Thats really strange. To fix it just don't use DEBUG=1 in the Makefile. Is the only way to get around this issue either using OpenCV2 with C Source: opencv/opencv I had OpenCV version 2.4.12 running fine on my computer. If you are using your graphics card, please try it again because I added a missing file to the CMakeLists.txt. Any ideas? You need to add a reference to the SDL library. - Raspberry Pi Stack Exchange Log in Sign up Raspberry Pi Stack Exchange is a question and answer site for users and developers of hardware and software for Raspberry Pi. Also you have created a Windows application instead of a console app. c++error: undefined reference to `xxx' 1. 2.extern,externextern a.h: //a.h #ifndef. All these undefined references are declared and defined inside the "vdo_slam" package. CMakeFiles/darknet_ros.dir//darknet/src/image.c.o:image.c:(.text+0x660): more undefined references to `cvRound' follow make: *** [all] Error 2, maybe the following links can help you: bleepcoder.com uses publicly licensed GitHub information to provide developers around the world with solutions to their problems. It also contains many helpful project templates that simplify the process of creating a new application as illustrated in the images that Sam has posted . By default this place is: /usr/local/lib Then in Libraries (-l) add the OpenCV libraries that you may need. Well occasionally send you account related emails. https://stackoverflow.com/questions/42918747/yolo-c-compilation-failure-with-debug-1/46808785#46808785 Are you trying to compile darknet_ros with or without cuda (using GPU)? I just tried building in ubuntu 22.04 using: This builds OpenCV 3.4 from source, and PS Move API successfully links against it. By clicking Sign up for GitHub, you agree to our terms of service and /opt/ros/kinetic/include/opencv-3.2.0-dev/opencv2/core/types_c.h: In function cvPointFrom32f: 5 comments Contributor ChristophHaag commented on Aug 15, 2016 make[2]: *** [/media/sdcard/catkin_ws/devel/lib/darknet_ros/darknet_ros] Error 1 Sign in undefined reference to `cvRound' in examples & tests with -DPSMOVE_USE_DEBUG=1 - Thp/Psmoveapi undefined reference to `cvRound' in examples & tests with -DPSMOVE_USE_DEBUG=1 This issue has been tracked since 2016-08-15. privacy statement. [ 49%] Building C object darknet_ros/darknet_ros/CMakeFiles/darknet_ros.dir/src/image_interface.c.o I had rerun cmake but I sill have undefined reference even if with this CMakeList. Modify the head in the MakeFile , set all flags to 1. cuDNN7.1 Then, when all the necessary source have been compiled, you can issue the command $ ifort *.o -o myexe or something similar. This can be the most straightforward reason for this error, that you have provided the prototype of the function but forgot to give its definition. I added the following line to the CMakeLists.txt: add_definitions(-O4 -g) Now, it should compile. Well occasionally send you account related emails. You signed in with another tab or window. C API doesn't work anymore if building without optimizations #10246 Closed AlexeyAB mentioned this issue on Mar 16, 2018 make error undefined reference to `cvRound' AlexeyAB/darknet#469 Closed Sign up for free to join this conversation on GitHub . Please look at this github that explains how to use ChatScript as a library inside a C/C++ program (only see Embedding step1 and 2): [ ^] As the tutorial says, I must do 2 calls. Already on GitHub? or use OpenCV3 with C++? https://groups.google.com/forum/#!topic/darknet/fQ2GQuibBA4, /darknet_ros/detection_image only viewable if BOTH enable_opencv=true and Xserver is running, Segmentation fault running darkner_ros_gdb.launch. Installed Opencv using the tutorial on opencv.org except have not set the cmake parameters; instead just ran cmake .. The only problem I have is at the end of "catkin_build" I get several of these "undefined reference to .." as shown below. ipt.x = cvRound(point.x); Hi, please can you tell me which of that are deprecated?? Using openv 3.3 on Ubuntu 16.04. I was looking for a C processing image library and find out that OpenCV library was the most convenient (According to people advices). Or put into another header? so it's not critical for debugging, but still annoying. [ 50%] Linking CXX executable /media/sdcard/catkin_ws/devel/lib/darknet_ros/darknet_ros please show us your cmdline (you're probably not linking something) unfortunately this is using