#! /bin/sh

#*********************************************************************#
#                                                                     #
#                           Objective Caml                            #
#                                                                     #
#            Xavier Leroy, projet Cristal, INRIA Rocquencourt         #
#                                                                     #
#  Copyright 1995 Institut National de Recherche en Informatique et   #
#  Automatique.  Distributed only by permission.                      #
#                                                                     #
#*********************************************************************#

# $Id$

bindir=/usr/local/bin
libdir=/usr/local/lib/ocaml
mandir=/usr/local/man/man1
manext=1
host_type=unknown
cc=''
cclibs=''
x11_include_dir=''
x11_lib_dir=''

# Parse command-line arguments

while : ; do
  case "$1" in
    "") break;;
    -bindir|--bindir) bindir=$2;;
    -libdir|--libdir) libdir=$2;;
    -mandir|--mandir) mandir=$2
                      manext=`echo $mandir | sed -e 's/^.*\(.\)$/\1/'`;;
    -host*|--host*) host_type=$2;;
    -cc*) cc="$2";;
    -lib*) cclibs="$2 ";;
    -x11include*|--x11include*) x11_include_dir=$2;;
    -x11lib*|--x11lib*) x11_lib_dir=$2;;
    *) echo "Unknown option \"$1\"." 1>&2; exit 2;;
  esac
  shift
  shift
done

# Generate the files

cd config/auto-aux
rm -f s.h m.h Makefile
touch s.h m.h Makefile

# Where to install

echo "BINDIR=$bindir" >> Makefile
echo "LIBDIR=$libdir" >> Makefile
echo "MANDIR=$mandir" >> Makefile
echo "MANEXT=$manext" >> Makefile

# Determine the system type

if test "$host_type" = "unknown"; then
  if host_type=`./config.guess`; then :; else
    echo "Cannot guess host type"
    echo "You must specify one with the -host option"
    exit 2
  fi
fi
if host=`./config.sub $host_type`; then :; else
  echo "Please specify the correct host type with the -host option"
  exit 2
fi
echo "Configuring for a $host ..."

# Do we have gcc?

if test -z "$cc"; then
  if sh ./searchpath gcc; then
    echo "gcc found"
    cc=gcc
  else
    cc=cc
  fi
fi

# Check for buggy versions of GCC

case "$cc" in
  gcc*)
    case `$cc --version` in
      2.7.2.1)
        echo ""
        echo "WARNING: you are using gcc version 2.7.2.1."
        echo "This version of gcc is known to generate incorrect code"
        echo "for the Objective Caml runtime system, at least on some"
        echo "Intel x86 machines. (The symptom is a crash of boot/ocamlc when"
        echo "compiling stdlib/pervasives.mli.)"
        echo "You are strongly advised to use another version of gcc, such as"
        echo "2.7.2 or 2.7.2.2, which are known to work well with Objective Caml."
        echo ""
        echo "Press <enter> to proceed or <interrupt> to stop."
        read reply;;
    esac;;
esac

# Configure the bytecode compiler

bytecc="$cc"
bytecccompopts=""
bytecclinkopts=""

case "$bytecc,$host" in
  cc,*-*-nextstep*)
    # GNU C extensions disabled, but __GNUC__ still defined!
    bytecccompopts="-fno-defer-pop -Wall -U__GNUC__ -posix"
    bytecclinkopts="-posix";;
  gcc,alpha-*-osf*)
    bytecccompopts="-fno-defer-pop -Wall"
    # -taso puts code in lower 4GB
    bytecclinkopts="-Xlinker -taso";;
  gcc*)
    bytecccompopts="-fno-defer-pop -Wall";;
  cc,mips-*-irix6*)
    # Add -32 flag to ensure compatibility with native-code compiler
    bytecccompopts="-32"
    # Turn off warning "unused library"
    bytecclinkopts="-32 -Wl,-woff,84";;
  cc*,mips-*-irix6*)
    # Turn off warning "unused library"
    bytecclinkopts="-Wl,-woff,84";;
esac

echo "BYTECC=$bytecc" >> Makefile
echo "BYTECCCOMPOPTS=$bytecccompopts" >> Makefile
echo "BYTECCLINKOPTS=$bytecclinkopts" >> Makefile

