[cvsnt-dev] Problem with libxml

Arthur Barrett arthur.barrett at march-hare.com
Tue Jun 24 02:16:44 BST 2008

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> I have a problem with the libxml2 library. I have installed it, but it 
> does not get detected by the configure script.

Libxml2 is what has (recently) been holding up the CVSNT 2.5.04 release:

Tony recently made some changes to resolve this and get us back on track for 
a release (basically to include libxml2 source in CVSNT) and I haven't 
really had a chance to test or build since - planning on making time for it 
later this week with a view to doing a stable release on June 30th.  It 
looks like you've found some bugs though (albeit build bugs).

> $ xml2-config --version
> 2.6.32

As the above (linked) notes discuss this in more detail - I discovered that 
CVSNT 2.5.04 didn't work unless libxml2 version was 2.6.2x (or higher - I 
didn't even know they'd gotten to 2.6.3x).  Previously the configure script 
didn't check the version at all - so I assume that's new - perhaps if a new 
enough libxml2 is installed Tony anticipated that the build should use it 
rather than the internal one (I think that is how the zlib integration 

> The configure script says:
> checking for xml2-config... /usr/bin/xml2-config
> checking for libxml2... yes
> checking libxml2 version > 2.6.26... yes

That looks OK.

> config.log says:
> configure:26013: found /usr/bin/xml2-config
> configure:26025: result: /usr/bin/xml2-config
> configure:26033: checking for libxml2
> configure:26055: result: yes
> configure:26060: checking libxml2 version > 2.6.26
> configure:26094: gcc -o conftest -g -O2   -I/usr/include/libxml2 
> conftest.c -lresolv -lresolv  -lxml2 >&5
> configure:26097: $? = 0
> configure:26103: ./conftest
> configure:26106: $? = 0
> configure:26121: result: yes
> But in config.h I find:
> /* defined if libxml is available */
> /* #undef HAVE_LIBXML */

I'm not sure if libxml and libxml2 are the same...  And the only thing I am 
certain of is that the libxml2 requirements in cvsapi are not #ifdef'd - so 
it wouldn't matter anyway.  In fact I just did a search of all the source 
and cannot find HAVE_LIBXML used anywhere.

> Also ldd shows no dependency on libxml2

What are you ldd'ing?  The dependency is from cvsapi.so to libxml2.so.

> As a second problem, the configuration within the libxml directory seems 
> to be broken, because I cannot
> make distclean
> Making distclean in libxml
> make[1]: Entering directory `/home/andy/Programming/Projects/cvsnt/libxml'
> make[1]: *** Keine Regel, um »distclean« zu erstellen.  Schluss.
> make[1]: Leaving directory `/home/andy/Programming/Projects/cvsnt/libxml'
> make: *** [distclean-recursive] Fehler 1
> Any thoughts?

The cvsnt modules cvsapi and protocols also use the distclean-recursive 
macro, and I cannot see anything 'wrong' with the makefile's on a quick 
inspection.  Can you trace out what make is actually trying to do here?  If 
you do 'make distclean' in the libxml directory does it work OK, ie: is it 
just recursing into libxml that is broken or is it that libxml makefile.in 
itself is broken?



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