One more check on valid display which is known to be in the startup

[xcircuit.git] / README

XCircuit v3.10
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An X11 drawing program [especially for circuit schematics]
(c) 2017 Tim Edwards  (see copyright notice in ./COPYRIGHT)
August 1993 -- April 2017
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Compilation/Installation notes:
(Online version at http://opencircuitdesign.com/xcircuit/install.html)

1) All compile-time features are set during the ./configure process.
   Run "./configure --help" for a list of configure options.  For most
   users, the relevant options are the following:

   --with-cairo         Enable cairo graphics

   --with-tcl           Configure xcircuit as an extension to Tcl/Tk.  Tcl
                        becomes the default interpreter.  Option is mutually
                        exclusive with "--with-python".  A feature of this
                        version is that the interpreter is available from
                        the calling terminal concurrently with the GUI.
                        Another feature of this version is that the graphics
                        are handled by Tk widgets instead of the troublesome
                        "Xw" widgets in the distribution.  As of version
                        3.1.7 where most of the bugs have been resolved,
                        use of this option is highly encouraged.

   --with-python        Configure xcircuit with the embedded Python
                        interpreter.  Option "--with-python" is disabled
                        by default, and has no effect if "--with-tcl" has
                        been selected.  The python interface is less
                        well-developed than the Tcl interface.  If you do
                        not intend to make use of the interpreter
                        command-line interface, there is probably no reason
                        to select this.

   --prefix=PREFIX      Location to install xcircuit.  Defaults to
                        /usr/local/.  The executable goes to /usr/local/bin/,
                        man pages to /usr/local/man/man1/, and everything
                        else to /usr/local/lib/xcircuit-VERSION/.  Defaults
                        can be separated by explicitly declaring
                        --exec-prefix=DIR, --mandir=DIR, and --libdir=DIR.

   The following option is experimental at present and will be changed to
   be enabled by default when the package is deemed stable:

   --enable-asg         Configure XCircuit with the automatic schematic
                        generation (ASG) package.  This package allows
                        XCircuit to read SPICE decks and produce schematics
                        from them.  Future functions include reading EDIF
                        netlists (from Verilog and/or VHDL), and automatially
                        routing layouts.

   The following options are probably not worth messing with:

   --disable-lgf        Save space by not compiling the compatibility with
                        "analog" and "diglog" .lgf-format files.

   --disable-schema     Don't compile the schematic capture system.  This
                        is a major feature of xcircuit, so disabling it is
                        not recommended.  However, you may do so if you
                        anticipate having no need for circuit netlists.

   There are some other options which can be supplied to the "configure"
   command-line which should only be needed in rare circumstances.  Most
   users can ignore these.

   --with-tcl=DIR       Tcl can be enabled with "--with-tcl" or
                        "--with-tcl=yes", and the Tcl library and include
                        directories will be automatically searched.  For
                        Tcl/Tk installations which cannot be found by the
                        automatic search, DIR should be the directory
                        containing "tclConfig.sh".

   --with-tk=DIR        Enabling Tcl for XCircuit implies "--with-tk".
                        However, for Tk installations which cannot be
                        found by automatic search and which cannot be
                        found by specifying "--with-tcl=DIR", DIR should
                        point to the directory containing "tkConfig.sh".

   --with-python=DIR    If the configure step cannot find a Python
                        interpreter, it can be explicitly referenced.
                        Requires the Python library (libpythonVERSION.a
                        or libpythonVERSION.so) and the python include
                        file Python.h.  The Python option uses the Python
                        language as an interpreter for xcircuit.

   --disable-double-buffer
                        This option is almost wholly deprecated due to the
                        speed of modern processors.  However, if you have
                        problems with slow rendering, you might find it
                        useful.

   --with-xpm=DIR       If the configure step cannot find the XPM package,
                        it can be explicitly referenced.  The XPM package
                        enables the toolbar and an icon when xcircuit is
                        iconified.

   --with-gs=DIR        If the configure step cannot find ghostscript,
                        it can be explicitly referenced.  The Ghostscript
                        option allows any PostScript file to be rendered
                        on the xcircuit background and saved with the
                        xcircuit file.

