On Mon, Dec 19, 2022 at 8:59 AM <soeren@soeren-tempel.net> wrote:
>
> From: Sören Tempel <soeren@soeren-tempel.net>
>
> This patch is similar to the existing check for librt. If libucontext
> is installed and libucontext.a provides the aforementioned symbols, then
> it is added to $LIBS. If not, no error is emitted. We could,
> alternatively, also check libc.a for these symbols and thus prefer libc
> over libucontext if both are installed and provide the symbols. If
> deemed desirable, this could be achieved by changing the invocation
> to AC_SEARCH_LIBS([makecontext], [c ucontext]).
>
> This version of this patch has been tested on x86_64 Alpine Linux Edge
> (libucontext 1.2 + musl 1.2.3) and Arch Linux (glibc 2.36). On the
> latter, the check is a no-op and $LIBS is not modified.

Thanks.  I don't see a reason to check for all the functions.
Committed like so after testing on x86_64-pc-linux-gnu with glibc.

Ian