configure

早期freebsd实现

EOT
		case "$d_phostcmd" in
		"$define") dflt=n;;
		"$undef")  dflt=y;;
		'')
			case "$d_portable" in
			"$define") dflt=n ;;
			*) dflt=y ;;
			esac;;
		esac
		rp="Do you want your host name compiled in?"
		. ./myread
		case "$ans" in
		n*) ;;
		*) aphostcmd='';;
		esac;;
	esac;;
esac
case "$aphostcmd" in
'') d_phostcmd="$undef";;
*) d_phostcmd="$define";;
esac

: see if there is a getpwent
echo " "
if set getpwent val -f d_getpwent; eval $csym; $val; then
	echo "getpwent() found." >&4
	val="$define"
else
	echo "No getpwent() found -- will use getpw() instead." >&4
	val="$undef"
fi
set d_getpwent
eval $setvar

: where do we get termlib routines from
echo " "
ans=`./loc libcurses.a x $libpth`
case "$ans" in
/*)
	ar t $ans >grimble
	if $contains tputs.o grimble >/dev/null 2>&1; then
		termlib='-lcurses'
		d_havetlib="$define"
		echo "Terminfo library found." >&4
	else
		ans=x
	fi
	rm -f grimble
	;;
esac
case "$ans" in
x)
	ans=`loc libtermlib.a x $libpth`
	case "$ans" in
	/usr/lib*|/lib*)
		termlib='-ltermlib'
		d_havetlib="$define"
		echo "Termlib library found." >&4
		;;
	/*)
		termlib="$ans"
		d_havetlib="$define"
		echo "Termlib library found." >&4
		;;
	*)
		ans=`loc libtermcap.a x $libpth`
		case "$ans" in
		/usr/lib*|/lib*)
			termlib='-ltermcap'
			d_havetlib="$define"
			echo "Termcap library found." >&4
			;;
		/*)
			termlib="$ans"
			d_havetlib="$define"
			echo "Termcap library found." >&4
			;;
		*)
			case "$termlib" in
			'')
				dflt=y
rp="Your system appears to NOT have termlib-style routines. Is this true?"
				. ./myread
				case "$ans" in
				n*|f*) d_havetlib="$define"
					$cat <<'EOM'
Then where are the termlib-style routines kept? Specify either -llibname
or a full pathname (~name ok).

EOM
					dflt=''
					rp='Specify termlib path:'
					. ./myread
					termlib=`filexp $ans`
					;;
				*)
					d_havetlib="$undef"
					termlib=''
					echo "You will have to play around with term.c then." >&4
					;;
				esac
			echo " ";;
			*)  echo "You said termlib was $termlib before." >&4;;
			esac;;
		esac;;
	esac;;
esac

: Decide whether to ignore the ORGANIZATION environment variable
case "$d_ignoreorg" in
"$define") dflt=y ;;
*)         dflt=n ;;
esac
cat <<'EOM'

Trn normally looks in the environment variables NEWSORG and ORGANIZATION
for an overriding organization name.  However, if your operating system
reserves the environment variable ORGANIZATION for other purposes, you
will want to ignore it and only have trn check for NEWSORG.

EOM
rp='Should trn ignore ORGANIZATION?'
. ./myread
case "$ans" in
y*) d_ignoreorg="$define" ;;
*)  d_ignoreorg="$undef" ;;
esac

: determine the name of a reasonable mailer
case "$mailer" in
'')
	if $test -f "$sendmail"; then
		dflt="$sendmail"
	elif $test -f "$smail"; then
		dflt="$smail"
	elif $test -f "$rmail"; then
		dflt="$rmail"
	elif $test -f /bin/mail; then
		dflt=/bin/mail
	else
		dflt=$mail
	fi
	;;
*)  dflt="$mailer";;
esac
$cat <<EOM

I need the full pathname of the program used to deliver mail on your system.
A typical answer would be /usr/lib/sendmail or /bin/rmail, but you may choose
any other program, as long as $package can feed its standard input and it
will honour any user-supplied headers.

EOM
fn=f
rp='Mail transport agent to be used?'
. ./getfile
mailer="$ans"

: check for internet mailer
case "$d_internet" in
"$undef") dflt=n;;
*)	  dflt=y;;
esac
cat <<EOM
 
Most mailers can deliver mail to addresses of the INTERNET persuasion,
such as [e-mail].  Some older mailers, however, require the complete
path to the destination to be specified in the address.

