dnl -*-fundamental-*-					  *@--GLOB-HEADER--@*
dnl
dnl $Id$
dnl
dnl Common library of autoconf macros
dnl
dnl (c) 1997 Mark Wooding, except for macros and documentation where noted.
dnl

dnl----- Licensing notice ---------------------------------------------------
dnl
dnl This file is part of the Common Files Distribution (`common')
dnl 
dnl `Common' is free software; you can redistribute it and/or modify
dnl it under the terms of the GNU General Public License as published by
dnl the Free Software Foundation; either version 2 of the License, or
dnl (at your option) any later version.
dnl 
dnl `Common' is distributed in the hope that it will be useful,
dnl but WITHOUT ANY WARRANTY; without even the implied warranty of
dnl MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
dnl GNU General Public License for more details.
dnl 
dnl You should have received a copy of the GNU General Public License
dnl along with `common'; if not, write to the Free Software Foundation,
dnl Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.

dnl *@--NOTICE--@* Common File Distribution
dnl $Id$

dnl --- *@-mdw_CURSES-@* ---
dnl
dnl Author:	Mark Wooding
dnl
dnl Synopsis:	mdw_CURSES
dnl
dnl Arguments:	---
dnl
dnl Use:	Searches for a `curses' library (one of `ncurses' or
dnl		`curses') using mdw_CHECK_MANYLIBS.  If one is found, the
dnl		preprocessor macro HAVE_CURSES is defined, and a search is
dnl		made for a `curses' header file (one of <ncurses.h>,
dnl		<ncurses/ncurses.h> or <curses.h>) using AC_CHECK_HEADERS
dnl		and the appropriate preprocessor symbol is defined.
dnl		Finally, a check is made for the function `wresize' using
dnl		AC_CHECK_FUNCS.

AC_DEFUN([mdw_CURSES],
[mdw_CHECK_MANYLIBS([newwin], [ncurses curses],
                    [AC_DEFINE([HAVE_CURSES], 
                               [Define if you have a curses library.])])
if test $mdw_cv_lib_newwin != no; then
AC_CHECK_HEADERS([ncurses.h ncurses/ncurses.h curses.h], [break])
if test "$ac_cv_header_ncurses_h" = "no" &&
   test "$ac_cv_header_ncurses_ncurses_h" = "no" &&
   test "$ac_cv_header_curses_h" = "no"; then
     AC_MSG_WARN([couldn't find a \`curses' header.  Assuming \`curses.h'.])
     AC_DEFINE([HAVE_CURSES_H], [1], [Define if you have a `curses.h' header.])
fi
AC_CHECK_FUNCS(wresize)
fi])

dnl --- *@-mdw_TYPE_SSIZE_T-@* ---
dnl
dnl Author:	Mark Wooding
dnl
dnl Synopsis:	mdw_TYPE_SSIZE_T
dnl
dnl Arguments:	---
dnl
dnl Use:	Checks whether the Posix type `ssize_t' is defined.  If not,
dnl		it defaults to `int'.

AC_DEFUN([mdw_TYPE_SSIZE_T],
[AC_REQUIRE([AC_HEADER_STDC])
AC_CACHE_CHECK(for ssize_t, mdw_cv_ssize_t,
[AC_EGREP_CPP(ssize_t,
[#include <sys/types.h>
#if HAVE_UNISTD_H
#include <unistd.h>
#endif
#if STDC_HEADERS
#include <stdlib.h>
#include <stddef.h>
#endif],
[mdw_cv_ssize_t=yes], [mdw_cv_ssize_t=no])])
if test $mdw_cv_ssize_t = no; then
  AC_DEFINE([ssize_t], [int], [Define to `int' if your system doesn't have ssize_t.])
fi])

dnl --- *@-mdw_DECL_ENVIRON-@* ---
dnl
dnl Author:	Mark Wooding
dnl
dnl Synopsis:	mdw_DECL_ENVIRON
dnl
dnl Arguments:	---
dnl
dnl Use:	Searches for a declaration of the global `environ' variable.
dnl		If one is found in one of the `usual' places, DECL_ENVIRON
dnl		is defined as a preprocessor symbol.