# Configure compiler to use in further tests

cc="$bytecc $bytecclinkopts"
export cc cclibs

# Check the sizes of data types

echo "Checking the sizes of integers and pointers..."
set `sh ./runtest sizes.c`
case "$1,$2,$3" in
  4,4,4) echo "OK, this is a regular 32 bit architecture."
         echo "#undef ARCH_SIXTYFOUR" >> m.h;;
  4,8,8) echo "Wow! A 64 bit architecture!"
         echo "#define ARCH_SIXTYFOUR" >> m.h
         case "$bytecc,$host" in
           gcc,alpha-*-osf*) echo "#define ARCH_CODE32" >> m.h;;
           *)                echo "#undef ARCH_CODE32" >> m.h;;
         esac;;
  8,*,*) echo "Wow! A 64 bit architecture!"
         echo "Unfortunately, Objective Caml does not handle the case"
         echo "sizeof(int) = 8."
         echo "Objective Caml won't run on this architecture."
         exit 2;;
  *,*,8) echo "Wow! A 64 bit architecture!"
         echo "Unfortunately, Objective Caml cannot work in the case"
         echo "sizeof(long) != sizeof(long *)."
         echo "Objective Caml won't run on this architecture."
         exit 2;;
  *,*,*) echo "This architecture seems to be neither 32 bits nor 64 bits."
         echo "Objective Caml won't run on this architecture."
         exit 2;;
      *) echo "Unable to compile the test program."
         echo "Make sure the C compiler $cc is properly installed."
         exit 2;;
esac

# Determine endianness

sh ./runtest endian.c
case $? in
  0) echo "This is a big-endian architecture."
     echo "#define ARCH_BIG_ENDIAN" >> m.h;;
  1) echo "This is a little-endian architecture."
     echo "#undef ARCH_BIG_ENDIAN" >> m.h;;
  2) echo "This architecture seems to be neither big endian nor little endian."
     echo "Objective Caml won't run on this architecture."
     exit 2;;
  *) echo "Something went wrong during endianness determination."
     echo "You'll have to figure out endianness yourself"
     echo "(option ARCH_BIG_ENDIAN in m.h).";;
esac

# Determine alignment constraints

sh ./runtest dblalign.c
case $? in
  0) echo "Doubles can be word-aligned."
     echo "#undef ARCH_ALIGN_DOUBLE" >> m.h;;
  1) echo "Doubles must be doubleword-aligned."
     echo "#define ARCH_ALIGN_DOUBLE" >> m.h;;
  *) echo "Something went wrong during alignment determination for doubles."
     echo "I'm going to assume this architecture has alignment constraints over doubles."
     echo "That's a safe bet: Objective Caml will work even if"
     echo "this architecture has actually no alignment constraints."
     echo "#define ARCH_ALIGN_DOUBLE" >> m.h;;
esac

# Configure the native-code compiler

arch=none
model=default
system=unknown

case "$host" in
  alpha-*-osf*)                 arch=alpha;;
  sparc-*-sunos4.*)             arch=sparc; system=sunos;;
  sparc-*-solaris2.*)           arch=sparc; system=solaris;;
  sparc-*-*bsd*)                arch=sparc; system=bsd;;
  i[3456]86-*-linuxaout)        arch=i386; system=linux_aout;;
  i[3456]86-*-linuxoldld)       arch=i386; system=linux_aout;;
  i[3456]86-*-linux)            arch=i386; system=linux_elf;;
  i[3456]86-*-*bsd*)            arch=i386; system=bsd;;
  i[3456]86-*-nextstep*)        arch=i386; system=nextstep;;
  i[3456]86-*-solaris*)         arch=i386; system=solaris;;
  mips-*-irix6*)                arch=mips; system=irix;;
  mips-*-ultrix*)               arch=mips; system=ultrix;;
  hppa1.1-*-hpux*)              arch=hppa; system=hpux;;
  hppa1.1-*-nextstep*)          arch=hppa; system=nextstep;;
  rs6000-*-aix*)                arch=power; model=rs6000; system=aix;;
  powerpc-*-aix*)               arch=power; model=ppc; system=aix;;
  powerpc-*-linux*)             arch=power; model=ppc; system=elf;;
  m68k-*-sunos*)                arch=m68k; system=sunos;;
esac

