Fix the default libc++ header search path to be sysrooted. Radar 9639692.
The -cxx-isystem path is not prefixed with the sysroot directory, so it's
not a good way for the driver to set the system default C++ search path.
Instead, add -stdlib as a cc1 option and teach the frontend how to find the
headers. The driver can then just pass -stdlib through to "cc1".
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@133547 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/include/clang/Driver/CC1Options.td b/include/clang/Driver/CC1Options.td
index 9d20832..653f346 100644
--- a/include/clang/Driver/CC1Options.td
+++ b/include/clang/Driver/CC1Options.td
@@ -461,6 +461,8 @@
HelpText<"Generate weak vtables and RTTI with hidden visibility">;
def std_EQ : Joined<"-std=">,
HelpText<"Language standard to compile for">;
+def stdlib_EQ : Joined<"-stdlib=">,
+ HelpText<"C++ standard library to use">;
def fmath_errno : Flag<"-fmath-errno">,
HelpText<"Require math functions to indicate errors by setting errno">;
def fms_extensions : Flag<"-fms-extensions">,