AC_DEFUN([mdw_DECL_ENVIRON],
[AC_CACHE_CHECK([for declaration of \`environ'], mdw_cv_environ,
[AC_EGREP_CPP(environ, 
[#include <sys/types.h>
#if HAVE_UNISTD_H
#include <unistd.h>
#endif
#if STDC_HEADERS
#include <stdlib.h>
#include <stddef.h>
#endif], [mdw_cv_environ=yes], [mdw_cv_environ=no])])
if test $mdw_cv_environ = yes; then
  AC_DEFINE([DECL_ENVIRON], [1],
            [Define if you have the `environ' vector of environment variables.])
fi])

dnl --- *@-mdw_CHECK_MANYLIBS-@* ---
dnl
dnl Author:	Mark Wooding
dnl
dnl Synopsis:	mdw_CHECK_MANYLIBS(FUNC, LIBS, [IF-FOUND], [IF-NOT-FOUND],
dnl			[INCLUDES], [ARGS])
dnl
dnl Arguments:	FUNC = a function to try to find
dnl		LIBS = a whitespace-separated list of libraries to search
dnl		IF-FOUND = what to do when the function is found
dnl		IF-NOT-FOUND = what to do when the function isn't found
dnl		INCLUDES = other include files to add
dnl		ARGS = arguments to pass the function
dnl
dnl Use:	Searches for a library which defines FUNC.  It first tries
dnl		without any libraries; then it tries each library specified
dnl		in LIBS in turn.  If it finds a match, it adds the
dnl		appropriate library to `LIBS'.
dnl
dnl		This is particularly handy under DIREIX: if you link with
dnl		`-lnsl' then you get non-NIS-aware versions of getpwnam and
dnl		so on, which is clearly a Bad Thing.

AC_DEFUN([mdw_CHECK_MANYLIBS],
[AC_CACHE_CHECK([for library containing $1], [mdw_cv_lib_$1],
[mdw_save_LIBS="$LIBS"
mdw_cv_lib_$1="no"
AC_TRY_LINK([$5], [$1($6)], [mdw_cv_lib_$1="none required"])
test "$mdw_cv_lib_$1" = "no" && for i in $2; do
LIBS="-l$i $mdw_save_LIBS"
AC_TRY_LINK([$5], [$1($6)],
[mdw_cv_lib_$1="-l$i"
break])
done
LIBS="$mdw_save_LIBS"])
if test "$mdw_cv_lib_$1" != "no"; then
  test "$mdw_cv_lib_$1" = "none required" || LIBS="$mdw_cv_lib_$1 $LIBS"
  $3
else :
  $4
fi])

dnl --- *@-mdw__PYTHON_VERSION-@* ---
dnl
dnl Will fail hopelessly on Python < 1.5.2.  Nobody uses that any more, 
dnl right?

AC_DEFUN([mdw__PYTHON_VERSION],
[$1 -c 'from sys import *; v = argv[1]; vv = v.split("."); x = 0
for i in range(len(vv)): x = x | (int(vv[i]) << (24 - i * 8))
exit(x > hexversion)' $2])

dnl --- *@-mdw_PROG_PYTHON-@* ---
dnl
dnl Author:	Mark Wooding
dnl
dnl Synopsis:	mdw_PROG_PYTHON(VERSION, [IF-FOUND], [IF-NOT-FOUND])
dnl
dnl Arguments:	VERSION = version number of Python required
dnl		IF-FOUND = what to do if it's found
dnl		IF-NOT-FOUND = what to do if it isn't
dnl
dnl Use:	Attempts to find a working version of Python with a late
dnl		enough version number.  It supplies an option `--with-python'
dnl		to allow the user to provide a Python interpreter.  If one
dnl		isn't provided explicitly, it searches for `python' and 
dnl		`pythonVERSION' in the current PATH, asking them whether they
dnl		have a late enough version number.  The path of the working
dnl		Python is put into the `PYTHON' environment variable;
dnl		`AC_SUBST' is used to substitute its value into Python 
dnl		scripts.  If there is no Python to be found, the value of 
dnl		`PYTHON' is set to be `none'.

