dnl# $Id$

AC_INIT(src/feature.h)
AM_INIT_AUTOMAKE(Eterm, 0.9)

dnl# Set some basic variables
DATE="`date '+%d %B %Y'`"
AC_SUBST(DATE)
AUTHORS="Michael Jennings (mej@eterm.org) and Tuomo Venäläinen (vendu@cc.hut.fi) "
AC_SUBST(AUTHORS)
AC_DEFINE_UNQUOTED(AUTHORS, "$AUTHORS")

dnl# Supply default CFLAGS, if not specified by `CFLAGS=flags ./configure'
if test ! -z "${CFLAGS}" -o ! -z "${CCOPTS}"; then
  CFLAGS_GIVEN=1
else
  CFLAGS_GIVEN=0
fi

if test -z "${CFLAGS}"; then
    if test -z "${CCOPTS}"; then
	CCOPTS="-O"
    fi
    CFLAGS="$CCOPTS"
fi

AC_ARG_WITH(cc, [  --with-cc=compiler      force Eterm to build with a particular compiler (like pgcc, egcs, etc.)],
            CC=$withval, 
  if test -z "$CC"; then
    CC=check
  fi
)

if test "$CC" = "check"; then
  dnl# Check for Pentium compilers
  AC_CHECK_PROG(EGCS, egcs, egcs)
  AC_CHECK_PROG(PGCC, pgcc, pgcc)

  if test ! -z "$EGCS"; then
    CC=$EGCS
  elif test ! -z "$PGCC"; then
    CC=$PGCC
  else
    unset CC
  fi
fi

AC_PROG_CC
AC_PROG_CPP

dnl# These must be run after AC_PROG_CC but before any other macros that use
dnl# the C compiler
AC_AIX
AC_ISC_POSIX
AC_MINIX

dnl# At least make the attempt to support CygWin32
AC_CYGWIN
AC_ARG_PROGRAM

AM_PROG_LIBTOOL

dnl# Where are we?
AC_MSG_CHECKING(for distribution root)
DIST_ROOT=`pwd`
AC_SUBST(DIST_ROOT)
AC_MSG_RESULT($DIST_ROOT)

AC_GCC_TRADITIONAL

dnl # If using gcc, use -O2.  If -g works with it, use that too
if test "${CFLAGS_GIVEN}" -ne 1; then
    if test "$GCC" = "yes"; then
	if test "$ac_cv_prog_cc_g" = "yes"; then
	    CCOPTS='-g -O2'
	else
	    CCOPTS='-O2'
	fi
	CFLAGS="$CCOPTS"
    fi
fi

AC_PROG_INSTALL

dnl# Check for host system type
AC_CANONICAL_HOST

dnl# Check the sanity of what we've done so far
AM_SANITY_CHECK

dnl# Most people don't want the developer-only clutter
AM_MAINTAINER_MODE

dnl# If it's there, what the hell?
AM_WITH_DMALLOC

dnl# Look for needed programs
AC_CHECK_PROG(SED, sed, sed, false)
AC_CHECK_PROG(RM, rm, rm, true)
AC_CHECK_PROG(CP, cp, cp, false)
AC_CHECK_PROG(CHMOD, chmod, chmod, true)
AC_CHECK_PROG(TAR, tar, tar, tar)
AC_CHECK_PROG(MKDIR, mkdir, mkdir, false)
AC_CHECK_PROG(CTAGS, ctags, ctags, true)
AC_CHECK_PROG(AR, ar, ar, false)
AC_CHECK_PROG(MV, mv, mv, true)
AC_LN_S

AC_CHECK_SIZEOF(int, 4)
AC_CHECK_SIZEOF(long, 4)
AC_CHECK_SIZEOF(long long, 8)
dnl AC_C_BIGENDIAN

