kconfig: split the lexer out of zconf.y

# ===========================================================================

# object files used by all kconfig flavours

common-objs	:= confdata.o expr.o symbol.o preprocess.o zconf.tab.o

common-objs	:= confdata.o expr.o symbol.o preprocess.o zconf.lex.o zconf.tab.o

targets		+= zconf.lex.c

# generated files seem to need this to find local include files

$(obj)/zconf.lex.o: $(obj)/zconf.tab.h

HOSTCFLAGS_zconf.lex.o	:= -I$(src)

HOSTCFLAGS_zconf.tab.o	:= -I$(src)

$(obj)/gconf.o: $(obj)/.gconf-cfg

$(obj)/zconf.tab.o: $(obj)/zconf.lex.c

# check if necessary packages are available, and configure build flags

define filechk_conf_cfg

	$(CONFIG_SHELL) $<

char *xstrdup(const char *s);

char *xstrndup(const char *s, size_t n);

/* zconf.l */

int yylex(void);

struct gstr {

	size_t len;

	char  *s;

#include <unistd.h>

#include "lkc.h"

#include "zconf.tab.h"

#define YY_DECL		static int yylex1(void)

int cdebug = PRINTD;

int yylex(void);

static void yyerror(const char *err);

static void zconfprint(const char *err, ...);

static void zconf_error(const char *err, ...);

	}

}

#include "zconf.lex.c"

#include "util.c"

#include "menu.c"