mc/configure.in

dnl
dnl Configure.in file for the Midnight Commander
dnl
AC_INIT(create_vcs)
AC_CONFIG_HEADER(config.h)

PACKAGE=mc
VERSION=4.5.30
AC_DEFINE_UNQUOTED(PACKAGE, "$PACKAGE")
AC_DEFINE_UNQUOTED(VERSION, "$VERSION")
AC_SUBST(VERSION)
AC_SUBST(PACKAGE)

dnl This is path where we're looking for headers in addition to /usr/include
dnl and whatever cpp defaults to.
include_additional_path="/usr/local/include /usr/contrib/include /opt/gnu/include"

dnl This sets/resets compiling with -g by default. It should be set to yes for
dnl development versions and set to no for release versions.
use_cc_g_flag=yes

dnl We want autoconf to check whether -g is available
dnl We reset it back soon.
CCOPTS="$CFLAGS"
unset CFLAGS

AC_PROG_MAKE_SET
AC_PROG_CC
AC_PROG_CPP
AC_PROG_RANLIB
AC_PROG_LN_S
AC_PROG_AWK
if test x"$AWK" = x; then
    AWK=":"
    AWK_VAR_OPTION=""
    dep=slowdep
else
    dep=fastdep

    # test whether awk needs -v for variables (e.g. Solaris) or not (e.g. SunOs 4)
    if test x"`echo | $AWK 'BEGIN { print variable; exit }' variable=123`" = x123; then
        AWK_VAR_OPTION=""
    else
        AWK_VAR_OPTION="-v"
    fi
fi
AC_SUBST(AWK_VAR_OPTION)
AC_SUBST(dep)
AC_PROG_GNU_MAKE

AC_AIX
AC_MINIX
AC_ISC_POSIX
MC_HPUX_PROG_CC_STDC
AC_HEADER_MAJOR
AC_C_CONST
AC_PATH_PROG(MV, mv, mv)
AC_PATH_PROG(CP, cp, cp)
AC_PATH_PROG(RM, rm, rm)
AC_PATH_PROG(CHMOD, chmod, :)
AC_PATH_PROG(AR, ar, ar)

AC_CHECK_PROG(system,uname,`uname`,unknown)
AC_CHECK_PROGS(X11_WWW,netscape arena Mosaic chimera)
if test x"$X11_WWW" = x; then
    X11_WWW=lynx
fi

ALL_LINGUAS="cs da de es es_ES fr it ko no pl ru ro"
AM_GNU_GETTEXT
AC_LINK_FILES($nls_cv_header_libgt, $nls_cv_header_intl)

dnl
dnl This part supplies reasonable defaults for CFLAGS, if they weren't
dnl specified by ''CFLAGS=flags ./configure''
dnl
cc_uses_g=yes
if test x$GCC = xyes; then
    if test x$ac_cv_prog_gcc_g = xyes; then
	:
    else
	cc_uses_g=no
    fi
fi

dnl Debug mode is turned ON for now
if test "x$CCOPTS" = x; then
    CCOPTS='-g'
fi

if test "x$CCOPTS" = x; then
    if test x$GCC = xyes; then
        if test x$system = xLinux; then
            CCOPTS='-O2 -fno-strength-reduce'
	    if test x$use_cc_g_flag = xyes; then
		if test $cc_uses_g = yes; then
		    CCOPTS='-g -O'
		fi
	    fi
	else
            CCOPTS='-O'
	    if test x$use_cc_g_flag = xyes; then
		if test $cc_uses_g = yes; then
		    CCOPTS='-g -O'
		fi
	    fi
	fi
    else
	if test x$use_cc_g_flag = xyes; then
	    CCOPTS="$CFLAGS"
	else
	    CCOPTS=
	fi
    fi
fi
CFLAGS="$CCOPTS"


dnl
dnl We now use glib
dnl 
AM_PATH_GLIB(1.2.0,,AC_MSG_ERROR(Test for GLIB failed.  MC requires GLIB.))
LIBS="$LIBS $GLIB_LIBS"
CFLAGS="$CFLAGS $GLIB_CFLAGS"

dnl
dnl For A/UX.  Do not move
dnl

posix_libs=""
if test $system = A/UX
then
    posix_libs="-lposix"
    AC_DEFINE(_POSIX_SOURCE)
fi

AC_PROG_INSTALL
AC_CHECK_HEADERS(unistd.h string.h memory.h crypt.h grp.h limits.h malloc.h)
AC_CHECK_HEADERS(stdlib.h termios.h utime.h fcntl.h sys/statfs.h)

if test x$ac_cv_header_malloc_h = xno; then
    echo '/* NeXTStep malloc.h stub */' > $srcdir/malloc.h
fi

AC_HEADER_SYS_WAIT
AC_HEADER_DIRENT
AC_SHORT_D_NAME_LEN
AC_HEADER_STDC


#Let me check for an incompatible regcomp in HP-UX before making this
#the default

REGEX_O="regex.o"
AC_SUBST(REGEX_O)

dnl Missing structure components
AC_STRUCT_ST_BLKSIZE
AC_STRUCT_ST_BLOCKS
AC_STRUCT_ST_RDEV

dnl
dnl Check availability of some functions 
dnl 

AC_CHECK_FUNCS(strerror statfs getwd strcasecmp strncasecmp)
AC_CHECK_FUNCS(strdup memmove pwdauth truncate initgroups putenv)
AC_CHECK_FUNCS(memset memcpy tcsetattr tcgetattr cfgetospeed)
AC_CHECK_FUNCS(sigaction sigemptyset sigprocmask sigaddset)
AC_CHECK_FUNCS(sysconf setuid setreuid)

