[p5sagit/p5-mst-13.2.git] / Configure

#! /bin/sh
#
# If these # comments don't work, trim them.  Don't worry about any other
# shell scripts, Configure will trim # comments from them for you.
#
# (If you are trying to port this package to a machine without sh, I would
# suggest you cut out the prototypical config.h from the end of Configure
# and edit it to reflect your system.  Some packages may include samples
# of config.h for certain machines, so you might look for one of those.)
#
# $Header: Configure,v 1.0 87/12/18 15:05:56 root Exp $
#
# Yes, you may rip this off to use in other distribution packages.
# (Note: this Configure script was generated automatically.  Rather than
# working with this copy of Configure, you may wish to get metaconfig.)

: sanity checks
PATH='.:/bin:/usr/bin:/usr/local/bin:/usr/ucb:/usr/local:/usr/lbin:/etc'
export PATH || (echo "OOPS, this isn't sh.  Desperation time.  I will feed myself to sh."; sh $0; kill $$)

if test ! -t 0; then
    echo "Say 'sh Configure', not 'sh <Configure'"
    exit 1
fi

(alias) >/dev/null 2>&1 && \
    echo "(I see you are using the Korn shell.  Some ksh's blow up on Configure," && \
    echo "especially on exotic machines.  If yours does, try the Bourne shell instead.)"

if test ! -d ../UU; then
    if test ! -d UU; then
        mkdir UU
    fi
    cd UU
fi

d_eunice=''
eunicefix=''
define=''
loclist=''
expr=''
sed=''
echo=''
cat=''
rm=''
mv=''
cp=''
tail=''
tr=''
mkdir=''
sort=''
uniq=''
grep=''
trylist=''
test=''
inews=''
egrep=''
more=''
pg=''
Mcc=''
vi=''
mailx=''
mail=''
Log=''
Header=''
bin=''
cc=''
contains=''
cpp=''
d_charsprf=''
d_index=''
d_strctcpy=''
d_vfork=''
libc=''
libnm=''
mansrc=''
manext=''
models=''
split=''
small=''
medium=''
large=''
huge=''
ccflags=''
ldflags=''
n=''
c=''
package=''
spitshell=''
shsharp=''
sharpbang=''
startsh=''
voidflags=''
defvoidused=''
CONFIG=''

: set package name
package=perl

echo " "
echo "Beginning of configuration questions for $package kit."
: Eunice requires " " instead of "", can you believe it
echo " "

define='define'
undef='/*undef'
libpth='/usr/lib /usr/local/lib /lib'
smallmach='pdp11 i8086 z8000 i80286 iAPX286'
rmlist='kit[1-9]isdone kit[1-9][0-9]isdone'
trap 'echo " "; rm -f $rmlist; exit 1' 1 2 3
attrlist="mc68000 sun gcos unix ibm gimpel interdata tss os mert pyr"
attrlist="$attrlist vax pdp11 i8086 z8000 u3b2 u3b5 u3b20 u3b200"
attrlist="$attrlist ns32000 ns16000 iAPX286"
pth="/usr/ucb /bin /usr/bin /usr/local /usr/local/bin /usr/lbin /etc /usr/lib"
defvoidused=7

: some greps do not return status, grrr.
echo "grimblepritz" >grimble
if grep blurfldyick grimble >/dev/null 2>&1 ; then
    contains=contains
elif grep grimblepritz grimble >/dev/null 2>&1 ; then
    contains=grep
else
    contains=contains
fi
rm -f grimble
: the following should work in any shell
case "$contains" in
contains*)
    echo " "
    echo "AGH!  Grep doesn't return a status.  Attempting remedial action."
    cat >contains <<'EOSS'
grep "$1" "$2" >.greptmp && cat .greptmp && test -s .greptmp
EOSS
chmod 755 contains
esac

: first determine how to suppress newline on echo command
echo "Checking echo to see how to suppress newlines..."
(echo "hi there\c" ; echo " ") >.echotmp
if $contains c .echotmp >/dev/null 2>&1 ; then
    echo "...using -n."
    n='-n'
    c=''
else
    cat <<'EOM'
...using \c
EOM
    n=''
    c='\c'
fi
echo $n "Type carriage return to continue.  Your cursor should be here-->$c"
read ans
rm -f .echotmp

