/*
 * NAME
 *      lex - the lex cookbook
 *
 * DESCRIPTION
 *      This cookbook describes how to work with lex files.
 *
 * RECIPES
 *      %.l: %.c        make C source files from lex source files
 *
 * VARIABLES
 *      lex             The lex command
 *                      Not altered if already defined.
 *      lex_flags       Options to pass to the lex command
 *                      Not altered if already defined.
 *                      The default is empty.
 *      lex_src         lex source files in the current directory.
 *      dot_src         Source files constructable in the current directory
 *                      (unioned with existing setting, if necessary).
 *      dot_obj         Object files constructable in the current directory
 *                      (unioned with existing setting, if necessary).
 *      dot_clean       Files which may be removed from the current directory
 *                      in a clean target.
 *      dot_lint_obj    Lint object files constructable in the current directory
 *                      (unioned with existing setting, if necessary).
 *
 * MANIFEST: cookbook for using lex
 * Copyright (C) 1997-2007 Peter Miller
 */

#pragma once

#include "c"

if [not [defined lex]] then
        lex = lex;
if [not [defined lex_flags]] then
        lex_flags = ;
lex_src = [glob *.l];
dot_src =
        [stringset
                [dot_src] [lex_src]
        -
                [fromto %.l %.c [lex_src]]
                [fromto %.l %.s [lex_src]]
        ];
dot_obj = [stringset [dot_obj] [fromto %.l %.o [lex_src]]];
dot_clean =
        [stringset
                [dot_clean]
                [fromto %.l %.c [lex_src]]
                [fromto %.l %.ln [lex_src]]
                [fromto %.l %.s [lex_src]]
                lex.yy.c
        ];
dot_lint_obj = [stringset [dot_lint_obj] [fromto %.l %.ln [lex_src]]];

%.c: %.l
        single-thread lex.yy.c
{
        [lex] [lex_flags] %.l;
        mv lex.yy.c %.c;
}