Identify thin archives as archives.

llvm-svn: 242921

lib/Support/Path.cpp

@@ -939,7 +939,8 @@ file_magic identify_magic(StringRef Magic) {
       break;
     case '!':
       if (Magic.size() >= 8)
-        if (memcmp(Magic.data(),"!<arch>\n",8) == 0)
+        if (memcmp(Magic.data(), "!<arch>\n", 8) == 0 ||
+            memcmp(Magic.data(), "!<thin>\n", 8) == 0)
           return file_magic::archive;
       break;
 

test/Object/nm-archive.test

@@ -58,3 +58,12 @@ GNU AR is able to parse the unaligned member and warns about the member with
 the unknown format. We should probably simply warn on both. For now just check
 that we don't produce an error.
 RUN: llvm-nm %p/Inputs/corrupt-archive.a
+
+
+RUN: llvm-nm %p/Inputs/thin.a | FileCheck %s -check-prefix THIN
+
+THIN: IsNAN.o:
+THIN: 00000014 T _ZN4llvm5IsNANEd
+THIN: 00000000 T _ZN4llvm5IsNANEf
+THIN:          U __isnan
+THIN:          U __isnanf