******************************************************************************** conan install dlib/19.19@#9d90afbfcc9cedbbad96516fa70a97bd --build=dlib -pr /home/conan/w/prod/BuildSingleReference/269023/32589a4d-9a51-4f16-8e55-b76e085397f2/profile_linux_7_libstdcpp11_gcc_release_64.dlib-shared-True.txt -c tools.system.package_manager:mode=install -c tools.system.package_manager:sudo=True ******************************************************************************** Auto detecting your dev setup to initialize the default profile (/home/conan/w/prod/BuildSingleReference/.conan/profiles/default) CC and CXX: /usr/bin/gcc, /usr/bin/g++ Found gcc 7 gcc>=5, using the major as version ************************* WARNING: GCC OLD ABI COMPATIBILITY *********************** Conan detected a GCC version > 5 but has adjusted the 'compiler.libcxx' setting to 'libstdc++' for backwards compatibility. Your compiler is likely using the new CXX11 ABI by default (libstdc++11). If you want Conan to use the new ABI for the default profile, run: $ conan profile update settings.compiler.libcxx=libstdc++11 default Or edit '/home/conan/w/prod/BuildSingleReference/.conan/profiles/default' and set compiler.libcxx=libstdc++11 ************************************************************************************ Default settings os=Linux os_build=Linux arch=x86_64 arch_build=x86_64 compiler=gcc compiler.version=7 compiler.libcxx=libstdc++ build_type=Release *** You can change them in /home/conan/w/prod/BuildSingleReference/.conan/profiles/default *** *** Or override with -s compiler='other' -s ...s*** Configuration: [settings] arch=x86_64 build_type=Release compiler=gcc compiler.libcxx=libstdc++11 compiler.version=7 os=Linux [options] dlib:shared=True [build_requires] [env] [conf] tools.system.package_manager:mode=install tools.system.package_manager:sudo=True giflib/5.2.1: Not found in local cache, looking in remotes... giflib/5.2.1: Trying with 'conan-center'... Downloading conanmanifest.txt Downloading conanfile.py Downloading conan_export.tgz giflib/5.2.1: Downloaded recipe revision 15033c544d771fa992cda180c0a1f8e0 libjpeg/9e: Not found in local cache, looking in remotes... libjpeg/9e: Trying with 'conan-center'... Downloading conanmanifest.txt Downloading conanfile.py Downloading conan_export.tgz libjpeg/9e: Downloaded recipe revision 68269859e4325ddc3f995d1fd3fc9187 libpng/1.6.40: Not found in local cache, looking in remotes... libpng/1.6.40: Trying with 'conan-center'... Downloading conanmanifest.txt Downloading conanfile.py Downloading conan_export.tgz libpng/1.6.40: Downloaded recipe revision 3b63a2aa000933a57a53322207790714 zlib/1.2.13: Not found in local cache, looking in remotes... zlib/1.2.13: Trying with 'conan-center'... Downloading conanmanifest.txt Downloading conanfile.py Downloading conan_export.tgz zlib/1.2.13: Downloaded recipe revision e377bee636333ae348d51ca90874e353 sqlite3/3.42.0: Not found in local cache, looking in remotes... sqlite3/3.42.0: Trying with 'conan-center'... Downloading conanmanifest.txt Downloading conanfile.py Downloading conan_export.tgz sqlite3/3.42.0: Downloaded recipe revision a731fc3f0c93706bb5ced39cdee508d5 openblas/0.3.20: Not found in local cache, looking in remotes... openblas/0.3.20: Trying with 'conan-center'... Downloading conanmanifest.txt Downloading conanfile.py Downloading conan_export.tgz openblas/0.3.20: Downloaded recipe revision bc54895c0f1f0a58c8ea414a3be55950 dlib/19.19: Forced build from source Installing package: dlib/19.19 Requirements dlib/19.19 from local cache - Cache giflib/5.2.1 from 'conan-center' - Downloaded libjpeg/9e from 'conan-center' - Downloaded libpng/1.6.40 from 'conan-center' - Downloaded openblas/0.3.20 from 'conan-center' - Downloaded sqlite3/3.42.0 from 'conan-center' - Downloaded zlib/1.2.13 from 'conan-center' - Downloaded Packages dlib/19.19:2deb7304a91b7e1f00df151ebd797c9d6e7bafbe - Build giflib/5.2.1:5b76c6b6b7aa7b927c8abb068a92dbace065bd71 - Download libjpeg/9e:d50a0d523d98c15bb147b18fa7d203887c38be8b - Download libpng/1.6.40:9378b660d2155d53cea1126fa13164a3bfa59f2c - Download openblas/0.3.20:f93d34643c88c224fda3561071907c785870b96b - Download sqlite3/3.42.0:602f5828480e5578e887d46c0ce90f4774b4df1f - Download zlib/1.2.13:d50a0d523d98c15bb147b18fa7d203887c38be8b - Download Installing (downloading, building) binaries... giflib/5.2.1: Retrieving package 5b76c6b6b7aa7b927c8abb068a92dbace065bd71 from remote 'conan-center' Downloading conanmanifest.txt Downloading conaninfo.txt Downloading conan_package.tgz giflib/5.2.1: Package installed 5b76c6b6b7aa7b927c8abb068a92dbace065bd71 giflib/5.2.1: Downloaded package revision 16cfdadde422ddf21d3879aeca3a32f1 libjpeg/9e: Retrieving package d50a0d523d98c15bb147b18fa7d203887c38be8b from remote 'conan-center' Downloading conanmanifest.txt Downloading conaninfo.txt Downloading conan_package.tgz libjpeg/9e: Package installed d50a0d523d98c15bb147b18fa7d203887c38be8b libjpeg/9e: Downloaded package revision c898f0651cd34bab23b9d82e4fe13c9c openblas/0.3.20: Retrieving package f93d34643c88c224fda3561071907c785870b96b from remote 'conan-center' Downloading conanmanifest.txt Downloading conaninfo.txt Downloading conan_package.tgz openblas/0.3.20: Package installed f93d34643c88c224fda3561071907c785870b96b openblas/0.3.20: Downloaded package revision 3dfde8a80ecbed0647beac0788842c49 sqlite3/3.42.0: Retrieving package 602f5828480e5578e887d46c0ce90f4774b4df1f from remote 'conan-center' Downloading conanmanifest.txt Downloading conaninfo.txt Downloading conan_package.tgz sqlite3/3.42.0: Package installed 602f5828480e5578e887d46c0ce90f4774b4df1f sqlite3/3.42.0: Downloaded package revision 6faa7726172db0b1c22a86668750f18c zlib/1.2.13: Retrieving package d50a0d523d98c15bb147b18fa7d203887c38be8b from remote 'conan-center' Downloading conanmanifest.txt Downloading conaninfo.txt Downloading conan_package.tgz zlib/1.2.13: Package installed d50a0d523d98c15bb147b18fa7d203887c38be8b