: now set up to do reads with possible shell escape and default assignment
cat <<EOSC >myread
ans='!'
while expr "X\$ans" : "X!" >/dev/null; do
    read ans
    case "\$ans" in
    !)
        sh
        echo " "
        echo $n "\$rp $c"
        ;;
    !*)
        set \`expr "X\$ans" : "X!\(.*\)\$"\`
        sh -c "\$*"
        echo " "
        echo $n "\$rp $c"
        ;;
    esac
done
rp='Your answer:'
case "\$ans" in
'') ans="\$dflt";;
esac
EOSC

: general instructions
cat <<EOH
 
This installation shell script will examine your system and ask you questions
to determine how the $package package should be installed.  If you get stuck
on a question, you may use a ! shell escape to start a subshell or execute
a command.  Many of the questions will have default answers in square
brackets--typing carriage return will give you the default.

On some of the questions which ask for file or directory names you are
allowed to use the ~name construct to specify the login directory belonging
to "name", even if you don't have a shell which knows about that.  Questions
where this is allowed will be marked "(~name ok)".

EOH
rp="[Type carriage return to continue]"
echo $n "$rp $c"
. myread
cat <<EOH

Much effort has been expended to ensure that this shell script will run
on any Unix system.  If despite that it blows up on you, your best bet is
to edit Configure and run it again. Also, let me (lwall@sdcrdcf.UUCP) know
how I blew it.  If you can't run Configure for some reason, you'll have
to generate a config.sh file by hand.

This installation script affects things in two ways: 1) it may do direct
variable substitutions on some of the files included in this kit, and
2) it builds a config.h file for inclusion in C programs.  You may edit
any of these files as the need arises after running this script.

If you make a mistake on a question, there is no easy way to back up to it
currently.  The easiest thing to do is to edit config.sh and rerun all the
SH files.  Configure will offer to let you do this before it runs the SH files.

EOH
rp="[Type carriage return to continue]"
echo $n "$rp $c"
. myread

: get old answers, if there is a config file out there
if test -f ../config.sh; then
    echo " "
    dflt=y
    rp="I see a config.sh file.  Did Configure make it on THIS system? [$dflt]"
    echo $n "$rp $c"
    . myread
    case "$ans" in
    n*) echo "OK, I'll ignore it.";;
    *)  echo "Fetching default answers from your old config.sh file..."
        tmp="$n"
        ans="$c"
        . ../config.sh
        n="$tmp"
        c="$ans"
        ;;
    esac
fi

: find out where common programs are
echo " "
echo "Locating common programs..."
cat <<EOSC >loc
$startsh
case \$# in
0) exit 1;;
esac
thing=\$1
shift
dflt=\$1
shift
for dir in \$*; do
    case "\$thing" in
    .)
        if test -d \$dir/\$thing; then
            echo \$dir
            exit 0
        fi
        ;;
    *)
        if test -f \$dir/\$thing; then
            echo \$dir/\$thing
            exit 0
        fi
        ;;
    esac
done
echo \$dflt
exit 1
EOSC
chmod 755 loc
$eunicefix loc
loclist="
expr
sed
echo
cat
rm
mv
cp
tr
mkdir
sort
uniq
grep
"
trylist="
test
egrep
Mcc
"
for file in $loclist; do
    xxx=`loc $file $file $pth`
    eval $file=$xxx
    eval _$file=$xxx
    case "$xxx" in
    /*)
        echo $file is in $xxx.
        ;;
    *)
        echo "I don't know where $file is.  I hope it's in everyone's PATH."
        ;;
    esac
done
echo " "
echo "Don't worry if any of the following aren't found..."
ans=offhand
for file in $trylist; do
    xxx=`loc $file $file $pth`
    eval $file=$xxx
    eval _$file=$xxx
    case "$xxx" in
    /*)
        echo $file is in $xxx.
        ;;
    *)
        echo "I don't see $file out there, $ans."
        ans=either
        ;;
    esac
done
case "$egrep" in
egrep)
    echo "Substituting grep for egrep."
    egrep=$grep
    ;;
esac
case "$test" in
test)
    echo "Hopefully test is built into your sh."
    ;;
/bin/test)
    echo " "
    dflt=n
    rp="Is your "'"'"test"'"'" built into sh? [$dflt] (OK to guess)"
    echo $n "$rp $c"
    . myread
    case "$ans" in
    y*) test=test ;;
    esac
    ;;
*)
    test=test
    ;;
esac
case "$echo" in
echo)
    echo "Hopefully echo is built into your sh."
    ;;
/bin/echo)
    echo " "
    echo "Checking compatibility between /bin/echo and builtin echo (if any)..."
    $echo $n "hi there$c" >foo1
    echo $n "hi there$c" >foo2
    if cmp foo1 foo2 >/dev/null 2>&1; then
        echo "They are compatible.  In fact, they may be identical."
    else
        case "$n" in
        '-n') n='' c='\c' ans='\c' ;;
        *) n='-n' c='' ans='-n' ;;
        esac
        cat <<FOO
They are not compatible!  You are probably running ksh on a non-USG system.
I'll have to use /bin/echo instead of the builtin, since Bourne shell doesn't
have echo built in and we may have to run some Bourne shell scripts.  That
means I'll have to use $ans to suppress newlines now.  Life is ridiculous.

