Manually-specified variables were not used by the project (gtest):

CMAKE_CXX_FLAGS_LIBSTDCPP
-- Build files have been written to:: arrayfire/build/third_party/gtest/src/googletest-build

arrayfire/src/backend/cpu/inverse.cpp:64:9: warning: unused variable ‘out’ [-Wunused-variable]

arrayfire/src/backend/cpu/solve.cpp:85:13: warning: unused variable ‘info’ [-Wunused-variable]

arrayfire/src/backend/opencl/magma/geqrf3.cpp:81:20: warning: unused variable ‘cpu_trtri’ [-Wunused-variable]

arrayfire/src/backend/opencl/magma/unmqr.cpp:174:20: warning: variable ‘lddwork’ set but not used [-Wunused-but-set-variable]

arrayfire/src/backend/opencl/magma/ungqr.cpp:80:32: warning: variable ‘iinfo’ set but not used [-Wunused-but-set-variable]

arrayfire/src/backend/opencl/kernel/orb.hpp: In function ‘void opencl::kernel::orb(unsigned int*, opencl::Param&, opencl::Param&, opencl::Param&, opencl::Param&, opencl::Param&, opencl::Param&, opencl::Param, float, unsigned int, float, unsigned int, bool) [with T = float; convAccT = float]’:
arrayfire/src/backend/opencl/kernel/orb.hpp:251:13: warning: ‘d_y_feat.opencl::Param::data’ may be used uninitialized in this function [-Wmaybe-uninitialized]
         bufferFree(d_y_feat.data);
         ^
arrayfire/src/backend/opencl/kernel/orb.hpp:250:13: warning: ‘d_x_feat.opencl::Param::data’ may be used uninitialized in this function [-Wmaybe-uninitialized]
         bufferFree(d_x_feat.data);

arrayfire/examples/financial/black_scholes_options.cpp:96:69: warning: format ‘%lu’ expects argument of type ‘long unsigned int’, but argument 2 has type ‘dim_t {aka long long int}’ [-Wformat=]