Hi! On Fri, Feb 03, 2023 at 12:49:12AM -0500, Michael Meissner wrote: > This patch updates the IEEE 128-bit types used in libgcc. > > At the moment, we cannot build GCC when the target uses IEEE 128-bit long > doubles, such as building the compiler for a native Fedora 36 system. The > build dies when it is trying to build the _mulkc3.c and _divkc3 modules. > > This patch changes libgcc to use long double for the IEEE 128-bit base type if > long double is IEEE 128-bit, and it uses _Float128 otherwise. The built-in > functions are adjusted to be the correct version based on the IEEE 128-bit > base > type used.
Please make it much clearer (in the code as well as in the commit message) that this is a workaround for problems elsewhere. It complicates already complicated things that should not be all that complex in the first place :-( It is not clear to me that this is good to have at all -- it causes new non-trivial problems after all -- but you say it allows people to at least bootstrap, in more cases than before. So with comments like I said above: okay for trunk. And not okay for any backports. Thanks, Segher
