dnl --*- sh -*--
##xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx##
## This file is part of ANTLR. See LICENSE.txt for licence  ##
## details. Written by W. Haefelinger                       ##
##                                                          ##
## ...............Copyright (C) Wolfgang Haefelinger, 2004  ##
##                                                          ##
##xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx##

## Process this file with autoconf to produce a configure
## script.
AC_INIT(antlr, 2.7.7)
AC_CONFIG_SRCDIR([LICENSE.txt])
AC_CONFIG_AUX_DIR(scripts)

## This shall be the very first config file. Do not change
## this.
AC_CONFIG_FILES([scripts/config.vars])
AC_CONFIG_FILES([scripts/config.deps])
AC_CONFIG_FILES([scripts/config.make])

AC_CONFIG_FILES([antlr/Version.java])

AC_SUBST_FILE([stdvars])
AC_SUBST_FILE([stddeps])
AC_SUBST_FILE([stdmake])

## ANTLR's core libraries for each supporte language. The variable
## in  uppercase letters denotes the absolute name of the library.
## When in  lower  cases  letters - see below - the variable just
## holds the basename.
AC_SUBST([ANTLR_JAR])
AC_SUBST([ANTLR_LIB])
AC_SUBST([ANTLR_NET])
AC_SUBST([ANTLR_PY])
AC_SUBST([ASTFRAME_NET])

AC_SUBST([antlr_jar])
AC_SUBST([antlr_lib])
AC_SUBST([antlr_net])
AC_SUBST([antlr_py])
AC_SUBST([astframe_net])

AC_SUBST([ANTLRFLAGS])
AC_SUBST([ANTLR])
AC_SUBST([ANTLR_ACTION_FILES])
AC_SUBST([ANTLR_ANTLR_FILES])
AC_SUBST([ANTLR_COMPILE_CMD])
AC_SUBST([ANTLR_CYGWIN])
AC_SUBST([ANTLR_MINGW])
AC_SUBST([ANTLR_TOKDEF_FILES])
AC_SUBST([ANTLR_WIN32])
AC_SUBST([ANTLR_WITH_ANTLR_CMD])
AC_SUBST([ANTLR_WITH_ANTLR_JAR])
AC_SUBST([ARFLAGS])
AC_SUBST([AR])
AC_SUBST([AS])
AC_SUBST([BOOTCLASSPATH])
AC_SUBST([CSHARPCFLAGS])
AC_SUBST([CSHARPC])
AC_SUBST([CSHARP_COMPILE_CMD])
AC_SUBST([CLR])
AC_SUBST([CXX_COMPILE_CMD])
AC_SUBST([CXX_LIB_CMD])
AC_SUBST([CXX_LINK_CMD])
AC_SUBST([CYGPATH])
AC_SUBST([C_COMPILE_CMD])
AC_SUBST([DEBUG])
AC_SUBST([EXEEXT])
AC_SUBST([JARFLAGS])
AC_SUBST([JAR])
AC_SUBST([JAR_CMD])
AC_SUBST([JAVACFLAGS])
AC_SUBST([JAVAC])
AC_SUBST([JAVAFLAGS])
AC_SUBST([JAVA])
AC_SUBST([JAVA_CMD])
AC_SUBST([JAVA_COMPILE_CMD])
AC_SUBST([LIBEXT])
AC_SUBST([MAKE])
AC_SUBST([OBJEXT])
AC_SUBST([PATCHLEVEL])
AC_SUBST([PYTHONFLAGS])
AC_SUBST([PYTHON])
AC_SUBST([SUBVERSION])
AC_SUBST([TIMESTAMP])
AC_SUBST([TOUCH])
AC_SUBST([VERBOSE])
AC_SUBST([VERSION])
AC_SUBST([WITH_EXAMPLES])
AC_SUBST([abs_this_builddir])
AC_SUBST([cxx])
AC_SUBST([jar])
AC_SUBST([java])
AC_SUBST([javac])
AC_SUBST([TAR])
AC_SUBST([RMF])
AC_SUBST([CP])
AC_SUBST([ECHO])
AC_SUBST([FIND])
# create strong named assemblies [true|false(*)]
AC_SUBST([STRONGNAME])
# file containing public/private key pair for creating strong named
# assemblies (no default value)
AC_SUBST([KEYFILE])
# Allow partially trusted callers (C#)
AC_SUBST([APTC])


## introduce package information as autoconf vars.
VERSION=`echo $PACKAGE_VERSION | cut -d . -f 1`
SUBVERSION=`echo $PACKAGE_VERSION | cut -d . -f 2`
PATCHLEVEL=`echo $PACKAGE_VERSION | cut -d . -f 3`
TIMESTAMP=`date +%Y%m%d`

## @abs_this_builddir@  - absolute path to top of build directory.
## According to GNU autoconf we can rely on that there's a proper
## pwd around.
abs_this_builddir=`pwd`

## This is how we compile Java files ..
JAVA_COMPILE_CMD="/bin/sh $abs_this_builddir/scripts/javac.sh"

## This is how we run Java ..
JAVA_CMD="/bin/sh $abs_this_builddir/scripts/java.sh"

## This is how we pack Java (class) files ..
JAR_CMD="/bin/sh $abs_this_builddir/scripts/jar.sh"

## And this is how we are going to compile ANTLR grammar files ..
ANTLR_COMPILE_CMD="/bin/sh $abs_this_builddir/scripts/antlr.sh"

## This is how we compile CSHARP files ..
CSHARP_COMPILE_CMD="/bin/sh $abs_this_builddir/scripts/csc.sh"

## This is how we compile C++ files and how we are going to create
## libantlr.a or antlr.lib etc. ..

CXX_COMPILE_CMD="/bin/sh $abs_this_builddir/scripts/cxx.sh"
CXX_LIB_CMD="/bin/sh $abs_this_builddir/scripts/lib.sh"
CXX_LINK_CMD="/bin/sh $abs_this_builddir/scripts/link.sh"