AC_C_CONST
AC_C_INLINE
AC_PATH_XTRA

if test "$ac_cv_lib_socket_connect" = "yes" ; then
  SUBLIBS="-lsocket"
fi
if test "$ac_cv_lib_nsl_gethostbyname" = "yes" ; then
  SUBLIBS="$SUBLIBS -lnsl"
fi

dnl# Checks for header files.
AC_HEADER_SYS_WAIT
AC_CHECK_HEADERS(fcntl.h termios.h \
sys/ioctl.h sys/select.h sys/time.h \
sys/sockio.h sys/byteorder.h \
utmpx.h unistd.h bsd/signal.h regex.h \
regexp.h stdarg.h)
AC_HEADER_TIME

dnl# Missing typedefs and replacements
AC_TYPE_MODE_T
AC_CHECK_TYPE(off_t, long)
AC_TYPE_PID_T
AC_TYPE_UID_T

dnl# Checks for library functions.
AC_TYPE_SIGNAL
AC_CHECK_FUNCS(atexit _exit unsetenv setutent seteuid memmove putenv strsep setresuid setresgid memmem usleep snprintf)
dps_snprintf_oflow()

dnl# Check for the need for -lutil on BSD systems
AC_CHECK_FUNC(login, 
  AC_DEFINE(HAVE_LOGIN)
, AC_CHECK_LIB(util, login, LIBS="$LIBS -lutil" ;
  AC_DEFINE(HAVE_LOGIN)
))
AC_CHECK_FUNC(logout, 
  AC_DEFINE(HAVE_LOGOUT)
, AC_CHECK_LIB(util, logout, LIBS="$LIBS -lutil" ;
  AC_DEFINE(HAVE_LOGOUT)
))
AC_CHECK_FUNC(getpwuid, , AC_CHECK_LIB(sun, getpwuid, LIBS="$LIBS -lsun"))

dnl# Did they want debugging?
AC_MSG_CHECKING(for debugging level)
AC_ARG_WITH(debugging, [  --with-debugging[=num]  enable debugging output, num is an optional level],
              if test "$withval" = "yes"; then
                  withval=4
              else
                  :
              fi
              if test "$withval" != "no"; then 
                  echo "$withval"
                  AC_DEFINE_UNQUOTED(DEBUG, $withval)
              else
                  echo "no debugging"
              fi, echo "4"
                  AC_DEFINE_UNQUOTED(DEBUG, 4)
)