opencv's deprecated c-api. Well occasionally send you account related emails. you also got 2 add_executable lines there, bad ! /opt/ros/kinetic/include/opencv-3.2.0-dev/opencv2/core/types_c.h:929:13: warning: implicit declaration of function cvRound [-Wimplicit-function-declaration] Sign up for a free GitHub account to open an issue and contact its maintainers and the community. Apparently it has something to do with opencv 2 vs opencv 3. See opencv/opencv#6076, opencv/opencv#6585. This issue has been tracked since 2016-08-15. CMakeFiles/Makefile2:2796: recipe for target 'darknet_ros/darknet_ros/CMakeFiles/darknet_ros.dir/all' failed Is the only way to get around this issue either using OpenCV2 with C or use OpenCV3 with C++? from /media/sdcard/catkin_ws/src/darknet_ros/darknet/src/network.h:5, There is no support for direct C compilation, it doesn't work (crash sometimes, see cvGetSize (#6221) problem). How to fix GCC lots of undefined reference to std:: functions Problem: When trying to compile your C++ application, you see lots of undefined reference to messages like Examples: opencv_core, opencv_imgproc, opencv_highgui. Boost thread error: undefined reference c++ boost boost-thread 56,483 Solution 1 compile with mt tag i.e -lboost_thread-mt Solution 2 I had the same question, but -lboost_thread-mt is now deprecated see this answer on askubuntu.com. These errors are usually partly identified by the linker error messages, but a programmer still needs to manually investigate the code, build system or linked libraries. Thanks. I have tried several solutions as listed below. I have opencv 3.1.0 here on Archlinux. Despite being not defined in types_c.h its still being called in types_c.h, core_c.h and imgproc_c.h without any reference to fast_math.hpp CMakeFiles/darknet_ros.dir//darknet/src/convolutional_layer.c.o: In function cvPointFrom32f': convolutional_layer.c:(.text+0x660): undefined reference to cvRound' ^ convolutional_layer.c:(.text+0x14b8): undefined reference to cvRound' convolutional_layer.c:(.text+0x14d0): undefined reference to cvRound' Have a question about this project? why the update to OpenCV 3 has been made for PS Move API. Also OpenCV C API is candidate for removal. You haven't included what. CvRound function has bee defines in types_c.h in opencv2 whereas in opencv3 its not been defined in types_c.h but in core/fast_math.hpp. darknet_ros/darknet_ros/CMakeFiles/darknet_ros.dir/build.make:1957: recipe for target '/media/sdcard/catkin_ws/devel/lib/darknet_ros/darknet_ros' failed Already have an account? Use DEBUG=0 or change these lines in the Makefile: https://github.com/AlexeyAB/darknet/blob/2f52cfeb07e11fce8275496164293cf30b732907/Makefile#L47-L49 By clicking Sign up for GitHub, you agree to our terms of service and Sign in from /opt/ros/kinetic/include/opencv-3.2.0-dev/opencv2/highgui/highgui_c.h:45, you also have to run cmake again. You signed in with another tab or window. make[1]: *** [darknet_ros/darknet_ros/CMakeFiles/darknet_ros.dir/all] Error 2 This way you are reserving some space for that variable Share Improve this answer Follow edited Feb 7, 2017 at 13:51 answered Feb 7, 2017 at 13:10 frarugi87 2,690 9 19 Sign in to comment Assignees No one assigned Labels duplicate wontfix from /media/sdcard/catkin_ws/src/darknet_ros/darknet/src/image.h:13, sorry,i do not know the location of compile log.I did what you sugget and here are the new errors::-1: error: main.o: undefined reference to symbol '_ZN2cv6String10deallocateEv' CUDA9.1 [100%] Linking CXX executable /media/sdcard/catkin_ws/devel/lib/darknet_ros/darknet_ros Is the only way to get around this issue either using OpenCV2 with C I'm trying to compile a very simple project divided in a .cu file and a .c file to make a test because I need to do something like that for a bigger job. Despite being not defined in types_c.h its still being called in types_c.h, core_c.h and imgproc_c.h without any reference to fast_math.hpp. The affected test application has been removed in 2016 already: #277. Modify -gencode arch for GTX1080. CMakeFiles/darknet_ros.dir//darknet/src/deconvolutional_layer.c.o:deconvolutional_layer.c:(.text+0x660): more undefined references to cvRound' follow CMakeFiles/darknet_ros.dir/__/darknet/src/deconvolutional_layer.c.o: In function make_deconvolutional_layer': First in Library search path (-L) you have to write the path to where the opencv libraries