dnl Copyright (C) 2004-2006 EDF
dnl
dnl This file is part of the FVM software package.  For license
dnl information, see the LICENSE file in the top level directory of the
dnl FVM source distribution.

# FVM_AC_TEST_BFT
#----------------
# Check for BFT version

AC_DEFUN([FVM_AC_TEST_BFT], [

AC_ARG_WITH(bft-prefix,
  [  --with-bft-prefix=DIR   BFT installed under DIR]
)

if test "x$with_bft_prefix" != "x" ; then
  BFT_CPPFLAGS="-I$with_bft_prefix/include"
  BFT_LDFLAGS="-L$with_bft_prefix/lib"
  bft_config="$with_bft_prefix/bin/bft-config"
else
  BFT_CPPFLAGS=""
  BFT_LDFLAGS=""
  bft_config="bft-config"
fi
BFT_LIBS="-lbft"

type "$bft_config" > /dev/null 2>&1
if test "$?" = "0" ; then
  BFT_CPPFLAGS="$BFT_CPPFLAGS `$bft_config --cppflags-user`"
  BFT_LDFLAGS="$BFT_LDFLAGS `$bft_config --ldflags-user`"
  BFT_LIBS="$BFT_LIBS `$bft_config --libs`"
fi

bft_version_min=$1
bft_version_max=$2

if test "x$bft_version_min" != "x" ; then
  if test "x$bft_version_max" != "x" ; then
    AC_MSG_CHECKING([for bft version >= $1 and <= $2])
  else
    AC_MSG_CHECKING([for bft version >= $1])
  fi
else
  bft_version_min="0.0.0"
fi

[
cat > conftest.c <<EOF
#include <stdlib.h>
#include <stdio.h>
#include <bft_config.h>
static void _extract_version(char *s, int v[3])
{
  int level, i, j, l;
  for (l = 0 ; s[l] != '\0'; l++);
  i = 0;
  for (level = 0 ; level < 3 ; level++) {
    for (j = i ; s[j] != '.' && j <l ; j++);
    s[j] = '\0';
    if (i >= l)
      v[level] = 0;
    else
      v[level] = atoi(s + i);
    i = j+1;
  }
}
int main(int argc, char **argv)
{
  int level, v_min[3], v_max[3], v_bft[3];
  char *s_min, *s_max;
  if (argc < 2) {
    printf("usage : %s min_version_string [max_version_string]\n", argv[0]);
    return 1;
  }
  v_bft[0] = BFT_MAJOR_VERSION;
  v_bft[1] = BFT_MINOR_VERSION;
  v_bft[2] = BFT_RELEASE_VERSION;
  s_min = argv[1];
  _extract_version(s_min, v_min);
  for (level = 0 ; level < 3 ; level++)
    if (v_min[level] > v_bft[level]) return 1;
  if (argc == 3) {
    s_max = argv[2];
    _extract_version(s_max, v_max);
    for (level = 0 ; level < 3 ; level++)
      if (v_max[level] < v_bft[level]) return 1;
  }
  return 0;
}
EOF
]

CPPFLAGS="${CPPFLAGS} $BFT_CPPFLAGS"
LDFLAGS="${LDFLAGS} $BFT_LDFLAGS"
LIBS="${LIBS} $BFT_LIBS"

echo "$CC $CPPFLAGS $CFLAGS $LDFLAGS $LIBS -o conftest conftest.c" 1>&5 2>&1
$CC $CPPFLAGS $CFLAGS $LDFLAGS $LIBS -o conftest conftest.c 1>&5 2>&1

./conftest $bft_version_min $bft_version_max
if test -s conftest && (./conftest $bft_version_min $bft_version_max; exit) 2>/dev/null
then
  AC_MSG_RESULT([compatible bft version found])
else
  if test "x$bft_version_max" != "x" ; then
    AC_MSG_FAILURE([bft version >= $1 and <= $2 not found])
  else
    AC_MSG_FAILURE([bft version >= $1 not found])
  fi
fi

/bin/rm -f conftest*])dnl

unset bft_version_min
unset bft_version_max
unset bft_config

])dnl