C_COMPILE_CMD="/bin/sh $abs_this_builddir/scripts/c.sh"

ANTLR_JAR="$abs_this_builddir/antlr/antlr.jar"
ANTLR_NET="$abs_this_builddir/lib/antlr.runtime.dll"
ASTFRAME_NET="$abs_this_builddir/lib/antlr.astframe.dll"
ANTLR_PY="$abs_this_builddir/lib/python/antlr/python.py"

## Note: values might be overriden in C++ section.
OBJEXT=".o"
LIBEXT=".a"
ANTLR_LIB="$abs_this_builddir/lib/cpp/src/libantlr.a"

stdvars="scripts/config.vars"
stddeps="scripts/config.deps"
stdmake="scripts/config.make"

##
## option --enable-java
##
AX_ARG_ENABLE(
  [java],
  [LANG_JAVA],
  [enable or disable ANTLR for Java (enabled)],
  [1],
)

##
## option --enable-cxx
##
AX_ARG_ENABLE(
  [cxx],
  [LANG_CXX],
  [enable or disable ANTLR for C++ (enabled)],
  [1],
)

##
## option --enable-python
##
AX_ARG_ENABLE(
  [python],
  [LANG_PY],
  [enable or disable ANTLR for Python (enabled).],
  [1],
)

##
## option --enable-csharp
##
AX_ARG_ENABLE(
  [csharp],
  [LANG_CS],
  [enable or disable ANTLR for C# (enabled)],
  [1],
)

##
## option --enable-verbose=<level>
##
AX_ARG_ENABLE(
  [verbose],
  [VERBOSE],
  [turn on verbosity when building package.],
  [0],
)

##
## option --enable-debug=<level>
##
AX_ARG_ENABLE(
  [debug],
  [DEBUG],
  [set debug level - any value greater zero enables a debug version],
  [0],
)

##
## option --enable-examples
##

WITH_EXAMPLES=1

AX_ARG_ENABLE(
  [examples],
  [WITH_EXAMPLES],
  [include examples into this configuration (enabled)],
  [1],
)

##
## option --enable-allow-partially-trusted-callers
##

APTC=1

AX_ARG_ENABLE(
  [allow-partially-trusted-callers],
  [APTC],
  [allow partially trusted callers (C#)],
  [1],
)

case $APTC in
  0) APTC=false ;;
  *) APTC=true  ;;
esac
    

##
## option --with-antlr-jar
##
ANTLR_WITH_ANTLR_JAR=""

AC_ARG_WITH(
  [antlr-jar],
  [AC_HELP_STRING(
      [--with-antlr-jar=ARG],
      [use given file (antlr.jar) to bootstrap])
    ],[
    if test -n "${ANTLR_WITH_ANTLR_CMD}" ; then
      opts="--with-antlr-jar,--with-antlr-cmd"
      AC_MSG_ERROR(
        [this configuration options mutually exclusive: $opts])
    fi
    ANTLR_WITH_ANTLR_JAR="${withval}"]
)

##
## option --with-antlr-cmd
##
ANTLR_WITH_ANTLR_CMD=""

AC_ARG_WITH(
  [antlr-cmd],
  [AC_HELP_STRING(
      [--with-antlr-cmd=ARG],
      [use given command to compile ANTLR grammar files while bootstrapping..])
    ],[
    if test -n "${ANTLR_WITH_ANTLR_JAR}" ; then
      opts="--with-antlr-jar,--with-antlr-cmd"
      AC_MSG_ERROR(
        [this configuration options mutually exclusive: $opts])
    fi
    ANTLR_WITH_ANTLR_CMD="${withval}"
  ]
)

##
## option --with-strong-assemblies
##
STRONGNAME=false
KEYFILE=

AC_ARG_WITH(
  [strong-assemblies],
  [AC_HELP_STRING(
      [--with-strong-assemblies=ARG],
      [enable strong named assemblies by passing a keyfile holding a public/private key pair (only useful when building C#)])
    ],[
    STRONGNAME=true
    KEYFILE="${withval}"
  ]
)

AC_ARG_WITH(
  [bootclasspath],
  [AC_HELP_STRING(
      [--with-bootclasspath=ARG],
      [use this option to set bootclasspath when using jikes. ARG is a white
        space seperated list of absolute file or directory names, typically
        /opt/jdk1.3/jre/lib/rt.jar. In most cases this option is not requird
        as configure tries to detect rt.jar itself. If configure fails or
        detects the wrong boot library you may use this option. Note that
        this option is only used when using jikes.
        ])
    ],[
    BOOTCLASSPATH="${withval}"
  ]
)

AX_ARG_WITH(
  [cxx],
  [CXX],
)

AX_ARG_WITH(
  [make],
  [MAKE],
)

AX_ARG_WITH(
  [java],
  [JAVA],
)

AX_ARG_WITH(
  [javac],
  [JAVAC],
)

AX_ARG_WITH(
  [jar],
  [JAR],
)

AX_ARG_WITH(
  [python],
  [PYTHON],
)

AX_ARG_WITH(
  [csharpc],
  [CSHARPC],
)

#xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx#
#                     S T A R T   T E S T S                          #
#xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx#

# get host_os set
AC_CANONICAL_HOST

# Detect cygwin or mingw
ANTLR_CYGWIN=no
ANTLR_MINGW=no

AC_MSG_CHECKING(whether this is Cygwin)
case $host_os in
   *cygwin* )
    ANTLR_CYGWIN=yes
    ;;
  *)
    AC_MSG_RESULT(no)
  ;;
esac

