So, I finally found how to see the invoked command! In the common.mk file, I saw # check if verbose ifeq ($(verbose), 1) VERBOSE := else VERBOSE := @ Endif With an ugly workaround, I changed it to # check if verbose ifeq ($(verbose), 1) VERBOSE := else VERBOSE := endif I didn’t want to have another pain for “finding how the verbose variable is set in the Makefile”!!! Here is the full output with the command. The libraries do exist, so why on earth it can not link :( mahmood@vb:AES$ g++ -fPIC -L/home/mahmood/boost_1_54_0/stage/lib -lboost_filesystem -lboost_system -m64 -o /home/mahmood/gpgpu-sim_distribution/ispass2009-benchmarks/bin/release/AES obj/x86_64/release/aescuda.cpp.o obj/x86_64/release/aesCudaUtils.cpp.o obj/x86_64/release/aesHost.cu.o -L/usr/local/cuda/lib64 -L/home/mahmood/NVIDIA_GPU_Computing_SDK/C/src//../lib -L/home/mahmood/NVIDIA_GPU_Computing_SDK/C/src//../common/lib/linux -L/home/mahmood/NVIDIA_GPU_Computing_SDK/C/src//../../shared//lib -lcudart -L/usr/local/cuda/lib64 -L/home/mahmood/NVIDIA_GPU_Computing_SDK/C/src//../lib -L/home/mahmood/NVIDIA_GPU_Computing_SDK/C/src//../common/lib/linux -L/home/mahmood/NVIDIA_GPU_Computing_SDK/C/src//../../shared//lib -lcudart -lcutil_x86_64 -lshrutil_x86_64 obj/x86_64/release/aescuda.cpp.o: In function `_GLOBAL__sub_I_aescuda.cpp': aescuda.cpp:(.text.startup+0x68b): undefined reference to `boost::system::get_system_category()' aescuda.cpp:(.text.startup+0x697): undefined reference to `boost::system::get_generic_category()' aescuda.cpp:(.text.startup+0x6a3): undefined reference to `boost::system::get_generic_category()' aescuda.cpp:(.text.startup+0x6af): undefined reference to `boost::system::get_generic_category()' aescuda.cpp:(.text.startup+0x6bb): undefined reference to `boost::system::get_system_category()' obj/x86_64/release/aesCudaUtils.cpp.o: In function `boost::enable_if<boost::filesystem::is_basic_path<boost::filesystem::basic_path<std::basic_string<char, std::char_traits<char>, std::allocator<char> >, boost::filesystem::path_traits> >, bool>::type boost::filesystem::exists<boost::filesystem::basic_path<std::basic_string<char, std::char_traits<char>, std::allocator<char> >, boost::filesystem::path_traits> >(boost::filesystem::basic_path<std::basic_string<char, std::char_traits<char>, std::allocator<char> >, boost::filesystem::path_traits> const&)': aesCudaUtils.cpp:(.text._ZN5boost10filesystem6existsINS0_10basic_pathISsNS0_11path_traitsEEEEENS_9enable_ifINS0_13is_basic_pathIT_EEbE4typeERKS7_[boost::enable_if<boost::filesystem::is_basic_path<boost::filesystem::basic_path<std::basic_string<char, std::char_traits<char>, std::allocator<char> >, boost::filesystem::path_traits> >, bool>::type boost::filesystem::exists<boost::filesystem::basic_path<std::basic_string<char, std::char_traits<char>, std::allocator<char> >, boost::filesystem::path_traits> >(boost::filesystem::basic_path<std::basic_string<char, std::char_traits<char>, std::allocator<char> >, boost::filesystem::path_traits> const&)]+0x22): undefined reference to `boost::system::get_system_category()' aesCudaUtils.cpp:(.text._ZN5boost10filesystem6existsINS0_10basic_pathISsNS0_11path_traitsEEEEENS_9enable_ifINS0_13is_basic_pathIT_EEbE4typeERKS7_[boost::enable_if<boost::filesystem::is_basic_path<boost::filesystem::basic_path<std::basic_string<char, std::char_traits<char>, std::allocator<char> >, boost::filesystem::path_traits> >, bool>::type boost::filesystem::exists<boost::filesystem::basic_path<std::basic_string<char, std::char_traits<char>, std::allocator<char> >, boost::filesystem::path_traits> >(boost::filesystem::basic_path<std::basic_string<char, std::char_traits<char>, std::allocator<char> >, boost::filesystem::path_traits> const&)]+0x6b): undefined reference to `boost::filesystem::detail::status_api(std::basic_string<char, std::char_traits<char>, std::allocator<char> > const&, boost::system::error_code&)' obj/x86_64/release/aesCudaUtils.cpp.o: In function `boost::enable_if<boost::filesystem::is_basic_path<boost::filesystem::basic_path<std::basic_string<char, std::char_traits<char>, std::allocator<char> >, boost::filesystem::path_traits> >, unsigned long>::type boost::filesystem::file_size<boost::filesystem::basic_path<std::basic_string<char, std::char_traits<char>, std::allocator<char> >, boost::filesystem::path_traits> >(boost::filesystem::basic_path<std::basic_string<char, std::char_traits<char>, std::allocator<char> >, boost::filesystem::path_traits> const&)': aesCudaUtils.cpp:(.text._ZN5boost10filesystem9file_sizeINS0_10basic_pathISsNS0_11path_traitsEEEEENS_9enable_ifINS0_13is_basic_pathIT_EEmE4typeERKS7_[boost::enable_if<boost::filesystem::is_basic_path<boost::filesystem::basic_path<std::basic_string<char, std::char_traits<char>, std::allocator<char> >, boost::filesystem::path_traits> >, unsigned long>::type boost::filesystem::file_size<boost::filesystem::basic_path<std::basic_string<char, std::char_traits<char>, std::allocator<char> >, boost::filesystem::path_traits> >(boost::filesystem::basic_path<std::basic_string<char, std::char_traits<char>, std::allocator<char> >, boost::filesystem::path_traits> const&)]+0x55): undefined reference to `boost::filesystem::detail::file_size_api(std::basic_string<char, std::char_traits<char>, std::allocator<char> > const&)' obj/x86_64/release/aesCudaUtils.cpp.o: In function `_GLOBAL__sub_I_aesCudaUtils.cpp': aesCudaUtils.cpp:(.text.startup+0x5): undefined reference to `boost::system::get_system_category()' aesCudaUtils.cpp:(.text.startup+0x11): undefined reference to `boost::system::get_generic_category()' aesCudaUtils.cpp:(.text.startup+0x1d): undefined reference to `boost::system::get_generic_category()' aesCudaUtils.cpp:(.text.startup+0x29): undefined reference to `boost::system::get_generic_category()' aesCudaUtils.cpp:(.text.startup+0x35): undefined reference to `boost::system::get_system_category()' collect2: ld returned 1 exit status mahmood@vb:AES$ ls /home/mahmood/boost_1_54_0/stage/lib/libboost_system.* /home/mahmood/boost_1_54_0/stage/lib/libboost_system.a /home/mahmood/boost_1_54_0/stage/lib/libboost_system.so /home/mahmood/boost_1_54_0/stage/lib/libboost_system.so.1.54.0 mahmood@vb:AES$ ls /home/mahmood/boost_1_54_0/stage/lib/libboost_filesystem..* /home/mahmood/boost_1_54_0/stage/lib/libboost_filesystem.a /home/mahmood/boost_1_54_0/stage/lib/libboost_filesystem.so /home/mahmood/boost_1_54_0/stage/lib/libboost_filesystem.so.1.54.0 mahmood@vb:AES$ Sent from Mail for Windows 10