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##########################################################################
#                                                                        #
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#  Copyright (C) 2010-                                                   #
#    Francois Bobot                                                      #
#    Jean-Christophe Filliatre                                           #
#    Johannes Kanig                                                      #
#    Andrei Paskevich                                                    #
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#                                                                        #
#  This software is free software; you can redistribute it and/or        #
#  modify it under the terms of the GNU Library General Public           #
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#  License version 2.1, with the special exception on linking            #
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#  described in file LICENSE.                                            #
#                                                                        #
#  This software is distributed in the hope that it will be useful,      #
#  but WITHOUT ANY WARRANTY; without even the implied warranty of        #
#  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.                  #
#                                                                        #
##########################################################################


#
# autoconf input for Objective Caml programs
# Copyright (C) 2001 Jean-Christophe Fillitre
#   from a first script by Georges Mariano 
# 
# This library is free software; you can redistribute it and/or
# modify it under the terms of the GNU Library General Public
# License version 2, as published by the Free Software Foundation.
# 
# This library is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
# 
# See the GNU Library General Public License version 2 for more details
# (enclosed in the file LGPL).

# the script generated by autoconf from this input will set the following
# variables:
#   OCAMLC        "ocamlc" if present in the path, or a failure
#                 or "ocamlc.opt" if present with same version number as ocamlc
#   OCAMLOPT      "ocamlopt" (or "ocamlopt.opt" if present), or "no"
#   OCAMLBEST     either "byte" if no native compiler was found, 
#                 or "opt" otherwise
#   OCAMLDEP      "ocamldep"
#   OCAMLLEX      "ocamllex"
#   OCAMLYACC     "ocamlyac"
#   OCAMLLIB      the path to the ocaml standard library
#   OCAMLVERSION  the ocaml version number
#   LABLGTK2	  "yes" is available, "no" otherwise
#   OCAMLWEB      "ocamlweb" (not mandatory)


# check for one particular file of the sources 
# ADAPT THE FOLLOWING LINE TO YOUR SOURCES!
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AC_INIT(src/)
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# verbosemake feature

AC_ARG_ENABLE(verbosemake,[  --enable-verbosemake    verbose makefile commands],VERBOSEMAKE=yes,VERBOSEMAKE=no)
if test "$VERBOSEMAKE" = yes ; then
	AC_MSG_RESULT(Make will be verbose.)
fi


# Check for arch/OS

AC_MSG_CHECKING(executable suffix)
if uname -s | grep -q CYGWIN ; then
  EXE=.exe
  STRIP='echo "no strip "'
  CPULIMIT=cpulimit-win
  AC_MSG_RESULT(.exe) 
else
  EXE=
  STRIP=strip
  CPULIMIT=cpulimit
  AC_MSG_RESULT(<none>)
fi

# Check for Ocaml compilers

# we first look for ocamlc in the path; if not present, we fail
AC_CHECK_PROG(OCAMLC,ocamlc,ocamlc,no)
if test "$OCAMLC" = no ; then
	AC_MSG_ERROR(Cannot find ocamlc.)
fi

# we extract Ocaml version number 
OCAMLVERSION=`$OCAMLC -v | sed -n -e 's|.*version* *\(.*\)$|\1|p' `
echo "ocaml version is $OCAMLVERSION"

case $OCAMLVERSION in
  0.*|1.*|2.00|3.00*|3.01*|3.02*|3.03*|3.04*|3.05*|3.06*|3.07*)
        AC_MSG_ERROR(You need Objective 3.08 or later);;
  3.08.2)
	FORPACK=""
	OCAMLV=3082;;
  3.08*)
	FORPACK=""
	OCAMLV=308;;
  *)
	FORPACK="-for-pack Graph";;
esac

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#Dynlink is native?
case $OCAMLVERSION in
  3.08*|3.09*|3.10*)
        DYNLINK="Dynlink_"
        enable_dynlink=no;; 
        #Dynlink_ is used for compatibility in /src/util/dynlink_compat.ml.in
  *)
        DYNLINK="Dynlink"
        enable_dynlink=yes 
esac


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# Ocaml library path
# old way: OCAMLLIB=`$OCAMLC -v | tail -1 | cut -f 4 -d ' ' | tr -d '\\r'`
OCAMLLIB=`$OCAMLC -where | tr -d '\\r'`
echo "ocaml library path is $OCAMLLIB"

# then we look for ocamlopt; if not present, we issue a warning
# if the version is not the same, we also discard it
# we set OCAMLBEST to "opt" or "byte", whether ocamlopt is available or not
AC_CHECK_PROG(OCAMLOPT,ocamlopt,ocamlopt,no)
OCAMLBEST=byte
if test "$OCAMLOPT" = no ; then
	AC_MSG_WARN(Cannot find ocamlopt; bytecode compilation only.)
else
	AC_MSG_CHECKING(ocamlopt version)
	TMPVERSION=`$OCAMLOPT -v | sed -n -e 's|.*version* *\(.*\)$|\1|p' `
	if test "$TMPVERSION" != "$OCAMLVERSION" ; then
	    AC_MSG_RESULT(differs from ocamlc; ocamlopt discarded.)
	    OCAMLOPT=no
	else
	    AC_MSG_RESULT(ok)
	    OCAMLBEST=opt
	fi
fi

