DarkHelp
DarkHelp copied to clipboard
Published
1 year ago
•
stephanecharette
stephanecharette
'undefined reference to function' after -static compilation using make for DarkHelp project
OS: Ubuntu 18.04 LTS
Built DarkNet succesfully and can be used with './darknet'
Built DarkHelp using this and compiled 'example_project'.
I am trying to build a standalone executable "exe_static" to be used on linux systems, where I might not have the privileges to install dependencies.
Copied DarkHelp/build/src-lib/libdarkhelp.a and libdarknet.a to /usr/lib/
exe_static.cpp
#include <DarkHelp.hpp>
#include <typeinfo>
int main(int argc, char *argv[])
{
DarkHelp::Config cfg("model.cfg", "model.weights", "names.list");
cfg.enable_tiles = true;
cfg.combine_tile_predictions = true;
cfg.annotation_auto_hide_labels = false;
cfg.annotation_include_duration = false;
cfg.annotation_include_timestamp = false;
DarkHelp::NN nn(cfg);
const auto results = nn.predict(argv[1]);
// std::cout <<"Shape of result = : " << results.size() << "\n";
return 0;
}
CMakeLists.txt
CMAKE_MINIMUM_REQUIRED (VERSION 3.0)
PROJECT (ExampleProject C CXX)
SET (CMAKE_BUILD_TYPE Release)
SET (CMAKE_CXX_STANDARD 17)
SET (CMAKE_CXX_STANDARD_REQUIRED ON)
ADD_DEFINITIONS ("-Wall -Wextra -Werror -Wno-unused-parameter ")
FIND_PACKAGE (Threads REQUIRED)
FIND_PACKAGE (OpenCV REQUIRED)
#FIND_LIBRARY (DARKHELP libdarkhelp.a)
#FIND_LIBRARY (DARKNET libdarknet.a)
INCLUDE_DIRECTORIES (${OpenCV_INCLUDE_DIRS})
FILE (GLOB SOURCE *.cpp)
LIST (SORT SOURCE)
SET (BUILD_SHARED_LIBS=OFF)
SET (OPENCV_GENERATE_PKGCONFIG=YES)
ADD_EXECUTABLE (exe_static ${SOURCE})
SET_TARGET_PROPERTIES(exe_static PROPERTIES
LINK_SEARCH_START_STATIC ON
LINK_SEARCH_END_STATIC ON
)
set(CMAKE_FIND_LIBRARY_SUFFIXES ".a")
set(CMAKE_EXE_LINKER_FLAGS "-static-libgcc -static-libstdc++")
#TARGET_LINK_LIBRARIES (exe_static Threads::Threads ${DARKHELP} ${DARKNET} ${OpenCV_LIBS})
TARGET_LINK_LIBRARIES (exe_static Threads::Threads libdarknet.a libdarkhelp.a ${OpenCV_LIBS} )
Same file structure as DarkHelp/example_project
$> cd build $> cmake ..
-- The C compiler identification is GNU 7.5.0
-- The CXX compiler identification is GNU 7.5.0
-- Check for working C compiler: /usr/bin/cc
-- Check for working C compiler: /usr/bin/cc -- works
-- Detecting C compiler ABI info
-- Detecting C compiler ABI info - done
-- Detecting C compile features
-- Detecting C compile features - done
-- Check for working CXX compiler: /usr/bin/c++
-- Check for working CXX compiler: /usr/bin/c++ -- works
-- Detecting CXX compiler ABI info
-- Detecting CXX compiler ABI info - done
-- Detecting CXX compile features
-- Detecting CXX compile features - done
-- Looking for pthread.h
-- Looking for pthread.h - found
-- Looking for pthread_create
-- Looking for pthread_create - not found
-- 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 OpenCV: /usr/local (found version "3.4.4")
-- Configuring done
-- Generating done
-- Build files have been written to: /path/to/exe_static/build
$> make
Scanning dependencies of target exe_static
[ 50%] Building CXX object CMakeFiles/exe_static.dir/exe_static.cpp.o
[100%] Linking CXX executable exe_static
/usr/lib/gcc/x86_64-linux-gnu/7/../../../../lib/libdarkhelp.a(DarkHelpNN.cpp.o): In function `DarkHelp::NN::reset()':
DarkHelpNN.cpp:(.text+0x1ff8): undefined reference to `free_network'
/usr/lib/gcc/x86_64-linux-gnu/7/../../../../lib/libdarkhelp.a(DarkHelpNN.cpp.o): In function `DarkHelp::NN::predict_internal_darknet()':
DarkHelpNN.cpp:(.text+0x45ca): undefined reference to `make_image'