case "$arch" in
  alpha|mips) nativecc=cc;;
  *) nativecc="$bytecc";;
esac

nativecccompopts=''
nativecclinkopts=''

case "$arch,$nativecc,$system" in
  alpha,cc,*)     nativecccompopts=-std1;;
  mips,cc,irix)   nativecccompopts=-32
                  nativecclinkopts="-32 -Wl,-woff,84";;
  mips,cc,ultrix) nativecccompopts=-std;;
  *,*,nextstep)   nativecccompopts="-Wall -U__GNUC__ -posix"
                  nativecclinkopts="-posix";;
  *,gcc,*)        nativecccompopts=-Wall;;
esac

asflags=''
aspp='$(AS)'
asppflags=''

case "$arch,$model,$system" in
  alpha,*,*)        asflags='-O2'; asppflags="$asflags";;
  mips,*,irix)      asflags='-32 -O2'; asppflags="$asflags";;
  mips,*,ultrix)    asflags='-O2'; asppflags="$asflags";;
  sparc,*,bsd)      aspp='gcc'; asppflags='-c -DSYS_$(SYSTEM)';;
  sparc,*,*)        asppflags='-P -DSYS_$(SYSTEM)';;
  i386,*,solaris)   asppflags='-P -DSYS_$(SYSTEM)';;
  i386,*,*)         aspp='gcc'; asppflags='-c -DSYS_$(SYSTEM)';;
  hppa,*,*)         aspp="$cc"; asppflags='-c -DSYS_$(SYSTEM)';;
  power,rs6000,aix) asflags='-u -m pwr -w'; asppflags="$asflags";;
  power,ppc,aix)    asflags='-u -m ppc -w'; asppflags="$asflags";;
  power,*,elf)      aspp='gcc'; asppflags='-c';;
esac

echo "ARCH=$arch" >> Makefile
echo "MODEL=$model" >> Makefile
echo "SYSTEM=$system" >> Makefile
echo "NATIVECC=$nativecc" >> Makefile
echo "NATIVECCCOMPOPTS=$nativecccompopts" >> Makefile
echo "NATIVECCLINKOPTS=$nativecclinkopts" >> Makefile
echo "ASFLAGS=$asflags" >> Makefile
echo "ASPP=$aspp" >> Makefile
echo "ASPPFLAGS=$asppflags" >> Makefile

# Where is ranlib?

if sh ./searchpath ranlib; then
  echo "ranlib found"
  echo "RANLIB=ranlib" >> Makefile
  echo "RANLIBCMD=ranlib" >> Makefile
else
  echo "ranlib not used"
  echo "RANLIB=ar rs" >> Makefile
  echo "RANLIBCMD=" >> Makefile
fi

# Do #! scripts work?

if (SHELL=/bin/sh; export SHELL; ./sharpbang > /dev/null); then
  echo "#! appears to work in shell scripts"
  if test `echo $bindir/ocamlrun | wc -c` -gt 32; then
    echo "We won't use it, though, because the path"
    echo "      $bindir/ocamlrun"
    echo "is too long (more than 32 characters -- some kernels don't support this)"
    echo "SHARPBANGSCRIPTS=false" >> Makefile
  else
    echo "SHARPBANGSCRIPTS=true" >> Makefile
  fi
else
  echo "No support for #! in shell scripts"
  echo "SHARPBANGSCRIPTS=false" >> Makefile
fi

# This is obviously a Unix system

echo '#define OCAML_OS_TYPE "Unix"' >> s.h

# Find a good byte move function

if sh ./runtest -Dcopy=memmove -Dreverse bytecopy.c; then
  echo "Function \"memmove\" is provided and handles overlapping moves correctly."
  echo "#define HAS_MEMMOVE" >> s.h
fi
if sh ./runtest -Dcopy=bcopy bytecopy.c; then
  echo "Function \"bcopy\" is provided and handles overlapping moves correctly."
  echo "#define HAS_BCOPY" >> s.h
fi