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

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

# ocamldep, ocamllex and ocamlyacc should also be present in the path
AC_CHECK_PROG(OCAMLDEP,ocamldep,ocamldep,no)
if test "$OCAMLDEP" = no ; then
   AC_MSG_ERROR(Cannot find ocamldep.)
else
   AC_CHECK_PROG(OCAMLDEPDOTOPT,ocamldep.opt,ocamldep.opt,no)
   if test "$OCAMLDEPDOTOPT" != no ; then
      OCAMLDEP=$OCAMLDEPDOTOPT
   fi
fi

AC_CHECK_PROG(OCAMLLEX,ocamllex,ocamllex,no)
if test "$OCAMLLEX" = no ; then
	AC_MSG_ERROR(Cannot find ocamllex.)
else
    AC_CHECK_PROG(OCAMLLEXDOTOPT,ocamllex.opt,ocamllex.opt,no)
    if test "$OCAMLLEXDOTOPT" != no ; then
	OCAMLLEX=$OCAMLLEXDOTOPT
    fi
fi

AC_CHECK_PROG(OCAMLYACC,ocamlyacc,ocamlyacc,no)
if test "$OCAMLYACC" = no ; then
	AC_MSG_ERROR(Cannot find ocamlyacc.)
fi

AC_CHECK_PROG(OCAMLDOC,ocamldoc,ocamldoc,true)
if test "$OCAMLDOC" = true ; then
    AC_MSG_WARN(Cannot find ocamldoc)
else
    AC_CHECK_PROG(OCAMLDOCOPT,ocamldoc.opt,ocamldoc.opt,no)
    if test "$OCAMLDOCOPT" != no ; then
	OCAMLDOC=$OCAMLDOCOPT
    fi
fi

# checking for lablgtk2
AC_CHECK_FILE($OCAMLLIB/lablgtk2/lablgtk.cma,LABLGTK2=yes,LABLGTK2=no)
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AC_CHECK_FILE($OCAMLLIB/lablgtk2/lablgtksourceview2.cma,LABLGTK2=yes,LABLGTK2=no)
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# AC_CHECK_PROG(LABLGTK2,lablgtk2,yes,no) not always available (Win32)
if test "$LABLGTK2" = yes ; then
      INCLUDEGTK2="-I +lablgtk2"
fi

AC_CHECK_PROG(OCAMLWEB,ocamlweb,ocamlweb,true)

# Coq
AC_CHECK_PROG(COQC,coqc,coqc,no)
if test "$COQC" = no ; then
    COQ=no
    AC_MSG_WARN(Cannot find coqc.)
else
    COQ=yes
    AC_CHECK_PROG(COQDEP,coqdep,coqdep,true)
    if test "$COQDEP" = true ; then
	AC_MSG_ERROR(Cannot find coqdep.)
    fi
    COQLIB=`$COQC -where | sed -e 's|\\\|/|g' -e 's| |\\ |g'`
    AC_MSG_CHECKING(Coq version)
    COQVERSION=`$COQC -v | sed -n -e 's|.*version* *\([[^ ]]*\) .*$|\1|p' `

    case $COQVERSION in
    8.*|trunk)
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	AC_MSG_RESULT($COQVERSION);;
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    *)
	COQ=no
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	AC_MSG_WARN(You need Coq 8.x or later; Coq discarded);;
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    esac
fi


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#Viewer for ps and pdf
AC_CHECK_PROGS(PSVIEWER,gv evince)
AC_CHECK_PROGS(PDFVIEWER,xpdf acroread evince)

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# substitutions to perform
AC_SUBST(VERBOSEMAKE)
AC_SUBST(EXE)
AC_SUBST(STRIP)
AC_SUBST(CPULIMIT)

AC_SUBST(OCAMLC)
AC_SUBST(OCAMLOPT)
AC_SUBST(OCAMLDEP)
AC_SUBST(OCAMLLEX)
AC_SUBST(OCAMLYACC)
AC_SUBST(OCAMLDOC)
AC_SUBST(OCAMLBEST)
AC_SUBST(OCAMLVERSION)
AC_SUBST(OCAMLV)
AC_SUBST(OCAMLLIB)
AC_SUBST(OCAMLGRAPHLIB)
AC_SUBST(LABLGTK2)
AC_SUBST(INCLUDEGTK2)
AC_SUBST(OCAMLWEB)
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AC_SUBST(DYNLINK)
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AC_SUBST(FORPACK)
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AC_SUBST(COQ)
AC_SUBST(COQDEP)
AC_SUBST(COQLIB)
AC_SUBST(COQVER)

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AC_SUBST(PSVIEWER)
AC_SUBST(PDFVIEWER)
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# Finally create the Makefile from Makefile.in
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dnl AC_OUTPUT(Makefile)
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AC_CONFIG_FILES(Makefile bench/bench src/driver/dynlink_compat.ml)
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AC_OUTPUT
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chmod a-w Makefile
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chmod a-w bench/bench
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chmod a+x bench/bench
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# Summary

echo
echo "                 Summary"
echo "-----------------------------------------"
echo "OCaml version           : $OCAMLVERSION"
echo "OCaml library path      : $OCAMLLIB"
echo "Verbose make            : $VERBOSEMAKE"
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echo "Why plugin enabled      : $enable_dynlink"
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echo "Why IDE                 : $LABLGTK2"
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echo "Coq support             : $COQ"
if test "$COQ" = "yes" ; then
   echo "    Version             : $COQVER ($COQVERSION)"
   echo "    Lib                 : $COQLIB" 
fi