58 lines
1.4 KiB
Makefile
58 lines
1.4 KiB
Makefile
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# $Id: yacc.mk,v 1.6 2011/06/10 22:45:46 sjg Exp $
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#
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# @(#) Copyright (c) 1999-2011, Simon J. Gerraty
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#
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# This file is provided in the hope that it will
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# be of use. There is absolutely NO WARRANTY.
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# Permission to copy, redistribute or otherwise
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# use this file is hereby granted provided that
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# the above copyright notice and this notice are
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# left intact.
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#
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# Please send copies of changes and bug-fixes to:
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# sjg@crufty.net
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#
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# this file contains rules to DTRT when SRCS contains foo.y or foo.c
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# when only a foo.y exists.
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YACC?= yacc
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YFLAGS?= -v -t
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RM?= rm
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YACC.y?= ${YACC} ${YFLAGS}
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.if ${YACC.y:M-d} == "" || defined(NO_RENAME_Y_TAB_H)
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.y.c:
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${YACC.y} ${.IMPSRC}
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[ ! -s y.tab.c ] || mv y.tab.c ${.TARGET}
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${RM} -f y.tab.[!h]
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.else
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# the touch of the .c is to ensure it is newer than .h (paranoia)
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.y.h:
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${YACC.y} ${.IMPSRC}
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[ ! -s y.tab.c ] || mv y.tab.c ${.TARGET:T:R}.c
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[ ! -s y.tab.h ] || cmp -s y.tab.h ${.TARGET:T:R}.h \
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|| mv y.tab.h ${.TARGET:T:R}.h
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touch ${.TARGET:T:R}.c
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${RM} -f y.tab.*
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# Normally the .y.h rule does the work - to avoid races.
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# If for any reason the .c is lost but the .h remains,
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# regenerate the .c
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.y.c: ${.TARGET:T:R}.h
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[ -s ${.TARGET} ] || { \
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${YACC.y} ${.IMPSRC} && \
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{ [ ! -s y.tab.c ] || mv y.tab.c ${.TARGET}; \
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${RM} y.tab.*; }; }
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.endif
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beforedepend: ${SRCS:T:M*.y:S/.y/.c/g}
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CLEANFILES+= ${SRCS:T:M*.y:S/.y/.[ch]/g}
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CLEANFILES+= y.tab.[ch]
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