AC_MSG_CHECKING(whether this is MinGW)
case $host_os in
   *mingw* )
    ANTLR_MINGW=yes
    ;;
  *)
    AC_MSG_RESULT(no)
  ;;
esac

## Set common file extensions depending on OS we are running on.
## File extensions depend on C++/C compiler in use. This values
## are just guesses and redefined further below.

case "${host_os}" in
  *mingw*|*cygwin*)
    OBJEXT=".o"
    LIBEXT=".a"
    EXEEXT=".exe"
    ;;
  *)
    OBJEXT=".o"
    LIBEXT=".a"
    EXEEXT=""
    ;;
esac

## Test whether we have cygpath
test -z "$CYGPATH"    && AC_PATH_PROGS(CYGPATH, cygpath$EXEEXT )

AC_SUBST([CYGPATH_M])
AC_SUBST([CYGPATH_W])

if test -n "$CYGPATH" ; then
  CYGPATH_M="${CYGPATH} -m"
  CYGPATH_W="${CYGPATH} -w"
else
  CYGPATH_M="echo"
  CYGPATH_W="echo"
fi

AC_ARG_VAR(
  [ANTLRFLAGS],
  [Use environment variable ANTLRFLAGS to pass some extra flags to antlr
   when compiling grammar (*.g) files.
  ]
)

AX_PATH_PROGS([CP],  [/bin/cp   /usr/bin/cp   cp])
AX_PATH_PROGS([ECHO],[/bin/echo /usr/bin/echo echo])
AX_PATH_PROGS([FIND],[/bin/find /usr/bin/find find])

AX_VAR_HEAD([CP])
AX_VAR_HEAD([ECHO])
AX_VAR_HEAD([FIND])

#xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx#
#                             MAKE                                   #
#xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx#
## Check whether there's a make program around. We search for a
## couple of well know names within $PATH. A user may skip this
## search by providing variable $MAKE.
AC_ARG_VAR(
  [MAKE],
  [By default we search for "make", "gmake" and "gnumake" in your PATH
   as well as "/bin/make" and "/usr/bin/make". You may  override  this
   search by  using  enviromnent variable $MAKE.  Note that a GNU make
   is required to build this package. However,  when  providing   your
   own candidate a check for GNU make is skipped and all bets are on.
  ]
)

## @MAKE@ shall contain absolut path name of make program found.

## Search for well known make programs - take user given MAKE
## into account. The result will be a list of valid make prog-
## grams found and will be stored in variable MAKE.
user_make="${MAKE}"
AX_PATH_PROGS(
  [MAKE],
  [make gmake gnumake /bin/make /usr/bin/make]
)

## right now we need to have a GNU make around, other makes are
## not supported and likely to fail.
if test "x${user_make}" == "x" ; then
  AX_GNU_MAKE(
    [MAKE],
    [AC_MSG_ERROR( [package requires GNU make])]
  )
fi

## we lookup 'make' in PATH. If the one found is not the same
## as the configured one we issue a warning message.
AC_PATH_PROGS([just_make],[make],[%])

case "${just_make}" in
  ${MAKE})
    ;;
  *)
    AC_CONFIG_COMMANDS([notice],[
        AC_MSG_NOTICE([
 ---------------------------------------------------------
                   * WARNING *

  This package has been configured to be build by using

   $MAKE

  It is very likely that just running "make" from  the
  command line will fail. Please remember therefore to
  use the configured version.
 =========================================================
          ])
        ],[
        MAKE="${MAKE}"
      ]
    )
  ;;
esac

#xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx#
#                             JAVA                                   #
#xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx#
## @JAVAC@ shall contain absolut path name of javac program and
## similar to  CXXFLAGS, @JAVACFLAGS@ shall contain all options
## required to compile JAVA source files.

AC_ARG_VAR(
  [JAVAC],
  [By default we search for "jikes", "javac" and "gcj" in your $PATH
   on how to comile Java source files.  You may override this search
   by using enviromnent variable $JAVAC. JAVAC may contain a list of
   candidates, either as absolute path names or as a relative one.
   In case a relative name is given, a search  in $PATH will take
   place, otherwise the absolute name is tried.
  ]
)
AC_ARG_VAR(
  [JAVACFLAGS],
  [Environment variable JAVACFLAGS can be used to change or override
   all flags required to compile Java source files. Note that
   JAVACFLAGS understands the following:
   "+ flag1 flag2 .." append  "flag1 flag2 .." to precomputed list
   "- flag1 flag2 .." prepend "flag1 flag2 .." to precomputed list
   "= flag1 flag2 ..   override with flag1 flag2 ..". If there is
   a need to hardwire additional flags then edit scripts/javac.sh.in
   and run "CONFIG_FILES=scripts/javac.sh ./config.status" again.
  ]
)
## @JAVA@ shall contain absolut path name of java  program and
## similar to  CXXFLAGS, @JAVAFLAGS@ shall contain all options
## required to run JAVA class files.

