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76 lines
3.1 KiB
Scheme
76 lines
3.1 KiB
Scheme
;;; GNU Guix --- Functional package management for GNU
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;;; Copyright © 2012, 2013, 2014, 2019 Ludovic Courtès <ludo@gnu.org>
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;;; Copyright © 2016 Efraim Flashner <efraim@flashner.co.il>
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;;;
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;;; This file is part of GNU Guix.
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;;;
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;;; GNU 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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;;; GNU 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 GNU Guix. If not, see <http://www.gnu.org/licenses/>.
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(define-module (gnu packages flex)
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#:use-module (guix licenses)
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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 (guix utils)
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#:use-module (gnu packages)
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#:use-module (gnu packages m4)
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#:use-module (gnu packages man)
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#:use-module (gnu packages bison)
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#:use-module (srfi srfi-1))
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(define-public flex
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(package
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(name "flex")
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(version "2.6.4")
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(source (origin
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(method url-fetch)
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(uri (string-append
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"https://github.com/westes/flex"
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"/releases/download/v" version "/"
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"flex-" version ".tar.gz"))
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(sha256
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(base32
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"15g9bv236nzi665p9ggqjlfn4dwck5835vf0bbw2cz7h5c1swyp8"))))
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(build-system gnu-build-system)
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(inputs
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(let ((bison-for-tests
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(package
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(inherit bison)
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(arguments
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;; Disable tests, since they require flex.
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(substitute-keyword-arguments (package-arguments bison)
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((#:tests? _ #f) #f)))
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(inputs (alist-delete "flex" (package-inputs bison))))))
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`(("bison" ,bison-for-tests))))
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;; m4 is not present in PATH when cross-building
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(native-inputs
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`(("help2man" ,help2man)
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("m4" ,m4)))
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(propagated-inputs `(("m4" ,m4)))
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(home-page "https://github.com/westes/flex")
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(synopsis "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 (non-copyleft "file://COPYING"
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"See COPYING in the distribution."))))
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