ocaml/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.         #
#                                                                       #
#########################################################################

ocamlversion=`head -1 VERSION`
echo "Configuring OCaml version $ocamlversion"

configure_options="$*"
prefix=/usr/local
bindir=''
target_bindir=''
libdir=''
mandir=''
manext=1
host_type=unknown
target_type=""
ccoption=''
asoption=''
asppoption=''
cclibs=''
curseslibs=''
mathlib='-lm'
dllib=''
x11_include_dir=''
x11_lib_dir=''
graph_wanted=yes
pthread_wanted=yes
dl_defs=''
verbose=no
with_curses=yes
debugruntime=noruntimed
with_instrumented_runtime=false
with_sharedlibs=yes
partialld="ld -r"
with_debugger=ocamldebugger
with_ocamldoc=ocamldoc
with_ocamlbuild=ocamlbuild
with_frame_pointers=false
no_naked_pointers=false
native_compiler=true
TOOLPREF=""
with_cfi=true
flambda=false

# 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

# The inf(), wrn(), err() functions below can be used to provide a consistent
# way to notify the user. The notification is always given to the stdout
# descriptor.
#
# Their output is redirected to a file-descriptor "3" which is then redirected
# to fd 1 at the level of the whole configure script. This is done to not
# conflict with how values are returned from functions in shell script.
# Consider the following where "It works!" would be mixed with "42".
#   do_foo() {
#     if some_command; then
#       inf "It works!"
#       echo "42"
#     fi
#   }
inf() {
  printf "%b\n" "$*" 1>&3
}

wrn() {
  printf "[WARNING] %b\n" "$*" 1>&3
}

err() {
  printf "[ERROR!] %b\n" "$*" 1>&3
  exit 2
}

exec 3>&1

# Parse command-line arguments

while : ; do
  case "$1" in
    "") break;;
    -prefix|--prefix)
        prefix=$2; shift;;
    -bindir|--bindir)
        bindir=$2; shift;;
    -target-bindir|--target-bindir)
        target_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;;
    -target*|--target*)
        target_type=$2; shift;;
    -cc*)
        ccoption="$2"; shift;;
    -as)
        asoption="$2"; shift;;
    -aspp)
        asppoption="$2"; shift;;
    -lib*)
        cclibs="$2 $cclibs"; shift;;
    -no-curses|--no-curses)
        with_curses=no;;
    -no-shared-libs|--no-shared-libs)
        with_sharedlibs=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;;
    -partialld|--partialld)
        partialld="$2"; shift;;
    -dldefs*|--dldefs*)
        dl_defs="$2"; shift;;
    -dllibs*|--dllibs*)
        dllib="$2"; shift;;
    -verbose|--verbose)
        verbose=yes;;
    -with-debug-runtime|--with-debug-runtime)
        debugruntime=runtimed;;
    -with-instrumented-runtime|--with-instrumented-runtime)
        with_instrumented_runtime=true;;
    -no-debugger|--no-debugger)
        with_debugger="";;
    -no-ocamldoc|--no-ocamldoc)
        with_ocamldoc="";;
    -no-ocamlbuild|--no-ocamlbuild)
        with_ocamlbuild="";;
    -with-frame-pointers|--with-frame-pointers)
        with_frame_pointers=true;;
    -no-naked-pointers|--no-naked-pointers)
        no_naked_pointers=true;;
    -no-cfi|--no-cfi)
        with_cfi=false;;
    -no-native-compiler)
        native_compiler=false;;
    -flambda)
        flambda=true;;
    *) if echo "$1" | grep -q -e '^--\?[a-zA-Z0-9-]\+='; then
         err "configure expects arguments of the form '-prefix /foo/bar'," \
             "not '-prefix=/foo/bar' (note the '=')."
       else
         err "Unknown option \"$1\"."
       fi;;
  esac
  shift
done

# Sanity checks

case "$prefix" in
  /*) ;;
   *) err "The -prefix directory must be absolute.";;
esac
case "$bindir" in
  /*) ;;
  "") ;;
  '$(PREFIX)/'*) ;;
   *) err 'The -bindir directory must be absolute or relative to $(PREFIX).';;
esac
case "$libdir" in
  /*) ;;
  "") ;;
  '$(PREFIX)/'*) ;;
   *) err 'The -libdir directory must be absolute or relative to $(PREFIX).';;
esac
case "$mandir" in
  /*) ;;
  "") ;;
  '$(PREFIX)/'*) ;;
   *) err 'The -mandir directory must be absolute or relative to $(PREFIX).';;
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
    err "Cannot guess host type. You must specify one with the -host option."
  fi
fi
if host=`../gnu/config.sub $host_type`; then :; else
  err "Please specify the correct host type with the -host option"
fi
inf "Configuring for host $host ..."

if test -n "$target_type"; then
  target="$target_type"
  TOOLPREF="${target}-"
else
  target="$host"
fi
inf "Configuring for target $target ..."

if [ x"$host" = x"$target" ]; then
  cross_compiler=false
else
  cross_compiler=true
fi

# Do we have gcc?

if test -z "$ccoption"; then
  if sh ./searchpath "${TOOLPREF}gcc"; then
    cc="${TOOLPREF}gcc"
  else
    if $cross_compiler; then
      err "No cross-compiler found for ${target}.\n" \
          "It should be named ${TOOLPREF}gcc and be in the PATH."
    else
      cc="cc"
    fi
  fi
else
  cc="$ccoption"
fi

inf "Using compiler $cc."