AC_ARG_VAR(
  [JAVA],
  [By default we search for "java" and "gij" in your PATH on how
   to run Java class files. You may override this search by
   using enviromnent variable $JAVA. JAVA may contain a list of
   candidates, either as absolute path name or as a relative one.
   In case of a relative name, a search in $PATH will take place.
   Otherwise the absolute name will be accepted if existing.
  ]
)
AC_ARG_VAR(
  [JAVAFLAGS],
  [Shall contain all flags required to run Java class files.
   You may override by using environment variable JAVAFLAGS.
  ]
)

AX_JAVA_PROGS(
  [JAVA],
  [java gij],
  [AX_VAR_HEAD([JAVA])]
)
AX_JAVA_PROGS(
  [JAVAC],
  [jikes javac gcj],
  [AX_VAR_HEAD([JAVAC])]
)
AX_JAVA_PROGS(
  [JAR],
  [fastjar jar],
  [
    AX_VAR_HEAD([JAR])
  ]
)

case $LANG_JAVA in
  1)
    jar="`basename $JAR`"
    jar="`echo ${jar}|sed 's,\..*$,,'`"

    ## This macro tries to determine which javac compiler is
    ## being used. Well  known  compilers are gcj, jikes and
    ## javac. A unknown compiler is treated as  if javac has
    ## been  given  in  the  very, very naive  hope that all
    ## javac compiler have at least the same  options as the
    ## original, ie. javac.
    ## If your compiler is not in the list  and does not be-
    ## have like javac, then you need  to  extend this macro
    ## by writing a specialized test.
    AX_WHICH_JAVAC([javac])
    ## Jikes cannot live without having a Java around. Have
    ## therefore a look into  Java  installations found for
    ## a 'rt.jar'.
    test -n "${BOOTCLASSPATH}" && {
      for f in ${BOOTCLASSPATH} ; do
        AC_MSG_CHECKING([bootclasspath \"$f\"])
        test -f "${f}" -o -d "${f}" || {
          AC_MSG_RESULT([does not exist])
          AC_MSG_ERROR(
            [
===================================================================
Please check arguments given to
  --with-bootclasspath
 or
  \${BOOTCLASSPATH}
Each argument must be a valid file or directory. Use whitespace to
seperate your args.
===================================================================
          ])
        }
        AC_MSG_RESULT([good])
      done
    }
    test -z "${BOOTCLASSPATH}" && {
      case "${javac}" in
        jikes)
          BOOTCLASSPATH=""
          set x ${JAVA}
          while test $# -gt 1 ; do
            x="$2" ; shift
            d=`dirname $x`
            test -d "$d" || continue
            d=`(cd $d && cd .. && pwd)`
            test -d "$d" || continue
            test -f "$d/jre/lib/rt.jar" && {
              BOOTCLASSPATH="$d/jre/lib/rt.jar"
              ## we need to try whether jikes accept .. (tbd)
              break
            }
            test -f "$d/lib/rt.jar" && {
              BOOTCLASSPATH="$d/lib/rt.jar"
              ## we need to try whether jikes accept .. (tbd)
              break
            }
          done
          ## go for some unusual locations (MacOS)
          test -z "${BOOTCLASSPATH}" && {
            fwdir=/System/Library/Frameworks/JavaVM.framework/Versions
            for x in 1.4.1 1.3.1 ; do
              if test -f "$fwdir/$x/Classes/classes.jar" ; then
                BOOTCLASSPATH="$fwdir/$x/Classes/classes.jar"
                break
              fi
            done
          }
          ## give up in case we can't set.
          test -z "${BOOTCLASSPATH}" && {
            AC_MSG_ERROR(
              [Unable to set BOOTCLASSPATH - there is no rt.jar around.])
          }
          ;;
        *)
          BOOTCLASSPATH=""
          ;;
      esac
    }
    test -n "${BOOTCLASSPATH}" && {
      ## Finalize BOOTCLASSPATH. Depending on platform join arguments using
      ## a different seperator.
      case $build_os in
        cygwin)
          sep=";"
          ;;
        *)
          sep=":"
          ;;
      esac
      set x $BOOTCLASSPATH ; shift
      BOOTCLASSPATH="$1"
      shift
      while test $# -gt 0 ; do
        BOOTCLASSPATH="${BOOTCLASSPATH}${sep}${1}"
        shift
      done
    }
    ## Use Java first in list.
    AX_VAR_HEAD([JAVA])

    ;;
esac

#xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx#
#                             C++                                    #
#xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx#

case $LANG_CXX in
  1)
    AX_PATH_PROGS(
      [AR],
      [tlib lib ar /usr/bin/ar]
    )
    ## Try to figure out what C++ compiler shall be used. Note that CC
    ## clashes on cygwin. While CC is usually SUN's C++ compiler name,
    ## CC is also present on Cygwin - it's just an alias for gcc. The
    ## real alias is  actually  'cc'  but  names  are searched in non-
    ## sensitive manner. To solve this problem we  use  kind  of  hack
    ## here and list compilers availabe to known operating systems.
    case $build_os in
      cygwin*|mingw*)
        ## On Cygwin/Microsoft we are aware of Borland C++, Microsoft
        ## C++ and GNU.
        cxx_compiler_list="bcc32 cl g++"
		  # FIXME: for bcc32
		  c_compiler_list="cl gcc"
        ;;
      *)
        ## On other platforms we now HP C++ (aCC), IBM C++ (xlC*) and
        ## of  course GNU. If there's a GNU compiler around we prefer
        ## GNU. This avoids also  a  problem  with  vendors having CC
        ## a symbolic link to "gcc" instead of "g++".
        cxx_compiler_list="g++ aCC CC xlC xlC_r cxx c++"
		  # FIXME: for other unix flavours
		  c_compiler_list="cc gcc xlc_r acc"
        ;;
    esac

    ## Find a compiler for me. If compiler is not in list you can al-
    ## ways override by using environment varialbe CXX.
    AC_PROG_CXX([${cxx_compiler_list}])
    AC_PROG_CC([${c_compiler_list}])

    ## just  overrule what autoconf figured out - we never asked for
    ## this anyway. Our  handling  of compiler options is done below
    ## in the fine tuning section.
    CXXFLAGS=""

