On Fri, 2019-05-24 at 11:59 -0500, Qing Zhao wrote: > Hi, > > in order to fix PR90581: (provide an option to adjust the maximum > depth of nested #include) > > https://gcc.gnu.org/bugzilla/show_bug.cgi?id=90581 <https://gcc.gnu.o > rg/bugzilla/show_bug.cgi?id=90581> > > we need to add a new option to preprocessor. where should I put this > option? > > I tried to add a new option into: > > gcc/c-family/c.opt > > [qinzhao@localhost c-family]$ git diff c.opt > diff --git a/gcc/c-family/c.opt b/gcc/c-family/c.opt > index 046d489..4f237b6 100644 > --- a/gcc/c-family/c.opt > +++ b/gcc/c-family/c.opt > @@ -1598,6 +1598,10 @@ flocal-ivars > ObjC ObjC++ Var(flag_local_ivars) Init(1) > Allow access to instance variables as if they were local > declarations within instance method implementati > > +finclude-nest-limit= > +C ObjC C++ ObjC++ Joined RejectNegative UInteger > Var(include_nest_limit) Init(200) > +Set the maximum number of depth of nested #include. > + > > However, don’t know how to refer this new variable > “include_nest_limit” from libcpp. >
You probably want to add a new field to cpp_options, and copy over the value from the GCC options to the new field; see e.g. c_common_handle_option where various cases write to fields of cpp_opts. Hope this is helpful Dave
