Flex for Windows

Flex: fast lexical analyzer generator




Flex is a fast lexical analyser generator. It is a tool for generating programs that perform pattern-matching on text. There are many applications for Flex, including writing compilers in conjunction with GNU Bison. Flex is a free implementation of the well known Lex program. It features a Lex compatibility mode, and also provides several new features such as exclusive start conditions.




If you download the Setup program of the package, the dependencies, as listed below under Requirements, are already included, apart from msvcrt.dll. If you download the package as Zip files, then you must download and install the dependencies zip file.

DescriptionDownloadSizeLast change
• Complete package, except sources Setup  1226215 7 April 2004
• Binaries Zip  202802 7 April 2004
• Developer files Zip  3792 7 April 2004
• Documentation Zip  974611 7 April 2004
• Sources Zip  464663 7 April 2004

You can also download the files from the GnuWin32 files page.

Installation and Usage

General Installation Instructions


All required packages from GnuWin32, i.e. excluding msvcrt.dll, perl, etc, are included in the Setup program and the dependencies zip file.

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