[Libreoffice] Vcl module compilation failed

Hello,

Here is what I get if I try to compile vcl :
maryline@maryline:~/compile-libreoffice/libo/vcl$ rm -rf unxlngi6/ && 
make -r
CxxObject/vcl/source/salmain/salmain.o is linked in by 
Library/libvcllo.so StaticLibrary/libvclmain.a
/home/maryline/compile-libreoffice/libo/solenv/gbuild/extensions/final_ObjectOwner.mk:43: 

[ WARN   ] !!!
[ WARN   ] !!! duplicate linked objects
[ WARN   ] !!!

Here is the autogen.lastrun :

--enable-symbols
--enable-ext-barcode
--enable-ext-diagram
--enable-ext-google-docs
--enable-ext-hunart
--enable-ext-lightproof
--enable-ext-nlpsolver
--enable-ext-ct2n
--enable-ext-numbertext
--enable-ext-oooblogger
--enable-ext-pdfimport
--enable-ext-presenter-console
--enable-ext-presenter-minimizer
--enable-ext-report-builder
--enable-ext-scripting-beanshell
--enable-ext-scripting-javascript
--enable-ext-typo
--enable-ext-validator
--enable-ext-watch-window
--enable-ext-wiki-publisher
--enable-dbus
--enable-graphite
--enable-evolution2
--enable-werror
--enable-debug
--enable-dbgutil
--enable-crashdump
--enable-kde4
--enable-dependency-tracking

compiled on x86 32, gcc Debian 4.6.1-4

Should i do a make clean ?

Julien.