dnl autoconf macros for OCaml
dnl
dnl Copyright © 2013      Gabriel Kerneis
dnl Copyright © 2009      Richard W.M. Jones
dnl Copyright © 2009      Stefano Zacchiroli
dnl Copyright © 2000-2005 Olivier Andrieu
dnl Copyright © 2000-2005 Jean-Christophe Filliâtre
dnl Copyright © 2000-2005 Georges Mariano
dnl
dnl
dnl Redistribution and use in source and binary forms, with or without modification,
dnl are permitted provided that the following conditions are met:
dnl
dnl * Redistributions of source code must retain the above copyright notice, this
dnl list of conditions and the following disclaimer.
dnl * Redistributions in binary form must reproduce the above copyright notice,
dnl this list of conditions and the following disclaimer in the documentation
dnl and/or other materials provided with the distribution.
dnl * The names of the contributors may not be used to endorse or promote
dnl products derived from this software without specific prior written
dnl permission.
dnl
dnl THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ''AS IS'' AND ANY
dnl EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
dnl WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
dnl DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE FOR ANY
dnl DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
dnl (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
dnl LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
dnl ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
dnl (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
dnl SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
dnl
dnl
dnl For documentation, please read the ocaml.m4 man page.

AC_DEFUN([AC_PROG_OCAML],
[dnl
  # checking for ocamlc
  AC_PATH_TOOL([OCAMLC],[ocamlc],[no])

  if test "$OCAMLC" != "no"; then
     OCAMLVERSION=`$OCAMLC -v | sed -n -e 's|.*version* *\(.*\)$|\1|p'`
     AC_MSG_RESULT([OCaml version is $OCAMLVERSION])
     # If OCAMLLIB is set, use it
     if test "$OCAMLLIB" = ""; then
        OCAMLLIB=`$OCAMLC -where 2>/dev/null | tr -d '\015' || $OCAMLC -v|tail -1|cut -d ' ' -f 4`
     else
        AC_MSG_RESULT([OCAMLLIB previously set; preserving it.])
     fi
     AC_MSG_RESULT([OCaml library path is $OCAMLLIB])

     AC_SUBST([OCAMLVERSION])
     AC_SUBST([OCAMLLIB])

     # checking for ocamlopt
     AC_PATH_TOOL([OCAMLOPT],[ocamlopt],[no])
     OCAMLBEST=byte
     if test "$OCAMLOPT" = "no"; then
        AC_MSG_WARN([Cannot find ocamlopt; bytecode compilation only.])
     else
        TMPVERSION=`$OCAMLOPT -v | sed -n -e 's|.*version* *\(.*\)$|\1|p' `
        if test "$TMPVERSION" != "$OCAMLVERSION" ; then
           AC_MSG_RESULT([versions differs from ocamlc; ocamlopt discarded.])
           OCAMLOPT=no
        else
           OCAMLBEST=opt
        fi
     fi

     AC_SUBST([OCAMLBEST])

     # checking for ocamlc.opt
     AC_PATH_TOOL([OCAMLCDOTOPT],[ocamlc.opt],[no])
     if test "$OCAMLCDOTOPT" != "no"; then
        TMPVERSION=`$OCAMLCDOTOPT -v | sed -n -e 's|.*version* *\(.*\)$|\1|p' `
        if test "$TMPVERSION" != "$OCAMLVERSION" ; then
           AC_MSG_RESULT([versions differs from ocamlc; ocamlc.opt discarded.])
        else
           OCAMLC=$OCAMLCDOTOPT
        fi
     fi

     # checking for ocamlopt.opt
     if test "$OCAMLOPT" != "no" ; then
        AC_PATH_TOOL([OCAMLOPTDOTOPT],[ocamlopt.opt],[no])
        if test "$OCAMLOPTDOTOPT" != "no"; then
           TMPVERSION=`$OCAMLOPTDOTOPT -v | sed -n -e 's|.*version* *\(.*\)$|\1|p' `
           if test "$TMPVERSION" != "$OCAMLVERSION" ; then
              AC_MSG_RESULT([version differs from ocamlc; ocamlopt.opt discarded.])
           else
              OCAMLOPT=$OCAMLOPTDOTOPT
           fi
       fi
     fi

     AC_SUBST([OCAMLOPT])
  fi

  AC_SUBST([OCAMLC])

  # checking for native dynlink
  AC_MSG_CHECKING([for dynlink.cmxa])
  if test -f "$OCAMLLIB/dynlink.cmxa" ; then
     OCAMLNATDYNLINK=yes
     AC_MSG_RESULT([yes])
  else
     OCAMLNATDYNLINK=no
     AC_MSG_RESULT([no])
  fi

  AC_SUBST([OCAMLNATDYNLINK])

  # checking for ocaml toplevel
  AC_PATH_TOOL([OCAML],[ocaml],[no])

  # checking for ocamldep
  AC_PATH_TOOL([OCAMLDEP],[ocamldep],[no])

  # checking for ocamlmktop
  AC_PATH_TOOL([OCAMLMKTOP],[ocamlmktop],[no])

  # checking for ocamlmklib
  AC_PATH_TOOL([OCAMLMKLIB],[ocamlmklib],[no])

  # checking for ocamldoc
  AC_PATH_TOOL([OCAMLDOC],[ocamldoc],[no])

  # checking for ocamlbuild
  AC_PATH_TOOL([OCAMLBUILD],[ocamlbuild],[no])
])


AC_DEFUN([AC_PROG_OCAMLLEX],
[dnl
  # checking for ocamllex
  AC_PATH_TOOL([OCAMLLEX],[ocamllex],[no])
  if test "$OCAMLLEX" != "no"; then
     AC_PATH_TOOL([OCAMLLEXDOTOPT],[ocamllex.opt],[no])
     if test "$OCAMLLEXDOTOPT" != "no"; then
        OCAMLLEX=$OCAMLLEXDOTOPT
     fi
  fi
  AC_SUBST([OCAMLLEX])
])