AC_DEFUN([mdw_PROG_PYTHON],
[AC_ARG_WITH([python],
[  --with-python=PYTHON	  specify path to Python version $1 or newer],
[PYTHON="$withval"],
if test -z "$PYTHON"; then
[AC_CACHE_CHECK([for Python version $1 or later], mdw_cv_prog_python,
[mdw_cv_prog_python="none"
for p in `echo "$PATH:/usr/local/bin" | tr ":" " "`; do
  case $p in /*) ;; *) p=`pwd`/$p ;; esac
  if mdw__PYTHON_VERSION(["$p/python"], $1); then
    mdw_cv_prog_python="$p/python"
    break
  fi
  if mdw__PYTHON_VERSION(["$p/python$1"], $1); then
    mdw_cv_prog_python="$p/python$1"
    break
  fi
done])
PYTHON="$mdw_cv_prog_python"])
fi

AC_SUBST(PYTHON)dnl
if test "$PYTHON" = "none"; then :
  $3
else :
  $2
fi])

dnl --- *@-mdw_CHECK_PYTHON-@* ---
dnl
dnl Author:	Mark Wooding
dnl
dnl Synopsis:	mdw_CHECK_PYTHON(VERSION)
dnl
dnl Arguments:	VERSION = version number of Python required
dnl
dnl Use:	Verifies that the Python interpreter in the `PYTHON' shell
dnl		variable actually works and is of the right version.  If it's
dnl		not, an error is raised and configuration is aborted.

AC_DEFUN([mdw_CHECK_PYTHON],
[AC_REQUIRE([mdw_PROG_PYTHON], [mdw_PROG_PYTHON([$1])])
AC_MSG_CHECKING([whether Python ($PYTHON) works])
if test "$PYTHON" != "none" && mdw__PYTHON_VERSION("$PYTHON", $1); then
  AC_MSG_RESULT([yes])
else
  AC_MSG_RESULT([no])
  AC_MSG_ERROR([Python version $1 or newer not found.
If you have a recent enough Python, and I just failed to find it, try using
the --with-python=PYTHON option to give me an explicit pathname.])
fi])

dnl --- *@-mdw__PERL_VERSION-@* ---
dnl
dnl AC_DEFUN relies on `[', `]' being quotes, so I have to drop down a level.

AC_DEFUN([mdw__PERL_VERSION], [mdw__PERL_VERSION_hack([$1], [$2])])
changequote(<<, >>)
define(<<mdw__PERL_VERSION_hack>>, <<$1 -e 'exit ($] < $2);' >&5 2>&5>>)
changequote([, ])

dnl --- *@-mdw_PROG_PERL-@* ---
dnl
dnl Author:	Mark Wooding
dnl
dnl Synopsis:	mdw_PROG_PERL(VERSION, [IF-FOUND], [IF-NOT-FOUND])
dnl
dnl Arguments:	VERSION = version number of Perl required
dnl		IF-FOUND = what to do if it's found
dnl		IF-NOT-FOUND = what to do if it isn't
dnl
dnl Use:	Attempts to find a working version of Perl with a late
dnl		enough version number.  It supplies an option `--with-perl'
dnl		to allow the user to provide a Perl interpreter.  If one
dnl		isn't provided explicitly, it searches for `perl' and `perl5'
dnl		in the current PATH, asking them whether they have a late
dnl		enough version number.  The path of the working Perl is
dnl		put into the `PERL' environment variable; `AC_SUBST' is used
dnl		to substitute its value into Perl scripts.  If there is no
dnl		Perl to be found, the value of `PERL' is set to be `none'.

AC_DEFUN([mdw_PROG_PERL],
[AC_ARG_WITH([perl],
[  --with-perl=PERL	  specify path to Perl version $1 or newer],
[PERL="$withval"],
if test -z "$PERL"; then
[AC_CACHE_CHECK([for Perl version $1 or later], mdw_cv_prog_perl,
[mdw_cv_prog_perl="none"
for p in `echo "$PATH:/usr/local/bin" | tr ":" " "`; do
  case $p in /*) ;; *) p=`pwd`/$p ;; esac
  if mdw__PERL_VERSION(["$p/perl"], $1); then
    mdw_cv_prog_perl="$p/perl"
    break
  fi
  if mdw__PERL_VERSION(["$p/perl5"], $1); then
    mdw_cv_prog_perl="$p/perl5"
    break
  fi
done])
PERL="$mdw_cv_prog_perl"])
fi

AC_SUBST(PERL)dnl
if test "$PERL" = "none"; then :
  $3
else :
  $2
fi])

dnl --- *@-mdw_CHECK_PERL-@* ---
dnl
dnl Author:	Mark Wooding
dnl
dnl Synopsis:	mdw_CHECK_PERL(VERSION)
dnl
dnl Arguments:	VERSION = version number of Perl required
dnl
dnl Use:	Verifies that the Perl interpreter in the `PERL' shell
dnl		variable actually works and is of the right version.  If it's
dnl		not, an error is raised and configuration is aborted.

