configure

#! /bin/sh

#########################################################################
#                                                                       #
#                                 OCaml                                 #
#                                                                       #
#            Xavier Leroy, projet Cristal, INRIA Rocquencourt           #
#                                                                       #
#   Copyright 1999 Institut National de Recherche en Informatique et    #
#   en Automatique.  All rights reserved.  This file is distributed     #
#   under the terms of the GNU Library General Public License, with     #
#   the special exception on linking described in file LICENSE.         #
#                                                                       #
#########################################################################

# $Id$

configure_options="$*"
prefix=/usr/local
bindir=''
libdir=''
mandir=''
manext=1
host_type=unknown
ccoption=''
asoption=''
asppoption=''
cclibs=''
curseslibs=''
mathlib='-lm'
dllib=''
x11_include_dir=''
x11_lib_dir=''
graph_wanted=yes
tk_wanted=yes
pthread_wanted=yes
tk_defs=''
tk_libs=''
tk_x11=yes
dl_defs=''
verbose=no
withcurses=yes
debugruntime=noruntimed
withsharedlibs=yes
gcc_warnings="-Wall"
partialld="ld -r"
withcamlp4=camlp4

# Try to turn internationalization off, can cause config.guess to malfunction!
unset LANG
unset LC_ALL LC_CTYPE LC_COLLATE LC_MESSAGES LC_MONETARY LC_NUMERIC LC_TIME

# Turn off some MacOS X debugging stuff, same reason
unset RC_TRACE_ARCHIVES RC_TRACE_DYLIBS RC_TRACE_PREBINDING_DISABLED

# Parse command-line arguments

while : ; do
  case "$1" in
    "") break;;
    -prefix|--prefix)
        prefix=$2; shift;;
    -bindir|--bindir)
        bindir=$2; shift;;
    -libdir|--libdir)
        libdir=$2; shift;;
    -mandir|--mandir)
        case "$2" in
          */man[1-9ln])
            mandir=`echo $2 | sed -e 's|^\(.*\)/man.$|\1|'`
            manext=`echo $2 | sed -e 's/^.*\(.\)$/\1/'`;;
          *)
            mandir=$2
            manext=1;;
        esac
        shift;;
    -host*|--host*)
        host_type=$2; shift;;
    -cc*)
        ccoption="$2"; shift;;
    -as)
        asoption="$2"; shift;;
    -aspp)
        asppoption="$2"; shift;;
    -lib*)
        cclibs="$2 $cclibs"; shift;;
    -no-curses|--no-curses)
        withcurses=no;;
    -no-shared-libs|--no-shared-libs)
        withsharedlibs=no;;
    -x11include*|--x11include*)
        x11_include_dir=$2; shift;;
    -x11lib*|--x11lib*)
        x11_lib_dir=$2; shift;;
    -no-graph|--no-graph) graph_wanted=no;;
    -with-pthread*|--with-pthread*)
        ;; # Ignored for backward compatibility
    -no-pthread*|--no-pthread*)
        pthread_wanted=no;;
    -no-tk|--no-tk)
        tk_wanted=no;;
    -partialld|--partialld)
        partialld="$2"; shift;;
    -tkdefs*|--tkdefs*)
        tk_defs=$2; shift;;
    -tklibs*|--tklibs*)
        tk_libs=$2; shift;;
    -tk-no-x11|--tk-no-x11)
        tk_x11=no;;
    -dldefs*|--dldefs*)
        dl_defs="$2"; shift;;
    -dllibs*|--dllibs*)
        dllib="$2"; shift;;
    -verbose|--verbose)
        verbose=yes;;
    -with-debug-runtime|--with-debug-runtime)
        debugruntime=runtimed;;
    -no-camlp4|--no-camlp4)
        withcamlp4="";;
    *) echo "Unknown option \"$1\"." 1>&2; exit 2;;
  esac
  shift
done

# Sanity checks

case "$prefix" in
  /*) ;;
   *) echo "The -prefix directory must be absolute." 1>&2; exit 2;;
esac
case "$bindir" in
  /*) ;;
  "") ;;
  '$(PREFIX)/'*) ;;
   *) echo 'The -bindir directory must be absolute or relative to $(PREFIX).'>&2
      exit 2;;
esac
case "$libdir" in
  /*) ;;
  "") ;;
  '$(PREFIX)/'*) ;;
   *) echo 'The -libdir directory must be absolute or relative to $(PREFIX).'>&2
      exit 2;;
esac
case "$mandir" in
  /*) ;;
  "") ;;
  '$(PREFIX)/'*) ;;
   *) echo 'The -mandir directory must be absolute or relative to $(PREFIX).'>&2
      exit 2;;
esac

# Generate the files

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

# Write options to Makefile

echo "# generated by ./configure $configure_options" >> Makefile

# Where to install

echo "PREFIX=$prefix" >> Makefile
case "$bindir" in
  "") echo 'BINDIR=$(PREFIX)/bin' >> Makefile
      bindir="$prefix/bin";;
   *) echo "BINDIR=$bindir" >> Makefile;;
esac
case "$libdir" in
  "") echo 'LIBDIR=$(PREFIX)/lib/ocaml' >> Makefile
      libdir="$prefix/lib/ocaml";;
   *) echo "LIBDIR=$libdir" >> Makefile;;
esac
echo 'STUBLIBDIR=$(LIBDIR)/stublibs' >> Makefile
case "$mandir" in
  "") echo 'MANDIR=$(PREFIX)/man' >> Makefile
      mandir="$prefix/man";;
   *) echo "MANDIR=$mandir" >> Makefile;;
esac
echo "MANEXT=$manext" >> Makefile

# Determine the system type

if test "$host_type" = "unknown"; then
  if host_type=`../gnu/config.guess`; then :; else
    echo "Cannot guess host type"
    echo "You must specify one with the -host option"
    exit 2
  fi
fi
if host=`../gnu/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 "$ccoption"; then
  if sh ./searchpath gcc; then
    echo "gcc found"
    cc=gcc
  else
    cc=cc
  fi
else
  cc="$ccoption"
fi

# Check for buggy versions of GCC

buggycc="no"

case "$host,$cc" in
  i[3456]86-*-*,gcc*)
    case `$cc --version` in
      2.7.2.1) cat <<'EOF'

WARNING: you are using gcc version 2.7.2.1 on an Intel x86 processor.
This version of gcc is known to generate incorrect code for the
OCaml runtime system on some Intel x86 machines. (The symptom
is a crash of boot/ocamlc when compiling stdlib/pervasives.mli.)
In particular, the version of gcc 2.7.2.1 that comes with
Linux RedHat 4.x / Intel is affected by this problem.
Other Linux distributions might also be affected.
If you are using one of these configurations, you are strongly advised
to use another version of gcc, such as 2.95, which are
known to work well with OCaml.