dnl#
dnl# FEATURES
dnl#
AC_MSG_CHECKING(for pixmap support)
AC_ARG_WITH(imlib,
[  --with-imlib[=DIR]      compile with Imlib support (Imlib residing in DIR/lib) (default)],
            if test "$withval" != "no"; then 
              AC_MSG_RESULT(yes)
              CFLAGS="$CFLAGS -I${withval}/include -L${withval}/lib"
              GRLIBS="-lImlib"
              AC_DEFINE(PIXMAP_SUPPORT)
              AC_DEFINE(PIXMAP_SCROLLBAR)
              AC_DEFINE(PIXMAP_MENUBAR)
              AC_DEFINE(BACKING_STORE)
            else
              AC_MSG_RESULT(no)
              GRLIBS=""
            fi, AC_MSG_RESULT(yes)
                GRLIBS="-lImlib"
                AC_DEFINE(PIXMAP_SUPPORT)
                AC_DEFINE(PIXMAP_SCROLLBAR)
                AC_DEFINE(PIXMAP_MENUBAR)
                AC_DEFINE(BACKING_STORE)
)
AC_MSG_CHECKING(for transparency support)
AC_ARG_ENABLE(trans,
[  --enable-trans[=imlib]  compile with transparency support ("=imlib" will use Imlib instead of Xlib for transparency)],
            if test "$enableval" = "imlib"; then 
              AC_MSG_RESULT(yes, using Imlib)
              AC_DEFINE(PIXMAP_OFFSET)
              AC_DEFINE(IMLIB_TRANS)
            elif test "$enableval" != "no"; then 
              AC_MSG_RESULT(yes)
              AC_DEFINE(PIXMAP_OFFSET)
            else
              AC_MSG_RESULT(no)
            fi, AC_MSG_RESULT(yes)
                AC_DEFINE(PIXMAP_OFFSET)
)
AC_MSG_CHECKING(for utmp support)
AC_ARG_ENABLE(utmp,
[  --enable-utmp           compile with utmp support],
            if test "$enableval" != "no"; then 
              AC_MSG_RESULT(yes)
              AC_DEFINE(UTMP_SUPPORT)
            else
              AC_MSG_RESULT(no)
            fi, AC_MSG_RESULT(yes)
                AC_DEFINE(UTMP_SUPPORT)
)
AC_MSG_CHECKING(for backspace key configuration)
AC_ARG_WITH(backspace,
[  --with-backspace=KEY    force backspace to send KEY (KEY is either "bs" for ^H or "del" for ^?)],
            if test "$withval" = "bs"; then 
              AC_MSG_RESULT(forcing Backspace to send Ctrl-H)
              AC_DEFINE(FORCE_BACKSPACE)
            elif test "$withval" = "del"; then 
              AC_MSG_RESULT(forcing Backspace to send Ctrl-?)
              AC_DEFINE(FORCE_DELETE)
            else
              AC_MSG_RESULT(default)
            fi, AC_MSG_RESULT(default)
)
AC_MSG_CHECKING(for delete key configuration)
AC_ARG_WITH(delete,
[  --with-delete=SETTING   force delete to SETTING ("server" to use the X server value always or
                          a quoted string to use a specific string)],
            if test "$withval" = "server"; then 
              AC_MSG_RESULT(X server value)
              AC_DEFINE(NO_DELETE_KEY)
            else
              AC_MSG_RESULT(forcing Delete to send "$withval")
              AC_DEFINE_UNQUOTED(KS_DELETE, "$withval")
            fi, AC_MSG_RESULT(default)
                AC_DEFINE_UNQUOTED(KS_DELETE, "\177")
)
AC_MSG_CHECKING(for multi-charset support)
AC_ARG_ENABLE(multi-charset,
[  --enable-multi-charset  compile with multi-charset support],
            if test "$enableval" = "yes"; then 
              AC_MSG_RESULT(yes)
              AC_DEFINE(MULTI_CHARSET)
            else
              AC_MSG_RESULT(no)
            fi, AC_MSG_RESULT(no)
)
AC_MSG_CHECKING(for XIM support)
AC_ARG_ENABLE(xim,
[  --enable-xim            compile with XIM support],
            if test "$enableval" = "yes"; then 
              AC_MSG_RESULT(yes)
	      AC_DEFINE(USE_XIM)
	      XIM="TRUE"
            else
              AC_MSG_RESULT(no)
	      XIM="FALSE"
            fi, AC_MSG_RESULT(no)
)
AC_MSG_CHECKING(for Greek keyboard support)
AC_ARG_ENABLE(greek,
[  --enable-greek          compile with support for Greek keyboards],
            if test "$enableval" = "yes"; then 
              AC_MSG_RESULT(yes)
              AC_DEFINE(GREEK_SUPPORT)
            else
              AC_MSG_RESULT(no)
            fi, AC_MSG_RESULT(no)
)
AC_MSG_CHECKING(which threads library to use)
AC_ARG_WITH(threads,
[  --with-threads[=STYLE]  compile with threads support, STYLE is either "posix" or blank
                          (disabled by default)],
            case $withval in
              [yes | posix )]
                AC_MSG_RESULT(POSIX)
                THREADS_LIB=posix
                ;;
              [* )]
                AC_MSG_RESULT(none)
                ;;
            esac
 , AC_MSG_RESULT(none))
if test "$THREADS_LIB" = "posix"; then
  AC_CHECK_LIB(pthread, pthread_create, CFLAGS="$CFLAGS -D_REENTRANT" ; THREADLIBS="-lpthread"
                                       AC_DEFINE(USE_POSIX_THREADS)
                                       AC_DEFINE(MUTEX_SYNCH)
               , , -D_REENTRANT -L/usr/lib -L/lib -L/usr/local/lib)
fi