AC_DEFUN([mdw_CHECK_PERL],
[AC_REQUIRE([mdw_PROG_PERL], [mdw_PROG_PERL([$1])])
AC_MSG_CHECKING([whether Perl ($PERL) works])
if test "$PERL" != "none" && mdw__PERL_VERSION("$PERL", $1); then
  AC_MSG_RESULT([yes])
else
  AC_MSG_RESULT([no])
  AC_MSG_ERROR([Perl version $1 or newer not found.
If you have a recent enough Perl, and I just failed to find it, try using
the --with-perl=PERL option to give me an explicit pathname.])
fi])

dnl --- *@-mdw_PERLLIB_CHECK-@* ---
dnl
dnl Author:	Mark Wooding
dnl
dnl Synopsis:	mdw_PERLLIB_CHECK(LIBRARY)
dnl
dnl Arguments:	LIBRARY = name of a Perl library to check for
dnl
dnl Use:	Ensures that a Perl script can `use LIBRARY;'.  If it can,
dnl		all's well and good; if it can't, `LIBRARY.pm' is added to
dnl		the variable `NEEDED_PERLLIBS' and a line which adds 
dnl		`pkgdatadir' to Perl's `@INC' array is placed in the
dnl		variable `INC_PERLLIBS'; `AC_SUBST' is called for both of
dnl		these variables.  It's expected that `NEEDED_PERLLIBS' will
dnl		be used in the `Makefile.in' to decide which versions from
dnl		the distribution need installing.
dnl
dnl		This macro isn't terribly useful in the general case.  It
dnl		Also implicitly assumes that `$PERL' is Perl 5 or later.

AC_DEFUN([mdw__PERLLIB_INIT],
[AC_SUBST(INC_PERLLIBS)dnl
AC_SUBST(NEEDED_PERLLIBS)dnl
])

AC_DEFUN([mdw_PERLLIB_CHECK],
[AC_REQUIRE([mdw__PERLLIB_INIT])
AC_REQUIRE([mdw_CHECK_PERL], [mdw_PROG_PERL([5])])
AC_CACHE_CHECK([for Perl library $1], mdw_cv_perllib_$1,
[if $PERL -e 'use $1;' >&5 2>&5; then
  mdw_cv_perllib_$1="yes"
else
  mdw_cv_perllib_$1="no"
fi])

if test "$mdw_cv_perllib_$1" = "no"; then
  NEEDED_PERLLIBS="$NEEDED_PERLLIBS $1.pm"

  # --- Deal with autoconf lossage ---
  #
  # It doesn't want to define `prefix' until rather later on, so I have
  # to bodge it here.

  if test -z "$INC_PERLLIBS"; then
    mdw_old_prefix="$prefix"
    test "$prefix" = "NONE" && prefix="$ac_default_prefix";
    INC_PERLLIBS="BEGIN { push @INC, \"`eval echo $datadir/$PACKAGE`\"; }"
    prefix="$mdw_old_prefix";
  fi
fi])

dnl --- *@-mdw_GCC_FLAGS-@* ---
dnl
dnl Author:	Mark Wooding
dnl
dnl Synopsis:	mdw_GCC_FLAGS([FLAGS], [CFLAGS], [C++FLAGS])
dnl
dnl Arguments:	FLAGS = GCC compiler flags to add (default is 
dnl			`-pedantic -Wall')
dnl		CFLAGS = GCC C compiler flags to add (default is empty)
dnl		C++FLAGS = GCC C++ compiler flags to add (default is
dnl			`-fhandle-exceptions').
dnl
dnl Use:	If the C compiler is GCC, add the compiler flags.