Press <enter> to proceed or <interrupt> to stop.
EOF
        read reply;;
      2.96*) cat <<'EOF'

WARNING: you are using gcc version 2.96 on an Intel x86 processor.
Certain patched versions of gcc 2.96 are known to generate incorrect
code for the OCaml runtime system.  (The symptom is a segmentation
violation on boot/ocamlc.)  Those incorrectly patched versions can be found
in RedHat 7.2 and Mandrake 8.0 and 8.1; other Linux distributions
might also be affected.  (See bug #57760 on bugzilla.redhat.com)

Auto-configuration will now select gcc compiler flags that work around
the problem.  Still, if you observe segmentation faults while running
ocamlc or ocamlopt, you are advised to try another version of gcc,
such as 2.95.3 or 3.2.

EOF
        buggycc="gcc.2.96";;

            esac;;
esac

# Configure the bytecode compiler

bytecc="$cc"
mkexe="\$(BYTECC)"
bytecccompopts=""
bytecclinkopts=""
dllccompopts=""
ostype="Unix"
exe=""
iflexdir=""

case "$bytecc,$host" in
  cc,*-*-nextstep*)
    # GNU C extensions disabled, but __GNUC__ still defined!
    bytecccompopts="-fno-defer-pop $gcc_warnings -U__GNUC__ -posix"
    bytecclinkopts="-posix";;
  *,*-*-rhapsody*)
    # Almost the same as NeXTStep
    bytecccompopts="-fno-defer-pop $gcc_warnings -DSHRINKED_GNUC"
    mathlib="";;
  *,*-*-darwin*)
    bytecccompopts="-fno-defer-pop $gcc_warnings"
    mathlib=""
    # Tell gcc that we can use 32-bit code addresses for threaded code
    # unless we are compiled for a shared library (-fPIC option)
    echo "#ifndef __PIC__" >> m.h
    echo "#  define ARCH_CODE32" >> m.h
    echo "#endif" >> m.h;;
  *,*-*-beos*)
    bytecccompopts="-fno-defer-pop $gcc_warnings"
    # No -lm library
    mathlib="";;
  gcc,alpha*-*-osf*)
    bytecccompopts="-fno-defer-pop $gcc_warnings"
    if cc="$bytecc" sh ./hasgot -mieee; then
      bytecccompopts="-mieee $bytecccompopts";
    fi
    # Put code and static data in lower 4GB
    bytecclinkopts="-Wl,-T,12000000 -Wl,-D,14000000"
    # Tell gcc that we can use 32-bit code addresses for threaded code
    echo "#define ARCH_CODE32" >> m.h;;
  cc,alpha*-*-osf*)
    bytecccompopts="-std1 -ieee";;
  gcc,alpha*-*-linux*)
    if cc="$bytecc" sh ./hasgot -mieee; then
      bytecccompopts="-mieee $bytecccompopts";
    fi;;
  cc,mips-*-irix6*)
    # Add -n32 flag to ensure compatibility with native-code compiler
    bytecccompopts="-n32"
    # Turn off warning "unused library"
    bytecclinkopts="-n32 -Wl,-woff,84";;
  cc*,mips-*-irix6*)
    # (For those who want to force "cc -64")
    # Turn off warning "unused library"
    bytecclinkopts="-Wl,-woff,84";;
  *,alpha*-*-unicos*)
    # For the Cray T3E
    bytecccompopts="-DUMK";;
  gcc*,powerpc-*-aix*)
    # Avoid name-space pollution by requiring Unix98-conformant includes
    bytecccompopts="-fno-defer-pop $gcc_warnings -D_XOPEN_SOURCE=500";;
  *,powerpc-*-aix*)
    bytecccompopts="-D_XOPEN_SOURCE=500";;
  gcc*,*-*-cygwin*)
    bytecccompopts="-fno-defer-pop $gcc_warnings -U_WIN32"
    dllccompopts="-U_WIN32 -DCAML_DLL"
    if test $withsharedlibs = yes; then
      flexlink="flexlink -chain cygwin -merge-manifest -stack 16777216"
      flexdir=`$flexlink -where | dos2unix`
      if test -z "$flexdir"; then
        echo "flexlink not found: native shared libraries won't be available"
        withsharedlibs=no
      else
        iflexdir="-I\"$flexdir\""
        mkexe="$flexlink -exe"
      fi
    fi
    exe=".exe"
    ostype="Cygwin";;
  gcc*,x86_64-*-linux*)
    bytecccompopts="-fno-defer-pop $gcc_warnings"
    # Tell gcc that we can use 32-bit code addresses for threaded code
    # unless we are compiled for a shared library (-fPIC option)
    echo "#ifndef __PIC__" >> m.h
    echo "#  define ARCH_CODE32" >> m.h
    echo "#endif" >> m.h;;
  gcc*)
    bytecccompopts="-fno-defer-pop $gcc_warnings";;
esac

# Configure compiler to use in further tests

cc="$bytecc -O $bytecclinkopts"
export cc cclibs verbose

# Check C compiler

sh ./runtest ansi.c
case $? in
  0) echo "The C compiler is ANSI-compliant.";;
  1) echo "The C compiler $cc is not ANSI-compliant."
     echo "You need an ANSI C compiler to build OCaml."
     exit 2;;
  *) echo "Unable to compile the test program."
     echo "Make sure the C compiler $cc is properly installed."
     exit 2;;
esac

# Check the sizes of data types

echo "Checking the sizes of integers and pointers..."
set `sh ./runtest sizes.c`
case "$2,$3" in
  4,4) echo "OK, this is a regular 32 bit architecture."
       echo "#undef ARCH_SIXTYFOUR" >> m.h
       arch64=false;;
  *,8) echo "Wow! A 64 bit architecture!"
       echo "#define ARCH_SIXTYFOUR" >> m.h
       arch64=true;;
  *,*) echo "This architecture seems to be neither 32 bits nor 64 bits."
       echo "OCaml 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
if test $1 != 4 && test $2 != 4 && test $4 != 4; then
  echo "Sorry, we can't find a 32-bit integer type"
  echo "(sizeof(short) = $4, sizeof(int) = $1, sizeof(long) = $2)"
  echo "OCaml won't run on this architecture."
  exit 2
fi

echo "#define SIZEOF_INT $1" >> m.h
echo "#define SIZEOF_LONG $2" >> m.h
echo "#define SIZEOF_PTR $3" >> m.h
echo "#define SIZEOF_SHORT $4" >> m.h

if test $2 = 8; then
     echo "#define ARCH_INT64_TYPE long" >> m.h
     echo "#define ARCH_UINT64_TYPE unsigned long" >> m.h
     echo '#define ARCH_INT64_PRINTF_FORMAT "l"' >> m.h
     int64_native=true
else
  sh ./runtest longlong.c
  case $? in
  0) echo "64-bit \"long long\" integer type found (printf with \"%ll\")."
     echo "#define ARCH_INT64_TYPE long long" >> m.h
     echo "#define ARCH_UINT64_TYPE unsigned long long" >> m.h
     echo '#define ARCH_INT64_PRINTF_FORMAT "ll"' >> m.h
     int64_native=true;;
  1) echo "64-bit \"long long\" integer type found (printf with \"%q\")."
     echo "#define ARCH_INT64_TYPE long long" >> m.h
     echo "#define ARCH_UINT64_TYPE unsigned long long" >> m.h
     echo '#define ARCH_INT64_PRINTF_FORMAT "q"' >> m.h
     int64_native=true;;
  2) echo "64-bit \"long long\" integer type found (but no printf)."
     echo "#define ARCH_INT64_TYPE long long" >> m.h
     echo "#define ARCH_UINT64_TYPE unsigned long long" >> m.h
     echo '#undef ARCH_INT64_PRINTF_FORMAT' >> m.h
     int64_native=true;;
  *) echo "No suitable 64-bit integer type found, will use software emulation."
     echo "#undef ARCH_INT64_TYPE" >> m.h
     echo "#undef ARCH_UINT64_TYPE" >> m.h
     echo '#undef ARCH_INT64_PRINTF_FORMAT' >> m.h
     int64_native=false;;
  esac
fi

if test $3 = 8 && test $int64_native = false; then
  echo "This architecture has 64-bit pointers but no 64-bit integer type."
  echo "OCaml won't run on this architecture."
  exit 2
fi