EOM
rp="Does your mailer understand INTERNET addresses?"
. ./myread
case "$ans" in
y*) val="$define";;
*)  val="$undef";;
esac
set d_internet
eval $setvar

: see how we invoke the C preprocessor
echo " "
echo "Now, how can we feed standard input to your C preprocessor..." >&4
cat <<'EOT' >testcpp.c
#define ABC abc
#define XYZ xyz
ABC.XYZ
EOT
cd ..
echo 'cat >.$$.c; '"$cc"' -E ${1+"$@"} .$$.c; rm .$$.c' >cppstdin
chmod 755 cppstdin
wrapper=`pwd`/cppstdin
cd UU
if $test "X$cppstdin" != "X" && \
	$cppstdin $cppminus <testcpp.c >testcpp.out 2>&1 && \
	$contains 'abc.*xyz' testcpp.out >/dev/null 2>&1 ; then
	echo "You used to use $cppstdin $cppminus so we'll use that again."
elif $test "$cc" = gcc && \
	(echo "Using gcc, eh?  We'll try to force gcc -E using a wrapper..."; \
	$wrapper <testcpp.c >testcpp.out 2>&1; \
	$contains 'abc.*xyz' testcpp.out >/dev/null 2>&1) ; then
	echo "Yup, we can."
	cppstdin="$wrapper"
	cppminus='';
elif echo 'Maybe "'"$cc"' -E" will work...'; \
	$cc -E <testcpp.c >testcpp.out 2>&1; \
	$contains 'abc.*xyz' testcpp.out >/dev/null 2>&1 ; then
	echo "Yup, it does."
	cppstdin="$cc -E"
	cppminus='';
elif echo 'Nope...maybe "'"$cc"' -E -" will work...'; \
	$cc -E - <testcpp.c >testcpp.out 2>&1; \
	$contains 'abc.*xyz' testcpp.out >/dev/null 2>&1 ; then
	echo "Yup, it does."
	cppstdin="$cc -E"
	cppminus='-';
elif echo 'Uh-uh.  Time to get fancy.  Trying a wrapper...'; \
	$wrapper <testcpp.c >testcpp.out 2>&1; \
	$contains 'abc.*xyz' testcpp.out >/dev/null 2>&1 ; then
	cppstdin="$wrapper"
	cppminus=''
	echo "Eureka!"
elif echo 'No such luck, maybe "'$cpp'" will work...'; \
	$cpp <testcpp.c >testcpp.out 2>&1; \
	$contains 'abc.*xyz' testcpp.out >/dev/null 2>&1 ; then
	echo "It works!"
	cppstdin="$cpp"
	cppminus='';
elif echo 'Nixed again...maybe "'$cpp' -" will work...'; \
	$cpp - <testcpp.c >testcpp.out 2>&1; \
	$contains 'abc.*xyz' testcpp.out >/dev/null 2>&1 ; then
	echo "Hooray, it works!  I was beginning to wonder."
	cppstdin="$cpp"
	cppminus='-';
elif echo 'Nope...maybe "'"$cc"' -P" will work...'; \
	$cc -P <testcpp.c >testcpp.out 2>&1; \
	$contains 'abc.*xyz' testcpp.out >/dev/null 2>&1 ; then
	echo "Yipee, that works!"
	cppstdin="$cc -P"
	cppminus='';
elif echo 'Nope...maybe "'"$cc"' -P -" will work...'; \
	$cc -P - <testcpp.c >testcpp.out 2>&1; \
	$contains 'abc.*xyz' testcpp.out >/dev/null 2>&1 ; then
	echo "At long last!"
	cppstdin="$cc -P"
	cppminus='-';
else
	dflt=''
	rp="No dice.  I can't find a C preprocessor.  Name one:"
	. ./myread
	cppstdin="$ans"
	$cppstdin <testcpp.c >testcpp.out 2>&1
	if $contains 'abc.*xyz' testcpp.out >/dev/null 2>&1 ; then
		echo "OK, that will do." >&4
	else
echo "Sorry, I can't get that to work.  Go find one and rerun Configure." >&4
		exit 1
	fi
fi
$rm -f testcpp.c testcpp.out

: determine filename position in cpp output
echo " "
echo "Computing filename position in cpp output for #include directives..." >&4
echo '#include <stdio.h>' > foo.c
$cat >fieldn <<EOF
$startsh
$cppstdin $cppminus $cppflags <foo.c 2>/dev/null | \
$grep '^[ 	]*#.*stdio\.h' | \
while read cline; do
	pos=1
	set \$cline
	while $test \$# -gt 0; do
		if $test -r \`echo \$1 | $tr -d '"'\`; then
			echo "\$pos"
			exit 0
		fi
		shift
		pos=\`expr \$pos + 1\`
	done
done
EOF
chmod +x fieldn
fieldn=`./fieldn`
$rm -f foo.c fieldn
case $fieldn in
'') pos='???';;
1) pos=first;;
2) pos=second;;
3) pos=third;;
*) pos="${fieldn}th";;
esac
echo "Your cpp writes the filename in the $pos field of the line."