SHADOWLIB=
if test x$system = xLinux; then
AC_CHECK_LIB(shadow,pw_encrypt,[
shadow_header=no
AC_CHECK_HEADERS(shadow.h)
if test x$ac_cv_header_shadow_h = xyes; then
    shadow_header=yes
else
AC_CHECK_HEADERS(shadow/shadow.h)
    if test x$ac_cv_shadow_shadow_h = xyes; then
        shadow_header=yes
    fi
fi
if test $shadow_header = yes; then
    AC_DEFINE(LINUX_SHADOW)
    SHADOWLIB=-lshadow
fi
])
fi
AC_SUBST(SHADOWLIB)

NEED_CRYPT_PROTOTYPE=yes
if test x$ac_cv_header_crypt_h = xyes; then
AC_TRY_WARNINGS([#include <crypt.h>], [char *p = crypt("xxx", "yyy");],[
NEED_CRYPT_PROTOTYPE=no])
else 
    if test x$ac_cv_header_unistd_h = xyes; then
AC_TRY_WARNINGS([#include <unistd.h>], [char *p = crypt("xxx", "yyy");],[
NEED_CRYPT_PROTOTYPE=no])
    fi
fi
if test x$NEED_CRYPT_PROTOTYPE=xyes; then
AC_DEFINE(NEED_CRYPT_PROTOTYPE)
fi

dnl
dnl AIX and Sequent need <sys/select.h> for fd_set
dnl
AC_CHECK_HEADERS(sys/select.h)

dnl
dnl On SCO and some SVR4, crypt is on libcrypt.a
dnl         grantpt in  libpt.a
dnl
LCRYPT=""
AC_CHECK_FUNCS(crypt, , [
    AC_CHECK_LIB(crypt, crypt, LCRYPT="-lcrypt",[
	AC_CHECK_LIB(crypt_i, crypt, LCRYPT="-lcrypt_i")])])
AC_SUBST(LCRYPT)

dnl This is the correct version
dnl AC_CHECK_FUNCS(grantpt, , AC_CHECK_LIB(pt, grantpt))
dnl
dnl And workaround for a Autoconf 2.4 bug:
AC_CHECK_FUNCS(grantpt)
if test x$ac_cv_func_grantpt = xyes; then
    :
else
    AC_CHECK_LIB(pt, grantpt)
fi

dnl
dnl libintl.a required on SCO to provide proper NLS support
dnl (using native cc links it by default)
dnl
if test x$GCC = xyes; then
    AC_CHECK_LIB(intl, tolower)
fi

dnl replacing lstat with statlstat on sco makes it more portable between
dnl sco clones
AC_CHECK_FUNCS(statlstat)

dnl
dnl If running under AIX, AC_AIX does not tell us that
dnl
AC_MSG_CHECKING(for AIX defines)
AC_EGREP_CPP(yes,
[#if defined(AIX) || defined(_AIX) || defined(__aix__) || defined(aix)
yes
#endif
], [
AC_DEFINE(IS_AIX)
AC_MSG_RESULT(yes)
], AC_MSG_RESULT(no))

dnl   
dnl This hack is here until autoconf adds it
dnl Needed for Unixware: getmntent is on libgen.a
dnl
AC_CHECK_LIB(gen, getmntent, [LIBS="-lgen $LIBS"])

dnl
dnl This is from GNU fileutils, check aclocal.m4 for more information
dnl
AC_GET_FS_INFO

dnl
dnl Missing typedefs and replacements
dnl 

AC_TYPE_MODE_T
AC_CHECK_TYPE(umode_t, int)
AC_CHECK_TYPE(off_t, long)
AC_TYPE_PID_T
AC_TYPE_UID_T
AC_CHECK_TYPE(nlink_t, unsigned int)

AC_FUNC_MMAP
AC_FUNC_ALLOCA

dnl
dnl Cool hack, but we don't use it currently 
dnl
dnl AC_MSG_CHECKING(for token pasting method)
dnl AC_EGREP_CPP(portable,[
dnl #define tken(a, b) a##b
dnl tken(port, able)
dnl ], [AC_DEFINE(HAVE_PORTABLE_TOKEN_PASTING)
dnl AC_MSG_RESULT(portable)
dnl ], [
dnl AC_MSG_RESULT(non-portable)
dnl ])

AC_PATH_XTRA

dnl
dnl X11 support in the textmode edition. 
dnl

dnl These variables are only used when building the text edition MC binary
MCCFLAGS=""
MCLIBS=""
AC_SUBST(MCCFLAGS)
AC_SUBST(MCLIBS)

textmode_x11_support="no"
AC_ARG_WITH(tm-x-support,
	[--with-tm-x-support        Add X Window System support to the text edition],
	if test x$withval = xyes; then
		MCCFLAGS="$X_CFLAGS"
		MCLIBS="$X_LIBS $X_PRE_LIBS -lX11 $X_EXTRA_LIBS"
		AC_DEFINE(HAVE_TEXTMODE_X11_SUPPORT)
		textmode_x11_support="yes"
	fi
)

dnl
dnl Network related functions
dnl

AC_CHECK_LIB(nsl, t_accept)
AC_CHECK_LIB(socket, socket)

