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From: "segher at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug bootstrap/97163] Build error with -mcpu=power9 on ppc64
Date: Tue, 22 Sep 2020 16:48:05 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D97163

--- Comment #3 from Segher Boessenkool <segher at gcc dot gnu.org> ---
(In reply to Jakub Jelinek from comment #2)
> Guess we need something like:
> -#elif defined(_ARCH_PWR8) && defined(__ALTIVEC__)
> +#elif (GCC_VERSION >=3D 4005) && defined(_ARCH_PWR8) && defined(__ALTIVE=
C__)
> in libcpp/lex.c if clang doesn't support the altivec attribute and the
> builtins.

But it should!  What is actually going wrong here?  The compiler should
not declare it supports what is tested for by __ALTIVEC__ if it doesn't.=