Change Details

``` We noticed that we could build QT without using XLib/libX11 as a library. XLib/libX11's headers are still used, and a minimal configure.ac has been added to eliminate overly-enthusiastic configure-time dependencies that aren't actually required to obtain the headers. This also means that we eliminate XLib/libX11 as required shared libraries at runtime, which is desirable. ``` Backport of core PR16408. Depends on D5632.

``` We noticed that we could build QT without using XLib/libX11 as a library. XLib/libX11's headers are still used, and a minimal configure.ac has been added to eliminate overly-enthusiastic configure-time dependencies that aren't actually required to obtain the headers. This also means that we eliminate XLib/libX11 as required shared libraries at runtime, which is desirable. ``` Backport of core [[https://github.com/bitcoin/bitcoin/pull/16408 | PR16408]]. Depends on D5632.

``` We noticed that we could build QT without using XLib/libX11 as a library. XLib/libX11's headers are still used, and a minimal configure.ac has been added to eliminate overly-enthusiastic configure-time dependencies that aren't actually required to obtain the headers. This also means that we eliminate XLib/libX11 as required shared libraries at runtime, which is desirable. ``` Backport of core [[https://github.com/bitcoin/bitcoin/pull/16408 | PR16408]]. Depends on D5632.