have_socket=no
AC_CHECK_FUNCS(socket, have_socket=yes)
if test $have_socket = no; then
  # socket is not in the default libraries.  See if it's in some other.
  for lib in bsd socket inet; do
    AC_CHECK_LIB($lib, socket, [
        LIBS="$LIBS -l$lib"
	have_socket=yes
	AC_DEFINE(HAVE_SOCKET)
	break])
  done
fi

have_gethostbyname=no
AC_CHECK_FUNC(gethostbyname, have_gethostbyname=yes)
if test $have_gethostbyname = no; then
  # gethostbyname is not in the default libraries.  See if it's in some other.
  for lib in bsd socket inet; do
    AC_CHECK_LIB($lib, gethostbyname, [LIBS="$LIBS -l$lib"; have_gethostbyname=yes; break])
  done
fi

AC_CHECK_FUNCS(socketpair)

dnl
dnl Sequent wants getprocessstats
dnl
AC_CHECK_LIB(seq, get_process_stats, [
	LIBS="$LIBS -lseq"
	AC_DEFINE(HAVE_GET_PROCESS_STATS)])

GNOME_VFS_CHECKS
NETFILES=
if test $have_socket = yes; then
   NETFILES="\$(NETFILES)"
fi
AC_SUBST(NETFILES)

LIBVFS=""
LVFS=""
fastdepvfs=""
vfs_type="normal"
if test $use_vfs = yes
then
	LIBVFS="libvfs-mc.a"
	LVFS="-lvfs-mc"
	fastdepvfs=fastdepvfs
	MCCPPFLAGS="$MCCPPFLAGS -I\$(vfsdir)"
	AC_MSG_RESULT(Using the VFS switch code)
	vfs_type="Midnight Commander Virtual File System"
fi
AC_SUBST(LIBVFS)
AC_SUBST(LVFS)
AC_SUBST(fastdepvfs)

screen_manager=unknown
search_ncurses=false

CFLAGS=${CFLAGS--O}
LDFLAGS=${LDFLAGS--O}

AC_DEFUN(AC_USE_SUNOS_CURSES, [
	search_ncurses=false
	screen_manager="SunOS 4.x /usr/5include curses"
	AC_MSG_RESULT(Using SunOS 4.x /usr/5include curses)
	AC_DEFINE(USE_SUNOS_CURSES)
	AC_DEFINE(NO_COLOR_CURSES)
	AC_DEFINE(USE_SYSV_CURSES)
	CPPFLAGS="$CPPFLAGS -I/usr/5include"
	XCURSES="xcurses.o /usr/5lib/libcurses.a /usr/5lib/libtermcap.a"
	AC_MSG_RESULT(Please note that some screen refreshs may fail)
	AC_WARN(Reconsider using Slang)
])

AC_DEFUN(AC_USE_OSF1_CURSES, [
       AC_MSG_RESULT(Using OSF1 curses)
       search_ncurses=false
       screen_manager="OSF1 curses"
       AC_DEFINE(NO_COLOR_CURSES)
       AC_DEFINE(USE_SYSV_CURSES)
       XCURSES="xcurses.o"
       LIBS="$LIBS -lcurses"
])

AC_DEFUN(AC_USE_SYSV_CURSES, [
	AC_MSG_RESULT(Using SysV curses)
	AC_DEFINE(USE_SYSV_CURSES)
	XCURSES=""
	search_ncurses=false
	screen_manager="SysV/curses"
	LIBS="$LIBS -lcurses"
])

XCURSES=""
AC_SUBST(XCURSES)

dnl AC_ARG_WITH(bsd-curses,
dnl [--with-bsd-curses         Used to compile with bsd curses, not very fancy],
dnl 	search_ncurses=false
dnl	screen_manager="Ultrix/cursesX"
dnl	if test $system = ULTRIX
dnl	then
dnl	    THIS_CURSES=cursesX
dnl        else
dnl	    THIS_CURSES=curses
dnl	fi
dnl
dnl	LIBS="$LIBS -l$THIS_CURSES -ltermcap"
dnl	AC_DEFINE(USE_BSD_CURSES)
dnl	XCURSES="xcurses.o"
dnl	AC_MSG_RESULT(Please note that some screen refreshs may fail)
dnl	AC_WARN(Use of the bsdcurses extension has some)
dnl	AC_WARN(display/input problems.)
dnl	AC_WARN(Reconsider using xcurses)
dnl)

AC_ARG_WITH(sco,
	[--with-sco                 Use this to turn on SCO-specific code],[
	if test x$withval = xyes; then
		AC_DEFINE(SCO_FLAVOR)
		CFLAGS="$CFLAGS -D_SVID3"
	fi
])

AC_ARG_WITH(sunos-curses,
	[--with-sunos-curses        Used to force SunOS 4.x curses],[
	if test x$withval = xyes; then
		AC_USE_SUNOS_CURSES
	fi
])

AC_ARG_WITH(osf1-curses,
	[--with-osf1-curses	   Used to force OSF/1 curses],[
	if test x$withval = xyes; then
		AC_USE_OSF1_CURSES
	fi
])