AC_DEFUN([AC_PROG_OCAMLYACC],
[dnl
  AC_PATH_TOOL([OCAMLYACC],[ocamlyacc],[no])
  AC_SUBST([OCAMLYACC])
])


AC_DEFUN([AC_PROG_CAMLP4],
[dnl
  AC_REQUIRE([AC_PROG_OCAML])dnl

  # checking for camlp4
  AC_PATH_TOOL([CAMLP4],[camlp4],[no])
  if test "$CAMLP4" != "no"; then
     TMPVERSION=`$CAMLP4 -v 2>&1| sed -n -e 's|.*version *\(.*\)$|\1|p'`
     if test "$TMPVERSION" != "$OCAMLVERSION" ; then
        AC_MSG_RESULT([versions differs from ocamlc])
        CAMLP4=no
     fi
  fi
  AC_SUBST([CAMLP4])

  # checking for companion tools
  AC_PATH_TOOL([CAMLP4BOOT],[camlp4boot],[no])
  AC_PATH_TOOL([CAMLP4O],[camlp4o],[no])
  AC_PATH_TOOL([CAMLP4OF],[camlp4of],[no])
  AC_PATH_TOOL([CAMLP4OOF],[camlp4oof],[no])
  AC_PATH_TOOL([CAMLP4ORF],[camlp4orf],[no])
  AC_PATH_TOOL([CAMLP4PROF],[camlp4prof],[no])
  AC_PATH_TOOL([CAMLP4R],[camlp4r],[no])
  AC_PATH_TOOL([CAMLP4RF],[camlp4rf],[no])
  AC_SUBST([CAMLP4BOOT])
  AC_SUBST([CAMLP4O])
  AC_SUBST([CAMLP4OF])
  AC_SUBST([CAMLP4OOF])
  AC_SUBST([CAMLP4ORF])
  AC_SUBST([CAMLP4PROF])
  AC_SUBST([CAMLP4R])
  AC_SUBST([CAMLP4RF])
])


AC_DEFUN([AC_PROG_FINDLIB],
[dnl
  AC_REQUIRE([AC_PROG_OCAML])dnl

  # checking for ocamlfind
  AC_PATH_TOOL([OCAMLFIND],[ocamlfind],[no])
  AC_SUBST([OCAMLFIND])
])


dnl Thanks to Jim Meyering for working this next bit out for us.
dnl XXX We should define AS_TR_SH if it's not defined already
dnl (eg. for old autoconf).
AC_DEFUN([AC_CHECK_OCAML_PKG],
[dnl
  AC_REQUIRE([AC_PROG_FINDLIB])dnl

  dnl NOTE: commented out, see ac_check_ocaml_pkg_path.m4
  dnl AC_MSG_CHECKING([for OCaml findlib package $1])

  unset found
  unset pkg
  found=no
  for pkg in $1 $2 ; do
    if $OCAMLFIND query $pkg >/dev/null 2>/dev/null; then
       dnl NOTE: commented out, see ac_check_ocaml_pkg_path.m4
       dnl AC_MSG_RESULT([found])
       AS_TR_SH([OCAML_PKG_$1])=$pkg
       found=yes
       break
    fi
  done
  if test "$found" = "no" ; then
     dnl NOTE: commented out, see ac_check_ocaml_pkg_path.m4
     dnl AC_MSG_RESULT([not found])
     AS_TR_SH([OCAML_PKG_$1])=no
  fi

  AC_SUBST(AS_TR_SH([OCAML_PKG_$1]))
])


AC_DEFUN([AC_CHECK_OCAML_MODULE],
[dnl
  AC_MSG_CHECKING([for OCaml module $2])

  cat > conftest.ml <<EOF
open $3
EOF
  unset found
  for $1 in $$1 $4 ; do
    if $OCAMLC -c -I "$$1" conftest.ml >&5 2>&5 ; then
       found=yes
       break
    fi
  done

  if test "$found" ; then
     AC_MSG_RESULT([$$1])
  else
     AC_MSG_RESULT([not found])
     $1=no
  fi
  AC_SUBST([$1])
])


dnl XXX Cross-compiling
AC_DEFUN([AC_CHECK_OCAML_WORD_SIZE],
[dnl
  AC_REQUIRE([AC_PROG_OCAML])dnl
  AC_MSG_CHECKING([for OCaml compiler word size])
  cat > conftest.ml <<EOF
  print_endline (string_of_int Sys.word_size)
EOF
  OCAML_WORD_SIZE=`$OCAML conftest.ml`
  AC_MSG_RESULT([$OCAML_WORD_SIZE])
  AC_SUBST([OCAML_WORD_SIZE])
])

AC_DEFUN([AC_CHECK_OCAML_OS_TYPE],
[dnl
  AC_REQUIRE([AC_PROG_OCAML])dnl
  AC_MSG_CHECKING([OCaml Sys.os_type])

  cat > conftest.ml <<EOF
  print_string(Sys.os_type);;
EOF

  OCAML_OS_TYPE=`$OCAML conftest.ml`
  AC_MSG_RESULT([$OCAML_OS_TYPE])
  AC_SUBST([OCAML_OS_TYPE])
])