# Determine the C compiler family (GCC, Clang, etc)

ccfamily=`$cc -E cckind.c | grep '^[a-z]' | tr -s ' ' '-'`
case $? in
  0) inf "Compiler family and version: $ccfamily.";;
  *) err "Unable to preprocess the test program.\n" \
         "Make sure the C compiler $cc is properly installed.";;
esac

# Configure the bytecode compiler

bytecc="$cc"
mkexe="\$(BYTECC)"
mkexedebugflag="-g"
bytecccompopts=""
bytecclinkopts=""
dllccompopts=""
ostype="Unix"
exe=""
iflexdir=""
SO="so"
TOOLCHAIN="cc"

# Choose reasonable options based on compiler kind
# We select high optimization levels, provided we can turn off:
# - strict type-based aliasing analysis (too risky for the OCaml runtime)
# - strict no-overflow conditions on signed integer arithmetic
#   (the OCaml runtime assumes Java-style behavior of signed integer arith.)
# Concerning optimization level, -O3 is somewhat risky, so take -O2.
# Concerning language version, gnu99 is ISO C99 plus GNU extensions
# that are often used in standard headers.  Older GCC versions
# defaults to gnu89, which is not C99.  Clang defaults to gnu99 or
# gnu11, which is fine.

case "$ocamlversion" in
  *+dev*) gcc_warnings="-Wall -Werror";;
       *) gcc_warnings="-Wall";;
esac

case "$ccfamily" in
  clang-*)
    bytecccompopts="-O2 -fno-strict-aliasing -fwrapv $gcc_warnings";;
  gcc-[012]-*)
    # Some versions known to miscompile OCaml, e,g, 2.7.2.1, some 2.96.
    # Plus: C99 support unknown.
    err "This version of GCC is too old.  Please use GCC version 4.2 or above.";;
  gcc-3-*|gcc-4-[01])
    # No -fwrapv option before GCC 3.4.
    # Known problems with -fwrapv fixed in 4.2 only.
    wrn "This version of GCC is rather old.  Reducing optimization level."
    wrn "Consider using GCC version 4.2 or above."
    bytecccompopts="-std=gnu99 -O $gcc_warnings";;
  gcc-*)
    bytecccompopts="-std=gnu99 -O2 -fno-strict-aliasing -fwrapv $gcc_warnings";;
  *)
    bytecccompopts="-O";;
esac

# Adjust according to target

case "$bytecc,$target" in
  cc,*-*-nextstep*)
    # GNU C extensions disabled, but __GNUC__ still defined!
    bytecccompopts="$bytecccompopts -U__GNUC__ -posix"
    bytecclinkopts="-posix";;
  *,*-*-rhapsody*)
    # Almost the same as NeXTStep
    bytecccompopts="$bytecccompopts -DSHRINKED_GNUC"
    mathlib="";;
  *,*-*-darwin*)
    mathlib=""
    mkexe="$mkexe -Wl,-no_compact_unwind"
    # Tell gcc that we can use 32-bit code addresses for threaded code
    # unless we are compiled for a shared library (-fPIC option)
    echo "#ifndef __PIC__" >> m.h
    echo "#  define ARCH_CODE32" >> m.h
    echo "#endif" >> m.h;;
  *,*-*-haiku*)
    # No -lm library
    mathlib="";;
  *,*-*-beos*)
    # No -lm library
    mathlib="";;
  *gcc,alpha*-*-osf*)
    if cc="$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 $bytecccompopts";
    fi;;
  *,mips-*-irix6*)
    # Turn off warning "unused library"
    bytecclinkopts="-n32 -Wl,-woff,84";;
  *,alpha*-*-unicos*)
    # For the Cray T3E
    bytecccompopts="$bytecccompopts -DUMK";;
  *,powerpc-*-aix*)
    # Avoid name-space pollution by requiring Unix98-conformant includes
    bytecccompopts="$bytecccompopts -D_XOPEN_SOURCE=500 -D_ALL_SOURCE";;
  *,*-*-cygwin*)
    case $target in
      i686-*) flavor=cygwin;;
      x86_64-*) flavor=cygwin64;;
      *) err "unknown cygwin variant";;
    esac
    bytecccompopts="$bytecccompopts -U_WIN32"
    dllccompopts="-U_WIN32 -DCAML_DLL"
    if test $with_sharedlibs = yes; then
      flexlink="flexlink -chain $flavor -merge-manifest -stack 16777216"
      flexdir=`$flexlink -where | dos2unix`
      if test -z "$flexdir"; then
        wrn "flexlink not found: native shared libraries won't be available."
        with_sharedlibs=no
      else
        iflexdir="-I\"$flexdir\""
        mkexe="$flexlink -exe"
        mkexedebugflag="-link -g"
      fi
    fi
    if test $with_sharedlibs = no; then
      mkexe="$mkexe -Wl,--stack,16777216"
      bytecclinkopts="-Wl,--stack,16777216"
    fi
    exe=".exe"
    ostype="Cygwin";;
  *,*-*-mingw*)
    dllccompopt="-DCAML_DLL"
    if test $with_sharedlibs = yes; then
      case "$target" in
        i686-*-*)   flexlink_chain="mingw";;
        x86_64-*-*) flexlink_chain="mingw64";;
      esac
      flexlink="flexlink -chain $flexlink_chain -merge-manifest -stack 16777216"
      flexdir=`$flexlink -where`
      if test -z "$flexdir"; then
        wrn "flexlink not found: native shared libraries won't be available."
        with_sharedlibs=no
      else
        iflexdir="-I\"$flexdir\""
        mkexe="$flexlink -exe"
        mkexedebugflag="-link -g"
      fi
    fi
    exe=".exe"
    ostype="Win32"
    TOOLCHAIN="mingw"
    SO="dll"
    ;;
  *,x86_64-*-linux*)
    # 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;;
esac

