Add support for the 's' operation to llvm-ar.

If no other operation is specified, 's' becomes an operation instead of an
modifier. The s operation just creates a symbol table. It is the same as
running ranlib.

We assume the archive was created by a sane ar (like llvm-ar or gnu ar) and
if the symbol table is present, then it is current. We use that to optimize
the most common case: a broken build system that thinks it has to run ranlib.

llvm-svn: 187353

1 files changed, 2 insertions, 0 deletions

diff --git a/llvm/include/llvm/Object/Archive.h b/llvm/include/llvm/Object/Archive.h
index c0513a7c20f..1cba51954ec 100644
--- a/llvm/include/llvm/Object/Archive.h
+++ b/llvm/include/llvm/Object/Archive.h
@@ -188,6 +188,8 @@ public:
   // check if a symbol is in the archive
   child_iterator findSym(StringRef name) const;
 
+  bool hasSymbolTable() const;
+
 private:
   child_iterator SymbolTable;
   child_iterator StringTable;