[v3] Fix / clean-up config vs crosses (5/n): avoid a TRY_RUN

[Mark Mitchell]

Paolo Carlini wrote:

Isn't this:

!   AC_MSG_CHECKING([for "/dev/random" and "/dev/urandom" for TR1
random_device])
    AC_CACHE_VAL(glibcxx_cv_random_tr1, [
!     if test -r /dev/random && test -r /dev/urandom; then
!       glibcxx_cv_random_tr1=yes;
!     else
!       glibcxx_cv_random_tr1=no;
!     fi

checking a property of the build machine, unrelated to the target machine?

-- 
Mark Mitchell
CodeSourcery
mark@codesourcery.com
(650) 331-3385 x713