From: Natanael Copa <ncopa@alpinelinux.org>
Date: Thu, 18 Feb 2016 10:33:04 +0100
Subject: [PATCH] Fix build with musl libc

On musl libc the fopen64 and fopen are the same thing, but for
compatibility they have a `#define fopen64 fopen`. Same applies for
fseek64, fstat64, fstatvfs64, ftello64, lstat64, stat64 and tmpfile64.

--- a/include/llvm/Analysis/TargetLibraryInfo.h
+++ b/include/llvm/Analysis/TargetLibraryInfo.h
@@ -18,6 +18,15 @@
 #include "llvm/IR/Module.h"
 #include "llvm/Pass.h"
 
+#undef fopen64
+#undef fseeko64
+#undef fstat64
+#undef fstatvfs64
+#undef ftello64
+#undef lstat64
+#undef stat64
+#undef tmpfile64
+
 namespace llvm {
 /// VecDesc - Describes a possible vectorization of a function.
 /// Function 'VectorFnName' is equivalent to 'ScalarFnName' vectorized