AC_ARG_WITH(vcurses,
	[--with-vcurses[=incdir]    Used to force SysV curses],
	if test x$withval = xyes; then
		CPPFLAGS="$CPPFLAGS"
        else
		CPPFLAGS="$CPPFLAGS -I$withval"
	fi
	AC_USE_SYSV_CURSES
)

mouse_lib="xterm only"
LGPM=""
AC_ARG_WITH(gpm-mouse, 
	[--with-gpm-mouse[=base-dir]  Compile with gpm mouse support],[
	if test x$withval != xno
	then
		if test x$withval != xyes
		then
			LIBS="$LIBS -L$withval/lib"
			CPPFLAGS="$CPPFLAGS -I$withval/include"
		fi
		AC_DEFINE(HAVE_LIBGPM)
		mouse_lib="GPM and xterm"
		LGPM="-lgpm"
	fi
	],[
	AC_CHECK_LIB(gpm, Gpm_Repeat,[
		AC_DEFINE(HAVE_LIBGPM)
		mouse_lib="GPM and xterm"
		LGPM="-lgpm"],[
		if test $system = Linux
		then 
			AC_MSG_WARN("libgpm.a is missing or older than 0.18")
		fi
		], $LIBS)
	]
)
AC_SUBST(LGPM)

AC_ARG_WITH(ncurses,
	[--with-ncurses[=base-dir]    Compile with ncurses/locate base dir],
	if test x$withval = xyes
	then
		search_ncurses=true
	else
		LIBS="$LIBS -L$withval/lib -lncurses"
		CPPFLAGS="$CPPFLAGS -I$withval/include"
		search_ncurses=false
		screen_manager="ncurses"
		AC_DEFINE(USE_NCURSES)
	fi
)

AC_ARG_WITH(hsc,
        [--with-hsc               Compile with support for the HSC firewall],
        if test x$withval = xyes; then
                AC_DEFINE(HSC_PROXY)
        fi
)

dnl
dnl Check for Gnome
dnl
mx=""
gmcdep=""
libgtkedit=""

AC_SUBST(insticons)
GNOME_INIT_HOOK([
	mx=mx
 	gmcdep=gmcdep
	libgtkedit="libgtkedit.a"
	insticons=install_icons
	if test x"$xvers" = xnone; then
	    xvers="Gnome"
	else
	    xvers="Gnome+$xvers"
	fi
	gnomeicondir=`gnome-config --prefix`/share/pixmaps
])
AC_SUBST(gnomeicondir)
AC_SUBST(mx)
AC_SUBST(gmcdep)
AC_SUBST(libgtkedit)
AC_SUBST(GNOMEGNORBA_LIBS)

dnl
dnl Check for the -mandoc package
dnl
AC_CHECK_PROG(HAVE_nroff, nroff, true, false)
if $HAVE_nroff; then
    AC_MSG_CHECKING(for manual formatting macros)
    AC_CACHE_VAL(ac_cv_mandoc, [
    nroff -mandoc < /dev/null > /dev/null 2>&1 /dev/null
    if test $? = 0
    then
	ac_cv_mandoc=-mandoc
    else
	ac_cv_mandoc=-man
    fi
    ])
    MANDOC=$ac_cv_mandoc
    AC_MSG_RESULT($MANDOC)
else
    MANDOC=-man
fi
AC_SUBST(MANDOC)

dnl
dnl Check if nroff accepts -Tascii
dnl
if $HAVE_nroff; then
    AC_MSG_CHECKING(If nroff accepts -Tascii)
    AC_CACHE_VAL(ac_cv_nroff_tascii, [
    nroff -Tascii < /dev/null > /dev/null 2>&1 /dev/null
    if test $? = 0
    then
	ac_cv_nroff_tascii=" -Tascii"
        AC_MSG_RESULT(yes)
    else
	ac_cv_nroff_tascii=""
        AC_MSG_RESULT(no)
    fi
    ])
fi
TROFFASCII="$ac_cv_nroff_tascii"
AC_SUBST(TROFFASCII)

dnl
dnl Check for - option to file
dnl
AC_CHECK_PROG(HAVE_FILECMD, file, true, false)
if $HAVE_FILECMD; then
    AC_MSG_CHECKING(for - option to file command)
    AC_CACHE_VAL(ac_cv_filestdin, [
    cat > conftest.c <<EOF
/* A comment */
#if 0
#endif
void main(void)
{ return; }
EOF
    changequote(, )
    cat > conftest.sed <<EOF
s/^[^:]*:[\ \	]*//
s/[\ \	]*$//
EOF
    filehyphen_1=`file conftest.c 2>/dev/null | sed -f conftest.sed`
    filehyphen_2=`cat conftest.c | file - 2>/dev/null | sed -f conftest.sed`
    if test "$filehyphen_1" = "$filehyphen_2"; then
	ac_cv_filestdin=yes
    else
	ac_cv_filestdin=no
    fi
    changequote([, ])
    rm conftest.c conftest.sed
    unset filehyphen_1
    unset filehyphen_2
    ])

    if test x$ac_cv_filestdin = xyes; then
	AC_DEFINE(FILE_STDIN)
    fi
    filestdin=$ac_cv_filestdin
    AC_MSG_RESULT($filestdin)

    dnl
    dnl Check for -L option to file
    dnl

AC_MSG_CHECKING(for -L option to file command)
AC_CACHE_VAL(ac_cv_filel, [
file -L . > /dev/null 2>&1
if test $? = 0
then
    ac_cv_filel=yes
else
    ac_cv_filel=no
fi
])
if test x$ac_cv_filel = xyes; then
    AC_DEFINE(FILE_L)
fi
filel=$ac_cv_filel
AC_MSG_RESULT($filel)
fi 

