* toplev.c (flag_rounding_math): New global variable.
(f_options): Add to the list of language independent options.
* flags.h (flag_rounding_math): Prototype here.
(HONOR_SIGN_DEPENDENT_ROUNDING): Use flag_rounding_math instead.
* common.opt (frounding-math): New common command line option.
* opts.c (common_handle_option): Handle OPT_frounding_math.
(set_fast_math_flags): -ffast-math clears flag_rounding_math.
* doc/invoke.texi: Document this new command line option.
From-SVN: r71032
