compilation of unit tests fails on FreeBSD 11.2

I was using gtest 1.8.0.

./configure command:

./configure --with-gtest-source=/usr/src/googletest-release-1.8.0/googletest/ --with-boost-include=/usr/local/include --with-boost-lib-dir=/usr/local/lib

failure:

CXXLD    run_unittests
run_unittests-socketsession_unittest.o: In function `(anonymous namespace)::ForwardTest_pushAndPop_Test::TestBody()':
/usr/home/vagrant/kea-src/src/lib/util/tests/socketsession_unittest.cc:564: undefined reference to `testing::ScopedTrace::~ScopedTrace()'
/usr/home/vagrant/kea-src/src/lib/util/tests/socketsession_unittest.cc:570: undefined reference to `testing::ScopedTrace::~ScopedTrace()'
/usr/home/vagrant/kea-src/src/lib/util/tests/socketsession_unittest.cc:582: undefined reference to `testing::ScopedTrace::~ScopedTrace()'
/usr/home/vagrant/kea-src/src/lib/util/tests/socketsession_unittest.cc:588: undefined reference to `testing::ScopedTrace::~ScopedTrace()'
/usr/home/vagrant/kea-src/src/lib/util/tests/socketsession_unittest.cc:596: undefined reference to `testing::ScopedTrace::~ScopedTrace()'
run_unittests-socketsession_unittest.o:/usr/home/vagrant/kea-src/src/lib/util/tests/socketsession_unittest.cc:602: more undefined references to `testing::ScopedTrace::~ScopedTrace()' follow
run_unittests-socketsession_unittest.o: In function `testing::ScopedTrace::ScopedTrace(char const*, int, char const*)':
/usr/local/include/gtest/gtest.h:2172: undefined reference to `testing::ScopedTrace::PushTrace(char const*, int, std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> >)'
c++: error: linker command failed with exit code 1 (use -v to see invocation)