reside. Kindly, look into this issue and get it resolved as early as possible. So there is no place in memory where b actually resides (the reference is undefined). This source says "If you see errors from catkin_make that the header ros/ros.h cannot be found, or "undefined reference" errors on ros::init or other ROS functions, the most likely reason is that your CMakeLists.txt does not correctly declare a dependency on roscpp." I can't figure out what I'm missing. The text was updated successfully, but these errors were encountered: Has OpenCV 3 removed those functions? Undefined Reference to cv:: edit undefined_references asked Sep 21 '17 Intoxica 1 1 1 2 updated Sep 22 '17 I am getting undefined references to cv::. 0 Kudos Copy link Share Reply jdbaba Beginner 05-12-2012 12:18 PM 2,791 Views Hi meceej4, CMakeFiles/darknet_ros.dir//darknet/src/lsd.c.o: In function cvPointFrom32f': lsd.c:(.text+0x660): undefined reference to cvRound' image_interface.c:(.text+0x1214): undefined reference to cvRound' CMakeFiles/darknet_ros.dir/src/image_interface.c.o: In function cvEllipseBox': /opt/ros/kinetic/include/opencv-3.2.0-dev/opencv2/core/types_c.h:929:13: warning: implicit declaration of function cvRound [-Wimplicit-function-declaration] The code should be compatible with OpenCV 3.2. make[2]: *** [/media/sdcard/catkin_ws/devel/lib/darknet_ros/darknet_ros] Error 1 Codesti | Contact. @aha_1980 said in opencv error: undefined reference to `cv::VideoCapture::VideoCapture()': compile log. Is the only way to get around this issue either using OpenCV2 with C or use OpenCV3 with C++? to these: This is old known bug of C API in the OpenCV 3.x: https://github.com/opencv/opencv/issues/8658. Sign up for a free GitHub account to open an issue and contact its maintainers and the community. berak (Jun 8 '18) edit. Apparently it has something to do with opencv 2 vs opencv 3. If you want the compiler to compile Fortran source into object code but refrain from linking, you should use the -c compiler flag. document.write(new Date().getFullYear()); 2-performChat () function to pass a string to library and get the output string as the . Already on GitHub? to your account. Create an account or sign in to comment. All rights belong to their respective owners. Neither -compatibleArrayDims nor -largeArrayDims is selected. lsd.c:(.text+0x14b8): undefined reference to cvRound' lsd.c:(.text+0x14d0): undefined reference to cvRound' CvRound function has bee defines in types_c.h in opencv2 whereas in opencv3 its not been defined in types_c.h but in core/fast_math.hpp. The error occurs in the official darknet code. In the future, MATLAB will require the use of -largeArrayDims and remove the -compatibleArrayDims option. ^ The text was updated successfully, but these errors were encountered: OpenCV is C++ library. In our case, we want add opencv_videoio (it's a cpp lib). CMakeFiles/darknet_ros.dir/src/image_interface.c.o: In function cvPointFrom32f': image_interface.c:(.text+0x660): undefined reference to cvRound' bots. to your account. But it doesnt work I don't know why. why the update to OpenCV 3 has been made for PS Move API. in c++ undefined reference is the kind of error which has occurred from when we have to create an object reference of any types like class, functions, variables, enumeration after creating that it will be used wherever it requires the linker will not find its definitions but it can be used to search the referenced objects including both files and sticked to 2.x undefined reference to `cvRound' in examples & tests with -DPSMOVE_USE_DEBUG=1. The basic syntax for the typedef keyword is the following: typedef data_type_name alias. 1. so it's not critical for debugging, but still annoying. The typedef keyword allows for the creation of alias for data types, which can be used, for example, to replace a complex type name. Sign up to join this community Anybody can ask a question /opt/ros/kinetic/include/opencv-3.2.0-dev/opencv2/core/types_c.h: In function cvPointFrom32f: You signed in with another tab or window. For more information: undefined reference to `cvRound' in examples & tests with -DPSMOVE_USE_DEBUG=1 thp/psmoveapi#251 Open suryaprakaz commented on Jan 27, 2017 Sign up for free to join this conversation on GitHub . from /media/sdcard/catkin_ws/src/darknet_ros/darknet/src/network.h:5, 3 comments praneethsusarla commented on Mar 22, 2017 edited OpenCV => 3.2 Operating System / Platform => linux Ubuntu 16.04 64 Bit Compiler => gcc on Mar 22, 2017 alalek added duplicate wontfix labels on Mar 23, 2017 I am trying to build darknet_ros under Ubuntu16.06 with OpenCV 3.2 and I met this error:: [ 49%] Building CXX object darknet_ros/darknet_ros/CMakeFiles/darknet_ros.dir/src/object_detector_demo.cpp.o Then the fix is to link both the object file from foo.c and undefined_reference.c, or to compile both the source files: Here you go the code: main.c void cmal(); int main() { cmal(); return 0; } cmal.cu #define SIZE 10 #include <stdio.h> // Kernel definition global void vecAdd(float* A, float* B, float* C . collect2: error: ld returned 1 exit status Already have an account? Source: AlexeyAB/darknet Hi, My system: Ubuntu16.04 CUDA9.1 cuDNN7.1 opencv3.3.1 Modify the head in the MakeFile , set all flags to 1. zhenkaiwang commented on November 2, 2022 Undefined Reference to cvRound when compiling with OpenCV 3. from darknet_ros. Now this code will compile. I passed from gcc version 2.92 to 3.2. In file included from /opt/ros/kinetic/include/opencv-3.2.0-dev/opencv2/core/core_c.h:48:0, Well, it looks as if that is the case. convolutional_layer.c:(.text+0x1214): undefined reference to cvRound' CMakeFiles/darknet_ros.dir/__/darknet/src/convolutional_layer.c.o: In function cvEllipseBox': from /opt/ros/kinetic/include/opencv-3.2.0-dev/opencv2/highgui/highgui_c.h:45, Sign in We do not host any of the videos or images on our servers. I have opencv 3.1.0 here on Archlinux. opencv3.3.1. The affected test application has been removed in 2016 already: #277, Copyright image_interface.c:(.text+0x14b8): undefined reference to cvRound' image_interface.c:(.text+0x14d0): undefined reference to cvRound' or use OpenCV3 with C++? make[1]: *** [darknet_ros/darknet_ros/CMakeFiles/darknet_ros.dir/all] Error 2 In file included from /opt/ros/kinetic/include/opencv-3.2.0-dev/opencv2/core/core_c.h:48:0, We are not affiliated with GitHub, Inc. or with any developers who use GitHub for their projects. to your account. To be honest my machine (Mandrake 9.0 - gcc 3.2 - Root 2.10) it's in a mess in the week end i'll try to cleanup it and install Linux from the start using a Mandrake 9.2 (the same for recent version of gcc and Root). ipt.x = cvRound(point.x); [http://stackoverflow.com/questions/42918747/yolo-c-compilation-failure-with-debug-1], The reason for calling it as a bug is as follows: Or put into another header? I just tried building in ubuntu 22.04 using: This builds OpenCV 3.4 from source, and PS Move API successfully links against it. CMakeFiles/Makefile2:2796: recipe for target 'darknet_ros/darknet_ros/CMakeFiles/darknet_ros.dir/all' failed deconvolutional_layer.c:(.text+0x1b24): undefined reference to backward_deconvolutional_layer_gpu' deconvolutional_layer.c:(.text+0x1b28): undefined reference to backward_deconvolutional_layer_gpu' https://stackoverflow.com/questions/42918747/yolo-c-compilation-failure-with-debug-1/46808785#46808785, https://github.com/AlexeyAB/darknet/blob/2f52cfeb07e11fce8275496164293cf30b732907/Makefile#L47, https://github.com/opencv/opencv/issues/8658, YOLO is struggling to detect the nested objects, one more question about fine-tuning vs transfer-learning, where can I find the pretrained backbone without mish. Please have a look in the darknet google group to see how to fix this. To be honest, I do not even know If you are using your graphics card, please try it again because I added a missing file to the CMakeLists.txt. One way to fix this is to change your main () to. New to opencv and opensource environments. Yes, I am compiling with cuda 8.0 on Jetson TX2. Sign in to comment Assignees No one assigned Labels category: build/install question (invalid tracker) Milestone No milestone you are right Rene. Already on GitHub? Chat. Has OpenCV 3 removed those functions? The LLVM code that I have written and compiled in C++ works for me, so I suspect there is some environment variable or some configuration which llvm-sys requires to properly link with the LLVM libraries. Verbose Output of Make Hey guys! In my project CMakeList.txt I can find_package (vdo_slam REQUIRED) with no error. from /media/sdcard/catkin_ws/src/darknet_ros/darknet/src/regressor.c:1: https://groups.google.com/forum/#!topic/darknet/fQ2GQuibBA4. Well, it looks as if that is the case. So I decided to install the latest version, but when I tried to . berak (Jun 8 '18) edit. