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    1 Copyright 2001 Free Software Foundation, Inc.
    2 
    3 This file is part of the GNU MP Library.
    4 
    5 This program is free software; you can redistribute it and/or modify it under
    6 the terms of the GNU General Public License as published by the Free Software
    7 Foundation; either version 3 of the License, or (at your option) any later
    8 version.
    9 
   10 This program is distributed in the hope that it will be useful, but WITHOUT ANY
   11 WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A
   12 PARTICULAR PURPOSE.  See the GNU General Public License for more details.
   13 
   14 You should have received a copy of the GNU General Public License along with
   15 this program.  If not, see https://www.gnu.org/licenses/.
   16 
   17 
   18 
   19 
   20                    DEMONSTRATION CALCULATOR PROGRAM
   21 
   22 
   23 This is a simple program, meant only to show one way to use GMP with yacc
   24 and lex to make a calculator.  Usage and comments on the implementation can
   25 be found in calc.y.
   26 
   27 Within a GMP build tree, the generated Makefile can be used to build the
   28 program,
   29 
   30 	make calc
   31 
   32 (or on a DOS system, "make calc.exe").
   33 
   34 Elsewhere, once GMP has been installed, the program can be compiled with for
   35 instance
   36 
   37 	gcc calc.c calclex.c -lgmp -o calc
   38 
   39 Or if GNU readline is used then
   40 
   41 	gcc calc.c calclex.c calcread.c -lgmp -lreadline -o calc
   42 
   43 (again, on a DOS system "-o calc.exe").
   44 
   45 Readline support can be enabled or disabled in calc-config.h.  That file is
   46 created by the GMP ./configure based on the --with-readline option.  The
   47 default is --with-readline=detect, which means to use readline if available.
   48 "yes" can be used to force it to be used, or "no" to not use it.
   49 
   50 The supplied calc.c was generated by GNU bison, but a standard yacc should
   51 work too.
   52 
   53 The supplied calclex.c was generated by GNU flex, but a standard lex should
   54 work too.  The readline support may or may not work with a standard lex (see
   55 comments with input() in calcread.c).  Note also that a standard lex will
   56 require its library "-ll" on the compile command line.  "./configure" sets
   57 this up in the GMP build tree Makefile.
   58 
   59 
   60 
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