dnl Process this file with autoconf to produce a configure script.
AC_INIT(cdl.h)


dnl Checks for programs.
#--------------------------------------------------------------------
#	See if there was a command-line option for where Python libs are;  
#	if not, assume that we are in site-packages.
#--------------------------------------------------------------------
AC_PROG_CC

AC_ARG_WITH(python, [  --with-python=DIR          provide Python LIBs directory],
	PYTHON_LIB_DIR=$withval, PYTHON_LIB_DIR=`cd ../../..; pwd`)
if test ! -d $PYTHON_LIB_DIR; then
    AC_MSG_ERROR(PYTHON LIB directory $PYTHON_LIB_DIR doesn't exist)
fi
if test ! -d $PYTHON_LIB_DIR/site-packages; then
    AC_MSG_ERROR(There's no site-packages in $PYTHON_LIB_DIR;  perhaps you didn't specify the Python *build* directory (but the Python *source* dir?))
fi

AC_SUBST(PYTHON_LIB_DIR)

# Check whether to use gcc

AC_ARG_WITH(gcc,   [--with-gcc         allow for use of gcc if available],
       CC=gcc, gcc_ok=no)

if test "$gcc_ok" = "no"; then
    AC_PROG_CC
fi

if test "$CC" = "gcc"; then
    SHLIB_CFLAGS=-fPIC
    AC_SUBST(SHLIB_CFLAGS)
fi

#------------------------------------------------------------------
#	Read site specific information, kept in site.config
#	There are two ways to read the config.site file: --prefix 
#	and the two lines below
#------------------------------------------------------------------


AC_SUBST(pyraf_dir)
pyraf_dir=`cd $srcdir; cd ../; pwd`
file=$srcdir/config.site
. $file

#-----------------------------------------------------------------
#	Paths to where various header files are kept
#-----------------------------------------------------------------
AC_SUBST(PYTHONVERSION)

AC_SUBST(PythonIncludePath)
PythonIncludePath=`cd $PYTHON_LIB_DIR; cd ../../include/python$PYTHONVERSION; pwd`

AC_SUBST(PythonBin)
PYTHONBIN=`cd $PythonIncludePath; cd ../../; pwd`
PythonBin=$PYTHONBIN/bin/python$PYTHONVERSION

AC_SUBST(OpenGLIncludePath)	
AC_SUBST(TclIncludePath)

#-----------------------------------------------------------------
#	Paths to where various libraries are located 
#-----------------------------------------------------------------
dnl Checks for libraries.

AC_SUBST(TclLibPath)

dnl Checks for header files.
AC_PATH_X
AC_SUBST(x_includes)
AC_SUBST(x_libraries)
AC_HEADER_STDC

dnl Checks for typedefs, structures, and compiler characteristics.
AC_C_CONST


dnl Checks for library functions.
AC_CHECK_FUNCS(strtod)

#--------------------------------------------------------------------
#	Find what the host system is and define IRAFARCH
#	SHLIB_CFLAGS - flags to pass to CC when compiling the components 
#	of a shared library
#--------------------------------------------------------------------
#AC_SUBST(IRAFARCH)
AC_MSG_CHECKING(platform)
if test -z "$IRAFPLAT"
then
	system=`uname -s`-`uname -r`
	AC_MSG_RESULT($system)
else AC_MSG_RESULT($system)
fi
case $system in
    SunOS-5.*)	
        IRAFARCH="ssun"
	toglplatform="sunos"
	CFLAGS="-c"
	EXTRA_LFLAGS="-lnsl -lsocket"
	LDFLAG='-G'
	;;
    Linux*)
        IRAFARCH="redhat"
	toglplatform="linux"
	CFLAGS=" -c" 
	EXTRA_LFLAGS="-lc"
        LDFLAG='-shared'
        ;;
    OSF1-V*)
        IRAFARCH="alpha"
	toglplatform="osf1"
	CFLAGS=" -c"
        LDFLAG='-shared -expect_unresolved "*"'
	EXTRA_LFLAGS=""
        ;;
esac

if test "$CC" != "gcc"
then
case $system in
    SunOS-5.*)  
        SHLIB_CFLAGS="-KPIC"
        ;;
    Linux*)
        SHLIB_CFLAGS="-fPIC"
        ;;
    OSF1-V*)
        SHLIB_CFLAGS=""
        ;;
esac
fi

AC_SUBST(ToglPath)
ToglPath=`cd $PYTHON_LIB_DIR/site-packages/OpenGL/Tk*/$toglplatform*; pwd`

AC_SUBST(CFLAGS)
AC_SUBST(EXTRA_LFLAGS)
AC_SUBST(LDFLAG)
AC_SUBST(SHLIB_CFLAGS)

AC_OUTPUT(Makefile ../pyraf)