On Sun, Jun 14, 2009 at 08:01:21PM +0200, Bastian Blank wrote: > On Sun, Jun 14, 2009 at 03:48:28PM +0200, Bill Allombert wrote: > > This version is ABI-incompatible with libjpeg6b. > > However it should be fully API compatible. > > To avoid symbol conflicts with libjpeg v6, the symbols are versionned. > > In the current version, the symbols are not versioned. So this does not > hold as Base symbols match always.
True, and not true. If you have something like that in the new headers:
#define LIBJPEG_REDIRECT(sym, proto) sym JPP(proto) __asm__(#sym"_abi7x")
And then do:
EXTERN(void) LIBJPEG_REDIRECT(jpeg_destroy, (j_common_ptr cinfo));
Then you'll divert all uses of jpeg_destroy to jpeg_destroy_abi7x which
can be properly versioned, and the always-matching semantics of 'Base'
will not be a problem.
I wish they had done that + kept the old 'Base' symbols with the
appropriate things to do and forward to the new abi functions to keep
binary compatibility :|
--
·O· Pierre Habouzit
··O madco...@debian.org
OOO http://www.madism.org
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