Hello.

How can I add additional source files for a program on fly? For instance, in
usual Makefile I can do:

SOURCES = file1.ml file2.ml file3.ml
SOURCES += $(USER_SELECTED_PLUBINS)
SOURCES += file4.ml

All files including a list of user selected files are described in _tags, so
there remains the small stuff -- how to somewhat interesting in myocamlbuild.ml.
As always, there is important the order of files.
And I hope that it does not need to describe long rules to produce %.cm(o|x)s...

Thanks.
ermine