1.16rc1 doesn't build without adding -fPIC to CXXFLAGS

[yurivict]

ld: error: relocation R_X86_64_PC32 cannot be used against symbol __stack_chk_guard; recompile with -fPIC
>>> defined in /lib/libc.so.7
>>> referenced by thread_pool_extension.cpp
>>>               thread_pool_extension.cpp.o:(dlib::thread_pool_implementation::thread_pool_implementation(unsigned long)) in archive /usr/local/lib/libdlib.a

ld: error: can't create dynamic relocation R_X86_64_32 against symbol: vtable for dlib::memory_manager_stateless_kernel_1<dlib::thread_pool_implementation::task_state_type> in readonly segment; recompile object files with -fPIC or pass '-Wl,-z,notext' to allow text relocations in the output
>>> defined in /usr/local/lib/libdlib.a(thread_pool_extension.cpp.o)
>>> referenced by thread_pool_extension.cpp
>>>               thread_pool_extension.cpp.o:(dlib::thread_pool_implementation::thread_pool_implementation(unsigned long)) in archive /usr/local/lib/libdlib.a

ld: error: can't create dynamic relocation R_X86_64_32 against symbol: vtable for dlib::array<dlib::thread_pool_implementation::task_state_type, dlib::memory_manager_stateless_kernel_1<char> > in readonly segment; recompile object files with -fPIC or pass '-Wl,-z,notext' to allow text relocations in the output
>>> defined in /usr/local/lib/libdlib.a(thread_pool_extension.cpp.o)
>>> referenced by thread_pool_extension.cpp
>>>               thread_pool_extension.cpp.o:(dlib::thread_pool_implementation::thread_pool_implementation(unsigned long)) in archive /usr/local/lib/libdlib.a

FreeBSD 12.2

[jschueller]

seems its rather dlib which has been statically built without fpic