From: fox AT cat DOT nyu DOT edu (David Fox)
Subject: Re: Microsoft Foundation Classes
23 Aug 1997 01:26:40 -0700
Approved: cygnus DOT gnu-win32 AT cygnus DOT com
Distribution: cygnus
Message-ID: <y5aafiejj2p.fsf.cygnus.gnu-win32@graphics.cat.nyu.edu>
References: <ww02-BHRal52395 AT netaddress DOT usa DOT net> <33F893CD DOT 13056BBE AT uci DOT edu>
Original-To: gnu-win32 AT cygnus DOT com
In-Reply-To: Eric Britten's message of Mon, 18 Aug 1997 11:26:21 -0700
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Original-Sender: owner-gnu-win32 AT cygnus DOT com

Eric Britten <ebritten AT uci DOT edu> writes:

> > Is it possible to use MFC 4.1 using gnu-win32?  If so, how?
> 
> You need the source because VC++ and Borland C++ use a different name
> mangling conventions.  If you can get the source to compile, you can
> then create static and dynamic link MFC libraries.  DLLs with GCC are
> hard to create, I have had little luck with them.

How about using GCC's "ASM labels" mechanism to make inline functions
that invoke the MFC procedures?  Is the calling convention compatible?

] Controlling Names Used in Assembler Code
] ========================================
] 
]    You can specify the name to be used in the assembler code for a C
] function or variable by writing the `asm' (or `__asm__') keyword after
] the declarator as follows:
] 
]      int foo asm ("myfoo") = 2;
] 
] This specifies that the name to be used for the variable `foo' in the
] assembler code should be `myfoo' rather than the usual `_foo'.
] 
]    On systems where an underscore is normally prepended to the name of
] a C function or variable, this feature allows you to define names for
] the linker that do not start with an underscore.
] 
]    You cannot use `asm' in this way in a function *definition*; but you
] can get the same effect by writing a declaration for the function
] before its definition and putting `asm' there, like this:
] 
]      extern func () asm ("FUNC");
]      
]      func (x, y)
]           int x, y;
]      ...
] 
]    It is up to you to make sure that the assembler names you choose do
] not conflict with any other assembler symbols.  Also, you must not use a
] register name; that would produce completely invalid assembler code.
] GNU CC does not as yet have the ability to store static variables in
] registers.  Perhaps that will be added.

-- 
David Fox            http://www.cat.nyu.edu/fox            xoF divaD
NYU Media Research Lab     fox AT cat DOT nyu DOT edu    baL hcraeseR aideM UYN
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