# 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 "OCaml 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

case "$host" in
  sparc*-*-*|hppa*-*-*|arm*-*-*|mips*-*-*)
    # On Sparc V9 with certain versions of gcc, determination of double
    # alignment is not reliable (PR#1521), hence force it.
    # Same goes for hppa.
    # PR#5088 suggests same problem on ARM.
    # PR#5280 reports same problem on MIPS.
    # But there's a knack (PR#2572):
    # if we're in 64-bit mode (sizeof(long) == 8),
    # we must not doubleword-align floats...
    if test $2 = 8; then
      echo "Doubles can be word-aligned."
      echo "#undef ARCH_ALIGN_DOUBLE" >> m.h
    else
      echo "Doubles must be doubleword-aligned."
      echo "#define ARCH_ALIGN_DOUBLE" >> m.h
    fi;;
  *)
    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: OCaml will work even if"
         echo "this architecture has actually no alignment constraints."
         echo "#define ARCH_ALIGN_DOUBLE" >> m.h;;
    esac;;
esac

if $int64_native; then
  case "$host" in
    # PR#5088: autodetection is unreliable on ARM.  PR#5280: also on MIPS.
    sparc*-*-*|hppa*-*-*|arm*-*-*|mips*-*-*)
      if test $2 = 8; then
        echo "64-bit integers can be word-aligned."
        echo "#undef ARCH_ALIGN_INT64" >> m.h
      else
        echo "64-bit integers must be doubleword-aligned."
        echo "#define ARCH_ALIGN_INT64" >> m.h
      fi;;
    *)
      sh ./runtest int64align.c
      case $? in
        0) echo "64-bit integers can be word-aligned."
           echo "#undef ARCH_ALIGN_INT64" >> m.h;;
        1) echo "64-bit integers must be doubleword-aligned."
           echo "#define ARCH_ALIGN_INT64" >> m.h;;
        *) echo "Something went wrong during alignment determination for 64-bit integers."
           echo "I'm going to assume this architecture has alignment constraints."
           echo "That's a safe bet: OCaml will work even if"
           echo "this architecture has actually no alignment constraints."
           echo "#define ARCH_ALIGN_INT64" >> m.h;;
      esac
  esac
else
  echo "#undef ARCH_ALIGN_INT64" >> m.h
fi

# Check semantics of division and modulus

sh ./runtest divmod.c
case $? in
  0) echo "Native division and modulus have round-towards-zero semantics, will use them."
     echo "#undef NONSTANDARD_DIV_MOD" >> m.h;;
  1) echo "Native division and modulus do not have round-towards-zero semantics, will use software emulation."
     echo "#define NONSTANDARD_DIV_MOD" >> m.h;;
  *) echo "Something went wrong while checking native division and modulus, please report it."
     echo "#define NONSTANDARD_DIV_MOD" >> m.h;;
esac

# Shared library support

shared_libraries_supported=false
dl_needs_underscore=false
sharedcccompopts=''
mksharedlib=''
byteccrpath=''
mksharedlibrpath=''
natdynlinkopts=""

if test $withsharedlibs = "yes"; then
  case "$host" in
    *-*-cygwin*)
      mksharedlib="$flexlink"
      mkmaindll="$flexlink -maindll"
      shared_libraries_supported=true;;
    *-*-linux-gnu|*-*-linux|*-*-freebsd[3-9]*|*-*-openbsd*|*-*-netbsd*|*-*-gnu*)
      sharedcccompopts="-fPIC"
      mksharedlib="$bytecc -shared"
      bytecclinkopts="$bytecclinkopts -Wl,-E"
      byteccrpath="-Wl,-rpath,"
      mksharedlibrpath="-Wl,-rpath,"
      natdynlinkopts="-Wl,-E"
      shared_libraries_supported=true;;
    alpha*-*-osf*)
      case "$bytecc" in
        gcc*)
          sharedcccompopts="-fPIC"
          mksharedlib="$bytecc -shared"
          byteccrpath="-Wl,-rpath,"
          mksharedlibrpath="-Wl,-rpath,"
          shared_libraries_supported=true;;
        cc*)
          sharedcccompopts=""
          mksharedlib="ld -shared -expect_unresolved '*'"
          byteccrpath="-Wl,-rpath,"
          mksharedlibrpath="-rpath "
          shared_libraries_supported=true;;
      esac;;
    *-*-solaris2*)
      case "$bytecc" in
        gcc*)
          sharedcccompopts="-fPIC"
          if sh ./solaris-ld; then
            mksharedlib="$bytecc -shared"
            byteccrpath="-R"
            mksharedlibrpath="-R"
          else
            mksharedlib="$bytecc -shared"
            bytecclinkopts="$bytecclinkopts -Wl,-E"
            natdynlinkopts="-Wl,-E"
            byteccrpath="-Wl,-rpath,"
            mksharedlibrpath="-Wl,-rpath,"
          fi
          shared_libraries_supported=true;;
        *)
          sharedcccompopts="-KPIC"
          byteccrpath="-R"
          mksharedlibrpath="-R"
          mksharedlib="/usr/ccs/bin/ld -G"
          shared_libraries_supported=true;;
      esac;;
    mips*-*-irix[56]*)
      case "$bytecc" in
        cc*) sharedcccompopts="";;
        gcc*) sharedcccompopts="-fPIC";;
      esac
      mksharedlib="ld -shared -rdata_shared"
      byteccrpath="-Wl,-rpath,"
      mksharedlibrpath="-rpath "
      shared_libraries_supported=true;;
    i[3456]86-*-darwin[89].*)
      mksharedlib="$bytecc -bundle -flat_namespace -undefined suppress -read_only_relocs suppress"
      bytecccompopts="$dl_defs $bytecccompopts"
      dl_needs_underscore=false
      shared_libraries_supported=true;;
    *-apple-darwin*)
      mksharedlib="$bytecc -bundle -flat_namespace -undefined suppress"
      bytecccompopts="$dl_defs $bytecccompopts"
      dl_needs_underscore=false
      shared_libraries_supported=true;;
    m88k-*-openbsd*)
      shared_libraries_supported=false;;
    vax-*-openbsd*)
      shared_libraries_supported=false;;
    *-*-openbsd*)
      sharedcccompopts="-fPIC"
      mksharedlib="$bytecc -shared"
      bytecclinkopts="$bytecclinkopts -Wl,-E"
      natdynlinkopts="-Wl,-E"
      byteccrpath="-Wl,-rpath,"
      mksharedlibrpath="-Wl,-rpath,"
      shared_libraries_supported=true;;
  esac
fi