    ## 'cxx'  shall  be  the canonical compiler name. For example, gcc
    ## cl, bcc, CC, etc. Note that this is in general not equal to CXX.
    ## For example, CYGWIN  appears to have c++ as name for g++ and cc
    ## as alias for gcc.
    ## CXX is used to call the compiler, 'cxx' shall be used for
    ## decisions based on compiler in use.
    cxx=""

    if test "x$GXX" = xyes; then
      cxx="gcc"
    else
      cxx=`basename $CXX`
      cxx=`echo ${cxx}|sed 's,\.@<:@^.@:>@*$,,'`
    fi

    case ${cxx} in
      gcc*)
        cxx='gcc'
        ;;
      cl*|CL*)
        cxx='cl'
        ## check whether this is Microsoft C++ (tbd)
        ;;
      bcc32*|BCC32*)
        cxx='bcc32'
        ## check whether this is Borland C++ (tbd)
        ;;
      CC*)
        ## check whether this is SUN C++ (tbd)
        cxx="CC"
        ;;
      xlC*|xlC_r*)
        cxx="xlC"
        ## check whether this is IBM C++ (tbd)
        ;;
      aCC*)
        cxx='aCC'
        ## check whether this is HP C++ (tbd)
        ;;
      cxx*)
        cxx='cxx'
        ## check for Digital UNIX cxx (Tru64)??
        ;;
      *)
        ## unknown compiler - good luck.
        AX_MSG_UNKOWN_CXX
        ;;
    esac

    ##xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx##
    ##                  COMPILER TUNING SECTION                     ##
    ##==============================================================##

    ## compiler tuning has basically removed from this configure
    ## script as it appears not  to  be handy and practical. All
    ## compiler flags  are  set  in  cxx.sh.in.  If there is any
    ## change required, go there and change.
    ## Note that flags  given in this file may overrule settings
    ## given in cxx.sh.in. Therefore, if you "add" flags here,
    ## put a "+" in front of variable CXXFLAGS. For example, let's
    ## say you want to add "-g". Then do this:
    ##
    ##  CXXFLAGS="-g"
    ##  ..
    ##  CXXFLAGS="+ ${CXXFLAGS}"
    ##
    ## The addition of "+"  CXXFLAGS should be the last action for
    ## that variable. The net effect is that "-g" will be added to
    ## flags set in cxx.sh.in. So the result may look like
    ## gcc -Wall -c -g ..
    ##
    ## Similar, put a "-" in front to get "gcc -g -Wall -c .." and
    ## put nothing or a "=" in front to get "gcc -g ..".
    ##
    ## Similar to CXXFLAGS are LDFLAGS and ARFLAGS for linking
    ## and making a static library.

    case "${cxx}" in
      cl|bcc32)
        OBJEXT=".obj"
        LIBEXT=".lib"
        EXEEXT=".exe"
        ANTLR_LIB="$abs_this_builddir/lib/cpp/src/antlr.lib"
        CPP="${cxx}"
        CPPFLAGS="-EP"
        ;;
      *)
        OBJEXT=".o"
        ;;
    esac

    LDFLAGS=
    AX_VAR_HEAD([AR])

    ##xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx##
    ##               END  COMPILER TUNING SECTION                   ##
    ##==============================================================##

    # Checks for header files.
    AC_HEADER_STDC
    AC_CHECK_HEADERS([stdlib.h unistd.h])

    # Checks for typedefs, structures, and compiler characteristics.
    AC_C_CONST
    AC_C_INLINE

    # Checks for library functions.
    AC_FUNC_MALLOC
    AC_CHECK_FUNCS([strcasecmp])

    ## Some further specific test required as are using std C++.
    ## (tbd)
    ;;
esac

##
test -z "$DOXYGEN" && AC_PATH_PROG(DOXYGEN, doxygen, doxygen,  )

# This seems to convince configure to use an absolute path to the backup
# install-sh script.
ac_install_sh="$PWD/scripts/install-sh"
AC_PROG_INSTALL
AC_PROG_RANLIB

test -z "$MKDIR" && AC_PATH_PROG(MKDIR, mkdir$EXEEXT, mkdir$EXEEXT )
test -z "$RM"    && AC_PATH_PROG(RM,    rm$EXEEXT, rm$EXEEXT )

AX_PATH_PROGS(
  [TAR],
  [gnutar tar],
  [AX_VAR_HEAD([TAR])]
)

AX_PATH_PROGS(
  [TOUCH],
  [/bin/touch /usr/bin/touch touch],
  [AX_VAR_HEAD([TOUCH])]
)

test -z "$CHMOD" && AC_PATH_PROG(CHMOD, chmod$EXEEXT, chmod$EXEEXT )
test -z "$SED"   && AC_PATH_PROG(SED,   sed$EXEEXT, sed$EXEEXT )
test -z "$CAT"   && AC_PATH_PROG(CAT,   cat$EXEEXT, cat$EXEEXT )
test -z "$GREP"  && AC_PATH_PROG(GREP,  grep$EXEEXT, grep$EXEEXT )

#xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx#
#                             PYTHON                                 #
#xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx#

AC_ARG_VAR([PYTHON],
  [By default we search for "python" in $PATH to execute Python files.
    Override this by providing a list of candidates in environment
    variable $PYTHON and use whitespace as spereration character. A
    candidate can be either a relative or absolute path name. In
    the former case a lookup in $PATH takes place, in the latter, the
    absolute path name must exist.])