# Configure compiler to use in further tests.

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

# Check C compiler.

cc="$bytecc $bytecccompopts $bytecclinkopts" sh ./runtest ansi.c
case $? in
  0) inf "The C compiler is ISO C99 compliant." ;;
  1) wrn "The C compiler is ANSI / ISO C90 compliant, but not ISO C99" \
         "compliant.";;
  2) err "The C compiler $cc is not ISO C compliant.\n" \
         "You need an ISO C99 compiler to build OCaml.";;
  *)
     if $cross_compiler; then
       wrn "Unable to compile the test program.\n" \
           "This failure is expected for cross-compilation:\n" \
           "we will assume the C compiler is ISO C99-compliant."
     else
       err "Unable to compile the test program.\n" \
           "Make sure the C compiler $cc is properly installed."
     fi;;
esac

# For cross-compilation, we need a host-based ocamlrun and ocamlyacc,
# and the user must specify the target BINDIR
if $cross_compiler; then
  if ! sh ./searchpath ocamlrun; then
    err "Cross-compilation requires an ocaml runtime environment\n" \
        "(the ocamlrun binary). Moreover, its version must be the same\n" \
        "as the one you're trying to build (`cut -f1 -d+ < ../../VERSION`)."
  else
    ocaml_system_version=`ocamlrun -version | sed 's/[^0-9]*\([0-9.]*\).*/\1/'`
    ocaml_source_version=`sed -n '1 s/\([0-9\.]*\).*/\1/ p' < ../../VERSION`
    if test x"$ocaml_system_version" != x"$ocaml_source_version"; then
      err "While you have an ocaml runtime environment, its version\n" \
          "($ocaml_system_version) doesn't match the version of these\n" \
          "sources ($ocaml_source_version)."
    else
      echo "CAMLRUN=`./searchpath -p ocamlrun`" >> Makefile
    fi
  fi

  if ! sh ./searchpath ocamlyacc; then
    err "Cross-compilation requires an ocamlyacc binary."
  else
    ocamlyacc 2>/dev/null
    if test "$?" -ne 1; then
      err "While you have an ocamlyacc binary, it cannot be executed" \
          "successfully."
    else
      echo "CAMLYACC=`./searchpath -p ocamlyacc`" >> Makefile
    fi
  fi

  if [ -z "$target_bindir" ]; then
    err "Cross-compilation requires -target-bindir."
  else
    echo "TARGET_BINDIR=$target_bindir" >> Makefile
  fi
fi # cross-compiler


# Check the sizes of data types
# OCaml needs a 32 or 64 bit architecture, a 32-bit integer type and
# a 64-bit integer type

inf "Checking the sizes of integers and pointers..."
ret=`sh ./runtest sizes.c`
# $1 = sizeof(int)
# $2 = sizeof(long)
# $3 = sizeof(pointers)
# $4 = sizeof(short)
# $5 = sizeof(long long)