# Check the semantics of signal handlers

if sh ./hasgot sigaction sigprocmask; then
  echo "POSIX signal handling found."
  echo "#define POSIX_SIGNALS" >> s.h
else
  if sh ./runtest signals.c; then
    echo "Signals have the BSD semantics."
    echo "#define BSD_SIGNALS" >> s.h
  else
    echo "Signals have the System V semantics."
  fi
  if sh ./hasgot sigsetmask; then
    echo "sigsetmask() found"
    echo "#define HAS_SIGSETMASK" >> s.h
  fi
fi

# For the sys module

if sh ./hasgot strerror; then
  echo "strerror() found."
  echo "#define HAS_STRERROR" >> s.h
fi

# For the terminfo module

for libs in "" "-lcurses" "-ltermcap" "-lcurses -ltermcap"; do
  if sh ./hasgot $libs tgetent tgetstr tgetnum tputs; then
    echo "termcap functions found (with libraries '$libs')"
    echo "#define HAS_TERMCAP" >> s.h
    cclibs="${cclibs}${libs}"
    break
  fi
done

# Configuration for the libraries

otherlibraries="unix str num dynlink"

# For the Unix library

has_sockets=no
if sh ./hasgot socket socketpair bind listen accept connect; then
  echo "You have BSD sockets."
  echo "#define HAS_SOCKETS" >> s.h
  has_sockets=yes
elif sh ./hasgot -lnsl -lsocket socket socketpair bind listen accept connect; then
  echo "You have BSD sockets (with the additional libraries -lnsl -lsocket)"
  cclibs="$cclibs -lnsl -lsocket"
  echo "#define HAS_SOCKETS" >> s.h
  has_sockets=yes
fi

if sh ./hasgot -i unistd.h; then
  echo "unistd.h found."
  echo "#define HAS_UNISTD" >> s.h
fi

if sh ./hasgot -i dirent.h; then
  echo "dirent.h found."
  echo "#define HAS_DIRENT" >> s.h
fi

if sh ./hasgot rewinddir; then
  echo "rewinddir() found."
  echo "#define HAS_REWINDDIR" >> s.h
fi

if sh ./hasgot lockf; then
  echo "lockf() found."
  echo "#define HAS_LOCKF" >> s.h
fi

if sh ./hasgot mkfifo; then
  echo "mkfifo() found."
  echo "#define HAS_MKFIFO" >> s.h
fi

if sh ./hasgot getcwd; then
  echo "getcwd() found."
  echo "#define HAS_GETCWD" >> s.h
fi

if sh ./hasgot getwd; then
  echo "getwd() found."
  echo "#define HAS_GETWD" >> s.h
fi

if sh ./hasgot getpriority setpriority; then
  echo "getpriority() found."
  echo "#define HAS_GETPRIORITY" >> s.h
fi

if sh ./hasgot -i utime.h && sh ./hasgot utime; then
  echo "utime() found."
  echo "#define HAS_UTIME" >> s.h
fi

if sh ./hasgot utimes; then
  echo "utimes() found."
  echo "#define HAS_UTIMES" >> s.h
fi

if sh ./hasgot dup2; then
  echo "dup2() found."
  echo "#define HAS_DUP2" >> s.h
fi

if sh ./hasgot fchmod fchown; then
  echo "fchmod() found."
  echo "#define HAS_FCHMOD" >> s.h
fi

if sh ./hasgot truncate ftruncate; then
  echo "truncate() found."
  echo "#define HAS_TRUNCATE" >> s.h
fi

has_select=no
if sh ./hasgot select; then
  echo "select() found."
  echo "#define HAS_SELECT" >> s.h
  has_select=yes
fi

if sh ./hasgot -i sys/select.h; then
  echo "sys/select.h found."
  echo "#define HAS_SYS_SELECT_H" >> s.h
fi

if sh ./hasgot symlink readlink lstat;  then
  echo "symlink() found."
  echo "#define HAS_SYMLINK" >> s.h
fi

has_wait=no
if sh ./hasgot waitpid;  then
  echo "waitpid() found."
  echo "#define HAS_WAITPID" >> s.h
  has_wait=yes
fi

if sh ./hasgot wait4;  then
  echo "wait4() found."
  echo "#define HAS_WAIT4" >> s.h
  has_wait=yes
fi

if sh ./hasgot -i sys/param.h && sh ./runtest getgroups.c; then
  echo "getgroups() found."
  echo "#define HAS_GETGROUPS" >> s.h
fi

if sh ./hasgot -i termios.h && 
   sh ./hasgot tcgetattr tcsetattr tcsendbreak tcflush tcflow; then
  echo "POSIX termios found."
  echo "#define HAS_TERMIOS" >> s.h
fi