AC_DEFUN([mdw_GCC_FLAGS],
[if test "$GCC" = "yes"; then
  CFLAGS="$CFLAGS ifelse([$1], [], [-pedantic -Wall], [$1])"
  CFLAGS="$CFLAGS ifelse([$2], [], [], [$2])"
fi
if test "$GXX" = "yes"; then
  CXXFLAGS="$CXXFLAGS ifelse([$1], [], [-pedantic -Wall], [$1])"
  CXXFLAGS="$CXXFLAGS ifelse([$3], [], [-fhandle-exceptions], [$3])"
fi])

dnl --- *@-mdw_INIT_LIB-@* ---
dnl
dnl Author:	Mark Wooding
dnl
dnl Synopsis:	mdw_INIT_LIB(LIB, NAME, VERSION, [PACKAGE])
dnl
dnl Arguments:	LIB = the name of the library (and the package)
dnl		NAME = a presentable version of the library's name
dnl		VERSION = version of the library
dnl		PACKAGE = package name to pass on to AM_INIT_AUTOMAKE
dnl
dnl Use:	Sets up various useful variables.  This macro calls
dnl		AM_INIT_AUTOMAKE, which might be considered useful.  It also
dnl		provides variables for the use of `lib-config.in'.

AC_DEFUN([mdw_INIT_LIB],
[AM_INIT_AUTOMAKE(ifelse([$4], [], [$1], [$4]), [$3])
LIBRARY="$1" AC_SUBST(LIBRARY)
LIBNAME="$2" AC_SUBST(LIBNAME)])

dnl --- *@-mdw_LIB_CONFIG-@* ---
dnl
dnl Author:	Mark Wooding
dnl
dnl Synopsis:	mdw_LIB_CONFIG(LIB, NAME, VERSION, IF-FOUND, IF-NOT-FOUND)
dnl
dnl Arguments:	LIB = the name of the library (and its configuration program)
dnl		NAME = a presentable version of the library's name
dnl		VERSION = version of library required
dnl		IF-FOUND = what to do if found
dnl		IF-NOT-FOUND = what to do if not found	
dnl
dnl Use:	Configures a library client program, using a configuration
dnl		script provided by the library maintainer.
dnl
dnl		The default version is 1.0.0pre0; the default action is to
dnl		add everything to the CFLAGS and LIBS variables, and complain
dnl		if the library couldn't be found.
dnl
dnl		The variable LIB_VERSION contains the version number of
dnl		the library; LIB_CFLAGS is the C compiler flags required
dnl		and LIB_LIBS is the linker flags.

AC_DEFUN([mdw_LIB_CONFIG],
[pushdef([upname], translit([$1], [a-z], [A-Z]))dnl
AC_MSG_CHECKING([for $2 library])
if $1-config --check $3 >/dev/null 2>&1; then
  upname[]_VERSION=`$1-config --version`
  upname[]_CFLAGS=`$1-config --cflags`
  upname[]_LIBS=`$1-config --libs`
  AC_SUBST(upname[]_VERSION)
  AC_SUBST(upname[]_CFLAGS)
  AC_SUBST(upname[]_LIBS)
  ifelse([$4], [],
  [CFLAGS="$CFLAGS $upname[]_CFLAGS"
  LIBS="$upname[]_LIBS $LIBS"],
  $4)
  AC_MSG_RESULT([$upname[]_VERSION])
else
  ifelse([$5], [],
  AC_MSG_ERROR([$2 library not found or too old.]),
  $5)
  AC_MSG_RESULT([not found])
fi
popdef([upname])])

dnl --- *@-mdw_MLIB-@* ---
dnl
dnl Author:	Mark Wooding
dnl
dnl Synopsis:	mdw_MLIB(VERSION, IF-FOUND, IF-NOT-FOUND
dnl
dnl Arguments:	VERSION = version of library required
dnl		IF-FOUND = what to do if found
dnl		IF-NOT-FOUND = what to do if not found	
dnl
dnl Use:	Configures an mLib client program.

AC_DEFUN([mdw_MLIB], [mdw_LIB_CONFIG(mLib, mLib, $@)])

dnl --- *@-mdw_MGLIB-@* ---
dnl
dnl Author:	Mark Wooding
dnl
dnl Synopsis:	mdw_MGLIB(VERSION, IF-FOUND, IF-NOT-FOUND
dnl
dnl Arguments:	VERSION = version of library required
dnl		IF-FOUND = what to do if found
dnl		IF-NOT-FOUND = what to do if not found	
dnl
dnl Use:	Configures an mgLib client program.

AC_DEFUN([mdw_MGLIB],
[AC_REQUIRE([mdw_MLIB], [mdw_MLIB([2.0.3])])
mdw_LIB_CONFIG(mgLib, mgLib, $@)])

dnl --- *@-mdw_CATACOMB-@* ---
dnl
dnl Author:	Mark Wooding
dnl
dnl Synopsis:	mdw_CATACOMB([VERSION], [IF-FOUND], [IF-NOT-FOUND])
dnl
dnl Arguments:	VERSION = version of Catacomb required
dnl		IF-FOUND = what to do if found
dnl		IF-NOT-FOUND = what to do if not found	
dnl
dnl Use:	Configures the program as a Catacomb client.

