Blassic 0.10.0

Blassic is a classic Basic interpreter. The line numbers are mandatory, and it has PEEK & POKE. The main goal is to execute programs written in old interpreters, even those that use peculiar control flow constructs or automodifiable code.
However, it can be used as a scripting language, and has some not-so-classic instructions. It has graphics modes that are compatible with some classic systems and user defined.
Enhancements:
- There are problems using some versions of gcc on some platforms. In case Blassic core dumps on exiting or when a program has an error, compile it using -O0
- The regular expression functions are not supported under windows.
- The bidirectional POPEN may or may not work on windows depending on the windows version used.
- Now configure admits several options: --disable-graphics to compile without graphics support and --disable-curses to compile without curses nor ncurses. In the last case, CLS, LOCATE and other instructions when used in text mode are silently ignored. In the
- former, trying to enter in graphics mode generates an error. If curses is enabled, first ncurses is tested, if not available curses is used instead. The --disable-ncurses option skips the ncurses test and uses always curses.
- When configuring for unix/linux, using --without-x has the same effect as --disable-graphics. For windows is ignored.
- Several scripts to call configure are provided, see the do_conf* files.