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dnl autoconf macros for OCaml
dnl
dnl Copyright (C) 2009      Richard W.M. Jones
dnl Copyright (C) 2009      Stefano Zacchiroli
dnl Copyright (C) 2000-2005 Olivier Andrieu
dnl Copyright (C) 2000-2005 Jean-Christophe Filliatre
dnl Copyright (C) 2000-2005 Georges Mariano
dnl
dnl For documentation, please read the ocaml.m4 man page.
dnl
dnl All rights reserved.
dnl
dnl Redistribution and use in source and binary forms, with or without
dnl modification, are permitted provided that the following conditions are
dnl met:
dnl
dnl * Redistributions of source code must retain the above copyright
dnl   notice, this list of conditions and the following disclaimer.
dnl * Redistributions in binary form must reproduce the above copyright
dnl   notice, this list of conditions and the following disclaimer in the
dnl   documentation 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''
dnl AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
dnl THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
dnl PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS
dnl BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
dnl CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
dnl SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
dnl BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
dnl WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
dnl OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
dnl IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

AC_DEFUN([AC_PROG_OCAML],
[dnl
  # checking for ocamlc
  AC_CHECK_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 $OCAMLVERSION])
     OCAMLLIB=`$OCAMLC -where 2>/dev/null || $OCAMLC -v|tail -1|cut -d ' ' -f 4`
     AC_MSG_RESULT([OCaml library path is $OCAMLLIB])

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

     # checking for ocamlopt
     AC_CHECK_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_CHECK_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 "$OCAMLOPT" != "no" ; then
	AC_CHECK_TOOL([OCAMLOPTDOTOPT],[ocamlopt.opt],[no])
	if test "$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 ocamldep
  AC_CHECK_TOOL([OCAMLDEP],[ocamldep],[no])

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

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

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

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


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

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


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

  # checking for camlp4
  AC_CHECK_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_CHECK_TOOL([CAMLP4BOOT],[camlp4boot],[no])
  AC_CHECK_TOOL([CAMLP4O],[camlp4o],[no])
  AC_CHECK_TOOL([CAMLP4OF],[camlp4of],[no])
  AC_CHECK_TOOL([CAMLP4OOF],[camlp4oof],[no])
  AC_CHECK_TOOL([CAMLP4ORF],[camlp4orf],[no])
  AC_CHECK_TOOL([CAMLP4PROF],[camlp4prof],[no])
  AC_CHECK_TOOL([CAMLP4R],[camlp4r],[no])
  AC_CHECK_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_CHECK_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

  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
      AC_MSG_RESULT([found])
      AS_TR_SH([OCAML_PKG_$1])=$pkg
      found=yes
      break
    fi
  done
  if test "$found" = "no" ; then
    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_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])
])