dnl
dnl Check to see if grep program allowes dash to denote stdin 
dnl
AC_MSG_CHECKING(for - option to grep command)
AC_CACHE_VAL(ac_cv_grep_stdin, [
    grep ac_cv_grep_stdin - > /dev/null 2>&1 < ./configure
    if test $? = 0; then
	ac_cv_grep_stdin=yes
    else
	ac_cv_grep_stdin=no
    fi
])
if test x$ac_cv_grep_stdin = xyes; then
    AC_DEFINE(GREP_STDIN)
fi
AC_MSG_RESULT($ac_cv_grep_stdin)

dnl
dnl The subshell support
dnl

AC_MSG_CHECKING(for subshell support)
AC_ARG_WITH(subshell,
	[--with-subshell            If you want to use a concurrent shell],
	result=no
	if test x$withval = xoptional
	then
		AC_DEFINE(SUBSHELL_OPTIONAL)
		AC_DEFINE(HAVE_SUBSHELL_SUPPORT)
		result="optional"
	fi
	if test x$withval = xyes
        then 
		AC_DEFINE(HAVE_SUBSHELL_SUPPORT)
		result="yes"
	fi,
	dnl Default: provide the subshell support on non-ultrix machines
	if test $system = ULTRIX	
	then
		result=no
	else
		AC_DEFINE(HAVE_SUBSHELL_SUPPORT)
		result=yes
	fi
)
AC_MSG_RESULT($result)
subshell="$result"

dnl
dnl Check for GCC
dnl
if test x$GCC = x
then
	AC_DEFINE(OLD_TOOLS)
	CPPFLAGS="$CPPFLAGS"
fi

dnl
dnl This option is only inteded for being used by me :-)
dnl It has some nasty hacks built in.
dnl
mem_debug="none"
AC_ARG_WITH(debug, 
[--with-debug               For use by developers only: activates -Wall and MAD],
	[if test x$withval = xyes; then
	CFLAGS="$CFLAGS -Wall"
	mem_debug="Janne's MAD library"
	AC_DEFINE(HAVE_MAD)
	AC_DEFINE(MCDEBUG)
	if [ echo `uname -s -r` | grep -q 'SunOS 4.1' ]
	then
    	    CFLAGS="$CFLAGS -Wno-implicit"
        fi
	if echo "$CFLAGS" | grep -e -g >/dev/null 2>&1; then
		:
	else
	    if test $cc_uses_g = yes; then
		CFLAGS="$CFLAGS -g"
	    fi
	fi
	AC_MSG_RESULT(compiling with -Wall and the memory leak detector)
fi])

dnl
dnl This option is only inteded for being used by me :-)
dnl It has some nasty hacks built in.
dnl
AC_ARG_WITH(efence, 
[--with-efence              Developers only: activates -Wall and efence],
	[if test x$withval = xyes; then
	CFLAGS="$CFLAGS -Wall"
	AC_DEFINE(MCDEBUG)
	LIBS="$LIBS -lefence"
	if [ echo `uname -s -r` | grep -q 'SunOS 4.1' ]
	then
    	    CFLAGS="$CFLAGS -Wno-implicit"
        fi
	if echo "$CFLAGS" | grep -e -g >/dev/null 2>&1; then
		:
	else
	    if test $cc_uses_g = yes; then
		CFLAGS="$CFLAGS -g"
	    fi
	fi
	AC_MSG_RESULT(compiling with -Wall and Electric fence)
	mem_debug="Electric Fence"
fi])

INTLSUB=""
LINTL=""
if test x$USE_NLS = xyes; then
    if test x$USE_INCLUDED_LIBINTL = xyes; then
	CPPFLAGS="$CPPFLAGS -I\$(builddir)/intl"
	LINTL="-L\$(builddir)/intl -lintl"
    fi
    INTLSUB=intl
fi
AC_SUBST(INTLSUB)
AC_SUBST(LINTL)

dnl
dnl To force mmap support
dnl We use only part of the functionality of mmap, so on AIX,
dnl it's possible to use mmap, even if it doesn't pass the autoconf test.
dnl
AC_ARG_WITH(mmap, 
	[--with-mmap                To force using the mmap call (AIX)],
	[if test x$withval = xyes; then
	AC_DEFINE(HAVE_MMAP)
        AC_MSG_RESULT(forcing MMAP support)
fi])

AC_DEFUN(AC_USE_TERMINFO,
	AC_DEFINE(SLANG_TERMINFO)
	AC_MSG_RESULT(Using SLang screen manager/terminfo)
	slang_term=" with terminfo"
)

AC_DEFUN(AC_USE_TERMCAP,
	AC_MSG_RESULT(Using SLang screen manager/termcap)
	AC_DEFINE(USE_TERMCAP)
	dnl Check with $LIBS at the end so that it works with ELF libs.
	AC_CHECK_LIB(termcap, tgoto, LIBS="$LIBS -ltermcap", , $LIBS)
	slang_term=" with termcap"
)
	
slang_check_lib=true
slang_term=""
slang_use_system_installed_lib=false
AC_CHECK_LIB(slang,SLang_init_tty,
	AC_CHECK_HEADERS(slang.h)
	if test x$ac_cv_header_slang_h = xyes
	then
             slang_use_system_installed_lib=true
	     slang_check_lib=false
        else
	     AC_CHECK_HEADERS(slang/slang.h)
	     if test x$ac_cv_header_slang_slang_h = xyes
	     then
		 slang_use_system_installed_lib=true
		 slang_check_lib=false
	         AC_DEFINE(SLANG_H_INSIDE_SLANG_DIR)
	     fi
	fi
)

