| ## Replacement for AC_PROG_LEX. -*- Autoconf -*- |
| ## by Alexandre Oliva <oliva@dcc.unicamp.br> |
| # Copyright (C) 1998-2018 Free Software Foundation, Inc. |
| # |
| # This file is free software; the Free Software Foundation |
| # gives unlimited permission to copy and/or distribute it, |
| # with or without modifications, as long as this notice is preserved. |
| |
| # AM_PROG_LEX |
| # ----------- |
| # Autoconf leaves LEX=: if lex or flex can't be found. Change that to a |
| # "missing" invocation, for better error output. |
| AC_DEFUN([AM_PROG_LEX], |
| [AC_PREREQ([2.50])dnl |
| AC_REQUIRE([AM_MISSING_HAS_RUN])dnl |
| AC_REQUIRE([AC_PROG_LEX])dnl |
| if test "$LEX" = :; then |
| LEX=${am_missing_run}flex |
| fi]) |