AC_ARG_VAR([PYTHONFLAGS],[
    Shall contain all flags required to run Python. Override the
    default by using environment variable $PYTHONFLAGS.
])

AX_PYTHON_PROGS(
  [PYTHON],
  [python],
  [AX_VAR_HEAD([PYTHON])]
)

case $LANG_PY in
  1)
    # We need a script that wrap Python calls in order to make Python
    # ANTLR aware. This script needs to be executable.
    AC_CONFIG_FILES(
      [scripts/python.sh],
      [${CHMOD} a+x scripts/python.sh],
      [CHMOD=${CHMOD}]
    )

    AC_CONFIG_FILES(
      [scripts/pyantlr.sh:scripts/pyinst.sh.in],
      [${CHMOD} a+x scripts/pyantlr.sh],
      [CHMOD=${CHMOD}]
    )

    AC_CONFIG_FILES(
      [lib/python/Makefile]
    )

    # We have a Makefile that loops through all python examples.
    case $WITH_EXAMPLES in
      1 )
        AC_CONFIG_FILES(
          [examples/python/Makefile]
        )
        AC_CONFIG_FILES([
            examples/python/asn1/Makefile \
            examples/python/ASTsupport/Makefile \
            examples/python/calc/Makefile \
            examples/python/columns/Makefile \
            examples/python/exprAST/Makefile \
            examples/python/filter/Makefile \
            examples/python/filterWithRule/Makefile \
            examples/python/heteroAST/Makefile \
            examples/python/HTML/Makefile \
            examples/python/IDL/Makefile \
            examples/python/imagNodeAST/Makefile \
            examples/python/includeFile/Makefile \
            examples/python/inherit.tinyc/Makefile \
            examples/python/java/Makefile \
            examples/python/lexerTester/Makefile \
            examples/python/lexRewrite/Makefile \
            examples/python/linkChecker/Makefile \
            examples/python/multiLexer/Makefile \
            examples/python/multiParser/Makefile \
            examples/python/parseBinary/Makefile \
            examples/python/pascal/Makefile \
            examples/python/cpp/Makefile \
            examples/python/preserveWhiteSpace/Makefile \
            examples/python/tinybasic/Makefile \
            examples/python/tinyc/Makefile \
            examples/python/transform/Makefile \
            examples/python/treewalk/Makefile \
            examples/python/unicode/Makefile \
            examples/python/unicode.IDENTs/Makefile \
            examples/python/xml/Makefile
        ])
        ;;
    esac
    ;;
esac

#xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx#
#                             CSHARP                                 #
#xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx#

AC_ARG_VAR([CSHARPC],
  [By default we search for "cscc", "msc" and "csc" in $PATH to compile C# files.
    Override this by providing a list of candidates in environment
    variable $CSHARP and use whitespace as spereration character. A
    candidate can be either a relative or absolute path name. In
    the former case a lookup in $PATH takes place, in the latter, the
    absolute path name must exist.])

AC_ARG_VAR([CSHARPCFLAGS],[
    Shall contain all flags required to compile a #C file. Override the
    default by using environment variable $CSHARPCFLAGS.
])

AX_CSHARP_PROGS(
  [CSHARPC],
  [cscc mcs csc /usr/local/bin/cscc /usr/local/bin/mcs /opt/bin/cscc /opt/bin/mcs],
  [AX_VAR_HEAD([CSHARPC])]
)

## get the basename of C# compiler. Depending on basename we try to
## decide about the CLR.
test -n "${CSHARPC}"  && {
  csharpc=`basename ${CSHARPC}`
  csharpc_d=`dirname ${CSHARPC}`
}

case $csharpc in
  cscc*)
    AX_CSHARP_PROGS(
      [CLR],
      [${csharpc_d}/ilrun ilrun /usr/local/bin/ilrun /opt/bin/ilrun],
      [AX_VAR_HEAD([CLR])]
    )
    ;;
  mcs*)
    AX_CSHARP_PROGS(
      [CLR],
      [${csharpc_d}/mono mono /usr/local/bin/mono /opt/bin/mono],
      [AX_VAR_HEAD([CLR])]
    )
    ;;
esac

case $LANG_CS in
  1)
    AC_CONFIG_FILES(
      [scripts/csc.sh],
      [${CHMOD} a+x scripts/csc.sh],
      [CHMOD=${CHMOD}]
    )

    AC_CONFIG_FILES([lib/csharp/Makefile])
    AC_CONFIG_FILES([lib/csharp/antlr.runtime/Makefile])
    AC_CONFIG_FILES([lib/csharp/antlr.astframe/Makefile])

    # We have a Makefile that loops through all python examples.
    case $WITH_EXAMPLES in
      1)
        AC_CONFIG_FILES([examples/csharp/ASTsupport/Makefile])
        AC_CONFIG_FILES([examples/csharp/HTML/Makefile])
        AC_CONFIG_FILES([examples/csharp/IDL/Makefile])
        AC_CONFIG_FILES([examples/csharp/ParseTreeDebug/Makefile])
        AC_CONFIG_FILES([examples/csharp/TokenStreamRewrite/Makefile])
        AC_CONFIG_FILES([examples/csharp/calc/Makefile])
        AC_CONFIG_FILES([examples/csharp/columns/Makefile])
        AC_CONFIG_FILES([examples/csharp/exprAST/Makefile])
        AC_CONFIG_FILES([examples/csharp/filter/Makefile])
        AC_CONFIG_FILES([examples/csharp/filterWithRule/Makefile])
        AC_CONFIG_FILES([examples/csharp/heteroAST/Makefile])
        AC_CONFIG_FILES([examples/csharp/java/Makefile])
        AC_CONFIG_FILES([examples/csharp/multiLexer/Makefile])
        AC_CONFIG_FILES([examples/csharp/parseBinary/Makefile])
        AC_CONFIG_FILES([examples/csharp/preserveWhiteSpace/Makefile])
        AC_CONFIG_FILES([examples/csharp/tinyc/Makefile])
        AC_CONFIG_FILES([examples/csharp/unicode/Makefile])
        AC_CONFIG_FILES([examples/csharp/Makefile])
        ;;
    esac
    ;;
esac

# We need a script that wrap java calls in order to make Java
# ANTLR aware. This script needs to be executable.
AC_CONFIG_FILES(
  [scripts/java.sh],
  [${CHMOD} a+x scripts/java.sh])