AC_ARG_WITH(terminfo,
        [--with-terminfo            SLANG: Force usage of terminfo],[
	if test x$withval = xyes; then
		AC_USE_TERMINFO
		slang_check_lib=false
		slang_use_system_installed_lib=false
	fi]
)

AC_ARG_WITH(termcap,
	[--with-termcap             SLANG: Force usage of termcap],[
	if test x$withval = xyes; then
		AC_USE_TERMCAP
		slang_check_lib=false
		slang_use_system_installed_lib=false
	fi]
)

AC_ARG_WITH(included-slang,
	[--with-included-slang      SLANG: use the SLang library included here],[
	if test x$withval = xyes; then
	    slang_use_system_installed_lib=false
	    slang_check_lib=true
	fi]
)

AC_DEFUN(AC_WITH_SLANG,[
	AC_DEFINE(HAVE_SLANG)
	search_ncurses=false
	if $slang_use_system_installed_lib
	then
	    AC_DEFINE(HAVE_SYSTEM_SLANG)
	    LSLANG="-lslang"
	    screen_manager="SLang (system-installed library)"
	    AC_MSG_RESULT(Using system installed SLang library)
	    rm -f slang/slang.h
	    ac_save_LIBS="$LIBS"
	    LIBS="$LIBS $LSLANG"
	    AC_TRY_RUN(
	    [ 
	    #ifdef SLANG_H_INSIDE_SLANG_DIR
	    #include <slang/slang.h>
	    #else
	    #include <slang.h>
	    #endif
	    int main(void){
		SLtt_get_terminfo();
		SLtt_tgetflag("");
		return 0;
	    } ], 
	    [LIBS="$ac_save_LIBS"; AC_USE_TERMINFO], 
	    [LIBS="$ac_save_LIBS"; AC_USE_TERMCAP])
	else
	    MCCPPFLAGS="$MCCPPFLAGS -I\$(slangdir)"
    	    LIBSLANG="libmcslang.a"
	    screen_manager="SLang"
	    LSLANG="-lmcslang"
	    CPPFLAGS="$CPPFLAGS -I../slang"
	    fastdepslang=fastdepslang
	    mkdir -p slang
	    case "$srcdir" in
		/*) ln -sf  $srcdir/slang/slang-mc.h slang/slang.h;;
		*)  ln -sf  ../$srcdir/slang/slang-mc.h slang/slang.h;;
	    esac
	fi
	if $slang_check_lib
	then
	    use_terminfo=false
	    for dir in 	/usr/lib /usr/share/lib /usr/local/lib /lib \
			/usr/local/share /usr/share
	    do
		if test -d $dir/terminfo; then
		use_terminfo=true; 
		break
		fi
	    done
	    if $use_terminfo; then
		AC_USE_TERMINFO
	    else
		AC_USE_TERMCAP
	    fi
        fi]
)

LIBSLANG=""
LSLANG=""
fastdepslang=""
AC_ARG_WITH(slang,
	[--with-slang		   Compile with the slang screen manager],[
	if test x$withval = xyes; then
		AC_WITH_SLANG
	fi
])

AC_SUBST(LIBSLANG)
AC_SUBST(LSLANG)
AC_SUBST(fastdepslang)

AC_DEFUN(AC_WITH_EDIT, [
	AC_DEFINE(USE_INTERNAL_EDIT)
	LIBEDIT_A="libedit.a"
	MCEDIT="mcedit"
	LEDIT="-ledit"
	CPPFLAGS="$CPPFLAGS -I\$(rootdir)"
	EDIT_msg="yes"
	AC_MSG_RESULT(will call internal editor)
])

LIBEDIT_A=""
MCEDIT=""
LEDIT=""
EDIT_msg=""
AC_ARG_WITH(edit,
        [--with-edit                Define INTERNAL_EDIT],
	if test x$withval = xyes
	then
		AC_WITH_EDIT
	else
		EDIT_msg="no"
	fi, 
	dnl Default: provide the internal editor
	AC_WITH_EDIT
)
AC_SUBST(LIBEDIT_A)
AC_SUBST(MCEDIT)
AC_SUBST(LEDIT)

AC_ARG_WITH(netrc,
	[--with-netrc               Compile with ftp .netrc support],[
	if test x$withval = xyes; then
		AC_DEFINE(USE_NETRC)
		AC_MSG_RESULT(ftpfs will have .netrc parsing code)
	fi
])

undelfs_o=""
AC_DEFUN(AC_EXT2_UNDEL, [
  GNOME_UNDELFS_CHECKS
  if test "$ext2fs_undel" = yes; then
     AC_MSG_RESULT(With ext2fs file recovery code)
     vfs_flags="${vfs_flags} undelfs"
     undelfs_o="undelfs.o"
     LIBS="$LIBS $EXT2FS_UNDEL_LIBS"
  else
     AC_MSG_WARN(No ext2fs file recovery code)
  fi
])

AC_ARG_WITH(ext2undel,
        [--with-ext2undel           Compile with ext2 undelete code],[
	if test x$withval != xno;
	then
		if test x$withval != xyes
		then
			LIBS="$LIBS -L$withval/lib"
			CPPFLAGS="$CPPFLAGS -I$withval/include"
		fi
		AC_EXT2_UNDEL
	fi],
	dnl Default: detect
	AC_CHECK_LIB(ext2fs, ext2fs_close, AC_EXT2_UNDEL,,-lcom_err)
)