   NOTE:  When xcircuit went from "imake" to GNU make, the default install
   directory changed from /usr/local/lib to /usr/local/share/.  Since all
   the other CAD tools xcircuit works with install by default to
   /usr/local/lib, xcircuit version 3.1 has reverted to /usr/local/lib for
   reasons of compatibility.  See item (4) below, "uninstall".

2) Compile with the usual GNU-compile steps:

        ./configure
        make
        make install

   The final step must be done as root if you are installing to default
   locations (/usr/local/lib and /usr/local/bin).  XCircuit can be run
   in test mode before installation (see item (3), below).
   For the Tcl/Tk version the make steps are the same, assuming that
   Tcl/Tk libraries and include files can be found on the system.  If
   you specifically *don't* want the Tcl/Tk version, then do:

        ./configure --without-tcl
        make
        make install

   If you want to test before installing, do the following (csh/tcsh
   version; see item (3) for changes to line 4 for bash/ksh/sh):

        ./configure
        make
        setenv XCIRCUIT_LIB_DIR ./lib
        setenv XCIRCUIT_SRC_DIR ./lib/tcl
        lib/tcl/xcircuit.sh

   after which, if all goes well, you can do "make install".

3) NOTE:  To test xcircuit before installation, set environment variable

        setenv XCIRCUIT_LIB_DIR ./lib           (csh, tcsh)
        setenv XCIRCUIT_SRC_DIR ./lib/tcl

        export XCIRCUIT_LIB_DIR=./lib           (bash)
        export XCIRCUIT_SRC_DIR=./lib/tcl

   before running the xcircuit executable.

4) Uninstall:
   If you have compiled previous versions of xcircuit, the only thing you
   need to do to uninstall these versions is to remove the directory tree
   at /usr/local/share/xcircuit-(version) or /usr/local/lib/xcircuit-(version)
   for any version numbers which are not current.

5) HP/IRIX users:  If the "make" process dies with an error creating the man
   page, something like

      /usr/ccs/bin/m4:xcircuit.1.m4:911 more than 4096 chars of argument text

   be sure to use GNU m4.  This can be done during the configure process
   (using appropriate substitutions) with the following command:

      M4=<path to GNU m4> ./configure [options]

6) 64-bit system users: Proper compile may require specifically using
   configure option "--x-libraries=" to point to 64-bit libraries.
   This has been fixed for the AMD Opteron under Fedora Core;  other
   64-bit systems are untested.

7) aclocal problems: In case during the make process the system complains
   about a missing or out of date aclocal, rebuild the configure file with:

      autoreconf -fi

   And restart the ./configure command

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Shared Python Library:

   NOTE:  The XCircuit build will be *much* smaller if you have a shared
   python library.  However, the build instructions as of Python-2.1c2
   don't include instructions for building a shared library under linux.
   Here's how you do it:
        1) In the Makefile: set
                LDLIBRARY=libpython2.1.so
        2) Also in the Makefile:
                Add a case for libpython$(VERSION).so which looks
                exactly like the case statement for unixware:

                linux) \
                    $(LDSHARED) -o $@ $(LIBRARY_OBJS) \
                    ;; \ 

        3) Make until error (can't find libpython2.1.so)
        4) Copy or move libpython2.1.so to /usr/local/lib or /usr/lib
        5) Run (as root!) ldconfig -v -n /usr/local/lib  (or whereever
                you just put the shared library) and confirm that it
                found libpython2.1.so.
        6) Finish "make" (should run to normal completion).

   On my system, this is the difference between a 4MB xcircuit executable
   and a 1.5MB executable.  That's a big difference!  Of course, Python
   purists would say I should be embedding xcircuit in python, not the
   other way around, then what need do I have for a shared library,
   anyway?

   Python source (and other information relating to Python) can be found
   at www.python.org.  The Python interpreter is recommended, as XCircuit
   eventually will rely on Python to handle writing netlists, for
   flexibility in formatting.

