[llvm-ar] Extract objects to their basename in the CWD

This is helpful when extracting objects from archives produced by MSVC's
lib.exe, which users absolute paths to describe the archive members.

llvm-svn: 299264

1 files changed, 3 insertions, 1 deletions

diff --git a/llvm/tools/llvm-ar/llvm-ar.cpp b/llvm/tools/llvm-ar/llvm-ar.cpp
index 6d7c1c1c546..17e78a6bf96 100644
--- a/llvm/tools/llvm-ar/llvm-ar.cpp
+++ b/llvm/tools/llvm-ar/llvm-ar.cpp
@@ -377,7 +377,9 @@ static void doExtract(StringRef Name, const object::Archive::Child &C) {
   sys::fs::perms Mode = ModeOrErr.get();
 
   int FD;
-  failIfError(sys::fs::openFileForWrite(Name, FD, sys::fs::F_None, Mode), Name);
+  failIfError(sys::fs::openFileForWrite(sys::path::filename(Name), FD,
+                                        sys::fs::F_None, Mode),
+              Name);
 
   {
     raw_fd_ostream file(FD, false);