59 lines
2.5 KiB
Scheme
59 lines
2.5 KiB
Scheme
;;; Guix --- Nix package management from Guile. -*- coding: utf-8 -*-
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;;; Copyright (C) 2012 Ludovic Courtès <ludo@gnu.org>
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;;;
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;;; This file is part of Guix.
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;;;
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;;; Guix is free software; you can redistribute it and/or modify it
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;;; under the terms of the GNU General Public License as published by
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;;; the Free Software Foundation; either version 3 of the License, or (at
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;;; your option) any later version.
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;;;
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;;; Guix is distributed in the hope that it will be useful, but
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;;; WITHOUT ANY WARRANTY; without even the implied warranty of
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;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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;;; GNU General Public License for more details.
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;;;
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;;; You should have received a copy of the GNU General Public License
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;;; along with Guix. If not, see <http://www.gnu.org/licenses/>.
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(define-module (distro packages flex)
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#:use-module (guix packages)
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#:use-module (guix download)
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#:use-module (guix build-system gnu)
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#:use-module (distro)
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#:use-module (distro packages m4)
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#:use-module (distro packages bison))
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(define-public flex
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(package
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(name "flex")
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(version "2.5.37")
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(source (origin
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(method url-fetch)
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(uri (string-append "mirror://sourceforge/flex/flex-"
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version ".tar.bz2"))
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(sha256
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(base32
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"0ah5mi4j62b85a9rllv1004mzjb5cd0mn4glvz13p88rpx77pahp"))))
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(build-system gnu-build-system)
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(arguments
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'(#:patches (list (assoc-ref %build-inputs "patch/bison-tests"))))
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(inputs `(("patch/bison-tests" ,(search-patch "flex-bison-tests.patch"))
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("bison" ,bison)))
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(propagated-inputs `(("m4" ,m4)))
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(home-page "http://flex.sourceforge.net/")
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(synopsis "A fast lexical analyser generator")
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(description
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"Flex is a tool for generating scanners. A scanner, sometimes
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called a tokenizer, is a program which recognizes lexical patterns in
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text. The flex program reads user-specified input files, or its standard
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input if no file names are given, for a description of a scanner to
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generate. The description is in the form of pairs of regular expressions
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and C code, called rules. Flex generates a C source file named,
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\"lex.yy.c\", which defines the function yylex(). The file \"lex.yy.c\"
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can be compiled and linked to produce an executable. When the executable
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is run, it analyzes its input for occurrences of text matching the
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regular expressions for each rule. Whenever it finds a match, it
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executes the corresponding C code.")
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(license "BSD")))
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