gcc: add llvm-gcc and llvm from trunk (does not successfully compile a target yet, but gets close)

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@18019 3c298f89-4303-0410-b956-a3cf2f4a3e73

toolchain/gcc/patches/llvm/304-index_macro.patch

@@ -0,0 +1,24 @@
+--- a/libstdc++-v3/include/ext/rope
++++ b/libstdc++-v3/include/ext/rope
+@@ -58,6 +58,9 @@
+ #include <bits/allocator.h>
+ #include <ext/hash_fun.h>
+ 
++/* cope w/ index defined as macro, SuSv3 proposal */
++#undef index
++
+ # ifdef __GC
+ #   define __GC_CONST const
+ # else
+--- a/libstdc++-v3/include/ext/ropeimpl.h
++++ b/libstdc++-v3/include/ext/ropeimpl.h
+@@ -54,6 +54,9 @@
+ #include <ext/memory> // For uninitialized_copy_n
+ #include <ext/numeric> // For power
+ 
++/* cope w/ index defined as macro, SuSv3 proposal */
++#undef index
++
+ _GLIBCXX_BEGIN_NAMESPACE(__gnu_cxx)
+ 
+   using std::size_t;