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Subject:	PATCH to get bc 1.06-1 to build with readline support under Cygwin
Date:	Fri, 13 Feb 2004 16:36:47 -0500
From:	Francis Litterio <franl AT world DOT std DOT com>
X-Random-Quote:	Reality is merely an illusion, albeit a very persistent one. -- Albert Einstein
Message-ID:	<ud68iu036.fsf@world.std.com>
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I installed the bc source package (bc-1.06-1-src.tar.bz2) and configured
it to build with readline support as follows:

   cd /usr/src/bc-1.06-1
   ./configure --with-readline --prefix=/usr/local

The build fails with a syntax error related to the readline support:

   $ make
   ...
   gcc -DHAVE_CONFIG_H -I. -I. -I.. -I. -I./../h    -g -O2 -Wall -funsigned-char -c scan.c
   scan.l:146: error: conflicting types for `readline'
   /usr/include/readline/readline.h:277: error: previous declaration of `readline'

I made the following small change to the source code in scan.l and bc
builds just fine:

   --- scan.l.orig	2004-02-13 16:22:26.847595200 -0500
   +++ scan.l	2004-02-13 16:21:55.702811200 -0500
   @@ -143,7 +143,7 @@

    /* Definitions for readline access. */
    extern FILE *rl_instream;
   -_PROTOTYPE(char *readline, (char *));
   +/* _PROTOTYPE(char *readline, (char *)); */

    /* rl_input puts upto MAX characters into BUF with the number put in
       BUF placed in *RESULT.  If the yy input file is the same as

I hope the Cygwin bc maintainer can integrate this change.  bc is much
nicer to use when it has readline support.
--
Francis Litterio
franl AT world DOT std DOT com
http://world.std.com/~franl/
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