if test "$?" -eq 0; then
  set $ret
  case "$3" in
    4) inf "OK, this is a regular 32 bit architecture."
       echo "#undef ARCH_SIXTYFOUR" >> m.h
       arch64=false;;
    8) inf "Wow! A 64 bit architecture!"
       echo "#define ARCH_SIXTYFOUR" >> m.h
       arch64=true;;
    *) err "This architecture seems to be neither 32 bits nor 64 bits.\n" \
           "OCaml won't run on this architecture.";;
  esac
else
  # For cross-compilation, runtest always fails: add special handling.
  case "$target" in
    i686-*-mingw*) inf "OK, this is a regular 32 bit architecture."
                   echo "#undef ARCH_SIXTYFOUR" >> m.h
                   set 4 4 4 2 8
                   arch64=false;;
    x86_64-*-mingw*) inf "Wow! A 64 bit architecture!"
                     echo "#define ARCH_SIXTYFOUR" >> m.h
                     set 4 4 8 2 8
                     arch64=true;;
    *) err "Since datatype sizes cannot be guessed when cross-compiling,\n" \
           "a hardcoded list is used but your architecture isn't known yet.\n" \
           "You need to determine the sizes yourself.\n" \
           "Please submit a bug report in order to expand the list." ;;
  esac
fi

if test $1 != 4 && test $2 != 4 && test $4 != 4; then
  err "Sorry, we can't find a 32-bit integer type\n" \
      "(sizeof(short) = $4, sizeof(int) = $1, sizeof(long) = $2)\n" \
     "OCaml won't run on this architecture."
fi

if test $2 != 8 && test $5 != 8; then
  err "Sorry, we can't find a 64-bit integer type\n" \
      "(sizeof(long) = $2, sizeof(long long) = $5)\n" \
     "OCaml won't run on this architecture."
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
echo "#define SIZEOF_LONGLONG $5" >> m.h

# Determine endianness

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

# Determine alignment constraints

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

case "$target" in
  # PR#5088: autodetection is unreliable on ARM.  PR#5280: also on MIPS.
  sparc*-*-*|hppa*-*-*|arm*-*-*|mips*-*-*)
    if test $2 = 8; then
      inf "64-bit integers can be word-aligned."
      echo "#undef ARCH_ALIGN_INT64" >> m.h
    else
      inf "64-bit integers must be doubleword-aligned."
      echo "#define ARCH_ALIGN_INT64" >> m.h
    fi;;
  *-*-mingw*) true;; # Nothing is in config/m-nt.h so don't add anything.
  *)
    sh ./runtest int64align.c
    case $? in
      0) inf "64-bit integers can be word-aligned."
         echo "#undef ARCH_ALIGN_INT64" >> m.h;;
      1) inf "64-bit integers must be doubleword-aligned."
         echo "#define ARCH_ALIGN_INT64" >> m.h;;
      *) wrn "Something went wrong during alignment determination for\n" \
             "64-bit integers. I'm going to assume this architecture has\n" \
             "alignment constraints. That's a safe bet: OCaml will work\n" \
             "even if this architecture has actually no alignment\n" \
             "constraints." \
         echo "#define ARCH_ALIGN_INT64" >> m.h;;
    esac
esac

# Shared library support

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

if test $with_sharedlibs = "yes"; then
  case "$target" in
    *-*-cygwin*)
      mksharedlib="$flexlink"
      mkmaindll="$flexlink -maindll"
      shared_libraries_supported=true;;
    *-*-mingw*)
      mksharedlib="$flexlink"
      mkmaindll="$flexlink -maindll"
      shared_libraries_supported=true;;
    *-*-linux-gnu|*-*-linux|*-*-freebsd[3-9]*|*-*-freebsd[1-9][0-9]*\
    |*-*-openbsd*|*-*-netbsd*|*-*-gnu*|*-*-haiku*)
      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 "$bytecc" in
        *gcc*)
          sharedcccompopts="-fPIC"
          if sh ./solaris-ld; then
            mksharedlib="ld -G"
            byteccrpath="-R"
            mksharedlibrpath="-R"
          else
            mksharedlib="$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 \
                   -Wl,-no_compact_unwind"
      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 $with_sharedlibs = "yes"; then
  case "$target" in
    *-*-cygwin*)                  natdynlink=true;;
    *-*-mingw*)                   natdynlink=true;;
    i[3456]86-*-linux*)           natdynlink=true;;
    i[3456]86-*-gnu*)             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;;
    s390x*-*-linux*)              natdynlink=true;;
    powerpc*-*-linux*)            natdynlink=true;;
    sparc*-*-linux*)              natdynlink=true;;
    i686-*-kfreebsd*)             natdynlink=true;;
    x86_64-*-kfreebsd*)           natdynlink=true;;
    i[3456]86-*-freebsd*)         natdynlink=true;;
    x86_64-*-freebsd*)            natdynlink=true;;
    i[3456]86-*-openbsd*)         natdynlink=true;;
    x86_64-*-openbsd*)            natdynlink=true;;
    i[3456]86-*-netbsd*)          natdynlink=true;;
    x86_64-*-netbsd*)             natdynlink=true;;
    i386-*-gnu0.3)                natdynlink=true;;
    i[3456]86-*-haiku*)           natdynlink=true;;
    arm*-*-linux*)                natdynlink=true;;
    arm*-*-freebsd*)              natdynlink=true;;
    earm*-*-netbsd*)               natdynlink=true;;
    aarch64-*-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 "$target" 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-*-haiku*)           arch=i386; system=beos;;
  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;;
  i[3456]86-*-mingw*)           arch=i386; system=mingw;;
  powerpc64le*-*-linux*)        arch=power; model=ppc64le; system=elf;;
  powerpc*-*-linux*)            arch=power;
                                if $arch64; then model=ppc64; else model=ppc; fi
                                system=elf;;
  powerpc-*-netbsd*)            arch=power; model=ppc; system=elf;;
  powerpc-*-openbsd*)           arch=power; model=ppc; system=bsd_elf;;
  s390x*-*-linux*)              arch=s390x; model=z10; system=elf;;
  armv6*-*-linux-gnueabihf)     arch=arm; model=armv6; system=linux_eabihf;;
  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;;
  armv6*-*-freebsd*)            arch=arm; model=armv6; system=freebsd;;
  earmv6*-*-netbsd*)		arch=arm; model=armv6; system=netbsd;;
  earmv7*-*-netbsd*)		arch=arm; model=armv7; system=netbsd;;
  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;;
  arm*-*-openbsd*)              arch=arm; system=bsd;;
  zaurus*-*-openbsd*)           arch=arm; system=bsd;;
  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;;
  x86_64-*-mingw*)              arch=amd64; system=mingw;;
  aarch64-*-linux*)             arch=arm64; system=linux;;
  x86_64-*-cygwin*)             arch=amd64; system=cygwin;;
esac