# Async I/O under OSF1 3.x are so buggy that the test program hangs...
testasyncio=true
if test -f /usr/bin/uname; then
  case "`/usr/bin/uname -s -r`" in
    "OSF1 V3."*) testasyncio=false;;
  esac
fi
if $testasyncio && sh ./runtest async_io.c; then
  echo "Asynchronous I/O are supported."
  echo "#define HAS_ASYNC_IO" >> s.h
fi

has_setitimer=no
if sh ./hasgot setitimer; then
  echo "setitimer() found."
  echo "#define HAS_SETITIMER" >> s.h
  has_setitimer="yes"
fi

if sh ./hasgot gethostname; then
  echo "gethostname() found."
  echo "#define HAS_GETHOSTNAME" >> s.h
fi

if sh ./hasgot -i sys/utsname.h && sh ./hasgot uname; then
  echo "uname() found."
  echo "#define HAS_UNAME" >> s.h
fi

has_gettimeofday=no
if sh ./hasgot gettimeofday; then
  echo "gettimeofday() found."
  echo "#define HAS_GETTIMEOFDAY" >> s.h
  has_gettimeofday="yes"
fi

if sh ./hasgot mktime; then
  echo "mktime() found."
  echo "#define HAS_MKTIME" >> s.h
fi

if sh ./hasgot setsid; then
  echo "setsid() found."
  echo "#define HAS_SETSID" >> s.h
fi

# Determine if the debugger is supported

if test "$has_sockets" = "yes"; then
  echo "Replay debugger supported."
  debugger="ocamldebugger"
else
  echo "No replay debugger (missing system calls)"
  debugger=""
fi

# Determine the target architecture for the "num" library

case "$host" in
  mips-*-ultrix*) bignum_arch=mips;;
  alpha*) bignum_arch=alpha;;
  i960*) bignum_arch=i960;;
  sparc-*-sunos*) bignum_arch=supersparc;;
  sparc-*-solaris*) bignum_arch=supersparc-solaris;;
  sparc-*-*bsd*) bignum_arch=sparc;;
  m68k-*-sunos*) bignum_arch=68K;;
  *) bignum_arch=C
esac

echo "BIGNUM_ARCH=$bignum_arch" >> Makefile

# Determine if the threads library is supported

if test "$has_select" = "yes" \
&& test "$has_setitimer" = "yes" \
&& test "$has_gettimeofday" = "yes" \
&& test "$has_wait" = "yes"; then
  echo "Threads library supported."
  otherlibraries="$otherlibraries threads"
else
  echo "No threads library (missing system calls)"
fi

# Determine the location of X include files and libraries

x11_include="not found"
x11_link="not found"

for dir in $x11_include_dir \
  /usr/X11R6/include /usr/X11R5/include /usr/X11R4/include \
  /usr/include/X11R6 /usr/include/X11R5 /usr/include/X11R4 \
  /usr/local/X11R6/include /usr/local/X11R5/include /usr/local/X11R4/include \
  /usr/local/include/X11R6 /usr/local/include/X11R5 /usr/local/include/X11R4 \
  /usr/X11/include /usr/include/X11 /usr/local/X11/include \
  /usr/local/include/X11 /usr/X386/include /usr/x386/include \
  /usr/XFree86/include/X11 /usr/include /usr/local/include \
  /usr/unsupported/include /usr/athena/include /usr/local/x11r5/include \
  /usr/lpp/Xamples/include /usr/openwin/include /usr/openwin/share/include \
  /opt/X11R6/include /opt/X11R5/include
do
  if test -f $dir/X11/X.h; then
    x11_include=$dir
    break
  fi
done

