On Tue, 26 Apr 2016, Bernd Edlinger wrote: > Hi, > > as we all know, it's high time now to adjust the minimum supported > gmp/mpfr/mpc versions for gcc-7.
I think updating the minimum versions (when using previously built libraries, not in-tree) is only appropriate when it allows some cleanup in GCC, such as removing conditionals on whether a more recently added function is available, adding functionality that depends on a newer interface, or using newer interfaces instead of older ones that are now deprecated. For example, you could justify a move to requiring MPFR 3.0.0 or later with cleanups to use MPFR_RND* instead of the older GMP_RND*, and similarly mpfr_rnd_t instead of the older mp_rnd_t and likewise mpfr_exp_t and mpfr_prec_t in fortran/. You could justify a move to requiring MPC 1.0.0 (or 1.0.2) by optimizing clog10 using mpc_log10. I don't know what if any newer GMP interfaces would be beneficial in GCC. And as always in such cases, it's a good idea to look at e.g. how widespread the newer versions are in GNU/Linux distributions, which indicates how many people might be affected by an increase in the version requirement. -- Joseph S. Myers jos...@codesourcery.com