# Some platforms exist both in 32-bit and 64-bit variants, not distinguished
# by $target.  Turn off native code compilation on platforms where 64-bit mode
# is not supported  (PR#4441).
# Sometimes, it's 32-bit mode that is not supported  (PR#6722).

case "$arch64,$arch,$model" in
  true,sparc,*|true,power,ppc|false,amd64,*)
      arch=none; model=default; system=unknown;;
esac

case "$native_compiler" in
    true) ;;
    false)
      arch=none; model=default; system=unknown;;
esac

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

nativecccompopts="$bytecccompopts"
nativeccprofopts=''
nativecclinkopts=''
# FIXME the naming of nativecclinkopts is broken: these are options for
# ld (for shared libs), not for cc
nativeccrpath="$byteccrpath"

case "$arch,$nativecc,$system,$model" in
  *,*,nextstep,*)      nativecclinkopts="-posix";;
  *,*,rhapsody,*)      if $arch64; then partialld="ld -r -arch ppc64"; fi;;
  amd64,gcc*,macosx,*) partialld="ld -r -arch x86_64";;
  amd64,gcc*,solaris,*) partialld="ld -r -m elf_x86_64";;
  power,gcc*,elf,ppc)   partialld="ld -r -m elf32ppclinux";;
  power,gcc*,elf,ppc64)   partialld="ld -r -m elf64ppc";;
  power,gcc*,elf,ppc64le)   partialld="ld -r -m elf64lppc";;
esac

asppprofflags='-DPROFILING'

case "$arch,$system" in
  amd64,macosx)   if sh ./searchpath clang; then
                      as='clang -arch x86_64 -c'
                      aspp='clang -arch x86_64 -c'
                    else
                      as="${TOOLPREF}as -arch x86_64"
                      aspp="${TOOLPREF}gcc -arch x86_64 -c"
                    fi;;
  amd64,solaris)  as="${TOOLPREF}as --64"
                  aspp="${TOOLPREF}gcc -m64 -c";;
  i386,solaris)   as="${TOOLPREF}as"
                  aspp="/usr/ccs/bin/${TOOLPREF}as -P";;
  power,elf)      if $arch64; then
                    as="${TOOLPREF}as -a64 -mppc64"
                    aspp="${TOOLPREF}gcc -m64 -c"
                  else
                    as="${TOOLPREF}as -mppc"
                    aspp="${TOOLPREF}gcc -m32 -c"
                  fi;;
  s390x,elf)      as="${TOOLPREF}as -m 64 -march=$model"
                  aspp="${TOOLPREF}gcc -c -Wa,-march=$model";;
  sparc,solaris)  as="${TOOLPREF}as"
                  case "$cc" in
                    *gcc*) aspp="${TOOLPREF}gcc -c";;
                    *) aspp="${TOOLPREF}as -P";;
                  esac;;
  arm,freebsd)    as="${TOOLPREF}cc -c"
                  aspp="${TOOLPREF}cc -c";;
  *,freebsd)      as="${TOOLPREF}as"
                  aspp="${TOOLPREF}cc -c";;
  amd64,*|arm,*|arm64,*|i386,*|power,bsd*|sparc,*)
                  as="${TOOLPREF}as"
                  aspp="${TOOLPREF}gcc -c";;
esac

