build: fix for broken MSVC and Open Watcom makefiles

[jmalak]

fix recursive call to make for MSVC and Open Watcom

do make files more consistent

• add NULLCMD macro
• add WARNFILESX macro as template for extensions substitution
• use EMPTY macro everywhere
• use RM_F and RM_RF everywhere for deletion

[hpax]

As of 3.00rc19, the code seems to work, but I will look at this for 3.01 to see if it can be done better.

[Yongjie2017]

Team was busy on getting 3.00 release ready. And the msvc building system got a huge improvement.
Please rebase the code and see whether broken one is fixed already or not! If not, could you please re-do the patch based on the latest code base?

[hpax]

Hi, this seems to fail the tests you have added :)

Also, I don't know much about github CI/CD, but if you could please check to see if conflicts with the one added on the nasm-3.00.xx branch (which is the correct branch for this.)

If wmake needs %make, then $(MAKE) should be set appropriately, instead of making it a wmake-specific rule.

As many of the rules should be put into the generated sections (#-- --#) so that they are explicitly kept in sync. Since it looks like you are re-introducing the warnings rules for the auxiliary Makefiles it does have potential issues.

I also wonder if it would be better to make OpenWatcom work with GNU make/owcc (owcc was broken last time I tried it) and ideally configure instead of WMAKE. Alternatively, config/watcom.h almost certainly needs updating...

[hpax]

FYI - I'm going to be disaggregating the warnings from the source code. It "seemed like a good idea" but has turned out to be a nightmare from a dependency point of view.

[jmalak]

No problem, I can do it for you if you have a new version then send me note and I will check and fix if needed.
I finished build testing for MS Visual Studio 2022 and Open Watcom 1.9/2.0 and Linux/Windows host build.
I will create two new PRs and close this one, because most of issues are already fixed, but there are a few new issues.
One for code changes and second one for make files.

[jmalak]

It is replaced by
open-watcom: Open Watcom fix switch handling for 64-bit argument
and
open-watcom: fix Open Watcom build make file