1## Replacement for AC_PROG_LEX. -*- Autoconf -*- 2## by Alexandre Oliva <oliva@dcc.unicamp.br> 3# Copyright (C) 1998-2021 Free Software Foundation, Inc. 4# 5# This file is free software; the Free Software Foundation 6# gives unlimited permission to copy and/or distribute it, 7# with or without modifications, as long as this notice is preserved. 8 9# AM_PROG_LEX 10# ----------- 11# Autoconf leaves LEX=: if lex or flex can't be found. Change that to a 12# "missing" invocation, for better error output. 13AC_DEFUN([AM_PROG_LEX], 14[AC_PREREQ([2.50])dnl 15AC_REQUIRE([AM_MISSING_HAS_RUN])dnl 16AC_REQUIRE([AC_PROG_LEX])dnl 17if test "$LEX" = :; then 18 LEX=${am_missing_run}flex 19fi]) 20