AC_DEFUN([mdw_CATACOMB],
[AC_REQUIRE([mdw_MLIB], [mdw_MLIB([2.0.3])])
mdw_LIB_CONFIG(catacomb, Catacomb, $@)])

dnl --- *@-mdw_PK-@* ---
dnl
dnl Author:	Mark Wooding
dnl
dnl Synopsis:	mdw_PK([VERSION], [IF-FOUND], [IF-NOT-FOUND])
dnl
dnl Arguments:	VERSION = version of PK required
dnl		IF-FOUND = what to do if found
dnl		IF-NOT-FOUND = what to do if not found	
dnl
dnl Use:	Configures the program as a PK client.

AC_DEFUN([mdw_PK],
[AC_REQUIRE([mdw_MLIB], [mdw_MLIB([2.0.3])])
mdw_LIB_CONFIG(pk, PK, $@)])

dnl --- *@-mdw_OPT_NDEBUG-@* ---
dnl
dnl Author:	Mark Wooding
dnl
dnl Synopsis:	mdw_OPT_NDEBUG
dnl
dnl Arguments:	---
dnl
dnl Use:	Turns on the `NDEBUG' flag, to disable useful things like
dnl		assertions.

AC_DEFUN([mdw_OPT_NDEBUG],
[AC_ARG_ENABLE(debugging,
[  --disable-debugging     spews vast swathes of useless information],
[if test "$enableval" = "no"; then
  AC_DEFINE([NDEBUG], [1],
            [Define to turn off assertions and other debugging.  Not recommended.])
fi])])

dnl --- *@-mdw_OPT_EFENCE-@* ---
dnl
dnl Author:	Mark Wooding
dnl
dnl Synopsis:	mdw_OPT_EFENCE
dnl
dnl Arguments:	---
dnl
dnl Use:	Links with the Electric Fence library.

AC_DEFUN([mdw_OPT_EFENCE],
[AC_ARG_WITH(electric-fence,
[  --with-electric-fence   link programs with Electric Fence],
[if test "$withval" = "yes"; then
  AC_CHECK_LIB(efence, malloc)
fi])])

dnl --- *@-mdw_OPT_TRACE-@* ---
dnl
dnl Author:	Mark Wooding
dnl
dnl Synopsis:	mdw_OPT_TRACE
dnl
dnl Arguments:	---
dnl
dnl Use:	Turns on the `NTRACE' flag, to disable useful things like
dnl		trace outputs.

AC_DEFUN([mdw_OPT_TRACE],
[AC_ARG_ENABLE(tracing,    
[  --disable-tracing       disable output of trace information],
[if test "$enableval" = "no"; then
  AC_DEFINE([NTRACE], [1], [Define to turn off tracing.])
fi])])

dnl --- *@-mdw_OPT_mLib_TRACK-@* ---
dnl
dnl Author:	Mark Wooding
dnl
dnl Synopsis:	mdw_OPT_mLib_TRACK(PROGRAM)
dnl
dnl Arguments:	PROGRAM = name of this program or package.
dnl
dnl Use:	Controls the unsupported mLib memory tracker.  The
dnl		following are defined:
dnl
dnl		  --enable-track	  turns on malloc tracking
dnl		  --enable-blame-PROGRAM  tracks malloc contexts in PROGRAM
dnl
dnl		There must be  a separate `blame' option for each program,
dnl		so that the various blame options in a hierarchy get
dnl		propagated properly.  This is an obsolete feature from the
dnl		days when mLib was provided as a subdirectory of other
dnl		packages.

AC_DEFUN([mdw_OPT_mLib_TRACK],
[AC_REQUIRE([mdw_OPT_TRACE])
AC_ARG_ENABLE(track,
[  --enable-track          enable tracking of malloc and free],
[AC_DEFINE([TRACK_ENABLE], [1], 
           [Define to turn on memory tracking.  Doesn't work properly.])])
AC_ARG_ENABLE(blame-$1,
[  --enable-blame-$1
                          track malloc contexts while in $1],
[AC_DEFINE([TRACK_BLAME], [1],
           [Define to track mallocs in this code.])])])

dnl --- *@-mdw_OPT_mLib_DEBUG-@* ---
dnl
dnl Author:	Mark Wooding
dnl
dnl Synopsis:	mdw_OPT_mLib_DEBUG(PROGRAM)
dnl
dnl Arguments:	PROGRAM = name of this program or package.
dnl
dnl Use:	Provides all of the above debugging options.

