Driver & AST: Implement support for -fpack-struct and -fpack-struct= command
line options.
 - <rdar://problem/10120602>, PR9631

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@141211 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/include/clang/Driver/CC1Options.td b/include/clang/Driver/CC1Options.td
index 00fc815..ffe1eaf 100644
--- a/include/clang/Driver/CC1Options.td
+++ b/include/clang/Driver/CC1Options.td
@@ -541,6 +541,8 @@
   HelpText<"Value for __PIC__">;
 def pthread : Flag<"-pthread">,
   HelpText<"Support POSIX threads in generated code">;
+def fpack_struct : Separate<"-fpack-struct">,
+  HelpText<"Specify the default maximum struct packing alignment">;
 def fpascal_strings : Flag<"-fpascal-strings">,
   HelpText<"Recognize and construct Pascal-style string literals">;
 def fno_rtti : Flag<"-fno-rtti">,