dnl	This file is an input file used by the GNU "autoconf" program to
dnl	generate the file "configure", which is run during Tk installation
dnl	to configure the system for the local environment.

AC_INIT(../generic/itk.h)
# RCS: $Id: configure.in,v 1.4 1999/07/13 20:40:02 gporter Exp $

ITCL_VERSION=3.0
ITCL_MAJOR_VERSION=3
ITCL_MINOR_VERSION=0
ITCL_RELEASE_LEVEL=1
VERSION=${ITCL_VERSION}

AC_CONFIG_AUX_DIR(../../config)
AC_PREREQ(2.0)

# -----------------------------------------------------------------------
#   Set up a new default --prefix.  If a previous installation of
#   [incr Tcl] can be found searching $PATH use that directory.
# -----------------------------------------------------------------------

AC_PREFIX_DEFAULT(/usr/local)
AC_PREFIX_PROGRAM(tclsh)

if test "${prefix}" = "NONE"; then
    prefix=/usr/local
fi
if test "${exec_prefix}" = "NONE"; then
    exec_prefix=$prefix
fi

AC_PROG_INSTALL
AC_PROG_RANLIB

# -----------------------------------------------------------------------
BUILD_DIR=`pwd`
ITK_SRC_DIR=`cd $srcdir/..; pwd`
cd ${BUILD_DIR}

AC_ARG_ENABLE(gcc, [  --enable-gcc            allow use of gcc if available],
    [itk_ok=$enableval], [itk_ok=no])
if test "$itk_ok" = "yes"; then
    AC_PROG_CC
else
    CC=${CC-cc}
AC_SUBST(CC)
fi
AC_PROG_CPP

#--------------------------------------------------------------------
#   See if there was a command-line option for where Tcl is;  if
#   not, search for Tcl.
#--------------------------------------------------------------------

AC_ARG_WITH(tcl, [  --with-tcl=DIR          use Tcl 8.1 binaries from DIR],
        itcl_search=$withval, itcl_search=`cd ../../..; ls -d \`pwd\`/tcl8.1*/unix`)

TCL_LIB_DIR=""
for dir in $exec_prefix/lib $itcl_search ; do
    if test -r $dir/tclConfig.sh; then
        TCL_LIB_DIR=$dir
        break
    fi
done

if test -z "$TCL_LIB_DIR"; then
    AC_MSG_ERROR(Can't find Tcl libraries.  Use --with-tcl to specify the directory containing tclConfig.sh on your system.)
fi

#--------------------------------------------------------------------
#   Read in configuration information generated by Tcl for shared
#   libraries, and arrange for it to be substituted into our
#   Makefile.
#--------------------------------------------------------------------

file=$TCL_LIB_DIR/tclConfig.sh
. $file
CFLAGS=$TCL_CFLAGS
SHLIB_CFLAGS=$TCL_SHLIB_CFLAGS
SHLIB_LD=$TCL_SHLIB_LD
SHLIB_LD_LIBS=$TCL_SHLIB_LD_LIBS
SHLIB_SUFFIX=$TCL_SHLIB_SUFFIX
DL_LIBS=$TCL_DL_LIBS
LD_FLAGS=$TCL_LD_FLAGS
LD_SEARCH_FLAGS=$TCL_LD_SEARCH_FLAGS

#--------------------------------------------------------------------
#   Make sure that we can find the Tcl sources, so we can include
#   the "tclInt.h" file.
#--------------------------------------------------------------------

if test ! -d "$TCL_SRC_DIR"; then
    AC_MSG_ERROR(Can't find Tcl source directory "$TCL_SRC_DIR".  Itcl can't be built without this directory.)
fi

#--------------------------------------------------------------------
#   See if there was a command-line option for where Tk is;  if
#   not, search for Tk.
#--------------------------------------------------------------------

AC_ARG_WITH(tk, [  --with-tk=DIR           use Tk 8.1 binaries from DIR],
        itcl_search=$withval, itcl_search=`cd ../../..; ls -d \`pwd\`/tk8.1*/unix`)

TK_LIB_DIR=""
for dir in $exec_prefix/lib $itcl_search ; do
    if test -r $dir/tkConfig.sh; then
        TK_LIB_DIR=$dir
        break
    fi
done

if test -z "$TK_LIB_DIR"; then
    AC_MSG_ERROR(Can't find Tk libraries.  Use --with-tk to specify the directory containing tkConfig.sh on your system.)
fi

file=$TK_LIB_DIR/tkConfig.sh
. $file

#--------------------------------------------------------------------
#   See if there was a command-line option for where [incr Tcl] is.
#   If not, assume that its top-level directory is a sibling of ours.
#--------------------------------------------------------------------

AC_ARG_WITH(itcl, [  --with-itcl=DIR          use Itcl 3.0 binaries from DIR],
        ITCL_LIB_DIR=$withval, ITCL_LIB_DIR=`cd ../../itcl/unix; pwd`)

if test ! -r "$ITCL_LIB_DIR/itclConfig.sh"; then
    AC_MSG_ERROR(Can't find Itcl libraries.  Have you built Itcl yet?  Use --with-itcl to specify the directory containing itclConfig.sh on your system.)
fi

file=$ITCL_LIB_DIR/itclConfig.sh
. $file

#--------------------------------------------------------------------
#   If this is gcc, add some extra compile flags.
#--------------------------------------------------------------------

