win32/Makefiles: don't try to be clever with modification times

[tonycoz]

When I re-worked this I tried to reduce the amount of rebuilding needed in some cases, but this has caused other problems, so simplify.

Fixes #21680

[sisyphus]

Fixes #21680

Yes - fixes it for me, too.

[khwilliamson]

I probably won't have a chance to check this out, but if it works for @sisyphus , it sounds good to me

[khwilliamson]

Actually, I did test this, and found one issue, at least. It appears that some dependencies aren't getting found. If I touch perl.h, it rebuilds many objects, as you would expect. But I happened to just change locale_table.h, and no C files at all were recompiled. I wonder what other hdrs are somehow not having their dependencies properly built

[tonycoz]

Actually, I did test this, and found one issue, at least. It appears that some dependencies aren't getting found. If I touch perl.h, it rebuilds many objects, as you would expect. But I happened to just change locale_table.h, and no C files at all were recompiled. I wonder what other hdrs are somehow not having their dependencies properly built

There's no dependency scan (make depend) on Windows, the dependencies on header files is done by making all objects depend on all headers:

# We can't have miniperl.exe depend on git_version.h, as miniperl creates it
$(MINI_OBJ)	: $(MINIDIR)\.exists $(CORE_NOCFG_H)

$(WIN32_OBJ)	: $(CORE_H)

$(CORE_OBJ)	: $(CORE_H)

$(DLL_OBJ)	: $(CORE_H)

and CORE_NOCFG_H (used in the CORE_H definition) doesn't include locale_table.h.