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From: "egallager at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug modula2/111956] Many powerpc platforms do _not_ have support
 for IEEE754 long double
Date: Wed, 01 Nov 2023 13:52:08 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D111956

--- Comment #3 from Eric Gallager <egallager at gcc dot gnu.org> ---
(In reply to Thomas Schwinge from comment #2)
> While you (Gaius) here report test failure, similar to what Maciej had
> reported in PR112091 "rs6000: redefinition of 'constexpr long double
> std::abs(long double)', while building libgm2", I can't even build libgm2
> anymore.
>=20
> Similar had reported Eric (CCed here) on GCC IRC, 2023-10-20:
>=20
>     <ericgallager> ok now this is an error I haven't seen before
>     <ericgallager>
> /home/egallager/gcc/.cfarm135_build.build/powerpc64le-unknown-linux-gnu/
> libstdc++-v3/include/bits/std_abs.h:137:3: error: redefinition of 'conste=
xpr
> long double std::abs(long double)'
>     <ericgallager> seen on cfarm135
>     <ericgallager> I think I remember something about __float128 being we=
ird
> on certain powerpc systems? Is there a configure flag that affects it?
>     <ericgallager> I'll open a bug about it...
>     <ericgallager> although actually wait... I'm not quite sure the
> component, though... it's an error from a libstdc++ header, but it shows =
up
> while building KeyBoardLEDs.lo for libm2cor in libgm2, but only for a
> specific target...

Ah, thanks for the cc! I'd meant to look further into this, but got distrac=
ted
by other things...=