/*
 * 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
 */

#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;
}