if test -z "$mkmaindll"; then
  mkmaindll=$mksharedlib
fi

# Configure native dynlink

natdynlink=false

if test $withsharedlibs = "yes"; then
  case "$host" in
    *-*-cygwin*)                  natdynlink=true;;
    i[3456]86-*-linux*)           natdynlink=true;;
    x86_64-*-linux*)              natdynlink=true;;
    i[3456]86-*-darwin[89].*)     natdynlink=true;;
    i[3456]86-*-darwin*)
      if test $arch64 == true; then
        natdynlink=true
      fi;;
    x86_64-*-darwin*)             natdynlink=true;;
    powerpc64-*-linux*)           natdynlink=true;;
    sparc-*-linux*)               natdynlink=true;;
    i686-*-kfreebsd*)             natdynlink=true;;
    x86_64-*-kfreebsd*)           natdynlink=true;;
    i[345]86-*-freebsd*)          natdynlink=true;;
    x86_64-*-freebsd*)            natdynlink=true;;
    i[345]86-*-openbsd*)          natdynlink=true;;
    x86_64-*-openbsd*)            natdynlink=true;;
    i[345]86-*-netbsd*)           natdynlink=true;;
    x86_64-*-netbsd*)             natdynlink=true;;
    i386-*-gnu0.3)                natdynlink=true;;
    arm*-*-linux*)                natdynlink=true;;
  esac
fi

if test $natdynlink = "true"; then
  cmxs="cmxs"
else
  cmxs="cmxa"
fi


# Configure the native-code compiler

arch=none
model=default
system=unknown

case "$host" in
  sparc*-*-solaris2.*)          arch=sparc; system=solaris;;
  sparc*-*-*bsd*)               arch=sparc; system=bsd;;
  sparc*-*-linux*)              arch=sparc; system=linux;;
  sparc*-*-gnu*)                arch=sparc; system=gnu;;
  i[3456]86-*-linux*)           arch=i386; system=linux_`sh ./runtest elf.c`;;
  i[3456]86-*-*bsd*)            arch=i386; system=bsd_`sh ./runtest elf.c`;;
  i[3456]86-*-nextstep*)        arch=i386; system=nextstep;;
  i[3456]86-*-solaris*)         if $arch64; then
                                  arch=amd64; system=solaris
                                else
                                  arch=i386; system=solaris
                                fi;;
  i[3456]86-*-beos*)            arch=i386; system=beos;;
  i[3456]86-*-cygwin*)          arch=i386; system=cygwin;;
  i[3456]86-*-darwin*)          if $arch64; then
                                  arch=amd64; system=macosx
                                else
                                  arch=i386; system=macosx
                                fi;;
  i[3456]86-*-gnu*)             arch=i386; system=gnu;;
  powerpc*-*-linux*)            arch=power; model=ppc; system=elf;;
  powerpc-*-netbsd*)            arch=power; model=ppc; system=elf;;
  powerpc-*-rhapsody*)          arch=power; model=ppc; system=rhapsody;;
  powerpc-*-darwin*)            arch=power; system=rhapsody
                                if $arch64; then model=ppc64; else model=ppc; fi;;
  arm*-*-linux-gnueabihf)       arch=arm; system=linux_eabihf;;
  armv7*-*-linux-gnueabi)       arch=arm; model=armv7; system=linux_eabi;;
  armv6t2*-*-linux-gnueabi)     arch=arm; model=armv6t2; system=linux_eabi;;
  armv6*-*-linux-gnueabi)       arch=arm; model=armv6; system=linux_eabi;;
  armv5te*-*-linux-gnueabi)     arch=arm; model=armv5te; system=linux_eabi;;
  armv5*-*-linux-gnueabi)       arch=arm; model=armv5; system=linux_eabi;;
  arm*-*-linux-gnueabi)         arch=arm; system=linux_eabi;;
  x86_64-*-linux*)              arch=amd64; system=linux;;
  x86_64-*-gnu*)                arch=amd64; system=gnu;;
  x86_64-*-freebsd*)            arch=amd64; system=freebsd;;
  x86_64-*-netbsd*)             arch=amd64; system=netbsd;;
  x86_64-*-openbsd*)            arch=amd64; system=openbsd;;
  x86_64-*-darwin*)             arch=amd64; system=macosx;;
esac

# Some platforms exist both in 32-bit and 64-bit variants, not distinguished
# by $host.  Turn off native code compilation on platforms where 64-bit mode
# is not supported.  (PR#4441)

if $arch64; then
  case "$arch,$model" in
    sparc,default|power,ppc)
      arch=none; model=default; system=unknown;;
  esac
fi

if test -z "$ccoption"; then
  nativecc="$bytecc"
else
  nativecc="$ccoption"
fi

nativecccompopts=''
nativecclinkopts=''
nativeccrpath="$byteccrpath"

case "$arch,$nativecc,$system,$host_type" in
  *,*,nextstep,*)      nativecccompopts="$gcc_warnings -U__GNUC__ -posix"
                       nativecclinkopts="-posix";;
  *,*,rhapsody,*darwin[1-5].*)
                       nativecccompopts="$gcc_warnings -DSHRINKED_GNUC";;
  *,*,rhapsody,*)      nativecccompopts="$gcc_warnings -DDARWIN_VERSION_6 $dl_defs"
                       if $arch64; then partialld="ld -r -arch ppc64"; fi;;
  *,gcc*,cygwin,*)     nativecccompopts="$gcc_warnings -U_WIN32";;
  amd64,gcc*,macosx,*) partialld="ld -r -arch x86_64";;
  amd64,gcc*,solaris,*) partialld="ld -r -m elf_x86_64";;
  *,gcc*,*,*)          nativecccompopts="$gcc_warnings";;
esac

asppprofflags='-DPROFILING'

case "$arch,$model,$system" in
  amd64,*,macosx)   as='as -arch x86_64'
                    aspp='gcc -arch x86_64 -c';;
  amd64,*,solaris)  as='as --64'
                    aspp='gcc -m64 -c';;
  amd64,*,*)        as='as'
                    aspp='gcc -c';;
  arm,*,*)          as='as';
                    aspp='gcc -c';;
  i386,*,solaris)   as='as'
                    aspp='/usr/ccs/bin/as -P';;
  i386,*,*)         as='as'
                    aspp='gcc -c';;
  power,*,elf)      as='as -u -m ppc'
                    aspp='gcc -c';;
  power,*,bsd)      as='as'
                    aspp='gcc -c';;
  power,*,rhapsody) as="as -arch $model"
                    aspp="$bytecc -c";;
  sparc,*,solaris)  as='as'
                    case "$cc" in
                      gcc*) aspp='gcc -c';;
                         *) aspp='as -P';;
                    esac;;
  sparc,*,*)        as='as'
                    aspp='gcc -c';;
esac

if test -n "$asoption"; then as="$asoption"; fi
if test -n "$asppoption"; then aspp="$asppoption"; fi

cc_profile='-pg'
case "$arch,$model,$system" in
  i386,*,linux_elf) profiling='prof';;
  i386,*,gnu) profiling='prof';;
  i386,*,bsd_elf) profiling='prof';;
  amd64,*,macosx) profiling='prof';;
  i386,*,macosx) profiling='prof';;
  sparc,*,solaris)
    profiling='prof'
    case "$nativecc" in gcc*) ;; *) cc_profile='-xpg';; esac;;
  amd64,*,linux) profiling='prof';;
  amd64,*,gnu) profiling='prof';;
  arm,*,linux*) profiling='prof';;
  *) profiling='noprof';;
esac

