[Expat-bugs] [ expat-Bugs-1048448 ] Create different link symbols for different XML_Char sizes

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Bugs item #1048448, was opened at 2004-10-16 16:16
Message generated for change (Comment added) made by fdrake
You can respond by visiting: 
https://sourceforge.net/tracker/?func=detail&atid=110127&aid=1048448&group_id=10127

Category: None
Group: Feature Request
Status: Open
>Resolution: Postponed
Priority: 5
Submitted By: Steinar Bang (steinarb)
Assigned to: Nobody/Anonymous (nobody)
Summary: Create different link symbols for different XML_Char sizes

Initial Comment:
It would be nice if some C preprocessor magic could be used to make 
different XML_Char sizes, selected at compile time, result in different 
link symbols for the functions in the API.

This would make it possible for different shared libraries making up an 
application on linux, to link against expat shared libraries that have 
been compiled with different values for XML_char.

I ran into a problem when I had compiled my own shared library 
version of expat on linux, compiled with -DUNICODE, and a base 
library had been linked with the fontconfig library, to improve X11 font 
handling.  The fontconfig library had an XML config file, and used expat 
to parse the file.  It used the system installed version of expat, which 
had a char sized XML_Char.

This resulted in the following console output at my application's startup:
	Fontconfig error: line 1: unknown encoding
	Fontconfig error: Cannot load default config file
and the application started up with a strange-looking font named 
"Arioso", when what I expected was "Helvetica".

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>Comment By: Fred L. Drake, Jr. (fdrake)
Date: 2005-01-27 23:22

Message:
Logged In: YES 
user_id=3066

This should definately be done, but will break binary
compatibility with recent releases.

We'll plan to include this as a new feature in Expat 3
(Expat 2 will be the result of recent, not something
incompatible with the current releases).

Marking this "postponed"; this will be un-postponed when we
start Expat 3 development.

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You can respond by visiting: 
https://sourceforge.net/tracker/?func=detail&atid=110127&aid=1048448&group_id=10127