github.com/aergoio/aergo@v1.3.1/libtool/src/gmp-6.1.2/demos/calc/README (about)

     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  
    61  ----------------
    62  Local variables:
    63  mode: text
    64  fill-column: 76
    65  End: