[Bug bootstrap/46810] [4.6 regression] sparc64-linux bootstrap fails with "C++ preprocessor "/lib/cpp" fails sanity check"

[jakub at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=46810

--- Comment #2 from Jakub Jelinek <jakub at gcc dot gnu.org> 2010-12-06 11:37:29 UTC ---
Created attachment 22652
  --> http://gcc.gnu.org/bugzilla/attachment.cgi?id=22652
gcc46-pr46810.patch

Wouldn't something like this fix this?  If neither --enable-build-with-cxx is
given, nor --enable-languages contains go, then we shouldn't require C++
compiler and in that case AC_LANG_PUSH(C++) is wrong.