Auto merge of #56642 - nikic:llvm-6, r=alexcrichton

Bump minimum required LLVM version to 6.0

Based on the discussion in #55842, while the overall position of Rust wrt LLVM continues to be contentious, there does seem to be a consensus that there is no need for continued support of LLVM 5. This PR bumps our version requirement to LLVM 6.0 and makes Travis run against that.

I hope that this is going to unblock #52694. If I understand correctly, while this issue still exists in LLVM 6, Ubuntu has backported the relevant patch.

r? @alexcrichton

1 files changed, 1 insertions, 6 deletions

diff --git a/src/rustllvm/ArchiveWrapper.cpp b/src/rustllvm/ArchiveWrapper.cpp
index 1355c0377ce..2f8dc0d466f 100644
--- a/src/rustllvm/ArchiveWrapper.cpp
+++ b/src/rustllvm/ArchiveWrapper.cpp
@@ -216,16 +216,11 @@ LLVMRustWriteArchive(char *Dst, size_t NumMembers,
       Members.push_back(std::move(*MOrErr));
     }
   }
+
   auto Result = writeArchive(Dst, Members, WriteSymbtab, Kind, true, false);
-#if LLVM_VERSION_GE(6, 0)
   if (!Result)
     return LLVMRustResult::Success;
   LLVMRustSetLastError(toString(std::move(Result)).c_str());
-#else
-  if (!Result.second)
-    return LLVMRustResult::Success;
-  LLVMRustSetLastError(Result.second.message().c_str());
-#endif
 
   return LLVMRustResult::Failure;
 }