Moving to c++20

[Robert]

MAME just made the move to c++20. At this stage I have not tried compiling to find out what has been broken, if anything.

The only supported windows versions are now 10 and 11. The minimum GCC version is now 11 instead of 10.3 .

More info as it becomes available...

 

[Robert]

Finished compiling everything. There was a small issue in MAMEUI, easily fixed. Everything else is fine.

Tried the new MAME on Windows 7, it does not run due to a missing entry point. So, ver 0.287 is the last one for Windows 7/8/8.1 .

 

[Midnight Kid]

It's sad, but it gone to that. ☹️

[Robert]

Someone asked if it was possible to make it work on Windows 7 again, so I made 3 changes and then the current git worked. How long it stays working is another matter.

 

[StHiryu]

Woul like to know what are the fixes to compile correctly the new mameui under win 7, since I have to compile it by myself every release after the nasty changes about save state system

[Robert]

What's wrong with save states? (I didn't know anything had changed.)

 

Now, with win7 breakage, the change in question is https://github.com/mamedev/mame/commit/eea4b4719063219fb4572ef1f346422304c10e68

Some parts need reverting. I only temporarily tested with current official MAME.

At the bottom of the file list are 3 files in src\osd\windows - you need to revert all the changes in these files. After that, mame should work again in windows 7. You should be able to do the same in my builds although I didn't test it.

Also, since the next release isn't until end of May, there's plenty of chance for more breakage coming from the devs.

[StHiryu]

Thanks Robbert, regarding save states, they've been modified so that when you press the save or load state key, you can't use any other control key simultaneously.

Supposedly, this is to prevent you from using the key assigned to magic or special bombs while playing and wasting it—which is absolutely ridiculous and makes saving difficult in games where you have to hold down a button, like racing games.

[Robert]

I didn't know about that. Since you know how to fix it, can you show me how and I'll see if the fix can be incorporated into my builds.