clang build: bits/c++config.h not found

[Jan Danielsson <jan.m.danielsson%gmail.com@localhost>]

Hello,

   When I try building -current using clang[*], I get this:

In file included from
/usr/src/external/gpl3/gcc/dist/libstdc++-v3/src/c++98/allocator-inst.cc:29:
In file included from
/home/jan/sysbuild/dest.amd64/usr/include/c++/memory:598:
In file included from
/usr/src/external/gpl3/gcc/dist/libstdc++-v3/libsupc++/typeinfo:34:
/usr/src/external/gpl3/gcc/dist/libstdc++-v3/libsupc++/exception:37:10:
fatal error: 'bits/c++config.h' file not found
#include <bits/c++config.h>
         ^

   It's been happening for the past few days, but releng doesn't seem to
be having the issues?  Building using gcc works though.

   (I'm checking out src from the cvs repository).

   Are there some new:ish steps one needs to take to build clang on
-current?  I haven't updated this system for quite a while.


[*] export MKLLVM=yes
    export MKLIBCXX=yes
    export HAVE_LLVM=yes



-- 
Kind Regards,
Jan