dnl#
dnl# X LIBRARIES
dnl#
AC_CHECK_LIB(X11, XOpenDisplay, X_LIBS="$X_LIBS -lX11", [
echo "ERROR:  You need libX11 to build Eterm.  Verify that you have libX11.a or";
echo "        libX11.so installed and that it is located in the X libraries";
echo "        directory shown above.  If it is in a different directory, try using";
echo "        the --x-libraries parameter to configure.";
             AC_MSG_ERROR([Fatal:  libX11 not found.])], $X_LIBS $SUBLIBS)
AC_CHECK_LIB(Xext, XextAddDisplay, X_LIBS="-lXext $X_LIBS", [
echo "ERROR:  You need libXext to build Eterm.  Verify that you have libXext.a or";
echo "        libXext.so installed and that it is located in the X libraries";
echo "        directory shown above.  If it is in a different directory, try using";
echo "        the --x-libraries parameter to configure.";
             AC_MSG_ERROR([Fatal:  libXext not found.])], $X_LIBS $SUBLIBS)

AC_CHECK_LIB(Xext, XShapeQueryExtension, AC_DEFINE(HAVE_X_SHAPE_EXT), , $X_LIBS $SUBLIBS)

# check if we need X_LOCALE definition
AC_CHECK_LIB(X11, _Xsetlocale, , AC_DEFINE(NO_XLOCALE), , $X_LIBS $SUBLIBS)

# check X11R6 for XIM
if test "$XIM" = "TRUE"; then
  AC_CHECK_LIB(X11, XRegisterIMInstantiateCallback, AC_DEFINE(USE_X11R6_XIM), , $X_LIBS $SUBLIBS)
fi

if test -z "$PIXMAPSED"; then

  AC_CHECK_PROG(IMLIB_CONFIG, imlib-config, imlib-config, no)

  if test "$IMLIB_CONFIG" != "no"; then

    if test "$prefix" = "NONE"; then
      AC_MSG_CHECKING(imlib-config for prefix)
      prefix="`$IMLIB_CONFIG --prefix`"
      AC_MSG_RESULT($prefix)
    fi

    AC_MSG_CHECKING(imlib-config for the value of CFLAGS)
    CFLAGS="$CFLAGS `$IMLIB_CONFIG --cflags`"
    AC_MSG_RESULT($CFLAGS)

    AC_MSG_CHECKING(imlib-config for the value of GRLIBS)
    GRLIBS="$GRLIBS `$IMLIB_CONFIG --libs`"
    AC_MSG_RESULT($GRLIBS)

    SAVE_LIBS="$LIBS"
    LIBS="$GRLIBS"

    AC_MSG_CHECKING(the sanity of new compile/link flags)
    AC_TRY_LINK(, , echo "yes", echo "no" ; IMLIB_CONFIG="no" ; 
                AC_WARN(Compile/link failed.  Reverting to manual method.)
    )

    LIBS="$SAVE_LIBS"

  fi

  if test "$IMLIB_CONFIG" = "no"; then

    AC_CHECK_LIB(png, png_get_valid, GRLIBS="$GRLIBS -lpng -lz -lm", ,
                 $SUBLIBS $X_LIBS -lz -lm)
    AC_CHECK_LIB(jpeg, jpeg_read_scanlines, GRLIBS="$GRLIBS -ljpeg", ,
                 $SUBLIBS $X_LIBS)
    AC_CHECK_LIB(tiff, TIFFOpen, GRLIBS="$GRLIBS -ltiff", ,
                 $SUBLIBS $X_LIBS -lm)
    AC_CHECK_LIB(gif, DGifOpenFileName, GRLIBS="$GRLIBS -lgif", ,
                 $SUBLIBS $X_LIBS)
    AC_CHECK_LIB(ungif, DGifOpenFileName, GRLIBS="$GRLIBS -lungif", ,
                 $SUBLIBS $X_LIBS)
    AC_CHECK_LIB(Imlib, Imlib_init, , [
                 echo "WARNING:  Imlib was not found or did not correctly link.";
                 echo "          Please check config.log to see what the error was.";
                 echo "          I will attempt to continue, but things may go wrong.";
                 AC_MSG_WARN([WARNING:  libImlib not found.  Attempting to continue anyway.])],
                 $GRLIBS $SUBLIBS $X_LIBS)