# We need a script that wrap jar calls in order to make Java
# ANTLR aware. This script needs to be executable.
AC_CONFIG_FILES(
  [scripts/jar.sh],
  [${CHMOD} a+x scripts/jar.sh])

# We need a script that wrap javac calls in order to make Javac
# ANTLR aware. This script needs to be executable.
AC_CONFIG_FILES(
  [scripts/javac.sh],
  [${CHMOD} a+x scripts/javac.sh])

# We need a script that wraps antlr calls
AC_CONFIG_FILES(
  [scripts/antlr.sh],
  [${CHMOD} a+x scripts/antlr.sh])

case $LANG_CXX in
  1)
    # We need a script that wraps how we compile C++
    AC_CONFIG_FILES([scripts/cxx.sh],[${CHMOD} a+x scripts/cxx.sh])

    # # We need a script that wraps how we link C++
    AC_CONFIG_FILES([scripts/link.sh],[${CHMOD} a+x scripts/link.sh])

    # There's a few C files around so make sure we can compile those as well
    AC_CONFIG_FILES([scripts/c.sh],[${CHMOD} a+x scripts/c.sh])

     # We need a script that wraps how we build a (static?) library
    AC_CONFIG_FILES([scripts/lib.sh],[${CHMOD} a+x scripts/lib.sh])

    # We need a script that wraps how we run the preprocessor
    AC_CONFIG_FILES([scripts/cpp.sh],[${CHMOD} a+x scripts/cpp.sh])

    # C++ library
    AC_CONFIG_FILES([lib/cpp/Makefile])
    AC_CONFIG_FILES([lib/cpp/antlr/Makefile])
    AC_CONFIG_FILES([lib/cpp/src/Makefile])

    # C++ examples
    case $WITH_EXAMPLES in
      1)
        AC_CONFIG_FILES([examples/cpp/Makefile])
        AC_CONFIG_FILES([examples/cpp/ASTsupport/Makefile])
        AC_CONFIG_FILES([examples/cpp/calc/Makefile])
        AC_CONFIG_FILES([examples/cpp/exprAST/Makefile])
        AC_CONFIG_FILES([examples/cpp/filter/Makefile])
        AC_CONFIG_FILES([examples/cpp/filterWithRule/Makefile])
        AC_CONFIG_FILES([examples/cpp/flexLexer/Makefile])
        AC_CONFIG_FILES([examples/cpp/HTML/Makefile])
        AC_CONFIG_FILES([examples/cpp/heteroAST/Makefile])
        AC_CONFIG_FILES([examples/cpp/IDL/Makefile])
        AC_CONFIG_FILES([examples/cpp/imagNodeAST/Makefile])
        AC_CONFIG_FILES([examples/cpp/includeFile/Makefile])
        AC_CONFIG_FILES([examples/cpp/inherit.tinyc/Makefile])
        AC_CONFIG_FILES([examples/cpp/java/Makefile])
        AC_CONFIG_FILES([examples/cpp/lexRewrite/Makefile])
        AC_CONFIG_FILES([examples/cpp/multiLexer/Makefile])
        AC_CONFIG_FILES([examples/cpp/multiParser/Makefile])
        AC_CONFIG_FILES([examples/cpp/parseBinary/Makefile])
        AC_CONFIG_FILES([examples/cpp/preserveWhiteSpace/Makefile])
        AC_CONFIG_FILES([examples/cpp/tinyc/Makefile])
        AC_CONFIG_FILES([examples/cpp/tokenStreamRewrite/Makefile])
        AC_CONFIG_FILES([examples/cpp/transform/Makefile])
        AC_CONFIG_FILES([examples/cpp/treewalk/Makefile])
        AC_CONFIG_FILES([examples/cpp/unicode/Makefile])
        ;;
    esac
    ;;
esac

# Makefile to build supplementary libraries ..
AC_CONFIG_FILES([lib/Makefile])
case $WITH_EXAMPLES in
  1)
    AC_CONFIG_FILES([examples/Makefile])
    ;;
esac

AC_CONFIG_FILES([doc/Makefile])
AC_CONFIG_FILES([Makefile])
AC_CONFIG_FILES([scripts/antlr-config scripts/run-antlr scripts/antlr.spec])

case $LANG_JAVA in
  1)
    AC_CONFIG_FILES([antlr/Makefile])
    case $WITH_EXAMPLES in
      1)
        AC_CONFIG_FILES([examples/java/ASTsupport/Makefile])
        AC_CONFIG_FILES([examples/java/HTML/Makefile])
        AC_CONFIG_FILES([examples/java/IDL/Makefile])
        AC_CONFIG_FILES([examples/java/calc/Makefile])
        AC_CONFIG_FILES([examples/java/columns/Makefile])
        AC_CONFIG_FILES([examples/java/exprAST/Makefile])
        AC_CONFIG_FILES([examples/java/filter/Makefile])
        AC_CONFIG_FILES([examples/java/filterWithRule/Makefile])
        AC_CONFIG_FILES([examples/java/heteroAST/Makefile])
        AC_CONFIG_FILES([examples/java/imagNodeAST/Makefile])
        AC_CONFIG_FILES([examples/java/includeFile/Makefile])
        AC_CONFIG_FILES([examples/java/inherit.tinyc/Makefile])
        AC_CONFIG_FILES([examples/java/java/Makefile])
        AC_CONFIG_FILES([examples/java/lexRewrite/Makefile])
        AC_CONFIG_FILES([examples/java/linkChecker/Makefile])
        AC_CONFIG_FILES([examples/java/multiLexer/Makefile])
        AC_CONFIG_FILES([examples/java/parseBinary/Makefile])
        AC_CONFIG_FILES([examples/java/pascal/Makefile])
        AC_CONFIG_FILES([examples/java/preserveWhiteSpace/Makefile])
        AC_CONFIG_FILES([examples/java/tinybasic/Makefile])
        AC_CONFIG_FILES([examples/java/tinyc/Makefile])
        AC_CONFIG_FILES([examples/java/transform/Makefile])
        AC_CONFIG_FILES([examples/java/treewalk/Makefile])
        AC_CONFIG_FILES([examples/java/unicode.IDENTs/Makefile])
        AC_CONFIG_FILES([examples/java/unicode/Makefile])
        AC_CONFIG_FILES([examples/java/xml/Makefile])
        AC_CONFIG_FILES([examples/java/Makefile])
        AC_CONFIG_FILES([examples/java/cpp/Makefile])
        ;;
    esac