# 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

echo "ARCMD=ar" >> Makefile


# Do #! scripts work?

if (SHELL=/bin/sh; export SHELL; (./sharpbang || ./sharpbang2) >/dev/null); then
  echo "#! appears to work in shell scripts"
  case "$host" in
    *-*-sunos*|*-*-unicos*)
      echo "We won't use it, though, because under SunOS and Unicos it breaks"
      echo "on pathnames longer than 30 characters"
      echo "SHARPBANGSCRIPTS=false" >> Makefile;;
    *-*-cygwin*)
      echo "We won't use it, though, because of conflicts with .exe extension"
      echo "under Cygwin"
      echo "SHARPBANGSCRIPTS=false" >> Makefile;;
    *)
      echo "SHARPBANGSCRIPTS=true" >> Makefile;;
  esac
else
  echo "No support for #! in shell scripts"
  echo "SHARPBANGSCRIPTS=false" >> Makefile
fi

# Write the OS type (Unix or Cygwin)

echo "#define OCAML_OS_TYPE \"$ostype\"" >> s.h
echo "#define OCAML_STDLIB_DIR \"$libdir\"" >> s.h

# Use 64-bit file offset if possible

bytecccompopts="$bytecccompopts -D_FILE_OFFSET_BITS=64"
nativecccompopts="$nativecccompopts -D_FILE_OFFSET_BITS=64"

# 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 Pervasives module

if sh ./hasgot2 -i math.h $mathlib expm1 log1p hypot copysign; then
  echo "expm1(), log1p(), hypot(), copysign() found."
  echo "#define HAS_C99_FLOAT_OPS" >> s.h
fi

# For the Sys module

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

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

# For the terminfo module

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

# Configuration for the libraries

otherlibraries="unix str num dynlink bigarray"

# 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 libraries '-lnsl -lsocket')"
  cclibs="$cclibs -lnsl -lsocket"
  echo "#define HAS_SOCKETS" >> s.h
  has_sockets=yes
fi

if sh ./hasgot -i sys/socket.h -t socklen_t; then
  echo "socklen_t is defined in <sys/socket.h>"
  echo "#define HAS_SOCKLEN_T" >> s.h
fi

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

if sh ./hasgot -i sys/types.h -i sys/socket.h -i netinet/in.h \
               -t 'struct sockaddr_in6' \
&& sh ./hasgot getaddrinfo getnameinfo inet_pton inet_ntop; then
  echo "IPv6 is supported."
  echo "#define HAS_IPV6" >> s.h
fi

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

if sh ./hasgot -i sys/types.h -t off_t; then
  echo "off_t is defined in <sys/types.h>"
  echo "#define HAS_OFF_T" >> s.h
fi

if sh ./hasgot -i sys/types.h -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 sys/types.h -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

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

has_select=no
if sh ./hasgot select && \
   sh ./hasgot -i sys/types.h $select_include -t fd_set ; then
  echo "select() found."
  echo "#define HAS_SELECT" >> s.h
  has_select=yes
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 limits.h && sh ./runtest getgroups.c; then
  echo "getgroups() found."
  echo "#define HAS_GETGROUPS" >> s.h
fi

if sh ./hasgot -i limits.h -i grp.h && sh ./runtest setgroups.c; then
  echo "setgroups() found."
  echo "#define HAS_SETGROUPS" >> s.h
fi

if sh ./hasgot -i limits.h -i grp.h && sh ./runtest initgroups.c; then
  echo "initgroups() found."
  echo "#define HAS_INITGROUPS" >> 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

if 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

case "$host" in
  *-*-cygwin*) ;;  # setsid emulation under Cygwin breaks the debugger
  *) if sh ./hasgot setsid; then
       echo "setsid() found."
       echo "#define HAS_SETSID" >> s.h
     fi;;
esac

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

if sh ./hasgot -i locale.h && sh ./hasgot setlocale; then
  echo "setlocale() and <locale.h> found."
  echo "#define HAS_LOCALE" >> s.h
fi


if sh ./hasgot $dllib dlopen; then
  echo "dlopen() found."
elif sh ./hasgot $dllib -ldl dlopen; then
  echo "dlopen() found in -ldl."
  dllib="$dllib -ldl"
else
  shared_libraries_supported=false
fi

if $shared_libraries_supported; then
  echo "Dynamic loading of shared libraries is supported."
  echo "#define SUPPORT_DYNAMIC_LINKING" >> s.h
  if $dl_needs_underscore; then
    echo '#define DL_NEEDS_UNDERSCORE' >>s.h
  fi
fi

if sh ./hasgot -i sys/types.h -i sys/mman.h && sh ./hasgot mmap munmap; then
  echo "mmap() found."
  echo "#define HAS_MMAP" >> s.h
fi

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

nargs=none
for i in 5 6; do
  if sh ./trycompile -DNUM_ARGS=${i} gethostbyname.c; then nargs=$i; break; fi
done
if test $nargs != "none"; then
  echo "gethostbyname_r() found (with ${nargs} arguments)."
  echo "#define HAS_GETHOSTBYNAME_R $nargs" >> s.h
fi

nargs=none
for i in 7 8; do
  if sh ./trycompile -DNUM_ARGS=${i} gethostbyaddr.c; then nargs=$i; break; fi
done
if test $nargs != "none"; then
  echo "gethostbyaddr_r() found (with ${nargs} arguments)."
  echo "#define HAS_GETHOSTBYADDR_R $nargs" >> 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 if system stack overflows can be detected

case "$arch,$system" in
  i386,linux_elf|amd64,linux|power,rhapsody|amd64,macosx|i386,macosx)
    echo "System stack overflow can be detected."
    echo "#define HAS_STACK_OVERFLOW_DETECTION" >> s.h;;
  *)
    echo "Cannot detect system stack overflow.";;
esac

# Determine the target architecture for the "num" library

case "$arch" in
  i386)     bng_arch=ia32
            if sh ./trycompile ia32sse2.c
            then bng_asm_level=2
            else bng_asm_level=1
            fi;;
  power)    bng_arch=ppc; bng_asm_level=1;;
  amd64)    bng_arch=amd64; bng_asm_level=1;;
  *)        bng_arch=generic; bng_asm_level=0;;
esac

echo "BNG_ARCH=$bng_arch" >> Makefile
echo "BNG_ASM_LEVEL=$bng_asm_level" >> Makefile

