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From: dsr@mir.mitre.org (Douglas S. Rand)
Newsgroups: comp.windows.x
Subject: Re: X11 questions: Graphics, C++, R3-R4
Message-ID: <1991Feb21.183958.6290@linus.mitre.org>
Date: 21 Feb 91 18:39:58 GMT
References: <1460002@hpgnd.grenoble.hp.com>
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Reply-To: dsr@mir.mitre.org (Douglas S. Rand)
Organization: The MITRE Corporation
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It seems this question is asked every week.  The include files with
X11R4 are compatible with C++.  Motif is usable as is,  mostly include
the header files inside extern "C" { .... }.  There is a minor
problem with Instrinsics.h and a definition of String which causes confusion
with the libg++ or other String class.  This is fixable but not quite 
right in the distribution:

should be:

// Right in the beginning of Instrinsics.h

#if defined(__cplusplus) || defined(c_plusplus)
#define CONST const
/* make const String do the right thing */
#define String char*
#else
typedef char *String;

#define CONST
#endif /* __cplusplus */

and:

// At end
#undef String
#undef CONST

-- 
Douglas S. Rand 
Internet:   <dsrand@mitre.org>
Snail:	    MITRE, Burlington Road, Bedford, MA 
Disclaimer: MITRE might agree with me - then again...
Amateur Radio: KC1KJ