Cross compilation

[Jonathan Wakely]

On 16 February 2018 at 12:27, Ilya Lyubimov wrote:
> I encountered the same error when trying to cross compile GCC 7.3.0 for
> FreeBSD. The autoconf check for aligned_alloc function doesn't exist
> for FreeBSD target in libstdc++-v3/crossconfig.m4. When I added this
> check I could successfully compile GCC targeting FreeBSD 9.3. See my
> patch below.
>
> --- a/libstdc++-v3/crossconfig.m4       2018-02-12 19:54:24.323673272
> +0300
> +++ b/libstdc++-v3/crossconfig.m4       2018-02-12 19:53:33.826632457
> +0300
> @@ -133,6 +133,7 @@
>        AC_DEFINE(HAVE_ISNANL)
>      fi
>      AC_CHECK_FUNCS(__cxa_thread_atexit)
> +    AC_CHECK_FUNCS(aligned_alloc posix_memalign memalign
> _aligned_malloc)
>      ;;
>
>    *-fuchsia*)

Aha! That explains it, thanks for the patch.