# Determine if the POSIX threads library is supported

systhread_support=false

if test "$pthread_wanted" = "yes"; then
  case "$host" in
    *-*-solaris*)  pthread_link="-lpthread -lposix4"
                   pthread_caml_link="-cclib -lpthread -cclib -lposix4";;
    *-*-freebsd*)  pthread_link="-pthread"
                   pthread_caml_link="-cclib -pthread";;
    *-*-openbsd*)  pthread_link="-pthread"
                   pthread_caml_link="-cclib -pthread";;
    *)             pthread_link="-lpthread"
                   pthread_caml_link="-cclib -lpthread";;
  esac
  if ./hasgot -i pthread.h $pthread_link pthread_self; then
    echo "POSIX threads library supported."
    systhread_support=true
    otherlibraries="$otherlibraries systhreads"
    bytecccompopts="$bytecccompopts -D_REENTRANT"
    nativecccompopts="$nativecccompopts -D_REENTRANT"
    case "$host" in
      *-*-freebsd*)
          bytecccompopts="$bytecccompopts -D_THREAD_SAFE"
          nativecccompopts="$nativecccompopts -D_THREAD_SAFE";;
      *-*-openbsd*)
          bytecccompopts="$bytecccompopts -pthread"
          asppflags="$asppflags -pthread"
          nativecccompopts="$nativecccompopts -pthread";;
    esac
    echo "Options for linking with POSIX threads: $pthread_link"
    if sh ./hasgot $pthread_link sigwait; then
      echo "sigwait() found"
      echo "#define HAS_SIGWAIT" >> s.h
    fi
  else
    echo "POSIX threads not found."
    pthread_link=""
  fi
else
  pthread_link=""
fi
echo "PTHREAD_LINK=$pthread_caml_link" >> Makefile

# Determine if the bytecode thread library is supported

if test "$has_select" = "yes" \
&& test "$has_setitimer" = "yes" \
&& test "$has_gettimeofday" = "yes" \
&& test "$has_wait" = "yes"; then
  echo "Bytecode threads library supported."
  otherlibraries="$otherlibraries threads"
else
  echo "Bytecode threads library not supported (missing system calls)"
fi

# Determine the location of X include files and libraries

# If the user specified -x11include and/or -x11lib, these settings
# are used. Otherwise, we check whether there is pkg-config, and take
# the flags from there. Otherwise, we search the location.

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

if test -z "$x11_include_dir" -a -z "$x11_lib_dir"; then
  if pkg-config --exists x11 2>/dev/null; then
    x11_include=`pkg-config --cflags x11`
    x11_link=`pkg-config --libs x11`
  fi
fi

if test "$x11_include" = "not found"; then
  for dir in \
    $x11_include_dir          \
                              \
    /usr/X11R7/include        \
    /usr/include/X11R7        \
    /usr/local/X11R7/include  \
    /usr/local/include/X11R7  \
    /opt/X11R7/include        \
                              \
    /usr/X11R6/include        \
    /usr/include/X11R6        \
    /usr/local/X11R6/include  \
    /usr/local/include/X11R6  \
    /opt/X11R6/include        \
                              \
    /usr/X11/include          \
    /usr/include/X11          \
    /usr/local/X11/include    \
    /usr/local/include/X11    \
    /opt/X11/include          \
                              \
    /usr/X11R5/include        \
    /usr/include/X11R5        \
    /usr/local/X11R5/include  \
    /usr/local/include/X11R5  \
    /usr/local/x11r5/include  \
    /opt/X11R5/include        \
                              \
    /usr/X11R4/include        \
    /usr/include/X11R4        \
    /usr/local/X11R4/include  \
    /usr/local/include/X11R4  \
                              \
    /usr/X386/include         \
    /usr/x386/include         \
    /usr/XFree86/include/X11  \
                              \
    /usr/include              \
    /usr/local/include        \
    /usr/unsupported/include  \
    /usr/athena/include       \
    /usr/lpp/Xamples/include  \
                              \
    /usr/openwin/include      \
    /usr/openwin/share/include \
    ; \
    do
    if test -f $dir/X11/X.h; then
      x11_include_dir=$dir
      x11_include="-I$dir"
      break
    fi
  done

  if test "$x11_include" = "not found"; then
      x11_try_lib_dir=''
  else
      x11_try_lib_dir=`echo $x11_include_dir | sed -e 's|include|lib|'`
  fi

  for dir in \
    $x11_lib_dir          \
    $x11_try_lib_dir      \
                          \
    /usr/X11R6/lib64      \
    /usr/X11R6/lib        \
    /usr/lib/X11R6        \
    /usr/local/X11R6/lib  \
    /usr/local/lib/X11R6  \
    /opt/X11R6/lib        \
                          \
    /usr/X11/lib          \
    /usr/lib/X11          \
    /usr/local/X11/lib    \
    /usr/local/lib/X11    \
    /opt/X11/lib          \
                          \
    /usr/X11R5/lib        \
    /usr/lib/X11R5        \
    /usr/local/X11R5/lib  \
    /usr/local/lib/X11R5  \
    /usr/local/x11r5/lib  \
    /opt/X11R5/lib        \
                          \
    /usr/X11R4/lib        \
    /usr/lib/X11R4        \
    /usr/local/X11R4/lib  \
    /usr/local/lib/X11R4  \
                          \
    /usr/X386/lib         \
    /usr/x386/lib         \
    /usr/XFree86/lib/X11  \
                          \
    /usr/lib64            \
    /usr/lib              \
    /usr/local/lib        \
    /usr/unsupported/lib  \
    /usr/athena/lib       \
    /usr/lpp/Xamples/lib  \
    /lib/usr/lib/X11      \
                          \
    /usr/openwin/lib      \
    /usr/openwin/share/lib    \
                              \
    /usr/lib/i386-linux-gnu   \
    /usr/lib/x86_64-linux-gnu \
    ; \
    do
    if test -f $dir/libX11.a || \
       test -f $dir/libX11.so || \
       test -f $dir/libX11.dll.a || \
       test -f $dir/libX11.dylib || \
       test -f $dir/libX11.sa; then
      if test $dir = /usr/lib; then
        x11_link="-lX11"
      else
        x11_libs="-L$dir"
        case "$host" in
          *-kfreebsd*-gnu) x11_link="-L$dir -lX11";;
          *-*-*bsd*) x11_link="-R$dir -L$dir -lX11";;
          *) x11_link="-L$dir -lX11";;
        esac
      fi
      break
    fi
  done
fi

if test "x11_include" != "not found"; then
  if test "$x11_include" = "-I/usr/include"; then
    x11_include=""
  fi
  if ./hasgot $x11_include $x11_link -i X11/Xlib.h XrmInitialize; then
    echo "X11 works"
  else
    echo "Cannot compile X11 program"
    x11_include="not found"
  fi
fi

has_graph=false
if test "$x11_include" = "not found" || test "$x11_link" = "not found"
then
  echo "X11 not found, the \"graph\" library will not be supported."
  x11_include="not found"
  x11_link="not found"
else
  echo "Options for compiling for X11: $x11_include"
  echo "Options for linking with X11: $x11_link"
  if test "$graph_wanted" = yes
  then
    has_graph=true
    otherlibraries="$otherlibraries graph"
  fi
fi
echo "X11_INCLUDES=$x11_include" >> Makefile
echo "X11_LINK=$x11_link" >> Makefile