    ANTLR_ACTION_FILES=""
    ANTLR_ACTION_FILES="${ANTLR_ACTION_FILES} actions/cpp/ActionLexer.java"
    ANTLR_ACTION_FILES="${ANTLR_ACTION_FILES} actions/cpp/ActionLexerTokenTypes.java"
    ANTLR_ACTION_FILES="${ANTLR_ACTION_FILES} actions/csharp/ActionLexer.java"
    ANTLR_ACTION_FILES="${ANTLR_ACTION_FILES} actions/csharp/ActionLexerTokenTypes.java"
    ANTLR_ACTION_FILES="${ANTLR_ACTION_FILES} actions/java/ActionLexer.java"
    ANTLR_ACTION_FILES="${ANTLR_ACTION_FILES} actions/java/ActionLexerTokenTypes.java"
    ANTLR_ACTION_FILES="${ANTLR_ACTION_FILES} actions/python/ActionLexer.java"
    ANTLR_ACTION_FILES="${ANTLR_ACTION_FILES} actions/python/ActionLexerTokenTypes.java"
    ANTLR_ACTION_FILES="${ANTLR_ACTION_FILES} actions/python/CodeLexer.java"
    ANTLR_ACTION_FILES="${ANTLR_ACTION_FILES} actions/python/CodeLexerTokenTypes.java"

    ANTLR_ANTLR_FILES=""
    ANTLR_ANTLR_FILES="${ANTLR_ANTLR_FILES}   ANTLRParser.java"
    ANTLR_ANTLR_FILES="${ANTLR_ANTLR_FILES}   ANTLRTokenTypes.java"
    ANTLR_ANTLR_FILES="${ANTLR_ANTLR_FILES}   ANTLRLexer.java"

    ANTLR_TOKDEF_FILES=""
    ANTLR_TOKDEF_FILES="${ANTLR_TOKDEF_FILES} ANTLRTokdefParser.java"
    ANTLR_TOKDEF_FILES="${ANTLR_TOKDEF_FILES} ANTLRTokdefLexer.java"
    ANTLR_TOKDEF_FILES="${ANTLR_TOKDEF_FILES} ANTLRTokdefParserTokenTypes.java"

    ## This variables can be used in antlr/Makefile

    file_list="${ANTLR_ACTION_FILES} ${ANTLR_ANTLR_FILES} ${ANTLR_TOKDEF_FILES}"
    if test "x${file_list}" == "x" ; then
      :
    else
      ANTLR_CONFIG_FILES=""
      ANTLR_FILE_LIST=""

      ## iterate over my file list. If a file exists then  don't copy
      ## this file - autoconf's behaviour is to delete existing files.
      for x in ${file_list} ; do
        f="antlr/${x}"
        if test -f "${f}" ; then
          :
        else
          f="${f}:${f}"
          ANTLR_CONFIG_FILES="${ANTLR_CONFIG_FILES} ${f}"
          ANTLR_FILE_LIST="${ANTLR_FILE_LIST} antlr/${x}"
        fi
      done

      ## copy files into build directory and make them writeable  (in
      ## case we copy them from our depot. The actions necessary here
      ## to execute  a  command  (chmod)  on  a list  of files is bit
      ## hackish - it may depend  on autoconf version in  use  (works
      ## fine for autoconf 2.59).
      ## The problem is that autoconf takes the file list literally,
      ## ie. we end up in config.status by something like
      ##
      ##  case $ac_file in
      ##  ..
      ##  $ANTLR_CONFIG_FILES) chmod a+w .. ;;
      ##  esac
      ##
      ## To make this work I'm introducing ANTLR_CONFIG_FILES as kind
      ## of 'catch-all'  variable.  The  side   effect  is that every
      ## file with no explicit action will get a "chmod  a+w ..." But
      ## that should be ok for Makefiles etc.

      AC_CONFIG_FILES([
          ${ANTLR_CONFIG_FILES} ],[
          ### echo "config.status: chmod a+w ${ac_file} .."
          ${CHMOD} a+w "${ac_file}" ],[
          ANTLR_CONFIG_FILES='*'
          ANTLR_FILE_LIST="${ANTLR_FILE_LIST}"
          CHMOD="${CHMOD}"
        ]
      )
    fi
    ;;
esac

## compute basename of core libraries
antlr_jar=`basename ${ANTLR_JAR}`
antlr_net=`basename ${ANTLR_NET}`
antlr_lib=`basename ${ANTLR_LIB}`
antlr_py=`basename ${ANTLR_PY}`
astframe_net=`basename ${ASTFRAME_NET}`

test -z "${JAVA}" && {
  JAVA=java
}

### cygwin has no (supported) Java - users are requested to have java
### in their PATH in order to execute "bin/antlr.sh". To support this
### I'm making sure that just the basename is used.
case $host_os in
  *cygwin* |*mingw*|*msys*)
  AX_BASENAME([JAVA])
  ;;
esac

# we assume that we have standard rm arround. This should be checked.
RMF="$RM -r -f"

AC_OUTPUT