dnl
dnl AM_PATH_MOLECUILDER(MINIMUM-VERSION, [HAVE_DEBUG=no,yes,full], [ACTION-IF-FOUND [, ACTION-IF-NOT-FOUND]])
dnl

AC_DEFUN([AM_PATH_MOLECUILDER],
[
AC_REQUIRE([AX_BOOST_THREAD])

AC_ARG_WITH(molecuilder,[  --with-molecuilder=PFX   Prefix where MoleCuilder is installed (optional)],
            molecuilder_prefix="$withval", molecuilder_prefix="")
AC_ARG_WITH(molecuilder_include,[  --with-molecuilder_include=INCLUDE   Where MoleCuilder' includes are installed (optional)],
            molecuilder_include_prefix="$withval", molecuilder_include_prefix="")
AC_ARG_WITH(cp_cv_molecuilder_libs,[  --with-cp_cv_molecuilder_libs=LIBPATH   Where MoleCuilder' libs are installed (optional)],
            cp_cv_molecuilder_libs_prefix="$withval", cp_cv_molecuilder_libs_prefix="")

  molecuilder_version_min=$1
  molecuilder_debug=$2

  MoleCuilder_CFLAGS=""
  MoleCuilder_LIBS=""
  MoleCuilder_LDFLAGS=""

 
  molecuilder_pkgconfig=""
  # try to set PKG_CONFIG_PATH
  if test x$molecuilder_prefix != xno; then
    if test -z $PKG_CONFIG_PATH; then
      export PKG_CONFIG_PATH="$molecuilder_prefix/lib/pkgconfig/"
    else
      export PKG_CONFIG_PATH="$molecuilder_prefix/lib/pkgconfig/:$PKG_CONFIG_PATH"
    fi
  fi
  # 1. test whether pkg-config works
  MoleCuilder_CONFIG="no"
  #AC_MSG_NOTICE([PKG_CONFIG_PATH is $PKG_CONFIG_PATH.])
  if test x$molecuilder_debug != xno; then
    molecuilder_libname="MoleCuilder-debug"
    PKG_CHECK_MODULES([MoleCuilder_debug], [MoleCuilder >= $molecuilder_version_min], [
      molecuilder_pkgconfig=yes
      MoleCuilder_CONFIG="pkg-config $molecuilder_libname"
    ], [
    # 2. if failed, test for binary molecuilder-config
      AC_PATH_PROG(MoleCuilder_CONFIG, molecuilder-config, no)
      if test "x$MoleCuilder_CONFIG" = xno && test x$molecuilder_prefix != x ; then
        AC_MSG_CHECKING([for alternative molecuilder-config location])
        if test -e $molecuilder_prefix/bin/molecuilder-config; then
          molecuilder_pkgconfig=no
          MoleCuilder_CONFIG="$molecuilder_prefix/bin/molecuilder-config"
          AC_MSG_RESULT([yes])
        else
          AC_MSG_RESULT([no])
        fi
      fi
    ])

  else
    molecuilder_libname="MoleCuilder"
    PKG_CHECK_MODULES([MoleCuilder], [MoleCuilder >= $molecuilder_version_min], [
      molecuilder_pkgconfig=yes
      MoleCuilder_CONFIG="pkg-config $molecuilder_libname"
    ], [
    # 2. if failed, test for binary molecuilder-config
      AC_PATH_PROG(MoleCuilder_CONFIG, molecuilder-config, no)
      if test "x$MoleCuilder_CONFIG" = xno && test x$molecuilder_prefix != x ; then
        AC_MSG_CHECKING([for alternative molecuilder-config location])
        if test -e $molecuilder_prefix/bin/molecuilder-config; then
          molecuilder_pkgconfig=no
          MoleCuilder_CONFIG="$molecuilder_prefix/bin/molecuilder-config"
          AC_MSG_RESULT([yes])
        else
          AC_MSG_RESULT([no])
        fi
      fi
    ])

  fi

  # try to set values via MoleCuilder_CONFIG
  if test "x$MoleCuilder_CONFIG" != xno; then 
    MoleCuilder_CFLAGS=`$MoleCuilder_CONFIG --cflags`
    if test x$molecuilder_pkgconfig = xno; then
      MoleCuilder_LIBS=`$MoleCuilder_CONFIG --ldflags --libs`
    else
      MoleCuilder_LIBS=`$MoleCuilder_CONFIG --libs`
    fi
    #AC_MSG_NOTICE([molecuilder-config found and used.])
  fi

