1# $Id: yacc.mk,v 1.6 2011/06/10 22:45:46 sjg Exp $ 2 3# 4# @(#) Copyright (c) 1999-2011, Simon J. Gerraty 5# 6# This file is provided in the hope that it will 7# be of use. There is absolutely NO WARRANTY. 8# Permission to copy, redistribute or otherwise 9# use this file is hereby granted provided that 10# the above copyright notice and this notice are 11# left intact. 12# 13# Please send copies of changes and bug-fixes to: 14# sjg@crufty.net 15# 16 17# this file contains rules to DTRT when SRCS contains foo.y or foo.c 18# when only a foo.y exists. 19 20YACC?= yacc 21YFLAGS?= -v -t 22RM?= rm 23 24YACC.y?= ${YACC} ${YFLAGS} 25 26.if ${YACC.y:M-d} == "" || defined(NO_RENAME_Y_TAB_H) 27 28.y.c: 29 ${YACC.y} ${.IMPSRC} 30 [ ! -s y.tab.c ] || mv y.tab.c ${.TARGET} 31 ${RM} -f y.tab.[!h] 32 33.else 34 35# the touch of the .c is to ensure it is newer than .h (paranoia) 36.y.h: 37 ${YACC.y} ${.IMPSRC} 38 [ ! -s y.tab.c ] || mv y.tab.c ${.TARGET:T:R}.c 39 [ ! -s y.tab.h ] || cmp -s y.tab.h ${.TARGET:T:R}.h \ 40 || mv y.tab.h ${.TARGET:T:R}.h 41 touch ${.TARGET:T:R}.c 42 ${RM} -f y.tab.* 43 44# Normally the .y.h rule does the work - to avoid races. 45# If for any reason the .c is lost but the .h remains, 46# regenerate the .c 47.y.c: ${.TARGET:T:R}.h 48 [ -s ${.TARGET} ] || { \ 49 ${YACC.y} ${.IMPSRC} && \ 50 { [ ! -s y.tab.c ] || mv y.tab.c ${.TARGET}; \ 51 ${RM} y.tab.*; }; } 52.endif 53 54beforedepend: ${SRCS:T:M*.y:S/.y/.c/g} 55 56CLEANFILES+= ${SRCS:T:M*.y:S/.y/.[ch]/g} 57CLEANFILES+= y.tab.[ch] 58