Ben Gamari authored Oct 02, 2021 and Marge Bot committed Oct 03, 2021

Modern clang versions are quite picky when it comes to reporting
redundant arguments. In particular, they will warn when -no-pie is
passed when no linking is necessary.

Previously the configure script used a `$CC -Werror -no-pie -E`
invocation to test whether `-no-pie` is necessary. Unfortunately, this
meant that clang would throw a redundant argument warning, causing
configure to conclude that `-no-pie` was not supported. We now rather
use `$CC -Werror -no-pie`, ensuring that linking is necessary and
avoiding this failure mode.

Fixes #20463.