# Look for tcl/tk

echo "Configuring LablTk..."

if test $tk_wanted = no; then
  has_tk=false
elif test $tk_x11 = no; then
  has_tk=true
elif test "$x11_include" = "not found" || test "$x11_link" = "not found"; then
  echo "X11 not found or disabled."
  has_tk=false
else
  tk_x11_include="$x11_include"
  tk_x11_libs="$x11_link"
  has_tk=true
fi

if test $has_tk = true; then
  tcl_version=''
  tcl_version=`sh ./runtest $tk_defs $tk_x11_include tclversion.c`
  for tk_incs in \
    "-I/usr/local/include" \
    "-I/usr/include" \
    "-I/usr/local/include/tcl8.5 -I/usr/local/include/tk8.5" \
    "-I/usr/include/tcl8.5 -I/usr/include/tk8.5" \
    "-I/usr/local/include/tcl8.4 -I/usr/local/include/tk8.4" \
    "-I/usr/include/tcl8.4 -I/usr/include/tk8.4" \
    "-I/usr/local/include/tcl8.3 -I/usr/local/include/tk8.3" \
    "-I/usr/include/tcl8.3 -I/usr/include/tk8.3" \
    "-I/usr/local/include/tcl8.2 -I/usr/local/include/tk8.2" \
    "-I/usr/include/tcl8.2 -I/usr/include/tk8.2" \
    "-I/sw/include" \
    "-I/usr/pkg/include"
  do if test -z "$tcl_version"; then
    tk_defs="$tk_incs"
    tcl_version=`sh ./runtest $tk_defs $tk_x11_include tclversion.c`
  fi; done
  if test -n "$tcl_version" && test "x$tcl_version" != "xnone"; then
    echo "tcl.h and tk.h version $tcl_version found with \"$tk_defs\"."
    case $tcl_version in
    8.5) tclmaj=8 tclmin=5 tkmaj=8 tkmin=5 ;;
    8.4) tclmaj=8 tclmin=4 tkmaj=8 tkmin=4 ;;
    8.3) tclmaj=8 tclmin=3 tkmaj=8 tkmin=3 ;;
    8.2) tclmaj=8 tclmin=2 tkmaj=8 tkmin=2 ;;
    8.1) tclmaj=8 tclmin=1 tkmaj=8 tkmin=1 ;;
    8.0) tclmaj=8 tclmin=0 tkmaj=8 tkmin=0 ;;
    7.6) tclmaj=7 tclmin=6 tkmaj=4 tkmin=2 ;;
    7.5) tclmaj=7 tclmin=5 tkmaj=4 tkmin=1 ;;
    *) echo "This version is not known."; has_tk=false ;;
    esac
  else
    echo "tcl.h and/or tk.h not found."
    has_tk=false
  fi
fi

tkauxlibs="$mathlib $dllib"
tcllib=''
tklib=''
if test $has_tk = true; then
  if test -n "$tk_libs" && \
     sh ./hasgot $tk_libs $tk_x11_libs $tkauxlibs Tcl_DoOneEvent
  then tk_libs="$tk_libs $dllib"
  elif sh ./hasgot $tk_libs -ltcl$tclmaj.$tclmin $tkauxlibs Tcl_DoOneEvent
  then
    tk_libs="$tk_libs -ltk$tkmaj.$tkmin -ltcl$tclmaj.$tclmin $dllib"
  elif sh ./hasgot $tk_libs -ltcl$tclmaj$tclmin $tkauxlibs Tcl_DoOneEvent
  then
    tk_libs="$tk_libs -ltk$tkmaj$tkmin -ltcl$tclmaj$tclmin $dllib"
  elif test -z "$tk_libs" && tk_libs=-L/usr/local/lib && \
    sh ./hasgot $tk_libs -ltcl$tclmaj.$tclmin $tkauxlibs Tcl_DoOneEvent
  then
    tk_libs="$tk_libs -ltk$tkmaj.$tkmin -ltcl$tclmaj.$tclmin $dllib"
  elif sh ./hasgot $tk_libs -ltcl$tclmaj$tclmin $tkauxlibs Tcl_DoOneEvent
  then
    tk_libs="$tk_libs -ltk$tkmaj$tkmin -ltcl$tclmaj$tclmin $dllib"
  elif sh ./hasgot -L/sw/lib $tk_libs -ltcl$tclmaj.$tclmin $tkauxlibs \
                   Tcl_DoOneEvent
  then tk_libs="-L/sw/lib -ltk$tkmaj.$tkmin -ltcl$tclmaj.$tclmin $dllib"
  elif sh ./hasgot -L/usr/pkg/lib $tk_libs $tk_x11_libs \
        -ltk$tkmaj$tkmin -ltcl$tclmaj$tclmin -lpthread $tkauxlibs \
                   Tcl_DoOneEvent
  then
    case "$host" in
      *-*-*bsd*) tk_libs="-R/usr/pkg/lib -L/usr/pkg/lib $tk_libs $tk_x11_libs -ltk$tkmaj$tkmin -ltcl$tclmaj$tclmin -lpthread $tkauxlibs";;
      *) tk_libs="-L/usr/pkg/lib $tk_libs $tk_x11_libs -ltk$tkmaj$tkmin -ltcl$tclmaj$tclmin -lpthread $tkauxlibs";;
    esac
  else
    echo "Tcl library not found."
    has_tk=false
  fi
fi

if test $has_tk = true; then
  if sh ./hasgot $tk_libs $tk_x11_libs $tkauxlibs Tk_SetGrid; then
    echo "Tcl/Tk libraries found."
  elif sh ./hasgot -L/sw/lib $tk_libs $tk_x11_libs $tkauxlibs Tk_SetGrid; then
    case "$host" in
      *-*-*bsd*) tk_libs="-R/sw/lib -L/sw/lib $tk_libs";;
      *) tk_libs="-L/sw/lib $tk_libs";;
    esac
    echo "Tcl/Tk libraries found."
  elif sh ./hasgot -L/usr/pkg/lib $tk_libs $tk_x11_libs $tkauxlibs \
                   Tk_SetGrid; then
    case "$host" in
      *-*-*bsd*) tk_libs="-R/usr/pkg/lib -L/usr/pkg/lib $tk_libs";;
      *) tk_libs="-L/usr/pkg/lib $tk_libs";;
    esac
    echo "Tcl/Tk libraries found."
  else
    echo "Tcl library found."
    echo "Tk library not found."
    has_tk=false
  fi
fi

if test $has_tk = true; then
  if test $tk_x11 = yes; then
    echo "TK_DEFS=$tk_defs "'$(X11_INCLUDES)' >> Makefile
    echo "TK_LINK=$tk_libs "'$(X11_LINK)' >> Makefile
  else
    echo "TK_DEFS=$tk_defs" >> Makefile
    echo "TK_LINK=$tk_libs" >> Makefile
  fi
  otherlibraries="$otherlibraries labltk"
else
  echo "Configuration failed, LablTk will not be built."
  echo "TK_DEFS=" >> Makefile
  echo "TK_LINK=" >> Makefile
fi