AC_MSG_CHECKING([whether C compiler is gcc])
AC_CACHE_VAL(itcl_cv_prog_gcc,
    AC_EGREP_CPP(_cc_is_gcc_, [
#ifdef __GNUC__
_cc_is_gcc_
#endif
],      [itcl_cv_prog_gcc=yes], [itcl_cv_prog_gcc=no]))
AC_MSG_RESULT([$itcl_cv_prog_gcc])

if test -z "$CFLAGS" ; then
    CFLAGS="-O"
fi
if test "$itcl_cv_prog_gcc" = "yes" ; then
    CFLAGS="$CFLAGS -Wshadow -Wtraditional -Wall"
fi

AC_MSG_CHECKING([default compiler flags])
AC_ARG_WITH(cflags, [  --with-cflags=FLAGS     set compiler flags to FLAGS],
    [CFLAGS="$with_cflags"])

AC_MSG_RESULT([$CFLAGS])

if test "$TCL_CC" != "$CC" ; then
    echo ""
    echo "WARNING:  Compiler is $CC but Tcl was compiled with $TCL_CC"
    echo ""
fi

#--------------------------------------------------------------------
#   The statements below define a collection of symbols related to
#   building libitk as a shared library instead of a static library.
#--------------------------------------------------------------------

AC_ARG_ENABLE(shared,
    [  --enable-shared         build libitk as a shared library],
    [ok=$enableval], [ok=no])
if test "$ok" = "yes"; then
    if test ${TCL_SHARED_BUILD} = 0; then
        AC_MSG_ERROR(Tcl was not built with --enable-shared, so you can't use shared libraries.)
    fi
    SHLIB_CFLAGS="${SHLIB_CFLAGS}"
    eval "ITK_LIB_FILE=libitk${TCL_SHARED_LIB_SUFFIX}"
    ITK_PKG_FILE="[[file join [file dirname \$dir] ${ITK_LIB_FILE}]]"
    MAKE_LIB="\$(SHLIB_LD) -o ${ITK_LIB_FILE} \$(OBJS) ${SHLIB_LD_LIBS} \$(LD_SEARCH_FLAGS)"
    RANLIB=":"
else
    SHLIB_CFLAGS=""
    eval "ITK_LIB_FILE=libitk${TCL_UNSHARED_LIB_SUFFIX}"
    ITK_PKG_FILE=""
    MAKE_LIB="ar cr ${ITK_LIB_FILE} \${OBJS}"
fi

# Note:  in the following variable, it's important to use the absolute
# path name of the Tcl directory rather than "..":  this is because
# AIX remembers this path and will attempt to use it at run-time to look
# up the Tcl library.

if test "${TCL_LIB_VERSIONS_OK}" = "ok"; then
    ITK_BUILD_LIB_SPEC="-L`pwd` -litk${VERSION}"
    ITK_LIB_SPEC="-L${exec_prefix}/lib -litk${VERSION}"
else
    ITK_BUILD_LIB_SPEC="-L`pwd` -litk`echo ${VERSION} | tr -d .`"
    ITK_LIB_SPEC="-L${exec_prefix}/lib -litk`echo ${VERSION} | tr -d .`"
fi

AC_SUBST(CFLAGS)
AC_SUBST(DL_LIBS)
AC_SUBST(LD_FLAGS)
AC_SUBST(MAKE_LIB)
AC_SUBST(SHLIB_CFLAGS)
AC_SUBST(SHLIB_LD)
AC_SUBST(SHLIB_LD_LIBS)
AC_SUBST(SHLIB_SUFFIX)
AC_SUBST(LD_SEARCH_FLAGS)

AC_SUBST(TCL_VERSION)
AC_SUBST(TCL_SRC_DIR)
AC_SUBST(TCL_LIB_SPEC)
AC_SUBST(TCL_LIB_FLAG)
AC_SUBST(TCL_DBGX)
AC_SUBST(TCL_DEFS)
AC_SUBST(TCL_LIBS)
AC_SUBST(TCL_SHLIB_LD_LIBS)
AC_SUBST(TCL_SHLIB_SUFFIX)
AC_SUBST(TCL_COMPAT_OBJS)

AC_SUBST(TK_VERSION)
AC_SUBST(TK_BUILD_LIB_SPEC)
AC_SUBST(TK_LIB_DIR)
AC_SUBST(TK_LIB_SPEC)
AC_SUBST(TK_LIB_FLAG)
AC_SUBST(TK_XINCLUDES)
AC_SUBST(TK_XLIBSW)
AC_SUBST(TK_SRC_DIR)

AC_SUBST(ITCL_VERSION)
AC_SUBST(ITCL_MAJOR_VERSION)
AC_SUBST(ITCL_MINOR_VERSION)
AC_SUBST(ITCL_RELEASE_LEVEL)
AC_SUBST(ITCL_BUILD_LIB_SPEC)
AC_SUBST(ITCL_LIB_DIR)
AC_SUBST(ITCL_LIB_SPEC)
AC_SUBST(ITCL_PKG_FILE)
AC_SUBST(ITCL_SRC_DIR)

AC_SUBST(ITK_BUILD_LIB_SPEC)
AC_SUBST(ITK_LIB_FILE)
AC_SUBST(ITK_LIB_SPEC)
AC_SUBST(ITK_PKG_FILE)
AC_SUBST(ITK_SRC_DIR)

AC_OUTPUT(Makefile pkgIndex.tcl itkConfig.sh)