zlib/1.2.13: Downloaded package revision 2145c0abb62f5d69f229538a813e6c54 libpng/1.6.40: Retrieving package 9378b660d2155d53cea1126fa13164a3bfa59f2c from remote 'conan-center' Downloading conanmanifest.txt Downloading conaninfo.txt Downloading conan_package.tgz libpng/1.6.40: Package installed 9378b660d2155d53cea1126fa13164a3bfa59f2c libpng/1.6.40: Downloaded package revision 492f7b416da96e93f482a56e46c799e5 openblas/0.3.20: Setting OpenBLAS_HOME environment variable: /home/conan/w/prod/BuildSingleReference/.conan/data/openblas/0.3.20/_/_/package/f93d34643c88c224fda3561071907c785870b96b [HOOK - conan-center.py] pre_source(): [IMMUTABLE SOURCES (KB-H010)] OK dlib/19.19: Configuring sources in /home/conan/w/prod/BuildSingleReference/.conan/data/dlib/19.19/_/_/source dlib/19.19: [HOOK - conan-center.py] post_source(): [LIBCXX MANAGEMENT (KB-H011)] OK [HOOK - conan-center.py] post_source(): [CPPSTD MANAGEMENT (KB-H022)] OK [HOOK - conan-center.py] post_source(): [SHORT_PATHS USAGE (KB-H066)] OK dlib/19.19: Copying sources to build folder dlib/19.19: Building your package in /home/conan/w/prod/BuildSingleReference/.conan/data/dlib/19.19/_/_/build/2deb7304a91b7e1f00df151ebd797c9d6e7bafbe dlib/19.19: Generator txt created conanbuildinfo.txt dlib/19.19: Calling generate() dlib/19.19: Preset 'release' added to CMakePresets.json. Invoke it manually using 'cmake --preset release' dlib/19.19: If your CMake version is not compatible with CMakePresets (<3.19) call cmake like: 'cmake -G "Unix Makefiles" -DCMAKE_TOOLCHAIN_FILE=/home/conan/w/prod/BuildSingleReference/.conan/data/dlib/19.19/_/_/build/2deb7304a91b7e1f00df151ebd797c9d6e7bafbe/conan_toolchain.cmake -DCMAKE_POLICY_DEFAULT_CMP0091=NEW -DCMAKE_BUILD_TYPE=Release' dlib/19.19: Aggregating env generators [HOOK - conan-center.py] pre_build(): [FPIC MANAGEMENT (KB-H007)] 'fPIC' option not found [HOOK - conan-center.py] pre_build(): [FPIC MANAGEMENT (KB-H007)] OK dlib/19.19: Calling build() dlib/19.19: CMake command: cmake -G "Unix Makefiles" -DCMAKE_TOOLCHAIN_FILE="/home/conan/w/prod/BuildSingleReference/.conan/data/dlib/19.19/_/_/build/2deb7304a91b7e1f00df151ebd797c9d6e7bafbe/conan_toolchain.cmake" -DCMAKE_INSTALL_PREFIX="/home/conan/w/prod/BuildSingleReference/.conan/data/dlib/19.19/_/_/package/2deb7304a91b7e1f00df151ebd797c9d6e7bafbe" -DCMAKE_POLICY_DEFAULT_CMP0091="NEW" -DCMAKE_BUILD_TYPE="Release" "/home/conan/w/prod/BuildSingleReference/.conan/data/dlib/19.19/_/_/build/2deb7304a91b7e1f00df151ebd797c9d6e7bafbe/dlib" ----Running------ > cmake -G "Unix Makefiles" -DCMAKE_TOOLCHAIN_FILE="/home/conan/w/prod/BuildSingleReference/.conan/data/dlib/19.19/_/_/build/2deb7304a91b7e1f00df151ebd797c9d6e7bafbe/conan_toolchain.cmake" -DCMAKE_INSTALL_PREFIX="/home/conan/w/prod/BuildSingleReference/.conan/data/dlib/19.19/_/_/package/2deb7304a91b7e1f00df151ebd797c9d6e7bafbe" -DCMAKE_POLICY_DEFAULT_CMP0091="NEW" -DCMAKE_BUILD_TYPE="Release" "/home/conan/w/prod/BuildSingleReference/.conan/data/dlib/19.19/_/_/build/2deb7304a91b7e1f00df151ebd797c9d6e7bafbe/dlib" ----------------- -- Using