configure

#!/bin/bash

CC=g++
CFLAGS="-fPIC -c"
SWIG=swig
SWIGFLAGS="-c++ -python -o"
PYTHON=python
PYTHON_VERSION=
PYTHON_ROOT=
PYTHON_INCLUDE=

# Internal flags
flag_no_python=

for option
do
    case $option in

    -help | --help | -h)
        want_help=yes ;;

    -with-python=* | --with-pyton=* )
        PYTHON=`expr "x$option" : "x-*with-python=\(.*\)"`
        ;;

    -with-python-root=* | --with-python-root=* )
        PYTHON_ROOT=`expr "x$option" : "x-*with-python-root=\(.*\)"`
        ;;

    -with-python-version=* | --whith-python-version=* )
        PYTHON_VERSION=`expr "x$option" : "x-*with-python-version=\(.*\)"`
        ;;

    -*)
        { echo "error: unrecognized option: $option
            Try \`$0 --help' for more information." >&2
            { (exit 1); exit 1; }; }
        ;;

    esac
done

if test "x$want_help" = xyes; then
  cat <<EOF
\`configure' configures stein to adapt to a few kinds of systems.

Usage: $0 [OPTION]...

Defaults for the options are specified in brackets.

Configuration:
  -h, --help                display this help and exit
  --with-python=PYTHON      specify the Python executable [python]
  --with-python-root=DIR    specify the root of the Python installation
                            [automatically detected]
  --with-python-version=X.Y specify the Python version as X.Y
                            [automatically detected]

EOF
fi
test -n "$want_help" && exit 0

# Find python
if test "x$flag_no_python" = x; then
    result=`$PYTHON -c "exit" > /dev/null 2>&1`
    if [ "$?" -ne "0" ]; then
        flag_no_python=yes
    fi
fi

if test "x$flag_no_python" = x; then
    if test "x$PYTHON_VERSION" = x; then
        echo -n "Detecting Python version... "
        PYTHON_VERSION=`$PYTHON -c "import sys; print (\"%d.%d\" %
        (sys.version_info[0], sys.version_info[1]))"`
        echo $PYTHON_VERSION
    fi

    if test "x$PYTHON_ROOT" = x; then
        echo -n "Detecting Python root... "
        PYTHON_ROOT=`$PYTHON -c "import sys; print sys.prefix"`
        echo $PYTHON_ROOT
    fi
	if test "x$PYTHON_INCLUDE" = x; then
		echo -n "Detecting Python libraries... "
		if  test -e $PYTHON_ROOT/include/python$PYTHON_VERSION/Python.h; then
			PYTHON_INCLUDE="$PYTHON_ROOT/include/python$PYTHON_VERSION"
		else
			PYTHON_INCLUDE="./python"
		fi
		echo $PYTHON_INCLUDE
	fi
fi

# Generate the Makefile
echo "Generating Makefile..."
cat > Makefile <<EOF
CC=$CC
CFLAGS=$CFLAGS
SWIG=$SWIG
SWIGFLAGS=$SWIGFLAGS
PYTHON=$PYTHON
PYTHON_VERSION=$PYTHON_VERSION
PYTHON_ROOT=$PYTHON_ROOT
PYTHON_INCLUDE=$PYTHON_INCLUDE
	
all: floydwarshall
	@echo "chmod u+x stein.py"
	@chmod u+x stein.py
	
swig: .dummy
	@echo "\$(SWIG) \$(SWIGFLAGS) floydwarshall_wrap.cpp floydwarshall.i"
	@\$(SWIG) \$(SWIGFLAGS) floydwarshall_wrap.cpp floydwarshall.i
	
floydwarshall: .dummy
	@echo "\$(CC) \$(CFLAGS) floydwarshall.cpp floydwarshall_wrap.cpp -I\$(PYTHON_INCLUDE) -I\$(PYTHON_ROOT)/lib/python\$(PYTHON_VERSION)"
	@\$(CC) \$(CFLAGS) floydwarshall.cpp floydwarshall_wrap.cpp -I\$(PYTHON_INCLUDE) -I\$(PYTHON_ROOT)/lib/python\$(PYTHON_VERSION)
	@echo "\$(CC) -shared floydwarshall.o floydwarshall_wrap.o -o _floydwarshall.so"
	@\$(CC) -shared floydwarshall.o floydwarshall_wrap.o -o _floydwarshall.so
	
clean: .dummy
	rm -f *.pyc *.o *.so
	
distclean: clean
	rm -f Makefile
	
.dummy:
	
.PHONY: clean distclean
	
EOF