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

cc_profile='-pg'
case "$arch,$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,bsd) profiling='prof';;
  sparc,solaris)
    profiling='prof'
    case "$nativecc" in gcc*) ;; *) cc_profile='-xpg';; esac;;
  amd64,linux) profiling='prof';;
  amd64,openbsd) profiling='prof';;
  amd64,freebsd) profiling='prof';;
  amd64,netbsd) profiling='prof';;
  arm,netbsd) profiling='prof';;
  amd64,gnu) profiling='prof';;
  arm,linux*) profiling='prof';;
  power,elf) profiling='prof';;
  power,bsd*) profiling='prof';;
  *) profiling='noprof';;
esac

# Where is ranlib?

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

echo "ARCMD=${TOOLPREF}ar" >> Makefile


# Write the OS type (Unix or Cygwin)

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

# Do #! scripts work?

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

# 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
  inf "POSIX signal handling found."
  echo "#define POSIX_SIGNALS" >> s.h
else
  if sh ./runtest signals.c; then
    inf "Signals have the BSD semantics."
    echo "#define BSD_SIGNALS" >> s.h
  else
    inf "Signals have the System V semantics."
  fi
  if sh ./hasgot sigsetmask; then
    inf "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
  inf "expm1(), log1p(), hypot(), copysign() found."
  echo "#define HAS_C99_FLOAT_OPS" >> s.h
fi

# For the Sys module

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

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

# For the terminfo module

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

# Configuration for the libraries

case "$system" in
  mingw) unix_or_win32="win32"; unixlib="win32unix"; graphlib="win32graph";;
  *) unix_or_win32="unix"; unixlib="unix"; graphlib="graph";;
esac

echo "UNIX_OR_WIN32=$unix_or_win32" >> Makefile
echo "UNIXLIB=$unixlib" >> Makefile
echo "GRAPHLIB=$graphlib" >> Makefile

otherlibraries="$unixlib str num dynlink bigarray"

# For the Unix library

has_sockets=no
if sh ./hasgot socket socketpair bind listen accept connect; then
  inf "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
  inf "You have BSD sockets (with libraries '-lnsl -lsocket')"
  cclibs="$cclibs -lnsl -lsocket"
  echo "#define HAS_SOCKETS" >> s.h
  has_sockets=yes
elif sh ./hasgot -lnetwork socket socketpair bind listen accept connect; then
  echo "You have BSD sockets (with library '-lnetwork')"
  cclibs="$cclibs -lnetwork"
  echo "#define HAS_SOCKETS" >> s.h
  has_sockets=yes
else
  case "$target" in
    *-*-mingw*)
      inf "You have BSD sockets (with libraries '-lws2_32')"
      cclibs="$cclibs -lws2_32"
      echo "#define HAS_SOCKETS" >> s.h
      has_sockets=yes ;;
    *) ;;
  esac
fi

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

if sh ./hasgot inet_aton; then
  inf "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
  inf "IPv6 is supported."
  echo "#define HAS_IPV6" >> s.h
fi

if sh ./hasgot -i stdint.h; then
  inf "stdint.h found."
  echo "#define HAS_STDINT_H" >> s.h
fi

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

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

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

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

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

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

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

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

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

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

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

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

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

select_include=''
if sh ./hasgot -i sys/types.h -i sys/select.h; then
  inf "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
  inf "select() found."
  echo "#define HAS_SELECT" >> s.h
  has_select=yes
fi

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

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

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

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

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

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

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

if sh ./runtest async_io.c; then
  inf "Asynchronous I/O are supported."
  echo "#define HAS_ASYNC_IO" >> s.h
fi

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

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

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

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

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

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

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

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


if sh ./hasgot $dllib dlopen; then
  inf "dlopen() found."
elif sh ./hasgot $dllib -ldl dlopen; then
  inf "dlopen() found in -ldl."
  dllib="$dllib -ldl"
else
  case "$target" in
    *-*-mingw*) ;;
    *) shared_libraries_supported=false
  esac
fi

if $shared_libraries_supported; then
  inf "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
  inf "mmap() found."
  echo "#define HAS_MMAP" >> s.h
fi

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

nanosecond_stat=none
for i in 1 2 3; do
  if sh ./trycompile -DHAS_NANOSECOND_STAT=$i nanosecond_stat.c; then
      nanosecond_stat=$i; break
  fi
done
if test $nanosecond_stat != "none"; then
  inf "stat() supports nanosecond precision."
  echo "#define HAS_NANOSECOND_STAT $nanosecond_stat" >> s.h
fi

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

if sh ./hasgot mkstemp; then
  inf "mkstemp() found"
  echo "#define HAS_MKSTEMP" >> s.h
fi

if sh ./hasgot nice; then
  inf "nice() found"
  echo "#define HAS_NICE" >> s.h
fi