Conan toolchain: /home/conan/w/prod/BuildSingleReference/.conan/data/dlib/19.19/_/_/build/2deb7304a91b7e1f00df151ebd797c9d6e7bafbe/conan_toolchain.cmake -- Conan toolchain: Setting BUILD_SHARED_LIBS = ON -- The C compiler identification is GNU 7.5.0 -- The CXX compiler identification is GNU 7.5.0 -- Detecting C compiler ABI info -- Detecting C compiler ABI info - done -- Check for working C compiler: /usr/bin/gcc - skipped -- Detecting C compile features -- Detecting C compile features - done -- Detecting CXX compiler ABI info -- Detecting CXX compiler ABI info - done -- Check for working CXX compiler: /usr/bin/g++ - skipped -- Detecting CXX compile features -- Detecting CXX compile features - done -- Using CMake version: 3.18.2 -- Compiling dlib version: 19.19.0 -- Looking for pthread.h -- Looking for pthread.h - found -- Performing Test CMAKE_HAVE_LIBC_PTHREAD -- Performing Test CMAKE_HAVE_LIBC_PTHREAD - Failed -- Looking for pthread_create in pthreads -- Looking for pthread_create in pthreads - not found -- Looking for pthread_create in pthread -- Looking for pthread_create in pthread - found -- Found Threads: TRUE -- Found system copy of libpng: PNG::PNG -- Found system copy of libjpeg: JPEG::JPEG -- Searching for BLAS and LAPACK -- Searching for BLAS and LAPACK -- Found PkgConfig: /usr/bin/pkg-config (found version "0.29.1") -- Checking for module 'cblas' -- No package 'cblas' found -- Checking for module 'lapack' -- No package 'lapack' found -- Looking for sys/types.h -- Looking for sys/types.h - found -- Looking for stdint.h -- Looking for stdint.h - found -- Looking for stddef.h -- Looking for stddef.h - found -- Check size of void* -- Check size of void* - done -- Found OpenBLAS library -- Looking for sgetrf_single -- Looking for sgetrf_single - not found -- Looking for cblas_ddot -- Looking for cblas_ddot - not found -- BLAS library does not have cblas symbols, so dlib will not use BLAS or LAPACK -- Found BLAS: /home/conan/w/prod/BuildSingleReference/.conan/data/openblas/0.3.20/_/_/package/f93d34643c88c224fda3561071907c785870b96b/lib/libopenblas.a;-lpthread -- Conan: Component target declared 'SQLite::SQLite3' -- C++11 activated. -- Configuring done -- Generating done -- Build files have been written to: /home/conan/w/prod/BuildSingleReference/.conan/data/dlib/19.19/_/_/build/2deb7304a91b7e1f00df151ebd797c9d6e7bafbe dlib/19.19: CMake command: cmake --build "/home/conan/w/prod/BuildSingleReference/.conan/data/dlib/19.19/_/_/build/2deb7304a91b7e1f00df151ebd797c9d6e7bafbe" '--' '-j3' ----Running------ > cmake --build "/home/conan/w/prod/BuildSingleReference/.conan/data/dlib/19.19/_/_/build/2deb7304a91b7e1f00df151ebd797c9d6e7bafbe" '--' '-j3' ----------------- Scanning dependencies of target dlib [ 1%] Building CXX object CMakeFiles/dlib.dir/base64/base64_kernel_1.cpp.o [ 3%] Building CXX object CMakeFiles/dlib.dir/bigint/bigint_kernel_1.cpp.o [ 5%] Building CXX object CMakeFiles/dlib.dir/bigint/bigint_kernel_2.cpp.o [ 7%] Building CXX object CMakeFiles/dlib.dir/bit_stream/bit_stream_kernel_1.cpp.o [ 9%] Building CXX object CMakeFiles/dlib.dir/entropy_decoder/entropy_decoder_kernel_1.cpp.o [ 11%] Building CXX object CMakeFiles/dlib.dir/entropy_decoder/entropy_decoder_kernel_2.cpp.o [ 13%] Building CXX object CMakeFiles/dlib.dir/entropy_encoder/entropy_encoder_kernel_1.cpp.o [ 15%] Building CXX object CMakeFiles/dlib.dir/entropy_encoder/entropy_encoder_kernel_2.cpp.o [ 17%] Building CXX object CMakeFiles/dlib.dir/md5/md5_kernel_1.cpp.o [ 19%] Building CXX object CMakeFiles/dlib.dir/tokenizer/tokenizer_kernel_1.cpp.o [ 21%] Building CXX object CMakeFiles/dlib.dir/unicode/unicode.cpp.o [ 23%] Building CXX object CMakeFiles/dlib.dir/data_io/image_dataset_metadata.cpp.o [ 25%] Building CXX object CMakeFiles/dlib.dir/data_io/mnist.cpp.o [ 27%] Building CXX object CMakeFiles/dlib.dir/global_optimization/global_function_search.cpp.o [ 29%] Building CXX object CMakeFiles/dlib.dir/filtering/kalman_filter.cpp.o [ 31%] Building CXX object CMakeFiles/dlib.dir/test_for_odr_violations.cpp.o [ 33%] Building CXX object CMakeFiles/dlib.dir/svm/auto.cpp.o [ 35%] Building CXX object CMakeFiles/dlib.dir/sockets/sockets_kernel_1.cpp.o [ 37%] Building CXX object CMakeFiles/dlib.dir/bsp/bsp.cpp.o [ 39%] Building CXX object CMakeFiles/dlib.dir/dir_nav/dir_nav_kernel_1.cpp.o [ 41%] Building CXX object CMakeFiles/dlib.dir/dir_nav/dir_nav_kernel_2.cpp.o [ 43%] Building CXX object CMakeFiles/dlib.dir/dir_nav/dir_nav_extensions.cpp.o [ 45%] Building CXX object CMakeFiles/dlib.dir/linker/linker_kernel_1.cpp.o [ 47%] Building CXX object CMakeFiles/dlib.dir/logger/extra_logger_headers.cpp.o [ 49%] Building CXX object CMakeFiles/dlib.dir/logger/logger_kernel_1.cpp.o [ 50%] Building CXX object CMakeFiles/dlib.dir/logger/logger_config_file.cpp.o [ 52%] Building CXX object CMakeFiles/dlib.dir/misc_api/misc_api_kernel_1.cpp.o [ 54%] Building CXX object CMakeFiles/dlib.dir/misc_api/misc_api_kernel_2.cpp.o [ 56%] Building CXX object CMakeFiles/dlib.dir/sockets/sockets_extensions.cpp.o [ 58%] Building CXX object CMakeFiles/dlib.dir/sockets/sockets_kernel_2.cpp.o [ 60%] Building CXX object CMakeFiles/dlib.dir/sockstreambuf/sockstreambuf.cpp.o [ 62%] Building CXX object CMakeFiles/dlib.dir/sockstreambuf/sockstreambuf_unbuffered.cpp.o [ 64%] Building CXX object CMakeFiles/dlib.dir/server/server_kernel.cpp.o [ 66%] Building CXX object CMakeFiles/dlib.dir/server/server_iostream.cpp.o [ 68%] Building CXX object CMakeFiles/dlib.dir/server/server_http.cpp.o [ 70%] Building CXX object CMakeFiles/dlib.dir/threads/multithreaded_object_extension.cpp.o [ 72%] Building CXX object CMakeFiles/dlib.dir/threads/threaded_object_extension.cpp.o [ 74%] Building CXX object CMakeFiles/dlib.dir/threads/threads_kernel_1.cpp.o [ 76%] Building CXX object CMakeFiles/dlib.dir/threads/threads_kernel_2.cpp.o [ 78%] Building