xref: /dragonfly/contrib/bmake/mk/yacc.mk (revision 9e7ae5a0527a977cab412aede3a532cfe2903bbb) 
1# $Id: yacc.mk,v 1.8 2022/06/22 04:51:06 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# first deal with explicit *.y in SRCS
27.for y in ${SRCS:M*.y}
28.if ${YACC.y:M-d} == "" || defined(NO_RENAME_Y_TAB_H)
29.ORDER: ${y:T:R}.c y.tab.h
30y.tab.h: .NOMETA
31${y:T:R}.c y.tab.h: $y
32          ${YACC.y} ${.IMPSRC}
33          [ ! -s y.tab.c ] || mv y.tab.c ${.TARGET}
34          ${RM} -f y.tab.[!h]
35.else
36.ORDER: ${y:T:R}.c ${y:T:R}.h
37${y:T:R}.h: .NOMETA
38${y:T:R}.c ${y:T:R}.h: $y
39          ${YACC.y} ${.IMPSRC}
40          [ ! -s y.tab.c ] || mv y.tab.c ${.TARGET:T:R}.c
41          [ ! -s y.tab.h ] || cmp -s y.tab.h ${.TARGET:T:R}.h \
42                    || mv y.tab.h ${.TARGET:T:R}.h
43          ${RM} -f y.tab.*
44.endif
45.endfor
46
47.if ${SRCS:M*.y} == ""
48.if ${YACC.y:M-d} == "" || defined(NO_RENAME_Y_TAB_H)
49
50.y.c:
51          ${YACC.y} ${.IMPSRC}
52          [ ! -s y.tab.c ] || mv y.tab.c ${.TARGET}
53          ${RM} -f y.tab.[!h]
54
55.else
56
57# the touch of the .c is to ensure it is newer than .h (paranoia)
58.y.h:
59          ${YACC.y} ${.IMPSRC}
60          [ ! -s y.tab.c ] || mv y.tab.c ${.TARGET:T:R}.c
61          [ ! -s y.tab.h ] || cmp -s y.tab.h ${.TARGET:T:R}.h \
62                    || mv y.tab.h ${.TARGET:T:R}.h
63          touch ${.TARGET:T:R}.c
64          ${RM} -f y.tab.*
65
66# Normally the .y.h rule does the work - to avoid races.
67# If for any reason the .c is lost but the .h remains,
68# regenerate the .c
69.y.c:     ${.TARGET:T:R}.h
70          [ -s ${.TARGET} ] || { \
71                    ${YACC.y} ${.IMPSRC} && \
72                    { [ ! -s y.tab.c ] || mv y.tab.c ${.TARGET}; \
73                    ${RM} y.tab.*; }; }
74.endif
75.endif
76
77beforedepend:       ${SRCS:T:M*.y:S/.y/.c/g}
78
79CLEANFILES+= ${SRCS:T:M*.y:S/.y/.[ch]/g}
80CLEANFILES+= y.tab.[ch]
81
82