On Sun, May 6, 2012 at 10:33 AM, Janne Blomqvist <blomqvist.ja...@gmail.com> wrote: > Hi, > > in http://gcc.gnu.org/install/prerequisites.html we say that GCC > requires at least MPFR 2.4.2, but in the toplevel configure.ac we only > require 2.3.1, printing a warning that the result is likely to be > buggy if the version is lower than 2.4.2. > > The attached patch bumps the minimum version to 2.4.0. We started > requiring 2.3.1, which was released on 2008-01-29, on 2009-04-08, that > is, about 1 year and a few months after the release. MPFR 2.4.0 was > released on 2009-01-26, so by now it's 3 years old. And by the time we > release 4.8 it's most likely over 4 years old already. > > For some background, the fortran frontend recently started using > mpfr_fmod to fix some bugs in the constant folding of the MOD and > MODULO intrinsics, effectively requiring at least MPFR 2.4.0 in order > to build. > > Also, if this patch is accepted the middle-end could be modified to > constant fold BUILT_IN_FMOD{F,,L} relatively easily, something which > isn't done today. > > Ok for trunk?
Please make the check match documentation, thus 2.4.2, not 2.4.0. Thanks, Richard. > > 2012-05-06 Janne Blomqvist <j...@gcc.gnu.org> > > * configure.ac: Bump minimum MPFR version to 2.4.0. > * configure: Regenerated. > > > -- > Janne Blomqvist