# Determine if the debugger is supported

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

# Determine if system stack overflows can be detected

case "$arch,$system" in
  i386,linux_elf|amd64,linux|power,rhapsody|amd64,macosx|i386,macosx \
  |amd64,openbsd|i386,bsd_elf)
    inf "System stack overflow can be detected."
    echo "#define HAS_STACK_OVERFLOW_DETECTION" >> s.h;;
  *)
    inf "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;;
  arm64)    bng_arch=arm64; 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 "$pthread_wanted" = "yes"; then
  case "$target" 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";;
    *-*-haiku*)    pthread_link=""
                   pthread_caml_link="";;
    *)             pthread_link="-lpthread"
                   pthread_caml_link="-cclib -lpthread";;
  esac
  if sh ./hasgot -i pthread.h $pthread_link pthread_self; then
    inf "POSIX threads library supported."
    systhread_support=true
    otherlibraries="$otherlibraries systhreads"
    bytecccompopts="$bytecccompopts -D_REENTRANT"
    nativecccompopts="$nativecccompopts -D_REENTRANT"
    case "$target" in
      *-*-freebsd*)
          bytecccompopts="$bytecccompopts -D_THREAD_SAFE"
          nativecccompopts="$nativecccompopts -D_THREAD_SAFE";;
      *-*-openbsd*)
          bytecccompopts="$bytecccompopts -pthread"
          asppflags="$asppflags -pthread"
          nativecccompopts="$nativecccompopts -pthread";;
    esac
    inf "Options for linking with POSIX threads: $pthread_link"
    if sh ./hasgot $pthread_link sigwait; then
      inf "sigwait() found"
      echo "#define HAS_SIGWAIT" >> s.h
    fi
  else
    inf "POSIX threads not found."
    pthread_link=""
  fi
else
  pthread_link=""
fi
echo "PTHREAD_LINK=$pthread_link" >> Makefile
echo "PTHREAD_CAML_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
  inf "Bytecode threads library supported."
  otherlibraries="$otherlibraries threads"
else
  inf "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 "$target" in
          *-kfreebsd*-gnu) x11_link="-L$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 sh ./hasgot $x11_include $x11_link -i X11/Xlib.h XrmInitialize; then
    inf "X11 works"
  else
    wrn "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
  wrn 'X11 not found, the "graph" library will not be supported.'
  x11_include="not found"
  x11_link="not found"
else
  inf "Options for compiling for X11: $x11_include"
  inf "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 BFD library

if sh ./hasgot -DPACKAGE=ocaml -i bfd.h && \
   sh ./hasgot -DPACKAGE=ocaml -lbfd -ldl -liberty -lz bfd_openr; then
  inf "BFD library found."
  echo "#define HAS_LIBBFD" >> s.h
  echo "LIBBFD_LINK=-lbfd -ldl -liberty -lz" >> Makefile
  echo LIBBFD_INCLUDE= >>Makefile
elif sh ./hasgot -DPACKAGE=ocaml -I/opt/local/include -i bfd.h && \
     sh ./hasgot -DPACKAGE=ocaml -L/opt/local/lib -lbfd -ldl \
                 -liberty -lz -lintl bfd_openr
then
  # MacOSX with binutils from MacPorts
  inf "BFD library found."
  echo "#define HAS_LIBBFD" >> s.h
  echo "LIBBFD_LINK=-L/opt/local/lib -lbfd -ldl -liberty -lz -lintl" >> Makefile
  echo LIBBFD_INCLUDE=-I/opt/local/include >>Makefile
else
  wrn "BFD library not found, 'objinfo' will be unable to display info" \
      " on .cmxs files."
  echo "LIBBFD_LINK=" >> Makefile
  echo "LIBBFD_INCLUDE=" >> Makefile
fi

# Check whether assembler supports CFI directives

asm_cfi_supported=false

export as aspp

if ! $with_cfi; then
  echo "CFI support: disabled by command-line option -no-cfi"
elif sh ./tryassemble cfi.S; then
  echo "#define ASM_CFI_SUPPORTED" >> m.h
  asm_cfi_supported=true
  inf "Assembler supports CFI"
else
  inf "Assembler does not support CFI"
fi

if test "$with_frame_pointers" = "true"; then
  case "$target,$cc" in
    x86_64-*-linux*,gcc*)
       nativecccompopts="$nativecccompopts -g  -fno-omit-frame-pointer"
       bytecccompopts="$bytecccompopts -g  -fno-omit-frame-pointer"
       nativecclinkopts="$nativecclinkopts -g"
       echo "#define WITH_FRAME_POINTERS" >> m.h
       ;;
    *) err "Unsupported architecture with frame pointers";;
  esac

fi

if $no_naked_pointers; then
  echo "#define NO_NAKED_POINTERS" >> m.h
fi

# Check for mmap support for huge pages and contiguous heap
if sh ./runtest mmap-huge.c; then
    has_huge_pages=true
    echo "#define HAS_HUGE_PAGES" >>s.h
    echo "#define HUGE_PAGE_SIZE (4 * 1024 * 1024)" >>s.h
    inf "mmap supports huge pages"
else
    has_huge_pages=false
fi

