[PATCH] libc++abi: Make the .eh_frame_hdr code work on FreeBSD and CloudABI as well

[Saleem Abdulrasool]

REPOSITORY
  rL LLVM

================
Comment at: src/Unwind/AddressSpace.hpp:60
@@ -59,3 +59,3 @@
 
-#if defined(__linux__)
+#if defined(__CloudABI__) || defined(__FreeBSD__) || defined(__linux__)
 #if _LIBUNWIND_SUPPORT_DWARF_UNWIND && _LIBUNWIND_SUPPORT_DWARF_INDEX
----------------
This part is safe.

================
Comment at: src/Unwind/AddressSpace.hpp:71
@@ -63,1 +70,3 @@
+#define ElfW3(width, type) Elf##width##_##type
+#endif
 #include "EHHeaderParser.hpp"
----------------
Hmm..Im not sure that this is the best way to approach this.  What if you want to do remote unwinding, where your host is 32-bit and your remote is 64-bit or vice-versa.  This breaks in that case, as you are using `__INTPTR_WIDTH__`.  Or am I overlooking something?

http://reviews.llvm.org/D8169

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