  # else set by hand (or rather by --with..)
  if test x$molecuilder_include_prefix != x ; then
    if test -e $molecuilder_include_prefix/include; then
      MoleCuilder_CFLAGS="$molecuilder_include_prefix/include"
      #AC_MSG_NOTICE([molecuilder include found and used.])
    else
      AC_MSG_WARN([molecuilder include not found at $molecuilder_include_prefix/include.])
    fi
  fi
  if test x$cp_cv_molecuilder_libs_prefix != x ; then
    if test -e "$cp_cv_molecuilder_libs_prefix/lib/lib$molecuilder_libname.so"; then
      MoleCuilder_LIBS="-L$cp_cv_molecuilder_libs_prefix/lib -l$molecuilder_libname"
      #AC_MSG_NOTICE([molecuilder libs found and used.])
    else
      AC_MSG_WARN([molecuilder libs not found at $cp_cv_molecuilder_libs_prefix.])
    fi
  fi

  molecuilder="no"
  if test "x$MoleCuilder_CFLAGS" != "x"; then
    if test "x$MoleCuilder_LIBS" != "x"; then
      molecuilder="yes"
    fi
  fi


  if test x$molecuilder_pkgconfig != xyes; then
    # check version of lib
    no_molecuilder=""
    molecuilder_version=no
    if test x$molecuilder = xyes; then
      AC_MSG_CHECKING(for $molecuilder_libname - version >= $molecuilder_version_min)
      if test "x$MoleCuilder_CONFIG" != xno; then
        molecuilder_version=`$MoleCuilder_CONFIG --version`
      else
        molecuilder_version=""
      fi
  
      molecuilder_major_version=`echo $molecuilder_version | \
             sed 's/\([[0-9]]*\).\([[0-9]]*\).\([[0-9]]*\)/\1/'`
      molecuilder_minor_version=`echo $molecuilder_version | \
             sed 's/\([[0-9]]*\).\([[0-9]]*\).\([[0-9]]*\)/\2/'`
      molecuilder_micro_version=`echo $molecuilder_version | \
             sed 's/\([[0-9]]*\).\([[0-9]]*\).\([[0-9]]*\)/\3/'`
  
      #AC_MSG_NOTICE([Version found is: $molecuilder_major_version.$molecuilder_minor_version.$molecuilder_micro_version])
      #AC_MSG_NOTICE([Version required is: $molecuilder_version_min])
  
      molecuilder_major_min=`echo $molecuilder_version_min | \
             sed 's/\([[0-9]]*\).\([[0-9]]*\).\([[0-9]]*\)/\1/'`
      if test "x${molecuilder_major_min}" = "x" ; then
         molecuilder_major_min=0
      fi
      
      molecuilder_minor_min=`echo $molecuilder_version_min | \
             sed 's/\([[0-9]]*\).\([[0-9]]*\).\([[0-9]]*\)/\2/'`
      if test "x${molecuilder_minor_min}" = "x" ; then
         molecuilder_minor_min=0
      fi
  
      molecuilder_micro_min=`echo $molecuilder_version_min | \
             sed 's/\([[0-9]]*\).\([[0-9]]*\).\([[0-9]]*\)/\3/'`
      if test "x${molecuilder_micro_min}" = "x" ; then
         molecuilder_micro_min=0
      fi
  
      if test $molecuilder_major_version -lt $molecuilder_major_min; then
        molecuilder_version_proper=0
      fi
      if test $molecuilder_major_version -gt $molecuilder_major_min; then
        molecuilder_version_proper=1
      else
        if test $molecuilder_minor_version -lt $molecuilder_minor_min; then
          molecuilder_version_proper=0
        fi
        if test $molecuilder_minor_version -gt $molecuilder_minor_min; then
          molecuilder_version_proper=1
        else
          if test $molecuilder_micro_version -ge $molecuilder_micro_min; then
            molecuilder_version_proper=1
          else 
            molecuilder_version_proper=0
          fi
        fi
      fi
      #AC_MSG_NOTICE([$molecuilder_version_proper])
      
      if test $molecuilder_version_proper = 1 ; then
        molecuilder_version=yes
        AC_MSG_RESULT([$molecuilder_major_version.$molecuilder_minor_version.$molecuilder_micro_version])
      else
        AC_MSG_RESULT(no)
        molecuilder_version=no
      fi
    fi
  else
    # with pkg-config version is checked
    molecuilder_version=yes
  fi
  # check presence of lib
  SAVE_CPPFLAGS="$CPPFLAGS"
  SAVE_LIBS="$LIBS"
  CPPFLAGS="$MoleCuilder_CFLAGS"
  LIBS="$MoleCuilder_LIBS -lboost_thread"
  if test x$molecuilder_version = xyes; then
    AC_CACHE_CHECK(for $molecuilder_libname lib, cp_cv_molecuilder_lib, [
      AC_LANG_PUSH([C++])
      AC_LINK_IFELSE(
        [
          AC_LANG_PROGRAM([
#include "LinearAlgebra/Vector.hpp"
], [
  Vector test;
  test.Norm();
])
        ],[
          cp_cv_molecuilder_lib="yes"
        ], [
          cp_cv_molecuilder_lib="no"
        ]
      )
      AC_LANG_POP([C++])
    ])
  fi
  CPPFLAGS="$SAVE_CPPFLAGS"
  LIBS="$SAVE_LIBS"

  if test "x$cp_cv_molecuilder_lib" = xyes ; then
    ifelse([$3], , :, [$3])
  else
     MoleCuilder_CFLAGS=""
     MoleCuilder_LDFLAGS=""
     MoleCuilder_LIBS=""
     ifelse([$4], , :, [$4])
  fi
  
  AC_SUBST(MoleCuilder_CFLAGS)
  AC_SUBST(MoleCuilder_LDFLAGS)
  AC_SUBST(MoleCuilder_LIBS)
])