https://gcc.gnu.org/bugzilla/show_bug.cgi?id=63509
--- Comment #8 from Jim Wilson <wilson at gcc dot gnu.org> ---
I filed an autoconf bug
http://savannah.gnu.org/support/index.php?109676
The problem here is that autoconf only verifies that the first AC_PROG_X
compiler is working. And since we include AC_PROG_CC before AC_PROG_CXX, only
the C compiler is tested to see if it works. But since we are using the C++
compiler for all of the configure checks, and for the build, we really should
be verifying that the C++ compiler works.
We can work around the autoconf problem by putting AC_PROG_CXX before
AC_PROG_CC. This will verify that the C++ compiler works, but will stop
verifying that the C compiler works, which is probably OK.
