http://gcc.gnu.org/bugzilla/show_bug.cgi?id=55591
--- Comment #5 from Joost VandeVondele <Joost.VandeVondele at mat dot ethz.ch> 2013-03-29 06:13:38 UTC --- (In reply to comment #3) > Untested (but successfully compiled) patch: > > --- a/gcc/fortran/options.c > +++ b/gcc/fortran/options.c > @@ -170,4 +170,6 @@ gfc_init_options (unsigned int decoded_options_count, > set_default_std_flags (); > > + flag_strict_aliasing = -1; > + > /* Initialize cpp-related options. */ > gfc_cpp_init_options (decoded_options_count, decoded_options); > @@ -275,4 +277,8 @@ gfc_post_options (const char **pfilename) > gfc_option.flag_whole_file = 1; > > + /* By default use strict-aliasing semantics. */ > + if (flag_strict_aliasing == -1) > + flag_strict_aliasing = 1; > + > /* Fortran allows associative math - but we cannot reassociate if > we want traps or signed zeros. Cf. also flag_protect_parens. */ what about applying this to stage 1 4.9 ?