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Extras:

   The file examples/.xcircuitrc shows how to make a home-directory file
to alter the behavior of xcircuit on startup.  It shows how to change the
color scheme, add new fonts, override the default libraries, and change
the editing behavior for polygons.  Note that if xcircuit is built with
embedded Python, the syntax for .xcircuitrc will be Python syntax, and
may use any Python commands in addition to the commands which hook into
xcircuit functions.  The file examples/test.py is a sample Python script
which features use of Python to create animated graphics within the
xcircuit window, shows how to access on-screen elements and change
their properties, and contains convenience function definitions for
manipulating xcircuit elements.

   Other files in the examples directory show how xcircuit can be
used to draw various things, from a simple circuit schematic
(vcoblock.ps) to an entire publishable-quality page of music 
(prelude.ps), plus an example of a fancy page border for slide
presentations.

   The files psfiles/signal.lps and psfiles/musiclib.lps are examples
of alternate or additional object libraries.  The library file lgf.lps
is used primarily by the lgf-to-ps conversion routines, but has some
different circuit objects in it.

   The file psfiles/fonttest.ps is a short PostScript program you can
use to get your printer to give you the names of all the built-in fonts
that it knows about, which is useful because if you add a font name to
xcircuit, the spelling has to be exactly correct or else the printer
won't recognize it.

   The file examples/gettext.py is a sample Python script which adds
a Python command called "gettext(filename)".  gettext(filename) reads
in file "filename", which should be an ASCII text file, and turns it
into a label in XCircuit positioned at the cursor position.

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X Resources:

   The Tcl/Tk version of XCircuit does not use the X resources but
picks up resources from the file "resource.tcl" in the run-time
library path (e.g., /usr/local/lib/xcircuit-3.8/resource.tcl).  The
resource names are the same as those described below but are specified
using the Tk "option add" command.

   The color scheme of xcircuit has a default setup, but accepts 
alternate color schemes using the following keywords which can be put
in the X Defaults (.Xdefaults, .Xresources) file:

   Resource name            Description                         Default
   -------------------      ----------------------------        -------
   xcircuit*foreground      color of buttons and popups;        White
   xcircuit*background      background of buttons & popups;     DarkSlateGray
   xcircuit.foreground      drawing area foreground;            White
   xcircuit.background      drawing area background;            Black
   xcircuit*gridcolor       color of the grid lines;            Gray40
   xcircuit*snapcolor       color of the snap-to points;        Red
   xcircuit*selectcolor     color of a selected object;         Gold
   xcircuit*querycolor      to differentiate multiple objects;  Turquoise
   xcircuit*axescolor       color of the x, y axes;             NavajoWhite4
   xcircuit*offbuttoncolor  text color of an inoperable button; Gray70
   xcircuit*auxiliarycolor  text cursor and other things        Green
   xcircuit*barcolor        color of panning bars               Tan

A secondary color scheme (for example, black-on-white) can be specified by
adding "2" to each of the above resource names.  For example:

   xcircuit*foreground2     color of every object drawn;        Black
   xcircuit*background2     screen background color;            White

Other resources accepted by xcircuit are:

   xcircuit*width           width of the drawing area (pixels); 600
   xcircuit*height          height of the drawing area;         500

Normally, you will want to put the defaults in /usr/lib/X11/app-defaults.
If you do not have root access, you will want to have them in your own
home .Xdefaults file.  If the file is not found by xcircuit, the program
will use its default color schemes, the main one being black-on-white,
and the alternate being white-on-dark-gray.

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Altering, Copying, and/or Redistributing XCircuit:

   XCircuit is distributed under the GNU GPL (General Public Licence).  See
   the file COPYRIGHT in the top-level directory for details.

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XCircuit Home Page: 
     "http://opencircuitdesign.com/xcircuit/"

Online tutorial:
     "http://opencircuitdesign.com/xcircuit/tutorial/tutorial.html"

Schematic capture tutorial:
     "http://opencircuitdesign.com/xcircuit/tutorial/tutorial2.html"

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Contact address (check the website above for a current address):
                R. Timothy Edwards
                19412 Cissel Manor Road
                Poolesville, MD 20837

                Phone: (301) 528-5030   (home)

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