Example compile error on Wandboard platform

I tried to compile the example recommended in doc http://openframeworks.cc/setup/armv7/
cd OF_ROOT/examples/graphics/polygonExample
make
But I get the error, of which I report the last lines:

/opt/of_v0.9.7_linuxarmv7l_release/libs/poco/lib/linuxarmv7l/libPocoFoundation.a(DeflatingStream.o): In function Poco::DeflatingStreamBuf::writeToDevice(char const*, int)': DeflatingStream.cpp:(.text+0x380): undefined reference to std::__cxx11::basic_string<char, std::char_traits, std::allocator >::_M_create(unsigned int&, unsigned int)'
/opt/of_v0.9.7_linuxarmv7l_release/libs/poco/lib/linuxarmv7l/libPocoFoundation.a(DeflatingStream.o): In function Poco::DeflatingStreamBuf::sync()': DeflatingStream.cpp:(.text+0x5e6): undefined reference to std::__cxx11::basic_string<char, std::char_traits, std::allocator >::_M_create(unsigned int&, unsigned int)'
DeflatingStream.cpp:(.text+0x622): undefined reference to std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >::_M_create(unsigned int&, unsigned int)' /opt/of_v0.9.7_linuxarmv7l_release/libs/poco/lib/linuxarmv7l/libPocoFoundation.a(DeflatingStream.o):DeflatingStream.cpp:(.text+0xe22): more undefined references to std::__cxx11::basic_string<char, std::char_traits, std::allocator >::_M_create(unsigned int&, unsigned int)' follow
collect2: error: ld returned 1 exit status
/opt/of_v0.9.7_linuxarmv7l_release/libs/openFrameworksCompiled/project/makefileCommon/compile.project.mk:382: recipe for target 'bin/polygonExample' failed
make[1]: *** [bin/polygonExample] Error 1
make[1]: Leaving directory '/opt/of_v0.9.7_linuxarmv7l_release/examples/graphics/polygonExample'
/opt/of_v0.9.7_linuxarmv7l_release/libs/openFrameworksCompiled/project/makefileCommon/compile.project.mk:125: recipe for target 'Release' failed
make: *** [Release] Error 2

Reproduce the failure from the ARMv7 setup documentation in examples/graphics/polygonExample with make, then inspect the linker output and libs/openFrameworksCompiled/project/makefileCommon/compile.project.mk. Compare the example's build configuration with the bundled libs/poco/lib/linuxarmv7l/libPocoFoundation.a; done means the polygonExample target links and builds successfully on the Wandboard platform.