FOO
        rp="Your cursor should be here-->"
        $echo $n "$rp$c"
        . myread
    fi
    $rm -f foo1 foo2
    ;;
*)
    : cross your fingers
    echo=echo
    ;;
esac
rmlist="$rmlist loc"

: get list of predefined functions in a handy place
echo " "
if test -f /lib/libc.a; then
    echo "Your C library is in /lib/libc.a.  You're normal."
    libc=/lib/libc.a
else
    ans=`loc libc.a blurfl/dyick $libpth`
    if test -f $ans; then
        echo "Your C library is in $ans, of all places."
        libc=ans
    else
        if test -f "$libc"; then
            echo "Your C library is in $libc, like you said before."
        else
            cat <<EOM
 
I can't seem to find your C library.  I've looked in the following places:

        $libpth

None of these seems to contain your C library.  What is the full name
EOM
            dflt=None
            $echo $n "of your C library? $c"
            rp='C library full name?'
            . myread
            libc="$ans"
        fi
    fi
fi
echo " "
$echo $n "Extracting names from $libc for later perusal...$c"
if ar t $libc > libc.list; then
    echo "done"
else
    echo " "
    echo "The archiver doesn't think $libc is a reasonable library."
    echo "Trying nm instead..."
    if nm -g $libc > libc.list; then
        echo "Done.  Maybe this is Unicos, or an Apollo?"
    else
        echo "That didn't work either.  Giving up."
        exit 1
    fi
fi
rmlist="$rmlist libc.list"

: make some quick guesses about what we are up against
echo " "
$echo $n "Hmm...  $c"
if $contains SIGTSTP /usr/include/signal.h >/dev/null 2>&1 ; then
    echo "Looks kind of like a BSD system, but we'll see..."
    echo exit 0 >bsd
    echo exit 1 >usg
    echo exit 1 >v7
elif $contains fcntl libc.list >/dev/null 2>&1 ; then
    echo "Looks kind of like a USG system, but we'll see..."
    echo exit 1 >bsd
    echo exit 0 >usg
    echo exit 1 >v7
else
    echo "Looks kind of like a version 7 system, but we'll see..."
    echo exit 1 >bsd
    echo exit 1 >usg
    echo exit 0 >v7
fi
if $contains vmssystem libc.list >/dev/null 2>&1 ; then
    cat <<'EOI'
There is, however, a strange, musty smell in the air that reminds me of
something...hmm...yes...I've got it...there's a VMS nearby, or I'm a Blit.
EOI
    echo "exit 0" >eunice
    eunicefix=unixtovms
    d_eunice="$define"
: it so happens the Eunice I know will not run shell scripts in Unix format
else
    echo " "
    echo "Congratulations.  You aren't running Eunice."
    eunicefix=':'
    d_eunice="$undef"
    echo "exit 1" >eunice
fi
if test -f /xenix; then
    echo "Actually, this looks more like a XENIX system..."
    echo "exit 0" >xenix
else
    echo " "
    echo "It's not Xenix..."
    echo "exit 1" >xenix
fi
chmod 755 xenix
if test -f /venix; then
    echo "Actually, this looks more like a VENIX system..."
    echo "exit 0" >venix
else
    echo " "
    if xenix; then
        : null
    else
        echo "Nor is it Venix..."
    fi
    echo "exit 1" >venix
fi
chmod 755 bsd usg v7 eunice venix xenix
$eunicefix bsd usg v7 eunice venix xenix
rmlist="$rmlist bsd usg v7 eunice venix xenix"