# Look for BFD library

if ./hasgot -i bfd.h && \
   ./hasgot -lbfd -ldl -liberty -lz bfd_openr; then
  echo "BFD library found."
  echo "#define HAS_LIBBFD" >> s.h
  echo "LIBBFD_LINK=-lbfd -ldl -liberty -lz" >> Makefile
else
  echo "BFD library not found, 'objinfo' will be unable to display info on .cmxs files"
  echo "LIBBFD_LINK=" >> Makefile
fi

# Check whether assembler supports CFI directives

asm_cfi_supported=false

export aspp

if sh ./tryassemble cfi.S; then
  echo "#define ASM_CFI_SUPPORTED" >> m.h
  asm_cfi_supported=true
fi

# Final twiddling of compiler options to work around known bugs

nativeccprofopts="$nativecccompopts"
case "$buggycc" in
  gcc.2.96)
    bytecccompopts="$bytecccompopts -fomit-frame-pointer"
    nativecccompopts="$nativecccompopts -fomit-frame-pointer";;
esac

# Finish generated files

cclibs="$cclibs $mathlib"

echo "BYTECC=$bytecc" >> Makefile
echo "BYTECCCOMPOPTS=$bytecccompopts" >> Makefile
echo "BYTECCLINKOPTS=$bytecclinkopts" >> Makefile
echo "BYTECCLIBS=$cclibs $dllib $curseslibs $pthread_link" >> Makefile
echo "BYTECCRPATH=$byteccrpath" >> Makefile
echo "EXE=$exe" >> Makefile
echo "SUPPORTS_SHARED_LIBRARIES=$shared_libraries_supported" >> Makefile
echo "SHAREDCCCOMPOPTS=$sharedcccompopts" >> Makefile
echo "MKSHAREDLIBRPATH=$mksharedlibrpath" >> Makefile
echo "NATDYNLINKOPTS=$natdynlinkopts" >> Makefile
cat >> Makefile <<EOF
SYSLIB=-l\$(1)
#ml let syslib x = "-l"^x;;

### How to build a static library
MKLIB=ar rc \$(1) \$(2); ranlib \$(1)
#ml let mklib out files opts = Printf.sprintf "ar rc %s %s %s; ranlib %s" out opts files out;;
EOF
echo "ARCH=$arch" >> Makefile
echo "MODEL=$model" >> Makefile
echo "SYSTEM=$system" >> Makefile
echo "NATIVECC=$nativecc" >> Makefile
echo "NATIVECCCOMPOPTS=$nativecccompopts" >> Makefile
echo "NATIVECCPROFOPTS=$nativeccprofopts" >> Makefile
echo "NATIVECCLINKOPTS=$nativecclinkopts" >> Makefile
echo "NATIVECCRPATH=$nativeccrpath" >> Makefile
echo "NATIVECCLIBS=$cclibs $dllib" >> Makefile
echo "ASM=$as" >> Makefile
echo "ASPP=$aspp" >> Makefile
echo "ASPPPROFFLAGS=$asppprofflags" >> Makefile
echo "PROFILING=$profiling" >> Makefile
echo "DYNLINKOPTS=$dllib" >> Makefile
echo "OTHERLIBRARIES=$otherlibraries" >> Makefile
echo "DEBUGGER=$debugger" >> Makefile
echo "CC_PROFILE=$cc_profile" >> Makefile
echo "SYSTHREAD_SUPPORT=$systhread_support" >> Makefile
echo "PARTIALLD=$partialld" >> Makefile
echo "PACKLD=\$(PARTIALLD) \$(NATIVECCLINKOPTS) -o " \
  | sed -e 's/ $/\\ /' >> Makefile
echo "DLLCCCOMPOPTS=$dllccompopts" >> Makefile
echo "IFLEXDIR=$iflexdir" >> Makefile
echo "O=o" >> Makefile
echo "A=a" >> Makefile
echo "SO=so" >> Makefile
echo "EXT_OBJ=.o" >> Makefile
echo "EXT_ASM=.s" >> Makefile
echo "EXT_LIB=.a" >> Makefile
echo "EXT_DLL=.so" >> Makefile
echo "EXTRALIBS=" >> Makefile
echo "CCOMPTYPE=cc" >> Makefile
echo "TOOLCHAIN=cc" >> Makefile
echo "NATDYNLINK=$natdynlink" >> Makefile
echo "CMXS=$cmxs" >> Makefile
echo "MKEXE=$mkexe" >> Makefile
echo "MKDLL=$mksharedlib" >> Makefile
echo "MKMAINDLL=$mkmaindll" >> Makefile
echo "RUNTIMED=${debugruntime}" >>Makefile
echo "CAMLP4=${withcamlp4}" >>Makefile
echo "ASM_CFI_SUPPORTED=$asm_cfi_supported" >> 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 OCaml 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 $dllib $curseslibs $pthread_link"
if $shared_libraries_supported; then
echo "        shared libraries are supported"
echo "        options for compiling..... $sharedcccompopts $bytecccompopts"
echo "        command for building...... $mksharedlib -o lib.so $mksharedlibrpath/a/path objs"
else
echo "        shared libraries not supported"
fi

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"
  echo "        preprocessed assembler ... $aspp"
  if test "$asm_cfi_supported" = "true"; then
  echo "        assembler supports CFI ... yes"
  else
  echo "        assembler supports CFI ... no"
  fi
  echo "        native dynlink ........... $natdynlink"
  if test "$profiling" = "prof"; then
  echo "        profiling with gprof ..... supported"
  else
  echo "        profiling with gprof ..... not supported"
  fi
fi

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

if test "$debugruntime" = "runtimed"; then
  echo "Debug runtime will be compiled and installed"
fi

echo "Additional libraries supported:"
echo "        $otherlibraries"

echo "Configuration for the \"num\" library:"
echo "        target architecture ...... $bng_arch (asm level $bng_asm_level)"

if $has_graph; then
echo "Configuration for the \"graph\" library:"
echo "        options for compiling .... $x11_include"
echo "        options for linking ...... $x11_link"
else
echo "The \"graph\" library: not supported"
fi

if test $has_tk = true; then
echo "Configuration for the \"labltk\" library:"
echo "        use tcl/tk version ....... $tcl_version"
echo "        options for compiling .... $tk_defs $x11_includes"
echo "        options for linking ...... $tk_libs $x11_link"
else
echo "The \"labltk\" library: not supported"
fi

echo
echo "** OCaml configuration completed successfully **"
echo

if test ! -z "$MACOSX_DEPLOYMENT_TARGET"; then
  echo "WARNING: the environment variable MACOSX_DEPLOYMENT_TARGET is set."
  echo "This will probably prevent compiling the OCaml system."
fi