GNU Bison

GNU Bison is an open source parser generator designed to convert a grammar description into a C program, so it can parse that grammar.

GNU Bison is upward compatible with Yacc. To use this program you must know C programming very well.

What is new in this release:

• Bug fixes:
• Errors in caret diagnostics:
• On some platforms, some errors could result in endless diagnostics.
• Fixes of the -Werror option:
• Options such as "-Werror -Wno-error=foo" were still turning "foo" diagnostics into errors instead of warnings. This is fixed. Actually, for consistency with GCC, "-Wno-error=foo -Werror" now also leaves "foo" diagnostics as warnings. Similarly, with "-Werror=foo -Wno-error", "foo" diagnostics are now errors.
• GLR Predicates:
• As demonstrated in the documentation, one can now leave spaces between "%?" and its "{".
• Installation:
• The yacc.1 man page is no longer installed if --disable-yacc was specified.
• Fixes in the test suite:
• Bugs and portability issues.