;;; GNU Guix --- Functional package management for GNU
;;; Copyright © 2012, 2013, 2014, 2019 Ludovic Courtès <ludo@gnu.org>
;;; Copyright © 2016 Efraim Flashner <efraim@flashner.co.il>
;;; Copyright © 2024 Janneke Nieuwenhuizen <janneke@gnu.org>
;;;
;;; This file is part of GNU Guix.
;;;
;;; GNU Guix is free software; you can redistribute it and/or modify it
;;; under the terms of the GNU General Public License as published by
;;; the Free Software Foundation; either version 3 of the License, or (at
;;; your option) any later version.
;;;
;;; GNU Guix is distributed in the hope that it will be useful, but
;;; WITHOUT ANY WARRANTY; without even the implied warranty of
;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
;;; GNU General Public License for more details.
;;;
;;; You should have received a copy of the GNU General Public License
;;; along with GNU Guix.  If not, see <http://www.gnu.org/licenses/>.

(define-module (gnu packages flex)
  #:use-module (guix licenses)
  #:use-module (guix packages)
  #:use-module (guix download)
  #:use-module (guix build-system gnu)
  #:use-module (guix gexp)
  #:use-module (guix utils)
  #:use-module (gnu packages)
  #:use-module (gnu packages m4)
  #:use-module (gnu packages man)
  #:use-module (gnu packages bison)
  #:use-module (srfi srfi-1))

(define-public flex
  (package
    (name "flex")
    (version "2.6.4")
    (source (origin
              (method url-fetch)
              (uri (string-append
                    "https://github.com/westes/flex"
                    "/releases/download/v" version "/"
                    "flex-" version ".tar.gz"))
              (sha256
               (base32
                "15g9bv236nzi665p9ggqjlfn4dwck5835vf0bbw2cz7h5c1swyp8"))))
    (build-system gnu-build-system)
    (inputs
     (let ((bison-for-tests
            (package
              (inherit bison)
              (arguments
               ;; Disable tests, since they requi<pre>
dnl -*- Autoconf -*- fragment for the C++ daemon.

AC_MSG_CHECKING([whether to build daemon])
AC_MSG_RESULT([$guix_build_daemon])

dnl C++ environment.  This macro must be used unconditionnaly.
AC_PROG_CXX
AM_PROG_AR
AC_LANG([C++])

if test &quot;x$guix_build_daemon&quot; = &quot;xyes&quot;; then

  GUIX_ASSERT_CXX11

  AC_PROG_RANLIB
  AC_CONFIG_HEADERS([nix/config.h])

  dnl Use 64-bit file system calls so that we can support files &gt; 2 GiB.
  AC_SYS_LARGEFILE

  dnl Look for zlib, a required dependency.
  AC_CHECK_LIB([z], [gzdopen], [true],
    [AC_MSG_ERROR([Guix requires zlib.  See http://www.zlib.net/.])])
  AC_CHECK_HEADERS([zlib.h], [true],
    [AC_MSG_ERROR([Guix requires zlib.  See http://www.zlib.net/.])])

  dnl Look for libbz2, an optional dependency.
  AC_CHECK_LIB([bz2], [BZ2_bzWriteOpen], [HAVE_LIBBZ2=yes], [HAVE_LIBBZ2=no])
  if test &quot;x$HAVE_LIBBZ2&quot; = xyes; then
    AC_CHECK_HEADERS([bzlib.h])
    HAVE_LIBBZ2=&quot;$ac_cv_header_bzlib_h&quot;
  fi

  dnl Look for SQLite, a required dependency.
  PKG_CHECK_MODULES([SQLITE3], [sqlite3 &gt;= 3.6.19])

  AC_DEFINE_UNQUOTED([SYSTEM], [&quot;$guix_system&quot;],
    [Guix host system type--i.e., platform and OS kernel tuple.])

  case &quot;$LIBGCRYPT_PREFIX&quot; in
    no)
      LIBGCRYPT_CPPFLAGS=&quot;&quot;
      ;;
    *)
      LIBGCRYPT_CPPFLAGS=&quot;-I$LIBGCRYPT_PREFIX/include&quot;
      ;;
  esac

  case &quot;$LIBGCRYPT_LIBDIR&quot; in
    no | &quot;&quot;)
      ;;
    *)
      LIBGCRYPT_LDFLAGS=&quot;-L$LIBGCRYPT_LIBDIR&quot;
      ;;
  esac

  LIBGCRYPT_LIBS=&qu