
+   const char *Start = static_cast<const char *>(Addr);
+   cacheflush(const_cast<char *>(Start), Len, BCACHE);

debian/patches/series

@@ -27,3 +27,4 @@ scan-build-clang-path.diff
 57-lldb-soname.diff
 0050-powerpcspe-fp.diff
 polly-c++0x.diff
+declare_clear_cache.diff