Hi Aron, On Wed, 29 May 2024 14:16:47 +0800 Aron Xu <a...@debian.org> wrote:
It seems wrong to me for a library in a distribution like Debian to warn on version mismatch. I know we're having the discussion about SONAME bumps in libxml2 for a reason, but if a library breaks its ABI, it must bump its SONAME. If it doesn't break its ABI, the warning is useless (in a distribution like Debian). To me the presence of the warning in the upstream code is in line with the impression that libxml2 upstream doesn't understand how distributions handle libraries.> They all seem to fail with: > > Warning: program compiled against libxml 212 using older 209 > > and this comes from libxml: > > https://sources.debian.org/src/libxml2/2.12.7+dfsg-2/parserInternals.c/?hl=79#L79 > > if ((myversion / 100) < (version / 100)) { > xmlGenericError(xmlGenericErrorContext, > "Warning: program compiled against libxml %d using older %d\n", > (version / 100), (myversion / 100)); > } > > > Not sure if this is should be fixed in libxml2 or if we should add an > artifical dependency on a newer libxml2 (to avoid testing against the > version in testing). The former sounds more logic to me. >Although it looks trivial to remove the warning from libxml2, I'm reluctant since this piece of code existed for a very long time, a random check shows that version 2.2.3 (in 2000) has the logic: https://gitlab.gnome.org/GNOME/libxml2/-/blob/04698d9e1c56467007fcbb9472e5db67cf5938f5/parserInternals.c#L66
Paul
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