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Added benchmark results
Tried to work around if clause in Makefile.in
Small bugfix in sokoban

    1: You need gcc version 2.0 or later to compile gforth.
    2: 
    3: First, type
    4: 
    5: ./configure
    6: 
    7: or better
    8: 
    9: CC=gcc ./configure
   10: 
   11: or however your gcc is called; because configure needs cc to find out some
   12: parameters, and there may be differences in what is obtained from gcc and
   13: from ghe default cc.
   14: 
   15: configure has the following useful parameters:
   16:   --prefix=PREFIX         install architecture-independent files in PREFIX
   17:                           [default: /usr/local]
   18:   --exec-prefix=PREFIX    install architecture-dependent files in PREFIX
   19:                           [default: same as prefix]
   20:   --enable-force-reg      Use explicit register declarations if they appear in
   21:                           the machine.h file. This can cause a good speedup,
   22:                           but also incorrect code with some gcc versions on
   23:                           some processors (default disabled).
   24:   --enable-direct-threaded      Force direct threading. This may not work on
   25:                                 some machines and may cause slowdown on others.
   26:                                 (default processor-dependent)
   27:   --enable-indirect-threaded    Force indirect threading. This can cause a
   28:                                 slowdown on some machines.
   29:                                 (default processor-dependent)
   30:   --with-debug     specifies option -g to compile with debug info (default)
   31:    --without-debug  omits the -g switch and creates smaller images on
   32:                     machines where strip has problems with gcc style
   33:                     debugging informations.
   34:   --help: tells you about other parameters.
   35: 
   36: If you don't like the defaults for the installation directories, you
   37: should override them already during configure.  E.g., if you want to
   38: install in the /gnu hierarchy instead of in the default /usr/local
   39: hirarchy, say
   40: 
   41: ./configure --prefix=/gnu
   42: 
   43: After, configuration, type
   44: 
   45: make
   46: 
   47: If your make has trouble with the Makefile, "make gforth" might work.
   48: 
   49: If your installed gcc isn't called "gcc" (e.g., called "gcc-2.6.1"), type
   50: 
   51: make GCC=<whatever you call your gcc>
   52: 
   53: instead.
   54: 
   55: Now you can check whether your shiny new Forth system works. Say
   56: 
   57: make test
   58: 
   59: You can run some benchmarks with
   60: 
   61: make bench
   62: 
   63: and compare them with the results in Benchres and in the manual.
   64: 
   65: If everything is all right, you may want to install gforth. Type
   66: 
   67: make install
   68: 
   69: You have to make an entry in the info directory file manually.
   70: 
   71: For paper documentation, print gforth.ps (a Postscript file (300dpi
   72: fonts, i.e., it works, but does not produce best quality on better
   73: printers)), or say
   74: 
   75: make gforth.dvi
   76: 
   77: and print the resulting file gforth.dvi. You can also get the
   78: documentation in HTML format by typing
   79: 
   80: make html
   81: 
   82: 
   83: 		Preloading installation-specific code
   84: 
   85: If you want to have some installation-specific files loaded when
   86: Gforth starts (e.g., an assembler for your processor), put commands
   87: for loading them into /usr/local/share/gforth/site-forth/site-init.fs
   88: (if the commands work for all architectures) or
   89: /usr/local/lib/gforth/site-forth/site-init.fs (for
   90: architecture-specific commands);
   91: /usr/local/lib/gforth/site-forth/site-init.fs takes precedence if both
   92: files are present (unless you change the search path). The file names
   93: given above are the defaults; if you have changed the prefix, you have
   94: to replace "/usr/local" in these names with your prefix.
   95: 
   96: By default, the installation procedure creates an empty
   97: /usr/local/share/gforth/site-forth/site-init.fs if there is no such
   98: file.
   99: 
  100: If you change the site-init.fs file, you should run "make install"
  101: again for the changes to take effect (Actually, the part of "make
  102: install" starting with "rm gforth.fi" is sufficient).
  103: 
  104: 
  105: 		Multiple Versions and Deinstallation
  106: 
  107: Several versions of Gforth can be installed and used at the same
  108: time. Version `foo' can be invoked with `gforth-foo'. We recommend to
  109: keep the old version for some time after a new one has been installed.
  110: 
  111: You can deinstall this version of Gforth with 'make uninstall' and
  112: version foo with 'make uninstall VERSION=foo'. 'make uninstall' also
  113: tells you how to uninstall Gforth completely.
  114: 
  115: 
  116: 			A Possible Problem
  117: 
  118: You need to read this only if you see a message like
  119: 
  120: "gforth: Cannot load nonrelocatable image (compiled for address 0x1234) at address 0x5678
  121: The Gforth installer should look into the INSTALL file"
  122: 
  123: Gforth supports both relocatable and fixed-address images. If you load
  124: normal Forth code and save the image, you get a fixed-address
  125: image. Producing a relocatable image is more difficult.
  126: 
  127: Therefore, Gforth has only a relocatable image of the kernel
  128: (kernal.fi), which is powerful enough to load the rest of
  129: Gforth. However, loading the rest takes a noticable amount of time. To
  130: avoid this delay (which would occur on every startup), the
  131: installation procedure produces an image fixed at an address
  132: determined at the Gforth run that produced the image. This
  133: fixed-address image is loaded by default. On most OSs this works,
  134: because the first chunk of memory is always allocated at the same
  135: address. If the address changes, you get the message above.
  136: 
  137: An image address change can be caused by a change of the gforth
  138: executable, or by a change (upgrade) of the OS; in these cases you
  139: just have to rebuild and reinstall the fixed address image with
  140: 
  141: rm gforth.fi; make gforth.fi; make install
  142: 
  143: If you get such a message with a different address in place of the
  144: 0x5678 each time you try to start gforth, you cannot use fixed-address
  145: images on your OS. In this case, send us a message so that we start
  146: searching for a comfortable solution to this problem. In the
  147: meantime, start gforth with
  148: 
  149: gforth -i kernal.fi startup.fs
  150: