[gcc(refs/users/meissner/heads/work177-libs)] Do not build IEEE 128-bit libstdc++ support if VSX is not available.

https://gcc.gnu.org/g:3696abc890a0e9acbd4e93c688d0e238c011ee76 commit 3696abc890a0e9acbd4e93c688d0e238c011ee76 Author: Michael Meissner Date: Wed Sep 4 11:31:56 2024 -0400 Do not build IEEE 128-bit libstdc++ support if VSX is not available. If you build a little endian compiler an

[gcc(refs/users/meissner/heads/work177-libs)] Do not build IEEE 128-bit libstdc++ support if VSX is not available.

https://gcc.gnu.org/g:61b479aadbe46f39409f8f3996e3192adf60b66d commit 61b479aadbe46f39409f8f3996e3192adf60b66d Author: Michael Meissner Date: Wed Sep 4 11:30:57 2024 -0400 Do not build IEEE 128-bit libstdc++ support if VSX is not available. If you build a little endian compiler an