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Makefile
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# $OpenBSD: Makefile,v 1.16 2017/07/10 21:30:37 espie Exp $
PROG= awk
SRCS= ytab.c lex.c b.c main.c parse.c proctab.c tran.c lib.c run.c reallocarray.c strlcpy.c strlcat.c
PKG_CONFIG?= pkg-config
LDADD= -lm
DPADD= ${LIBM}
CLEANFILES+=proctab.c maketab ytab.c ytab.h
CURDIR= $(shell pwd)
CC?= cc
HOSTCC?= $(CC)
CFLAGS+=-I. -I${CURDIR} -DHAS_ISBLANK -DNDEBUG
HOSTCFLAGS+=-I. -I${CURDIR} -DHAS_ISBLANK -DNDEBUG
DESTDIR?=
PREFIX?=/usr
BINDIR=$(PREFIX)/bin
MANDIR=$(PREFIX)/man
all: $(PROG)
$(PROG): proctab.c
$(CC) $(CFLAGS) $(SRCS) $(LDFLAGS) $(LDADD) -o $(PROG)
ytab.c ytab.h: awkgram.y
${YACC} -o ytab.c -d ${CURDIR}/awkgram.y
BUILDFIRST = ytab.h
proctab.c: ytab.h maketab.c
${HOSTCC} ${HOSTCFLAGS} ${CURDIR}/maketab.c -o maketab
./maketab >proctab.c
install: $(PROG)
install -D -m 755 $(PROG) $(DESTDIR)/$(BINDIR)/$(PROG)
install -D -m 644 $(PROG).1 $(DESTDIR)/$(MANDIR)/man1/$(PROG).1