DarkHelpNN.cpp:(.text+0x4715): undefined reference to `network_predict'
DarkHelpNN.cpp:(.text+0x4761): undefined reference to `get_network_boxes'
DarkHelpNN.cpp:(.text+0x4b7e): undefined reference to `free_detections'
DarkHelpNN.cpp:(.text+0x4ba7): undefined reference to `free_image'
DarkHelpNN.cpp:(.text+0x5190): undefined reference to `do_nms_sort'
/usr/lib/gcc/x86_64-linux-gnu/7/../../../../lib/libdarkhelp.a(DarkHelpNN.cpp.o): In function `DarkHelp::NN::init()':
DarkHelpNN.cpp:(.text+0xaa81): undefined reference to `load_network_custom'
DarkHelpNN.cpp:(.text+0xaaa7): undefined reference to `calculate_binary_weights'
collect2: error: ld returned 1 exit status
CMakeFiles/exe_static.dir/build.make:139: recipe for target 'exe_static' failed
make[2]: *** [exe_static] Error 1
CMakeFiles/Makefile2:67: recipe for target 'CMakeFiles/exe_static.dir/all' failed
make[1]: *** [CMakeFiles/exe_static.dir/all] Error 2
Makefile:83: recipe for target 'all' failed
make: *** [all] Error 2
All of those functions are Darknet functions. So you're not linking correctly to Darknet. Or maybe you need to specify Darknet after DarkHelp when linking?
I realized that the linker may be throwing away some unused functions so I had tried this:
TARGET_LINK_LIBRARIES (exe_static libdarkhelp.a libdarknet.a ${OpenCV_LIBS} Threads::Threads )
But still similar error:
$> make
Scanning dependencies of target exe_static
[ 50%] Building CXX object CMakeFiles/exe_static.dir/exe_static.cpp.o
[100%] Linking CXX executable exe_static
/usr/lib/gcc/x86_64-linux-gnu/7/../../../../lib/libdarkhelp.a(DarkHelpNN.cpp.o): In function `DarkHelp::NN::init()':
DarkHelpNN.cpp:(.text+0xaa81): undefined reference to `load_network_custom'
DarkHelpNN.cpp:(.text+0xaaa7): undefined reference to `calculate_binary_weights'
/usr/lib/gcc/x86_64-linux-gnu/7/../../../x86_64-linux-gnu/libpthread.a(pthread_create.o): In function `allocate_stack':
/build/glibc-uZu3wS/glibc-2.27/nptl/allocatestack.c:526: undefined reference to `_dl_stack_flags'
/build/glibc-uZu3wS/glibc-2.27/nptl/allocatestack.c:652: undefined reference to `_dl_stack_flags'
/usr/lib/gcc/x86_64-linux-gnu/7/../../../x86_64-linux-gnu/libpthread.a(elision-lock.o): In function `do_set_elision_enable':
/build/glibc-uZu3wS/glibc-2.27/nptl/../sysdeps/unix/sysv/linux/x86/elision-conf.c:67: undefined reference to `_dl_x86_cpu_features'
/usr/lib/gcc/x86_64-linux-gnu/7/../../../x86_64-linux-gnu/libpthread.a(nptl-init.o): In function `__pthread_initialize_minimal_internal':
/build/glibc-uZu3wS/glibc-2.27/nptl/nptl-init.c:294: undefined reference to `_dl_cpuclock_offset'
/build/glibc-uZu3wS/glibc-2.27/nptl/nptl-init.c:429: undefined reference to `_dl_pagesize'
/build/glibc-uZu3wS/glibc-2.27/nptl/nptl-init.c:438: undefined reference to `_dl_pagesize'
/build/glibc-uZu3wS/glibc-2.27/nptl/nptl-init.c:454: undefined reference to `_dl_init_static_tls'
/build/glibc-uZu3wS/glibc-2.27/nptl/nptl-init.c:456: undefined reference to `_dl_wait_lookup_done'
/usr/lib/gcc/x86_64-linux-gnu/7/../../../x86_64-linux-gnu/libpthread.a(nptl-init.o): In function `__pthread_get_minstack':
/build/glibc-uZu3wS/glibc-2.27/nptl/nptl-init.c:475: undefined reference to `_dl_pagesize'
collect2: error: ld returned 1 exit status
CMakeFiles/exe_static.dir/build.make:139: recipe for target 'exe_static' failed
make[2]: *** [exe_static] Error 1
CMakeFiles/Makefile2:67: recipe for target 'CMakeFiles/exe_static.dir/all' failed
make[1]: *** [CMakeFiles/exe_static.dir/all] Error 2
Makefile:83: recipe for target 'all' failed
make: *** [all] Error 2