  fi

fi

AC_PREFIX(Eterm)
AC_PREFIX(gcc)

dnl Stack Tracing toys
AC_ARG_ENABLE(stack-trace, [  --disable-stack-trace   disable stack trace on abnormal termination],
  if test "$enableval" = "no"; then
    AC_DEFINE(NO_STACK_TRACE)
    NO_STACK_TRACE=1
  fi
)

if test "$NO_STACK_TRACE" != "1"; then
  AC_PATH_PROG(DBX, dbx, no)
  if test "$DBX" != "no"; then
    AC_DEFINE_UNQUOTED(DBX, "$DBX")
  fi
  AC_PATH_PROG(GDB, gdb, no)
  if test "$GDB" != "no"; then
    AC_DEFINE_UNQUOTED(GDB, "$GDB")
  fi
  AC_PATH_PROG(PSTACK, pstack, no, $PATH:/usr/proc/bin:/usr/sbin)
  if test "$PSTACK" != "no"; then
    AC_DEFINE_UNQUOTED(PSTACK, "$PSTACK")
  fi
  AC_CHECK_LIB(cl, U_STACK_TRACE, LIBS="$LIBS -lcl")
fi

AC_MSG_CHECKING(for Linux 2.1 or higher)
OS_NAME=`uname -s`
if test "$OS_NAME" = "Linux"; then
  OS_REV=`uname -r`
  OS_MAJOR=`echo $OS_REV | cut -d. -f1`
  OS_MINOR=`echo $OS_REV | cut -d. -f2`
  if test "$OS_MAJOR" -ge "2" -a "$OS_MINOR" -ge "1"; then
    AC_MSG_RESULT(yes)
    AC_DEFINE(NEED_LINUX_HACK)
  else
    AC_MSG_RESULT(no)
  fi
else
  AC_MSG_RESULT(no)
fi

dnl# Enable/disable humor
AC_ARG_WITH(sense-of-humor, [  --without-sense-of-humor   Specify this if you have no sense of humor],
            if test "$withval" = "no"; then
              HUMOR=none
            fi)

if test -z "$HUMOR"; then
AC_CHECK_LIB(Kenny, life_signs, , [
  echo "  Oh my god, they killed Kenny!  You bastards!"
])
fi

AC_DEFINE_UNQUOTED(CONFIG_SEARCH_PATH, "~/.Eterm/themes:~/.Eterm:${prefix}/share/Eterm/themes:${prefix}/share/Eterm")

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

CPPFLAGS="$CPPFLAGS"
AC_SUBST(CC)
AC_SUBST(CFLAGS)
AC_SUBST(CPPFLAGS)
AC_SUBST(LDFLAGS)
AC_SUBST(LIBS)
AC_SUBST(THREADLIBS)
AC_SUBST(GRLIBS)

basedir=.

AM_CONFIG_HEADER(config.h)

AC_OUTPUT(Makefile \
bg/Makefile \
doc/Makefile \
utils/Makefile \
libmej/Makefile \
pix/Makefile \
src/Makefile \
src/graphics/Makefile \
themes/Makefile \
Eterm.spec \
)

dnl If we're not building with Imlib support, don't build Esetroot
if test -z "$GRLIBS"; then
  sed -e 's/^bin_PROGRAMS.*$//g' doc/Makefile > doc/Makefile.new
  mv doc/Makefile.new doc/Makefile
fi

echo "
$PACKAGE $VERSION
Configuration:
--------------

  Source code location:       ${srcdir}
  Compiler:	              ${CC} ${CFLAGS}
  Host System Type:           ${host}
  Graphics libraries:         ${GRLIBS}
  X libraries/paths:          ${X_LIBS}
  Install path:		      ${prefix}

  See src/feature.h for further configuration information.

  Now type 'make' to build $PACKAGE $VERSION.
"