: see if sh knows # comments
echo " "
echo "Checking your sh to see if it knows about # comments..."
if sh -c '#' >/dev/null 2>&1 ; then
    echo "Your sh handles # comments correctly."
    shsharp=true
    spitshell=cat
    echo " "
    echo "Okay, let's see if #! works on this system..."
    echo "#!/bin/echo hi" > try
    $eunicefix try
    chmod 755 try
    try > today
    if test -s today; then
        echo "It does."
        sharpbang='#!'
    else
        echo "#! /bin/echo hi" > try
        $eunicefix try
        chmod 755 try
        try > today
        if test -s today; then
            echo "It does."
            sharpbang='#! '
        else
            echo "It doesn't."
            sharpbang=': use '
        fi
    fi
else
    echo "Your sh doesn't grok # comments--I will strip them later on."
    shsharp=false
    echo "exec grep -v '^#'" >spitshell
    chmod 755 spitshell
    $eunicefix spitshell
    spitshell=`pwd`/spitshell
    echo "I presume that if # doesn't work, #! won't work either!"
    sharpbang=': use '
fi

: figure out how to guarantee sh startup
echo " "
echo "Checking out how to guarantee sh startup..."
startsh=$sharpbang'/bin/sh'
echo "Let's see if '$startsh' works..."
cat >try <<EOSS
$startsh
set abc
test "$?abc" != 1
EOSS

chmod 755 try
$eunicefix try
if try; then
    echo "Yup, it does."
else
    echo "Nope.  You may have to fix up the shell scripts to make sure sh runs them."
fi
rm -f try today

: see if sprintf is declared as int or pointer to char
echo " "
if $contains 'char.*sprintf' /usr/include/stdio.h >/dev/null 2>&1 ; then
    echo "Your sprintf() returns (char*)."
    d_charsprf="$define"
else
    echo "Your sprintf() returns (int)."
    d_charsprf="$undef"
fi

: index or strcpy
echo " "
dflt=y
if $contains index libc.list >/dev/null 2>&1 ; then
    echo "Your system appears to use index() and rindex() rather than strchr()"
    $echo $n "and strrchr().  Is this correct? [$dflt] $c"
    rp='index() rather than strchr()? [$dflt]'
    . myread
    case "$ans" in
        n*|f*) d_index="$define" ;;
        *)     d_index="$undef" ;;
    esac
else
    echo "Your system appears to use strchr() and strrchr() rather than index()"
    $echo $n "and rindex().  Is this correct? [$dflt] $c"
    rp='strchr() rather than index()? [$dflt]'
    . myread
    case "$ans" in
        n*|f*) d_index="$undef" ;;
        *)     d_index="$define" ;;
    esac
fi

: check for structure copying
echo " "
echo "Checking to see if your C compiler can copy structs..."
$cat >try.c <<'EOCP'
main()
{
        struct blurfl {
            int dyick;
        } foo, bar;

        foo = bar;
}
EOCP
if cc -c try.c >/dev/null 2>&1 ; then
    d_strctcpy="$define"
    echo "Yup, it can."
else
    d_strctcpy="$undef"
    echo "Nope, it can't."
fi
$rm -f try.*

: see if there is a vfork
echo " "
if $contains vfork libc.list >/dev/null 2>&1 ; then
    echo "vfork() found."
    d_vfork="$undef"
else
    echo "No vfork() found--will use fork() instead."
    d_vfork="$define"
fi

: check for void type
echo " "
$cat <<EOM
Checking to see how well your C compiler groks the void type...

