Continuing to try and simplify the build system, calculate the remaining
two autoconf variables from the existing config.mak.
For the moment, leave a configure and configure.ac file in place to
allow any old build systems to continue to function without errors.
It is difficult to maintain one build system, let alone two - especially
if one build system is known to be better maintained and the other build
system continues to be used - with bug and feature requests raised
against it.
The maintainers are aware that there are people using the CMake system,
but believe that the extra maintainability of only having one build
system, combined with the knowledge that the current CI system
demonstrates that all supported architectures are working with the
Makefiles make the use of these Makefiles a more sustainable direction.
* Ensure all options start off for cmake too
* Attempt to make the build time config logic in the cmake process match the makefile process
* Add a simple muscle memory helper for cmake
* Ask them what they are smoking, then tell them to put it out
* Avoid occasional stale package cache errors
* Convert zstd feature to default disable
* All autoconf test use one standard template
To simplify the testing, cross-compilation and repeatable build process,
no configure options are automatically probed for - they all default to
off and are all using the same template.
The --with-x options should be deprecated and replaced with --enable-x
because there is no syntax checking for --with options in autoconf.
There are still some differences between the config options, but this
should provide a starting point.
* Remove unused code from the autoconf
* Remove warnings from default build
* Avoid calling port mapping functions if none are enabled
* Start with all builds in neutral config
* Add more missing code guards
* Adjust code guard location to placate cmake