CXX object CMakeFiles/dlib.dir/threads/threads_kernel_shared.cpp.o [ 80%] Building CXX object CMakeFiles/dlib.dir/threads/thread_pool_extension.cpp.o [ 82%] Building CXX object CMakeFiles/dlib.dir/threads/async.cpp.o [ 84%] Building CXX object CMakeFiles/dlib.dir/timer/timer.cpp.o [ 86%] Building CXX object CMakeFiles/dlib.dir/stack_trace.cpp.o [ 88%] Building CXX object CMakeFiles/dlib.dir/cuda/cpu_dlib.cpp.o [ 90%] Building CXX object CMakeFiles/dlib.dir/cuda/tensor_tools.cpp.o [ 92%] Building CXX object CMakeFiles/dlib.dir/image_loader/png_loader.cpp.o [ 94%] Building CXX object CMakeFiles/dlib.dir/image_saver/save_png.cpp.o [ 96%] Building CXX object CMakeFiles/dlib.dir/image_loader/jpeg_loader.cpp.o [ 98%] Building CXX object CMakeFiles/dlib.dir/image_saver/save_jpeg.cpp.o [100%] Linking CXX shared library libdlib.so [100%] Built target dlib dlib/19.19: Package '2deb7304a91b7e1f00df151ebd797c9d6e7bafbe' built dlib/19.19: Build folder /home/conan/w/prod/BuildSingleReference/.conan/data/dlib/19.19/_/_/build/2deb7304a91b7e1f00df151ebd797c9d6e7bafbe dlib/19.19: Generated conaninfo.txt dlib/19.19: Generated conanbuildinfo.txt dlib/19.19: Generating the package dlib/19.19: Package folder /home/conan/w/prod/BuildSingleReference/.conan/data/dlib/19.19/_/_/package/2deb7304a91b7e1f00df151ebd797c9d6e7bafbe dlib/19.19: Calling package() dlib/19.19: CMake command: cmake --install "/home/conan/w/prod/BuildSingleReference/.conan/data/dlib/19.19/_/_/build/2deb7304a91b7e1f00df151ebd797c9d6e7bafbe" --prefix "/home/conan/w/prod/BuildSingleReference/.conan/data/dlib/19.19/_/_/package/2deb7304a91b7e1f00df151ebd797c9d6e7bafbe" ----Running------ > cmake --install "/home/conan/w/prod/BuildSingleReference/.conan/data/dlib/19.19/_/_/build/2deb7304a91b7e1f00df151ebd797c9d6e7bafbe" --prefix "/home/conan/w/prod/BuildSingleReference/.conan/data/dlib/19.19/_/_/package/2deb7304a91b7e1f00df151ebd797c9d6e7bafbe" ----------------- -- Install configuration: "Release" -- Installing: /home/conan/w/prod/BuildSingleReference/.conan/data/dlib/19.19/_/_/package/2deb7304a91b7e1f00df151ebd797c9d6e7bafbe/lib/libdlib.so.19.19.0 -- Installing: /home/conan/w/prod/BuildSingleReference/.conan/data/dlib/19.19/_/_/package/2deb7304a91b7e1f00df151ebd797c9d6e7bafbe/lib/libdlib.so -- Installing: /home/conan/w/prod/BuildSingleReference/.conan/data/dlib/19.19/_/_/package/2deb7304a91b7e1f00df151ebd797c9d6e7bafbe/include/dlib/config.h -- Installing: /home/conan/w/prod/BuildSingleReference/.conan/data/dlib/19.19/_/_/package/2deb7304a91b7e1f00df151ebd797c9d6e7bafbe/include/dlib/revision.h -- Installing: /home/conan/w/prod/BuildSingleReference/.conan/data/dlib/19.19/_/_/package/2deb7304a91b7e1f00df151ebd797c9d6e7bafbe/lib/cmake/dlib/dlib.cmake -- Installing: /home/conan/w/prod/BuildSingleReference/.conan/data/dlib/19.19/_/_/package/2deb7304a91b7e1f00df151ebd797c9d6e7bafbe/lib/cmake/dlib/dlib-release.cmake -- Installing: /home/conan/w/prod/BuildSingleReference/.conan/data/dlib/19.19/_/_/package/2deb7304a91b7e1f00df151ebd797c9d6e7bafbe/lib/cmake/dlib/dlibConfig.cmake -- Installing: /home/conan/w/prod/BuildSingleReference/.conan/data/dlib/19.19/_/_/package/2deb7304a91b7e1f00df151ebd797c9d6e7bafbe/lib/cmake/dlib/dlibConfigVersion.cmake -- Installing: /home/conan/w/prod/BuildSingleReference/.conan/data/dlib/19.19/_/_/package/2deb7304a91b7e1f00df151ebd797c9d6e7bafbe/lib/pkgconfig/dlib-1.pc [HOOK - conan-center.py] post_package(): [DEFAULT PACKAGE LAYOUT (KB-H013)] OK [HOOK - conan-center.py] post_package(): [MATCHING CONFIGURATION (KB-H014)] OK [HOOK - conan-center.py] post_package(): [SHARED ARTIFACTS (KB-H015)] OK [HOOK - conan-center.py] post_package(): [STATIC ARTIFACTS (KB-H074)] OK [HOOK - conan-center.py] post_package(): [EITHER STATIC OR SHARED OF EACH LIB (KB-H076)] OK [HOOK - conan-center.py] post_package(): [PC-FILES (KB-H020)] OK [HOOK - conan-center.py] post_package(): [CMAKE-MODULES-CONFIG-FILES (KB-H016)] OK [HOOK - conan-center.py] post_package(): [PDB FILES NOT ALLOWED (KB-H017)] OK [HOOK - conan-center.py] post_package(): [LIBTOOL FILES PRESENCE (KB-H018)] OK [HOOK - conan-center.py] post_package(): [MS RUNTIME FILES (KB-H021)] OK [HOOK - conan-center.py] post_package(): [SHORT_PATHS USAGE (KB-H066)] OK [HOOK - conan-center.py] post_package(): [MISSING SYSTEM LIBS (KB-H043)] OK [HOOK - conan-center.py] post_package(): [APPLE RELOCATABLE SHARED LIBS (KB-H077)] OK In file included from /home/conan/w/prod/BuildSingleReference/.conan/data/dlib/19.19/_/_/build/2deb7304a91b7e1f00df151ebd797c9d6e7bafbe/dlib/filtering/../matrix.h:11:0, from /home/conan/w/prod/BuildSingleReference/.conan/data/dlib/19.19/_/_/build/2deb7304a91b7e1f00df151ebd797c9d6e7bafbe/dlib/filtering/kalman_filter.h:7, from /home/conan/w/prod/BuildSingleReference/.conan/data/dlib/19.19/_/_/build/2deb7304a91b7e1f00df151ebd797c9d6e7bafbe/dlib/filtering/kalman_filter.cpp:6: /home/conan/w/prod/BuildSingleReference/.conan/data/dlib/19.19/_/_/build/2deb7304a91b7e1f00df151ebd797c9d6e7bafbe/dlib/filtering/../matrix/matrix_la.h: In function ‘long int dlib::svd4(dlib::svd_u_mode, bool, const dlib::matrix_exp&, dlib::matrix&, dlib::matrix&, dlib::matrix&) [with EXP = dlib::matrix_op, dlib::row_major_layout> > > > >; long int qN = 1; long int qX = 1; long int uM = 1; long int uN = 1; long int vM = 2; long int vN = 1; MM1 = dlib::memory_manager_stateless_kernel_1; MM2 = dlib::memory_manager_stateless_kernel_1; MM3 = dlib::memory_manager_stateless_kernel_1; L1 = dlib::row_major_layout]’: /home/conan/w/prod/BuildSingleReference/.conan/data/dlib/19.19/_/_/build/2deb7304a91b7e1f00df151ebd797c9d6e7bafbe/dlib/filtering/../matrix/matrix_la.h:225:32: warning: iteration 1 invokes undefined behavior [-Waggressive-loop-optimizations] y = abs(q(i)) + abs(e(i)); ~~~^~~~~~ /home/conan/w/prod/BuildSingleReference/.conan/data/dlib/19.19/_/_/build/2deb7304a91b7e1f00df151ebd797c9d6e7bafbe/dlib/filtering/../matrix/matrix_la.h:163:20: note: within this loop for (i=0; i