def install__name : Separate<"-install_name">;
def iprefix : JoinedOrSeparate<"-iprefix">, Group<clang_i_Group>;
def iquote : JoinedOrSeparate<"-iquote">, Group<clang_i_Group>;
-def isysroot : JoinedOrSeparate<"-isysroot">, Group<i_Group>;
+def isysroot : JoinedOrSeparate<"-isysroot">, Group<clang_i_Group>;
def isystem : JoinedOrSeparate<"-isystem">, Group<clang_i_Group>;
def iwithprefixbefore : JoinedOrSeparate<"-iwithprefixbefore">, Group<clang_i_Group>;
def iwithprefix : JoinedOrSeparate<"-iwithprefix">, Group<clang_i_Group>;