  Support flag bits are:
    1: basic void declarations.
    2: arrays of pointers to functions returning void.
    4: operations between pointers to and addresses of void functions.

EOM
case "$voidflags" in
'')
    $cat >try.c <<'EOCP'
#if TRY & 1
void main() {
#else
main() {
#endif
        extern void *moo();
        void (*goo)();
#if TRY & 2
        void (*foo[10])();
#endif

#if TRY & 4
        if(goo == moo) {
                exit(0);
        }
#endif
        exit(0);
}
EOCP
    if cc -S -DTRY=7 try.c >.out 2>&1 ; then
        voidflags=7
        echo "It appears to support void fully."
        if $contains warning .out >/dev/null 2>&1; then
            echo "However, you might get some warnings that look like this:"
            $cat .out
        fi
    else
        echo "Hmm, you compiler has some difficulty with void.  Checking further..."
        if cc -S -DTRY=1 try.c >/dev/null 2>&1 ; then
            echo "It supports 1..."
            if cc -S -DTRY=3 try.c >/dev/null 2>&1 ; then
                voidflags=3
                echo "And it supports 2 but not 4."
            else
                echo "It doesn't support 2..."
                if cc -S -DTRY=3 try.c >/dev/null 2>&1 ; then
                    voidflags=5
                    echo "But it supports 4."
                else
                    voidflags=1
                    echo "And it doesn't support 4."
                fi
            fi
        else
            echo "There is no support at all for void."
            voidflags=0
        fi
    fi
esac
dflt="$voidflags";
rp="Your void support flags add up to what? [$dflt]"
$echo $n "$rp $c"
. myread
voidflags="$ans"
$rm -f try.* .out

: preserve RCS keywords in files with variable substitution, grrr
Log='$Log'
Header='$Header'

: set up shell script to do ~ expansion
cat >filexp <<EOSS
$startsh
: expand filename
case "\$1" in
 ~/*|~)
    echo \$1 | $sed "s|~|\${HOME-\$LOGDIR}|"
    ;;
 ~*)
    if $test -f /bin/csh; then
        /bin/csh -f -c "glob \$1"
        echo ""
    else
        name=\`$expr x\$1 : '..\([^/]*\)'\`
        dir=\`$sed -n -e "/^\${name}:/{s/^[^:]*:[^:]*:[^:]*:[^:]*:[^:]*:\([^:]*\).*"'\$'"/\1/" -e p -e q -e '}' </etc/passwd\`
        if $test ! -d "\$dir"; then
            me=\`basename \$0\`
            echo "\$me: can't locate home directory for: \$name" >&2
            exit 1
        fi
        case "\$1" in
        */*)
            echo \$dir/\`$expr x\$1 : '..[^/]*/\(.*\)'\`
            ;;
        *)
            echo \$dir
            ;;
        esac
    fi
    ;;
*)
    echo \$1
    ;;
esac
EOSS
chmod 755 filexp
$eunicefix filexp

: determine where public executables go
case "$bin" in
'')
    dflt=`loc . /bin /usr/local/bin /usr/lbin /usr/local /usr/bin`
    ;;
*)  dflt="$bin"
    ;;
esac
cont=true
while $test "$cont" ; do
    echo " "
    rp="Where do you want to put the public executables? [$dflt]"
    $echo $n "$rp $c"
    . myread
    bin="$ans"
    bin=`filexp $bin`
    if test -d $bin; then
        cont=''
    else
        dflt=n
        rp="Directory $bin doesn't exist.  Use that name anyway? [$dflt]"
        $echo $n "$rp $c"
        . myread
        dflt=''
        case "$ans" in
        y*) cont='';;
        esac
    fi
done

