configure

#!/bin/bash
#
# configure
#
# This is the configure script for CodeViz to compile a patched gcc and install
# the scripts. It is meant to behave similar to ordinary configure scripts

PREFIX=/usr/local
GCCVERSION=4.6.2
GCCGRAPH=-unset-

# Print program usage
usage() {
  echo "Usage: configure [OPTION] [VAR=VALUE]"
  echo
  echo "Configuration:"
  echo "  -h, --help	    display this help and exit"
  echo "  --prefix=PREFIX   install architecture-independent files in PREFIX"
  echo "                    [Default: /usr/local]"
  echo "  --gcc=VERSION     version of gcc to use: 4.6.2 only available"
  echo "                    [Default: 4.6.2]"
  echo "  --gccgraph=PATH   install patched gcc to this path"
  echo "                    [Default: $HOME/gccgraph]"
  echo "  --perllib=PATH    Where to install the perl libraries"
  echo "                    [Default: auto-detected]"
  echo

  echo Make options are
  echo "all             Compile a patched version of gcc"
  echo "install         Install all scripts and patched version of gcc"
  echo "install-gcconly Install only the patched version of gcc"
  echo "install-codeviz Install only the codeviz scripts"
  echo
  exit
}

# Function to check a program is in the path
checkprog() {
  PROG=$1
  PACKAGE=$2
  echo -n checking for $PROG...

  TEST=`which $PROG`
  if [ "$TEST" != "" ]; then 
    echo $TEST; 
  else
    echo not found
    echo FATAL: The program $PROG was not in your path. This is probably available for your distribution
    echo "       with the $PACKAGE package. Install this before running configure again"
    echo
    exit
  fi
  
}

# Parse command line arguements
eval set -- "$@"
while true ; do
  if [ "$1" == "" ]; then break; fi 

  PARAM=`echo $1 | awk -F = '{print $1}'`
  case "$PARAM" in
    -h|--help)	    	usage;;
    --prefix)		export PREFIX=`echo $1 | awk -F = '{print $2}'`
    		       	shift;;
    --gcc)              export GCCVERSION=`echo $1 | awk -F = '{print $2}'`
                        shift;;
    --gccgraph) 	export GCCGRAPH=`echo $1 | awk -F = '{print $2}'`
    			shift;;

    --perllib)	 	export PERLLIB=`echo $1 | awk -F = '{print $2}'`
    			shift;;
    *)		  echo "Unknown option: \"$1\""; echo; usage;;
  esac
done

# Make sure prefix is valid
if [ ! -d $PREFIX ]; then
  echo An invalid prefix \($PREFIX\) was specified
  exit
fi

# Check gccgraph is going somewhere
if [ "$GCCGRAPH" = "-unset-" ]; then
  GCCGRAPH=$PREFIX/gccgraph
fi

# Check required programs are available
checkprog dot graphviz
checkprog make make
checkprog gcc gcc

# Check that dot can generate graphs
TEMP=`mktemp 2> /dev/null`
TEMPERR=`mktemp 2> /dev/null`
if [ "$TEMP" = "" ]; then
  TEMP=`mktemp -t /tmp 2> /dev/null`
  TEMPERR=`mktemp -t /tmp 2> /dev/null`
fi
echo -n checking dot can generate graphs...
echo 'digraph testgraph { node [ fontname=Helvetica, fontsize=12 ]; a->b; }' | dot -Tps > $TEMP 2> $TEMPERR
TEST=`head -1 $TEMP | grep "%!"`
if [ "$TEST" = "" ]; then
  echo no
  echo FATAL: dot does not appear to be able to generate graphs
  rm $TEMP
  rm $TMEPERR
  exit
fi
echo yes

# Get the perl library installation path
echo -n checking perl library path...
if [ "$PERLLIB" = "" ]; then
  for i in `perl -X -e 'foreach $INC (@INC) { print "$INC\n" }' 2> /dev/null`; do
    TEST=`echo $i | grep $PREFIX`
    if [ "$TEST" != "" ]; then
      export PERLLIB=$TEST
      break
    fi
  done
  
  if [ "$PERLLIB" = "" ]; then
      export PERLLIB=$PREFIX/lib
  fi
fi
echo $PERLLIB

# Create the toplevel Makefile
echo Creating Makefile
PREFIX_ESCAPED=`echo $PREFIX | sed -e 's/\//\\\\\//g'`
GCCGRAPH_ESCAPED=`echo $GCCGRAPH | sed -e 's/\//\\\\\//g'`
PERLLIB_ESCAPED=`echo $PERLLIB | sed -e 's/\//\\\\\//g'`
TOPLEVEL_ESCAPED=`pwd | sed -e 's/\//\\\\\//g'`
cat Makefile.in | \
	sed -e s/@@PREFIX@@/$PREFIX_ESCAPED/g | \
	sed -e s/@@GCCVERSION@@/$GCCVERSION/g | \
	sed -e s/@@PERLLIB@@/$PERLLIB_ESCAPED/g | \
	sed -e s/@@TOPLEVEL@@/$TOPLEVEL_ESCAPED/g | \
	sed -e s/@@GCCGRAPH@@/$GCCGRAPH_ESCAPED/g > Makefile

echo Creating testsuite/c/Makefile
cat testsuite/c/Makefile.in | \
	sed -e s/@@GCCGRAPH@@/$GCCGRAPH_ESCAPED\\/bin\\/gcc/g > testsuite/c/Makefile

echo
echo Configured. Running \"make\" will compile a patched version of gcc suitable
echo for use with codeviz. Running \"make install\" when it completes will install
echo the patched version of gcc to $GCCPATCH and the other codeviz scripts under
echo $PREFIX. When compiling other programs for use with codeviz, make sure you
echo use the patched version of gcc. For example, to build a project based on C,
echo the following should work\;
echo
echo make CC=$GCCPATCH/bin/gcc
echo
echo Configuration:
echo "   PREFIX = $PREFIX"
echo "   GCC version to patch = $GCCVERSION"
echo "   Patched GCC install path = $GCCGRAPH"
echo