#!/bin/sh

## $Id$

## ---------- some portability checks/adjustments [stolen from configure] ----------
## 'echo -n' is not portable..
case `echo "testing\c"; echo 1,2,3`,`echo -n testing; echo 1,2,3` in
  *c*,-n*) ECHO_N= ECHO_C='
' ECHO_T='	' ;;
  *c*,*  ) ECHO_N=-n ECHO_C= ECHO_T= ;;
  *)       ECHO_N= ECHO_C='\c' ECHO_T= ;;
esac
##----------

## ----------------------------------------------------------------------
## Check that given command $1 has version >= $2.$3
## return 0 if ok, 1 too old or not found  (-> shell conventions).
## ----------------------------------------------------------------------
check_version()
{  
    dir=`pwd`
    cd /tmp
    foundit=
    ## get current version of $1
    desired=`echo $2 | awk -F. '{print $1*100+$2}'`
    echo $ECHO_N "Checking version of '$1' >= $desired... $ECHO_C"
    name=$1
    fullpath=`type $name | awk '{ print $(NF) }'`;
    if [ -x "$fullpath" ]; then
	foundit=yes;
    fi

    if [ "$foundit" != yes ]; then 
	echo "Didn't find application";
	version=0
	success=no
    else
	cmdline="$fullpath --version";
	if version=`($cmdline 2>/dev/null)` 2>/dev/null; then
	    echo >/dev/null
	else
	    version="0";
	fi
	if [ -n "${version}" ]; then
	    version=`echo $version | awk '{ for (i=1;i<=NF;i++) { split($i,j,"."); m=j[1]*100+j[2] ; if ((m*1)>0) { print m ; break; } } }'`
	    if [ -z "$version" ]; then version=0; fi
	    success=`echo "$version" "$desired" | awk '{ if ($1 >= $2) { print "yes";} else {print "no";}} '`
	else
	    version=0
	    success=no
	fi
    fi
    cd $dir

    if [ $success = "yes" ] ; then
      echo "succeeded. ($version)"
      return 0;
    else
      echo "failed. ($version)"
      return 1;
    fi
} ## check_version()


  ## --------------------------------------------------------------------------------
  ## 'MAIN' starts here 
  ## --------------------------------------------------------------------------------
  echo "Bootstrapping configure script and makefiles:"

  ## ---------- first check santity of the installed versions of the build-system
  ## in case there's GNU drop-in tools available, set these

  ## some sorry systems don't have proper GNU-make...
  if check_version make 3.79; then
      echo >/dev/null
  else
      if check_version gmake 3.79; then
	  have_gmake=yes;
      else
	echo "Couldn't find a new-enough version of GNU 'make', please install one!";
	exit 1;
      fi
  fi

  ## FreeBSD's m4 seems to be broken? Download a fresh one
  if check_version m4 1.4; then
      echo >/dev/null
  else
      ## solaris m4 works fine
      if test -f /usr/ccs/bin/m4
      then
         echo >/dev/null
      elif check_version gm4 1.4; then
         have_gm4=yes;
      else 
         echo "Couldn't find a new-enough version of 'm4', please install one!";
         exit 1;
      fi
      # build_lsc_aux "m4-1.4.1"
  fi

  if check_version pkg-config 0.15; then
      echo >/dev/null
  else
      echo "Couldn't find a new-enough version of 'pkg-config', please install one!";
      exit 1;
      # build_lsc_aux "pkgconfig-0.15.0"
  fi

  if check_version autoconf 2.58; then
      echo >/dev/null
  else
      echo "Couldn't find a new-enough version of 'autoconf', please install one!";
      echo "If you have a newer version, set the environment-variable 'AUTOCONF' to its path";
      exit 1;
      # build_lsc_aux "autoconf-2.59"
  fi
  if check_version automake 1.8; then
      echo >/dev/null
  else
      echo "Couldn't find a new-enough version of 'automake', please install one!";
      echo "If you have a newer version, set the environment-variable 'AUTOMAKE' to its path";
      exit 1;
      # build_lsc_aux "automake-1.8.5"
  fi

  ## ---------- ok, now run aclocal, automake, autohead and autoconf
  cmdline="aclocal -I m4 && autoheader && automake && autoconf";
echo "$cmdline"
if eval $cmdline; then
    echo "Done, now run ./configure"
    echo " ./configure -C                         to enable caching"
    exit 0
else
    echo "Something failed .... please check error-message and re-run when fixed."
    echo "exiting..."
    exit 1
fi