: determine where manual pages go
case "$mansrc" in
'')
    dflt=`loc . /usr/man/man1 /usr/man/mann /usr/man/local/man1 /usr/man/u_man/man1 /usr/man/man1`
    ;;
*)  dflt="$mansrc"
    ;;
esac
cont=true
while $test "$cont" ; do
    echo " "
    rp="Where do the manual pages (source) go? [$dflt]"
    $echo $n "$rp $c"
    . myread
    mansrc=`filexp "$ans"`
    if test -d $mansrc; then
        cont=''
    else
        dflt=n
        rp="Directory $mansrc doesn't exist.  Use that name anyway? [$dflt]"
        $echo $n "$rp $c"
        . myread
        dflt=''
        case "$ans" in
        y*) cont='';;
        esac
    fi
done
case "$mansrc" in
*l)
    manext=l
    ;;
*n)
    manext=n
    ;;
*)
    manext=1
    ;;
esac

: see how we invoke the C preprocessor
echo " "
echo "Checking to see how your C preprocessor is invoked..."
cat <<'EOT' >testcpp.c
#define ABC abc
#define XYZ xyz
ABC.XYZ
EOT
echo 'Maybe "cc -E" will work...'
cc -E testcpp.c >testcpp.out 2>&1
if $contains 'abc.xyz' testcpp.out >/dev/null 2>&1 ; then
    echo "Yup, it does."
    cpp='cc -E'
else
    echo 'Nope...maybe "cc -P" will work...'
    cc -P testcpp.c >testcpp.out 2>&1
    if $contains 'abc.xyz' testcpp.out >/dev/null 2>&1 ; then
        echo "Yup, that does."
        cpp='cc -P'
    else
        echo 'Nixed again...maybe "/lib/cpp" will work...'
        /lib/cpp testcpp.c >testcpp.out 2>&1
        if $contains 'abc.xyz' testcpp.out >/dev/null 2>&1 ; then
            echo "Hooray, it works!  I was beginning to wonder."
            cpp='/lib/cpp'
        else
            echo 'Hmm...maybe you already told me...'
            case "$cpp" in
            '') ;;
            *) $cpp testcpp.c >testcpp.out 2>&1;;
            esac
            if $contains 'abc.xyz' testcpp.out >/dev/null 2>&1 ; then
                echo "Hooray, you did!  I was beginning to wonder."
            else
                dflt=blurfl
                $echo $n "Nope. I can't find a C preprocessor.  Name one: $c"
                rp='Name a C preprocessor:'
                . myread
                cpp="$ans"
                $cpp testcpp.c >testcpp.out 2>&1
                if $contains 'abc.xyz' testcpp.out >/dev/null 2>&1 ; then
                    echo "OK, that will do."
                else
                    echo "Sorry, I can't get that to work.  Go find one."
                    exit 1
                fi
            fi
        fi
    fi
fi
rm -f testcpp.c testcpp.out

: 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\\
/' >/tmp/Cppsym\$\$
echo exit 1 >>/tmp/Cppsym\$\$
$cpp /tmp/Cppsym\$\$ >/tmp/Cppsym2\$\$
case "\$list" in
true) awk '\$6 != "" {print substr(\$6,2,100)}' </tmp/Cppsym2\$\$ ;;
*)
    sh /tmp/Cppsym2\$\$
    status=\$?
    ;;
esac
$rm -f /tmp/Cppsym\$\$ /tmp/Cppsym2\$\$
exit \$status
EOSS
chmod 755 Cppsym
$eunicefix Cppsym
echo "Your C preprocessor defines the following symbols:"
Cppsym -l $attrlist >Cppsym.true
cat Cppsym.true
rmlist="$rmlist Cppsym Cppsym.know Cppsym.true"

: see what memory models we can support
case "$models" in
'')
    if Cppsym pdp11; then
        dflt='unsplit split'
    else
        ans=`loc . X /lib/small /lib/large /usr/lib/small /usr/lib/large /lib/medium /usr/lib/medium /lib/huge`
        case "$ans" in
        X) dflt='none';;
        *)  if $test -d /lib/small || $test -d /usr/lib/small; then
                dflt='small'
            else
                dflt=''
            fi
            if $test -d /lib/medium || $test -d /usr/lib/medium; then
                dflt="$dflt medium"
            fi
            if $test -d /lib/large || $test -d /usr/lib/large; then
                dflt="$dflt large"
            fi
            if $test -d /lib/huge || $test -d /usr/lib/huge; then
                dflt="$dflt huge"
            fi
        esac
    fi
    ;;
*)  dflt="$models" ;;
esac
$cat <<EOM
 
Some systems have different model sizes.  On most systems they are called
small, medium, large, and huge.  On the PDP11 they are called unsplit and
split.  If your system doesn't support different memory models, say "none".
If you wish to force everything to one memory model, say "none" here and
put the appropriate flags later when it asks you for other cc and ld flags.
Venix systems may wish to put "none" and let the compiler figure things out.
(In the following question multiple model names should be space separated.)