AC_DEFUN([mdw_OPT_mLib_DEBUG],
[AC_REQUIRE([mdw_OPT_NDEBUG])
AC_REQUIRE([mdw_OPT_mLib_TRACK], [mdw_OPT_mLib_TRACK([$1])])])

dnl --- *@-mdw_DEFINE_PATHS-@*
dnl
dnl Author:	Mark Wooding
dnl
dnl Synopsis:	mdw_DEFINE_PATHS(CODE)
dnl
dnl Arguments:	CODE = shell script code to execute
dnl
dnl Use:	Fixes up various variables so that pathname defines can be
dnl		defined.  Within CODE, you may use the following macros:
dnl
dnl		mdw_PROG(NAME)		Transformed program name
dnl
dnl		mdw_PATH(PATH)		Expanded path (may contain variables)
dnl
dnl		mdw_DEFINE_PROG(SYMBOL, PROG)
dnl					Define a symbol as a transformed
dnl					program name.
dnl
dnl		mdw_DEFINE_PATH(SYMBOL, NAME)
dnl					Define a symbol as an expanded path

AC_DEFUN([mdw_DEFINE_PATHS],
[mdw_prefix=$prefix mdw_exec_prefix=$exec_prefix
mdw_transform=`echo "$program_transform_name"|sed 's,\\\\\\\\,\\\\,g; s,\\$\\$,$,g'`
test "$prefix" = "NONE" && prefix=$ac_default_prefix
test "$exec_prefix" = "NONE" && exec_prefix=$prefix
$1
prefix=$mdw_prefix exec_prefix=$mdw_exec_prefix])

AC_DEFUN([mdw_PROG], [`echo "$1"|sed "$mdw_transform"`])
AC_DEFUN([mdw_PATH], [dnl
`t="$1"; dnl
while :; do dnl
case "$t" in dnl
*\\$[]*) t=\`eval echo "$t"\`;; dnl
*) break;; dnl
esac; done; dnl
echo "$t"`])
AC_DEFUN([mdw_DEFINE_PROG], 
         [AC_DEFINE_UNQUOTED([$1], ["mdw_PROG([$2])"],
                             [Program name for $2.])])
AC_DEFUN([mdw_DEFINE_PATH], [AC_DEFINE_UNQUOTED([$1], ["mdw_PATH([$2])"],
                                                [Pathname for $2.])])

dnl --- *@-mdw_DIR_TEXMF-@* ---
dnl
dnl Author:	Mark Wooding
dnl
dnl Synopsis:	mdw_DIR_TEXMF
dnl
dnl Arguments:	---
dnl
dnl Use:	Sets the substitution `texmfdir' as a sensible TeX install
dnl		tree.

AC_DEFUN([mdw_DIR_TEXMF], [
AC_ARG_WITH([texmfdir], 
[  --with-texmfdir=DIR     set the TeX install directory to DIR],
[texmfdir=$withval],
[AC_MSG_CHECKING([where to put installed TeX files])
mdw_DEFINE_PATHS([
texmfdir='${datadir}/texmf'
for d in \
  '${datadir}/texmf' '${prefix}/lib/texmf' \
  '${prefix}/texmf' '${libdir}/lib/texmf'; do
  if test -d "mdw_PATH([$d])"; then
    texmfdir=$d
    break
  fi
done
AC_MSG_RESULT([$texmfdir])])])
AC_SUBST(texmfdir)])

dnl --- *@-mdw_MANEXT-@* ---
dnl
dnl Author:	Mark Wooding
dnl
dnl Synopsis:	mdw_MANEXT
dnl
dnl Arguments:	---
dnl
dnl Use:	Sets the substitution `manext' for man page extensions.

AC_DEFUN([mdw_MANEXT], [
AC_ARG_WITH([man-ext],
[  --with-man-ext=EXT      give manpages the EXT extension (e.g., foo.3EXT)],
[manext=$withval], [manext=mLib])
AC_SUBST(manext)])

dnl----- That's all, folks --------------------------------- *@--GLOB-END--@*