AC_SUBST(undelfs_o)
	
dnl
dnl Parameters: directory filename LIBS_append CPPFLAGS_append nicename
dnl
AC_DEFUN(AC_NCURSES, [
    if $search_ncurses
    then
        if test -f $1/$2
	then
	    AC_MSG_RESULT(Found ncurses on $1/$2)
 	    LIBS="$LIBS $3"
	    CPPFLAGS="$CPPFLAGS $4"
	    search_ncurses=false
	    screen_manager=$5
	    AC_DEFINE(USE_NCURSES)
	fi
    fi
])

if $search_ncurses
then
    AC_CHECKING("location of ncurses.h file")

    AC_NCURSES(/usr/include, ncurses.h, -lncurses,, "ncurses on /usr/include")
    AC_NCURSES(/usr/include/ncurses, ncurses.h, -lncurses, -I/usr/include/ncurses, "ncurses on /usr/include/ncurses")
    AC_NCURSES(/usr/local/include, ncurses.h, -L/usr/local/lib -lncurses, -I/usr/local/include, "ncurses on /usr/local")
    AC_NCURSES(/usr/local/include/ncurses, ncurses.h, -L/usr/local/lib -L/usr/local/lib/ncurses -lncurses, -I/usr/local/include/ncurses, "ncurses on /usr/local/include/ncurses")

    AC_NCURSES(/usr/local/include/ncurses, curses.h, -L/usr/local/lib -lncurses, -I/usr/local/include/ncurses -DRENAMED_NCURSES, "renamed ncurses on /usr/local/.../ncurses")

    AC_NCURSES(/usr/include/ncurses, curses.h, -lncurses, -I/usr/include/ncurses -DRENAMED_NCURSES, "renamed ncurses on /usr/include/ncurses")

    dnl
    dnl We couldn't find ncurses, try SysV curses
    dnl
    if $search_ncurses 
    then
        AC_EGREP_HEADER(init_color, /usr/include/curses.h,
	    AC_USE_SYSV_CURSES)
	AC_EGREP_CPP(USE_NCURSES,[
#include <curses.h>
#ifdef __NCURSES_H
#undef USE_NCURSES
USE_NCURSES
#endif
],[
	CPPFLAGS="$CPPFLAGS -DRENAMED_NCURSES"
        AC_DEFINE(USE_NCURSES)
        search_ncurses=false
        screen_manager="ncurses installed as curses"
])
    fi

    dnl
    dnl Try SunOS 4.x /usr/5{lib,include} ncurses
    dnl The flags USE_SUNOS_CURSES, USE_BSD_CURSES and BUGGY_CURSES
    dnl should be replaced by a more fine grained selection routine
    dnl
    if $search_ncurses
    then
	if test -f /usr/5include/curses.h
	then
	    AC_USE_SUNOS_CURSES
        fi
    else
        # check for ncurses version, to properly ifdef mouse-fix
	AC_MSG_CHECKING(for ncurses version)
	ncurses_version=unknown
cat > conftest.$ac_ext <<EOF
[#]line __oline__ "configure"
#include "confdefs.h"
#ifdef RENAMED_NCURSES
#include <curses.h>
#else
#include <ncurses.h>
#endif
#undef VERSION
VERSION:NCURSES_VERSION
EOF
        if (eval "$ac_cpp conftest.$ac_ext") 2>&AC_FD_CC |
  egrep "VERSION:" >conftest.out 2>&1; then
changequote(,)dnl
            ncurses_version=`cat conftest.out|sed -e 's/^[^"]*"//' -e 's/".*//'`
changequote([,])dnl
	fi
	rm -rf conftext*
        AC_MSG_RESULT($ncurses_version)
	case "$ncurses_version" in
changequote(,)dnl
	4.[01])
changequote([,])dnl
            AC_DEFINE(NCURSES_970530,2)
            ;;
	1.9.9g)
            AC_DEFINE(NCURSES_970530,1)
            ;;
	1*)
            AC_DEFINE(NCURSES_970530,0)
            ;;
	esac
    fi
fi

dnl Ncurses may be linked against libgpm. Change LIBS temporary for
dnl check for resizeterm and keyok.
dnl
SAVED_LIBS="$LIBS"
LIBS="$LIBS $LGPM"
AC_CHECK_FUNCS(resizeterm keyok)
LIBS="$SAVED_LIBS"

if test "x$screen_manager" = "xunknown"; then
    AC_WITH_SLANG
fi

dnl
dnl The variables used for expanding the auto saver.
dnl
saver=""
saver_target=""
vcs=""
install_saver="no"
PAMLIBS=""
if test $system = Linux
then
    saver="install.saver"
    saver_target="cons.saver"
    vcs="install.create_vcs"
    install_saver="yes"

    dnl
    dnl On Linux, check for PAM authentication available
    dnl
    AC_CHECK_LIB(pam, pam_start, [
	AC_DEFINE(HAVE_PAM)
	PAMLIBS="-lpam -ldl"
    ],[],[-ldl])

fi
AC_SUBST(saver_target)
AC_SUBST(saver)
AC_SUBST(vcs)
AC_SUBST(PAMLIBS)

