Redo variable naming for `silent' machinery. The public variables are named `AM_V_' plus the compiler short-hand now, e.g.: AM_V_CC, AM_V_CXXLD, AM_V_GEN. The dispatch variables are internal details and begin with `am__v_'. * automake.in (verbose_var): Update comment. (verbose_private_var): New function. Order functions so that ones not needed outside this section are listed first. (verbose_dispatch): Remove, no need to factor this. (define_verbose_var, define_verbose_libtool): Use verbose_private_var. (define_verbose_tagvar): Likewise; and simplify. Report by Jan Engelhardt. Signed-off-by: Ralf Wildenhues <Ralf.Wildenhues@gmx.de>