# 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=${TOOLPREF}ar rc \$(1) \$(2); ${TOOLPREF}ranlib \$(1)
#ml let mklib out files opts =
#ml   Printf.sprintf "${TOOLPREF}ar rc %s %s %s;
#ml   ${TOOLPREF}ranlib %s" out opts files out;;
EOF
echo "ARCH=$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=$otherlibraries" >> Makefile
echo "CC_PROFILE=$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=.$SO" >> Makefile
echo "EXTRALIBS=" >> Makefile
echo "CCOMPTYPE=cc" >> Makefile
echo "TOOLCHAIN=$TOOLCHAIN" >> Makefile
echo "NATDYNLINK=$natdynlink" >> Makefile
echo "CMXS=$cmxs" >> Makefile
echo "MKEXE=$mkexe" >> Makefile
echo "MKEXEDEBUGFLAG=$mkexedebugflag" >> Makefile
echo "MKDLL=$mksharedlib" >> Makefile
echo "MKMAINDLL=$mkmaindll" >> Makefile
echo "RUNTIMED=${debugruntime}" >>Makefile
if $shared_libraries_supported; then
  echo "SHARED=shared" >>Makefile
else
  echo "SHARED=noshared" >>Makefile
fi
echo "RUNTIMEI=${with_instrumented_runtime}" >>Makefile
echo "WITH_DEBUGGER=${with_debugger}" >>Makefile
echo "WITH_OCAMLDOC=${with_ocamldoc}" >>Makefile
echo "WITH_OCAMLBUILD=${with_ocamlbuild}" >>Makefile
echo "ASM_CFI_SUPPORTED=$asm_cfi_supported" >> Makefile
echo "WITH_FRAME_POINTERS=$with_frame_pointers" >> Makefile
echo "TARGET=$target" >> Makefile
echo "HOST=$host" >> Makefile
if [ "$ostype" = Cygwin ]; then
  echo "DIFF=diff -q --strip-trailing-cr" >>Makefile
fi
echo "FLAMBDA=$flambda" >> Makefile


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

# Print a summary

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

inf "Configuration for the bytecode compiler:"
inf "        C compiler used........... $bytecc"
inf "        options for compiling..... $bytecccompopts"
inf "        options for linking....... $bytecclinkopts $cclibs $dllib" \
                                       "$curseslibs $pthread_link"
if $shared_libraries_supported; then
inf "        shared libraries are supported"
inf "        options for compiling..... $sharedcccompopts $bytecccompopts"
inf "        command for building...... $mksharedlib -o lib.so" \
                                       "$mksharedlibrpath/a/path objs"
else
inf "        shared libraries not supported"
fi

inf "Configuration for the native-code compiler:"
if test "$arch" = "none"; then
  inf "        (not supported on this platform)"
else
  if test "$model" = "default"; then
    inf "        hardware architecture..... $arch"
  else
    inf "        hardware architecture..... $arch ($model)"
  fi
  if test "$system" = "unknown"; then : ; else
  inf "        OS variant................ $system"
  fi
  inf "        C compiler used........... $nativecc"
  inf "        options for compiling..... $nativecccompopts"
  inf "        options for linking....... $nativecclinkopts $cclibs"
  inf "        assembler ................ $as"
  inf "        preprocessed assembler ... $aspp"
  if test "$asm_cfi_supported" = "true"; then
  inf "        assembler supports CFI ... yes"
  else
  inf "        assembler supports CFI ... no"
  fi
  if test "$with_frame_pointers" = "true"; then
  inf "        with frame pointers....... yes"
  else
  inf "        with frame pointers....... no"
  fi
  if $no_naked_pointers; then
  inf "        naked pointers forbidden.. yes"
  else
  inf "        naked pointers forbidden.. no"
  fi
  inf "        native dynlink ........... $natdynlink"
  if test "$profiling" = "prof"; then
  inf "        profiling with gprof ..... supported"
  else
  inf "        profiling with gprof ..... not supported"
  fi
  if test "$flambda" = "true"; then
  inf "        using flambda middle-end . yes"
  else
  inf "        using flambda middle-end . no"
  fi
fi

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

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

if $with_instrumented_runtime; then
  inf "Instrumented runtime will be compiled and installed"
fi

inf "Additional libraries supported:"
inf "        $otherlibraries"

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

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

inf
inf "** OCaml configuration completed successfully **"
inf

if test ! -z "$MACOSX_DEPLOYMENT_TARGET"; then
  wrn "The environment variable MACOSX_DEPLOYMENT_TARGET is set.\n" \
      "This will probably prevent compiling the OCaml system."
fi