dnl
dnl We need sed in order to fix the library files 
dnl
    SEDCMD="sed 's/-man/$MANDOC/'"
    SEDCMD2="sed 's%@prefix@%\$(prefix)%'"
AC_SUBST(SEDCMD)
AC_SUBST(SEDCMD2)

if test x$no_xview = xyes; then
    :
else
    AC_LIB_XPM
    if test x$ac_cv_has_xpm = xyes; then
	XPM_LIB=-lXpm
	AC_SUBST(XPM_LIB)
	AC_X_SHAPE_EXTENSION
        if test x$ac_cv_has_shape = xyes; then
            AC_DEFINE(HAVE_XPM_SHAPE)
	    XEXT_LIB=-lXext
	    AC_SUBST(XEXT_LIB)
        fi
    fi
fi


dnl
dnl This code should be moved to the ac_WITH_SLANG
dnl
dnl We check for the existance of setupterm on curses library
dnl this is required to load certain definitions on some termcaps
dnl editions (AIX and OSF/1 I seem to remember).
dnl Note that we avoid using setupterm 
case $screen_manager in
changequote(,)dnl
	[Ss][Ll][Aa][Nn][Gg]*)
changequote([, ])dnl
		if test $system = Linux
		then
			echo
		else
		AC_CHECK_LIB(curses,setupterm,[
			AC_TRY_COMPILE([
#include <curses.h>
#include <term.h>],[
   if (key_end == parm_insert_line)
 	return 1;
   return 0;
],[
			LIBS="$LIBS -lcurses"
			AC_DEFINE(USE_SETUPTERM)])])
		fi
		;;
esac

LIBS="$LIBS $posix_libs"

CPPFLAGS="-I.. $CPPFLAGS"
AC_SUBST(CFLAGS)
AC_SUBST(CPPFLAGS)
AC_SUBST(MCCPPFLAGS)
AC_SUBST(LDFLAGS)
AC_SUBST(LIBS)

ac_cv_make_with_percent_rules=no
if test x$ac_cv_prog_gnu_make = xyes; then
    MCFG='include ../Make.common'
    MCFGR='include ./Make.common'
    MCF=/dev/null
    PHONY='.PHONY:'
    DOTDEPEND='ifeq (.depend,$(wildcard .depend)) \
include .depend \
endif'
    WRITEDEP=":"
    ac_cv_make_with_percent_rules=yes
else
    MCFG=""
    MCFGR=""
    MCF=./Make.common
    PHONY='#'
    DOTDEPEND=""
    WRITEDEP='sed "/^. \*\*\*Dependencies\*\*\*/,/^. \*\*\*End of dependencies\*\*\*/d" < Makefile > Makefile.conf; { cat Makefile.conf; echo "# ***Dependencies***Do not edit***"; cat .depend; echo "# ***End of dependencies***" } > Makefile; $(RMF) Makefile.conf .depend'
fi
AC_SUBST(PHONY)
AC_SUBST(WRITEDEP)
AC_SUBST(MCFG)
AC_SUBST(MCFGR)
AC_SUBST(DOTDEPEND)
AC_SUBST_FILE(MCF)

if test x$ac_cv_make_with_percent_rules = xyes; then
    PCENTRULE=""
else
    PCENTRULE="#"
fi
AC_SUBST(PCENTRULE)

AC_SUBST(builddir)
builddir=`pwd`

SHELL=${SHELL-"/bin/sh"}
AC_SUBST(SHELL)

dnl
dnl Output configuration filesn
dnl

AC_OUTPUT([
Make.common 
Makefile 
mc.spec
VERSION
doc/Makefile 
vfs/Makefile:vfs/Make-mc.in
lib/Makefile
gnome/Makefile 
gnome/mc.keys.in
idl/Makefile
src/Makefile
slang/Makefile 
edit/Makefile 
gtkedit/Makefile 
syntax/Makefile
new_icons/Makefile 
icons/Makefile

lib/mc.ext
lib/mc-gnome.ext

mcfn_install
vfs/extfs/ftplist vfs/extfs/uzip vfs/extfs/uzoo vfs/extfs/lslR vfs/extfs/ulha 
vfs/extfs/uha vfs/extfs/ucpio vfs/extfs/deb vfs/extfs/urar vfs/extfs/uar

doc/mc.1 doc/mcedit.1 doc/mcserv.8

intl/Makefile po/Makefile.in
],[sed -e "/POTFILES =/r po/POTFILES" po/Makefile.in > po/Makefile])

if test x$srcdir != x; then
    if test $srcdir != .; then
	mkdir nt
	mkdir os2
	cp $srcdir/pc/Makefile nt/Makefile
    fi
fi

if echo "$screen_manager" | grep -q "SLang" ; then
    screen_manager="${screen_manager}${slang_term}"
fi

echo "
Configuration:

  Source code location:       ${srcdir}
  Compiler:	              ${CC}
  Compiler flags:             ${CFLAGS}
  File system:                ${vfs_type}
			      ${vfs_flags}
  Text mode screen manager:   ${screen_manager}
  Install console saver:      ${install_saver}
  Text mode mouse library:    ${mouse_lib}
  Text mode X11 support:      ${textmode_x11_support}
  Debugger code:              ${mem_debug}
  With subshell support:      ${subshell}
  X11 versions:               ${xvers}
  Internal editor:            ${EDIT_msg}
  Install path:		      ${prefix}/bin, ${prefix}/lib/mc"
if test -n "$xv_bindir"; then
echo "  XView version install path: ${xv_bindir}"
fi
echo ""