EOM
rp="Which models are supported? [$dflt]"
$echo $n "$rp $c"
. myread
models="$ans"

case "$models" in
none)
    small=''
    medium=''
    large=''
    huge=''
    unsplit=''
    split=''
    ;;
*split)
    case "$split" in
    '') 
        if $contains '-i' $mansrc/ld.1 >/dev/null 2>&1 || \
           $contains '-i' $mansrc/cc.1 >/dev/null 2>&1; then
            dflt='-i'
        else
            dflt='none'
        fi
        ;;
    *) dflt="$split";;
    esac
    rp="What flag indicates separate I and D space? [$dflt]"
    $echo $n "$rp $c"
    . myread
    case "$ans" in
    none) ans='';;
    esac
    split="$ans"
    unsplit=''
    ;;
*large*|*small*|*medium*|*huge*)
    case "$model" in
    *large*)
        case "$large" in
        '') dflt='-Ml';;
        *) dflt="$large";;
        esac
        rp="What flag indicates large model? [$dflt]"
        $echo $n "$rp $c"
        . myread
        case "$ans" in
        none) ans='';
        esac
        large="$ans"
        ;;
    *) large='';;
    esac
    case "$model" in
    *huge*)
        case "$huge" in
        '') dflt='-Mh';;
        *) dflt="$huge";;
        esac
        rp="What flag indicates huge model? [$dflt]"
        $echo $n "$rp $c"
        . myread
        case "$ans" in
        none) ans='';
        esac
        huge="$ans"
        ;;
    *) huge="$large";;
    esac
    case "$model" in
    *medium*)
        case "$medium" in
        '') dflt='-Mm';;
        *) dflt="$medium";;
        esac
        rp="What flag indicates medium model? [$dflt]"
        $echo $n "$rp $c"
        . myread
        case "$ans" in
        none) ans='';
        esac
        medium="$ans"
        ;;
    *) medium="$large";;
    esac
    case "$model" in
    *small*)
        case "$small" in
        '') dflt='none';;
        *) dflt="$small";;
        esac
        rp="What flag indicates small model? [$dflt]"
        $echo $n "$rp $c"
        . myread
        case "$ans" in
        none) ans='';
        esac
        small="$ans"
        ;;
    *) small='';;
    esac
    ;;
*)
    echo "Unrecognized memory models--you may have to edit Makefile.SH"
    ;;
esac

case "$ccflags" in
'') dflt='none';;
*) dflt="$ccflags";;
esac
echo " "
rp="Any additional cc flags? [$dflt]"
$echo $n "$rp $c"
. myread
case "$ans" in
none) ans='';
esac
ccflags="$ans"

case "$ldflags" in
'') if venix; then
        dflt='-i -z'
    else
        dflt='none'
    fi
    ;;
*) dflt="$ldflags";;
esac
echo " "
rp="Any additional ld flags? [$dflt]"
$echo $n "$rp $c"
. myread
case "$ans" in
none) ans='';
esac
ldflags="$ans"

: see if we need a special compiler
echo " "
if usg; then
    case "$cc" in
    '')
        case "$Mcc" in
        /*) dflt='Mcc'
            ;;
        *)
            case "$large" in
            -M*)
                dflt='cc'
                ;;
            *)
                if $contains '\-M' $mansrc/cc.1 >/dev/null 2>&1 ; then
                    dflt='cc -M'
                else
                    dflt='cc'
                fi
                ;;
            esac
            ;;
        esac
        ;;
    *)  dflt="$cc";;
    esac
    $cat <<'EOM'
 