for dir in $x11_lib_dir \
  /usr/X11R6/lib /usr/X11R5/lib /usr/X11R4/lib \
  /usr/lib/X11R6 /usr/lib/X11R5 /usr/lib/X11R4 \
  /usr/local/X11R6/lib /usr/local/X11R5/lib /usr/local/X11R4/lib \
  /usr/local/lib/X11R6 /usr/local/lib/X11R5 /usr/local/lib/X11R4 \
  /usr/X11/lib /usr/lib/X11 /usr/local/X11/lib \
  /usr/local/lib/X11 /usr/X386/lib /usr/x386/lib \
  /usr/XFree86/lib/X11 /usr/lib /usr/local/lib \
  /usr/unsupported/lib /usr/athena/lib /usr/local/x11r5/lib \
  /usr/lpp/Xamples/lib /usr/openwin/lib /usr/openwin/share/lib \
  /opt/X11R6/lib /opt/X11R5/lib
do
  if test -f $dir/libX11.a || \
     test -f $dir/libX11.so || \
     test -f $dir/libX11.sa; then
    x11_link="-cclib -L$dir -cclib -lX11"
    break
  fi
done


if test "$x11_include" = "not found" || test "$x11_link" = "not found"
then
  echo "X11 not found, the \"graph\" library will not be supported."
else
  echo "Location of X11 include files: $x11_include/X11"
  echo "Options for linking with X11: $x11_link"
  otherlibraries="$otherlibraries graph"
  if test "$x11_include" = "/usr/include"; then
    x11_include=""
  else
    x11_include="-I$x11_include"
  fi
  echo "X11_INCLUDES=$x11_include" >> Makefile
  echo "X11_LINK=$x11_link" >> Makefile
fi

# See if we can compile the dbm library

if sh ./hasgot -i ndbm.h
then
  echo "NDBM library found."
  otherlibraries="$otherlibraries dbm"
else
  echo "NDBM not found, the \"dbm\" library will not be supported."
fi

# Finish generated files

cclibs="$cclibs -lm"
echo "CCLIBS=$cclibs" >> Makefile
echo "OTHERLIBRARIES=$otherlibraries" >> Makefile
echo "DEBUGGER=$debugger" >> Makefile

rm -f tst hasgot.c
rm -f ../m.h ../s.h ../Makefile
mv m.h s.h Makefile ..

# Print a summary

echo
echo "** Configuration summary **"
echo
echo "Directories where Objective Caml will be installed:"
echo "	binaries.................. $bindir"
echo "	standard library.......... $libdir"
echo "	manual pages.............. $mandir (with extension .$manext)"

echo "Configuration for the bytecode compiler:"
echo "	C compiler used........... $bytecc"
echo "	options for compiling..... $bytecccompopts"
echo "	options for linking....... $bytecclinkopts $cclibs"

echo "Configuration for the native-code compiler:"
if test "$arch" = "none"; then
  echo "	(not supported on this platform)"
else
  if test "$model" = "default"; then
    echo "	hardware architecture..... $arch"
  else
    echo "	hardware architecture..... $arch ($model)"
  fi
  if test "$system" = "unknown"; then : ; else
  echo "	OS variant................ $system"
  fi
  echo "	C compiler used........... $nativecc"
  echo "	options for compiling..... $nativecccompopts"
  echo "	options for linking....... $nativecclinkopts $cclibs"
  echo "        assembler ................ \$(AS) $asflags"
  echo "        preprocessed assembler ... $aspp $asppflags"
fi

if test "$debugger" = "ocamldebugger"; then
  echo "Source-level replay debugger: supported"
else
  echo "Source-level replay debugger: not supported"
fi

echo "Configuration for the external libraries:"
echo "	libraries supported....... $otherlibraries"

echo "The \"num\" library:"
echo "	target architecture ...... $bignum_arch"

if test "$x11_include" != "not found" && test "$x11_lib" != "not found"; then
echo "The \"graph\" library:"
echo "	options for compiling .... $x11_include"
echo "	options for linking ...... $x11_link"
fi