: locate header file
$cat >findhdr <<EOF
$startsh
wanted=\$1
name=''
if test -f $usrinc/\$wanted; then
	echo "$usrinc/\$wanted"
	exit 0
fi
awkprg='{ print \$$fieldn }'
echo "#include <\$wanted>" > foo\$\$.c
$cppstdin $cppminus $cppflags < foo\$\$.c 2>/dev/null | \
$grep "^[ 	]*#.*\$wanted" | \
while read cline; do
	name=\`echo \$cline | $awk "\$awkprg" | $tr -d '"'\`
	case "\$name" in
	*/\$wanted) echo "\$name"; exit 0;;
	*) name='';;
	esac;
done;
$rm -f foo\$\$.c;
case "\$name" in
'') exit 1;;
esac
EOF
chmod +x findhdr

: see if there are directory access routines out there
echo " "
if $test `./findhdr ndir.h` && \
	  ( $test -r /usr/lib/libndir.a || $test -r /usr/local/lib/libndir.a ); then
	echo "Ndir library found." >&4
	if $test -r /usr/lib/libndir.a; then
		libndir='-lndir'
	else
		libndir="/usr/local/lib/libndir.a"
	fi
	d_libndir="$define"
	d_usendir="$undef"
	ndirc=''
	ndiro=''
else
	libndir=''
	d_libndir="$undef"
	if set readdir val -f; eval $csym; $val; then
	echo "No ndir library found, but you have readdir() so we'll use that." >&4
		d_usendir="$undef"
		ndirc=''
		ndiro=''
	else
		echo "No ndir library found--using ./ndir.c." >&4
		d_usendir="$define"
		ndirc='ndir.c'
		ndiro='ndir.o'
	fi
fi

: get news administrator name
case "$newsadmin" in
'')
	if $contains "^news:" /etc/passwd >/dev/null 2>&1 ; then
		dflt=news
	elif $contains "^usenet:" /etc/passwd >/dev/null 2>&1 ; then
		dflt=usenet
	elif eunice; then
		dflt=system
	else
		dflt=root
	fi
	;;
*)
	dflt="$newsadmin"
	;;
esac
$cat <<'EOM'
 
Many systems keep their news in a private directory, or have a non-superuser
in charge of administering news.  (If you don't have such a user, take the
default answer.)  I need the login name (not directory) which is used for
news administration.

EOM
rp="News admin login?"
. ./myread
newsadmin="$ans"
case "$newsadmin" in
root) val="$undef" ;;
*) val="$define" ;;
esac
set d_newsadm
eval $setvar

: check for buffering of stdout
echo " "
case "$d_nolnbuf" in
'')
	$cat <<'EOT' >blurfl.c
#include <stdio.h>
main()
{
	int i;

	for (i = 0; i < 5; i++) {
		putchar(i+'a');
		sleep(1);
	}
	putchar('\n');
}
EOT
	$cc blurfl.c -o blurfl >/dev/null 2>&1;
	$rm -f blurfl.c
	$cat >&4 <<'EOM'
Checking for buffering of stdout to terminal.

Observe the following characters as they are printed out, to see whether they
print out all at once, or with a 1 second pause between each of them.  If they
print out one by one, you don't have buffering.  If they print together (after
about a 5 second pause), you do have buffering.

