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Make sure typing "make install" twice in a row
installs manuals twice, not only the first time.

Admittedly, marking real target files as .PHONY is ugly,
but this is the least complex fix found so far.
If somebody comes up with something better,
i will gladly improve this.

Problem originally reported and some prodding by deraadt@.

#	$OpenBSD: bsd.man.mk,v 1.38 2011/07/06 20:40:32 schwarze Exp $
#	$NetBSD: bsd.man.mk,v 1.23 1996/02/10 07:49:33 jtc Exp $
#	@(#)bsd.man.mk	5.2 (Berkeley) 5/11/90

.if !target(.MAIN)
.  if exists(${.CURDIR}/../Makefile.inc)
.    include "${.CURDIR}/../Makefile.inc"
.  endif

.MAIN: all
.endif

BEFOREMAN?=
MANLINT=${MAN:S/$/.manlint/}
CLEANFILES+=.man-linted ${MANLINT}

# Add / so that we don't have to specify it.
.if defined(MANSUBDIR) && !empty(MANSUBDIR)
MANSUBDIR:=${MANSUBDIR:S,^,/,:S,$,/,}
.else
MANSUBDIR=/
.endif

# Files contained in ${BEFOREMAN} must be built before generating any
# manual page source code.  However, static manual page files contained
# in the source tree must not appear as targets, or the ${.IMPSRC} in
# the .man.manlint suffix rule below will not find them in the .PATH.
.for page in ${MAN}
.  if target(${page})
${page}: ${BEFOREMAN}
.  endif
.endfor

# In any case, ${BEFOREMAN} must be finished before linting any manuals.
.if !empty(MANLINT)
${MANLINT}: ${BEFOREMAN}
.endif

# Set up the suffix rules for checking manuals.
_MAN_SUFFIXES=1 2 3 3p 4 5 6 7 8 9
.for s in ${_MAN_SUFFIXES}
.SUFFIXES: .${s} .${s}.manlint
.${s}.${s}.manlint:
	mandoc -Tlint -Wfatal ${.IMPSRC}
	@touch ${.TARGET}
.endfor

# Install the real manuals.
.for page in ${MAN}
.  for sub in ${MANSUBDIR}
_MAN_INST=${DESTDIR}${MANDIR}${page:E}${sub}${page:T}
${_MAN_INST}: ${page}
	${INSTALL} ${INSTALL_COPY} -o ${MANOWN} -g ${MANGRP} -m ${MANMODE} \
		${.ALLSRC} ${.TARGET}

maninstall: ${_MAN_INST}

.PHONY: ${_MAN_INST}
.  endfor
.endfor

# Install the manual hardlinks, if any.
maninstall:
.if defined(MLINKS) && !empty(MLINKS)
.  for sub in ${MANSUBDIR}
.     for lnk file in ${MLINKS}
	@l=${DESTDIR}${MANDIR}${lnk:E}${sub}${lnk}; \
	t=${DESTDIR}${MANDIR}${file:E}${sub}${file}; \
	echo $$t -\> $$l; \
	rm -f $$t; ln $$l $$t;
.     endfor
.  endfor
.endif

# Explicitly list ${BEFOREMAN} to get it done even if ${MAN} is empty.
all: ${BEFOREMAN} ${MAN} ${MANLINT}