Windows XP, cannot link rev 14858

using btool and devlibs 61, I get the following errors:

##### Target : link
##### link objects and library to create executable
--- link / rc
--- link / link
Make error line 460: LINK problem: build\obj\extension\plugins\grid2\grid.o:grid
.cpp:(.text+0x0): multiple definition of `Inkscape::Extension::Internal::Grid::l
oad(Inkscape::Extension::Extension*)'
build\obj\extension\internal\grid.o:grid.cpp:(.text+0x0): first defined here
build\obj\extension\plugins\grid2\grid.o:grid.cpp:(.text+0x18): multiple definit
ion of `Inkscape::Extension::Internal::Grid::prefs_effect(Inkscape::Extension::E
ffect*, Inkscape::UI::View::View*, sigc::signal<void, sigc::nil, sigc::nil, sigc
::nil, sigc::nil, sigc::nil, sigc::nil, sigc::nil>*, Inkscape::Extension::Implem
entation::ImplementationDocumentCache*)'
build\obj\extension\internal\grid.o:grid.cpp:(.text+0x18): first defined here
build\obj\extension\plugins\grid2\grid.o:grid.cpp:(.text+0x1c0): multiple defini
tion of `Inkscape::Extension::Internal::PrefAdjustment::val_changed()'
build\obj\extension\internal\grid.o:grid.cpp:(.text+0x19c): first defined here
build\obj\extension\plugins\grid2\grid.o:grid.cpp:(.text+0x200): multiple defini
tion of `Inkscape::Extension::Internal::Grid::effect(Inkscape::Extension::Effect
*, Inkscape::UI::View::View*, Inkscape::Extension::Implementation::Implementatio
nDocumentCache*)'
build\obj\extension\internal\grid.o:grid.cpp:(.text+0x208): first defined here
build\obj\inkscape-version.o:inkscape-version.cpp:(.data+0x0): multiple definiti
on of `Inkscape::version_string'
build\obj\extension\plugins\grid2\grid.o:grid.cpp:(.data+0x0): first defined her
e
collect2: ld returned 1 exit status