Object, support both mach-o archive t.o.c file names

For historical reasons archives on mach-o have two possible names for the 
file containing the table of contents for the archive: "__.SYMDEF SORTED" 
and "__.SYMDEF".  But the libObject archive reader only supported the former.

This patch fixes llvm::object::Archive to support both names.

llvm-svn: 221747

3 files changed, 2 insertions, 1 deletions

diff --git a/llvm/lib/Object/Archive.cpp b/llvm/lib/Object/Archive.cpp
index 070fe812eec..d169dbee46e 100644
--- a/llvm/lib/Object/Archive.cpp
+++ b/llvm/lib/Object/Archive.cpp
@@ -240,7 +240,7 @@ Archive::Archive(MemoryBufferRef Source, std::error_code &ec)
     if (ec)
       return;
     Name = NameOrErr.get();
-    if (Name == "__.SYMDEF SORTED") {
+    if (Name == "__.SYMDEF SORTED" || Name == "__.SYMDEF") {
       SymbolTable = i;
       ++i;
     }
diff --git a/llvm/test/Object/Inputs/macho-archive-unsorted-x86_64.a b/llvm/test/Object/Inputs/macho-archive-unsorted-x86_64.a
new file mode 100644
index 00000000000..6a2b570f160
--- /dev/null
+++ b/llvm/test/Object/Inputs/macho-archive-unsorted-x86_64.a
diff --git a/llvm/test/Object/archive-symtab.test b/llvm/test/Object/archive-symtab.test
index 0899828bdfb..01f17bcc8b6 100644
--- a/llvm/test/Object/archive-symtab.test
+++ b/llvm/test/Object/archive-symtab.test
@@ -61,6 +61,7 @@ RUN: llvm-ranlib %t.a
 RUN: llvm-nm -M %t.a | FileCheck %s
 
 RUN: llvm-nm -M %p/Inputs/macho-archive-x86_64.a | FileCheck %s --check-prefix=BSD-MachO
+RUN: llvm-nm -M %p/Inputs/macho-archive-unsorted-x86_64.a | FileCheck %s --check-prefix=BSD-MachO
 
 BSD-MachO: Archive map
 BSD-MachO: _bar in bar.o