EOM
	dflt=''
	rp="Type return to start printing the test characters:"
	. ./myread
	ans=y
	while $test "$ans" = 'y'; do
		blurfl 1>&4
		dflt=n
		rp='Would you like to see that again?'
		. ./myread
	done
		dflt=y
		rp="Do you have buffering (printed all at once)?"
		. ./myread
		case "$ans" in
		n*) val="$define";;
		*)  val="$undef";;
		esac
		;;
*)
	case "$d_nolnbuf" in
	"$define") dflt=n;;
	*) dflt=y;;
	esac
	rp="Do you have buffering on stdout to terminals?"
	. ./myread
	case "$ans" in
	n*) val="$define";;
	*)  val="$undef";;
	esac
	;;
esac
set d_nolnbuf
eval $setvar

: see if we need -ljobs and if we have sigset, etc.
echo " "
if $test -r /usr/lib/libjobs.a || $test -r /usr/local/lib/libjobs.a ; then
	echo "Jobs library found." >&4
	val="$undef"
	jobslib='-ljobs'
else
	if bsd; then
		echo "No jobs library found. (I suppose this is at least 4.2...)" >&4
	else
		echo "No jobs library found. (That's okay, we all have our faults.)" >&4
	fi
	val="$define"
	jobslib=''
fi
set d_normsig
eval $setvar

: get C preprocessor symbols handy
echo " "
echo $attrlist | $tr ' ' '\012' >Cppsym.know
$cat <<EOSS >Cppsym
$startsh
case "\$1" in
-l) list=true
	shift
	;;
esac
unknown=''
case "\$list\$#" in
1|2)
	for sym do
		if $contains "^\$1$" Cppsym.true >/dev/null 2>&1; then
			exit 0
		elif $contains "^\$1$" Cppsym.know >/dev/null 2>&1; then
			:
		else
			unknown="\$unknown \$sym"
		fi
	done
	set X \$unknown
	shift
	;;
esac
case \$# in
0) exit 1;;
esac
echo \$* | $tr ' ' '\012' | $sed -e 's/\(.*\)/\\
#ifdef \1\\
exit 0; _ _ _ _\1\\	 \1\\
#endif\\
/' >Cppsym\$\$
echo "exit 1; _ _ _" >>Cppsym\$\$
$cppstdin $cppminus <Cppsym\$\$ | $grep '^exit [01]; _ _'  >Cppsym2\$\$
case "\$list" in
true) $awk 'NF > 5 {print substr(\$6,2,100)}' <Cppsym2\$\$ ;;
*)
	sh Cppsym2\$\$
	status=\$?
	;;
esac
$rm -f Cppsym\$\$ Cppsym2\$\$
exit \$status
EOSS
chmod +x Cppsym
$eunicefix Cppsym
echo "Your C preprocessor defines the following symbols:"
Cppsym -l $attrlist >Cppsym.true
$cat Cppsym.true

: see if there is a vfork
$echo " "
if set vfork val -f d_hvfork; eval $csym; $val; then
	$echo "vfork() found." >&4
	if Cppsym sgi; then
		$echo "However, IRIX vfork() is buggy. We'll use fork() instead." >&4
		val="$define"
	else
		val="$undef"
	fi
else
	$echo "No vfork() found--will use fork() instead." >&4
	val="$define"
fi
set d_novfork
eval $setvar
case "$d_novfork" in
"$define") d_hvfork="$undef";;
*)	   d_hvfork="$define";;
esac

: check for void type
echo " "
$echo "Checking to see how well your C compiler groks the void type..."
$cat >void.c <<'EOCP'
void main();
EOCP
if $cc -c void.c >/dev/null 2>&1 ; then
    d_novoid="$undef"
    $echo "Yup, it does."
else
    d_novoid="$define"
    $echo "Nope, it doesn't (boo hiss).  I will substitute int."
fi
$rm void.*

: see if rdchk exists
set rdchk d_rdchk
eval $inlibc

: see if rename exists
set rename d_rename
eval $inlibc

: see if sigblock exists
if set sigblock val -f d_sigblock; eval $csym; $val; then
	$echo "sigblock() found." >&4
	if Cppsym sgi; then
		$echo "We'll ignore it on this Silicon Graphics box, though."
		val="$undef"
	else
		val="$define"
	fi
else
	val="$undef"
fi
set d_sigblock
eval $setvar

: see if sighold exists
set sighold d_sighold
eval $inlibc

: see if we need to define size_t
if $contains 'size_t' /usr/include/string*.h >/dev/null 2>&1 ; then
    d_sizet="$undef"
else
    d_sizet="$define"
fi

: index or strchr
$echo " "
if set index val -f; eval $csym; $val; then
	val="$undef"
	$echo "index() found." >&4
elif set strchr val -f d_strchr; eval $csym; $val; then
	val="$define"
	$echo "strchr() found." >&4
else
	$echo "No index() or strchr() found!" >&4
	val="$undef"
fi
set d_strchr
eval $setvar

: see if