Failed to build QtLocation

g++ shared -Wl,-out-implib,C:\SDK\sources\qt5\qtlocation\imports\QtLocation\libdeclarative_locationd.a -o ..\..\..\imports\QtLocation\declarative_locationd.dll object_script.declarative_locationd.Debug -lglu32 -lopengl32 -lgdi32 -luser32 -L../../3rdparty/poly2tri -lpoly2tri -L../../3rdparty/poly2tri/debug -LC:/SDK/sources/qt5/qtdeclarative/lib -lQtQuickd5 -LC:/SDK/sources/qt5/qtdeclarative/lib -lQtQmld5 -LC:/SDK/sources/qt5/qt3d/lib -lQt3Dd5 -LC:/SDK/sources/qt5/qtlocation/lib -lQtLocationd5 -LC:/SDK/sources/qt5/qtbase/lib -lQtNetworkd5 -LC:/SDK/sources/qt5/qtbase/lib -lQtGuid5 -LC:/SDK/sources/qt5/qtjsbackend/lib -lQtV8d5 -LC:/SDK/sources/qt5/qtbase/lib -lQtCored5
c:/sdk/mingw32/bin/../lib/gcc/i686-w64-mingw32/4.7.2/../../../../i686-w64-mingw32/bin/ld.exe: cannot find -lpoly2tri
collect2.exe: error: ld returned 1 exit status
Makefile.Release:224: recipe for target '..\..\..\imports\QtLocation\declarative_location.dll' failed
mingw32-make[5]: *** [..\..\..\imports\QtLocation\declarative_location.dll] Error 1
mingw32-make[5]: Leaving directory 'C:/SDK/sources/qt5/qtlocation/src/imports/location'
Makefile:51: recipe for target 'release-all' failed