On some systems the default C compiler will not resolve multiple global
references that happen to have the same name.  On some such systems the
"Mcc" command may be used to force these to be resolved.  On other systems
a "cc -M" command is required.  (Note that the -M flag on other systems
indicates a memory model to use!)  What command will force resolution on
EOM
    $echo $n "this system? [$dflt] $c"
    rp="Command to resolve multiple refs? [$dflt]"
    . myread
    cc="$ans"
else
    echo "Not a USG system--assuming cc can resolve multiple definitions."
    cc=cc
fi

: see if we should include -lnm
echo " "
if $test -r /usr/lib/libnm.a || $test -r /usr/local/lib/libnm.a ; then
    echo "New math library found."
    libnm='-lnm'
else
    ans=`loc libtermlib.a x $libpth`
    case "$ans" in
    x)
        echo "No nm library found--the normal math library will have to do."
        libnm=''
        ;;
    *)
        echo "New math library found in $ans."
        libnm="$ans"
        ;;
    esac
fi

echo " "
echo "End of configuration questions."
echo " "

: create config.sh file
echo " "
if test -d ../UU; then
    cd ..
fi
echo "Creating config.sh..."
$spitshell <<EOT >config.sh
$startsh
# config.sh
# This file was produced by running the Configure script.

d_eunice='$d_eunice'
eunicefix='$eunicefix'
define='$define'
loclist='$loclist'
expr='$expr'
sed='$sed'
echo='$echo'
cat='$cat'
rm='$rm'
mv='$mv'
cp='$cp'
tail='$tail'
tr='$tr'
mkdir='$mkdir'
sort='$sort'
uniq='$uniq'
grep='$grep'
trylist='$trylist'
test='$test'
inews='$inews'
egrep='$egrep'
more='$more'
pg='$pg'
Mcc='$Mcc'
vi='$vi'
mailx='$mailx'
mail='$mail'
Log='$Log'
Header='$Header'
bin='$bin'
cc='$cc'
contains='$contains'
cpp='$cpp'
d_charsprf='$d_charsprf'
d_index='$d_index'
d_strctcpy='$d_strctcpy'
d_vfork='$d_vfork'
libc='$libc'
libnm='$libnm'
mansrc='$mansrc'
manext='$manext'
models='$models'
split='$split'
small='$small'
medium='$medium'
large='$large'
huge='$huge'
ccflags='$ccflags'
ldflags='$ldflags'
n='$n'
c='$c'
package='$package'
spitshell='$spitshell'
shsharp='$shsharp'
sharpbang='$sharpbang'
startsh='$startsh'
voidflags='$voidflags'
defvoidused='$defvoidused'
CONFIG=true
EOT
 
CONFIG=true

echo " "
dflt=''
echo "If you didn't make any mistakes, then just type a carriage return here."
rp="If you need to edit config.sh, do it as a shell escape here:"
$echo $n "$rp $c"
. UU/myread
case "$ans" in
'') ;;
*) : in case they cannot read
    eval $ans;;
esac

echo " "
echo "Doing variable substitutions on .SH files..."
set `$grep '\.SH' <MANIFEST | awk '{print $1}'`
for file in $*; do
    case "$file" in
    */*)
        dir=`$expr X$file : 'X\(.*\)/'`
        file=`$expr X$file : 'X.*/\(.*\)'`
        (cd $dir && . $file)
        ;;
    *)
        . $file
        ;;
    esac
done
if test -f config.h.SH; then
    if test ! -f config.h; then
        : oops, they left it out of MANIFEST, probably, so do it anyway.
        . config.h.SH
    fi
fi

if $contains '^depend:' Makefile >/dev/null 2>&1; then
    dflt=n
    $cat <<EOM

Now you need to generate make dependencies by running "make depend".
You might prefer to run it in background: "make depend > makedepend.out &"
It can take a while, so you might not want to run it right now.

EOM
    rp="Run make depend now? [$dflt]"
    $echo $n "$rp $c"
    . UU/myread
    case "$ans" in
    y*) make depend
        echo "Now you must run a make."
        ;;
    *)  echo "You must run 'make depend' then 'make'."
        ;;
    esac
elif test -f Makefile; then
    echo " "
    echo "Now you must run a make."
else
    echo "Done."
fi

$rm -f kit*isdone
cd UU && $rm -f $rmlist
: end of Configure