configure: improve error for ucontext coroutine backend
commit7cb5844808f092306a5a764fe8427a653ac05358
authorPaolo Bonzini <pbonzini@redhat.com>
Fri, 19 Aug 2022 16:40:46 +0000 (19 18:40 +0200)
committerPaolo Bonzini <pbonzini@redhat.com>
Thu, 1 Sep 2022 05:42:37 +0000 (1 07:42 +0200)
tree36f3a88b59be56e7d953b261080fa2990dbeca12
parent45ed68a1a3a19754ade954d75a3c9d13ff560e5c
configure: improve error for ucontext coroutine backend

Instead of using feature_not_found(), which is not a good match because
there is no "remedy" to fix the lack of makecontext(), just print a
custom error.

This happens to remove the last use of feature_not_found(), so remove
the definition and the documentation.

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
configure
docs/devel/build-system.rst