On Thu, 21 Nov 2013 19:11:28 +0100, Anton Khirnov <[email protected]> wrote: > > On Wed, 20 Nov 2013 20:23:58 +0100, Anton Khirnov <[email protected]> wrote: > > > > On Tue, 19 Nov 2013 13:20:22 -0800, Martynas Venckus <[email protected]> > > wrote: > > > Thanks, Anton. > > > > > > You can't do explicit casts as the standard mandates that those macros be > > > constant expressions. > > > > Using a cast does not prevent it from being a constant expression. In fact > > the > > relevant chapter in the C99 standard (6.6) explicitly mentions casts in this > > context as permitted. > > > > > > > > Moreover, GCC itself exports those exact same values via __DBL_MAX > > > builtins, which are not double-precision anymore when used. Please be > > > sure > > > to report this to GCC. > > > > > > > The value provided by newer gcc versions is explicitly cast to double. > > $ gcc-4.4 -dM -E - < /dev/null|grep __DBL_MAX__ > > #define __DBL_MAX__ 1.7976931348623157e+308 > > $ gcc-4.8 -dM -E - < /dev/null|grep __DBL_MAX__ > > #define __DBL_MAX__ ((double)1.79769313486231570815e+308L) > > > > So the problem only occurs because the value declared in your header is not > > treated as double. > > > > For the record, I've also discovered the same problem in the musl libc, and > they fixed it in commit 46db37289f917e23877a0e0df88cbb150805bc97 > http://git.musl-libc.org/cgit/musl/commit/?id=46db37289f917e23877a0e0df88cbb150805bc97
Ping. Got any news on this? -- Anton Khirnov _______________________________________________ libav-devel mailing list [email protected] https://lists.libav.org/mailman/listinfo/libav-devel
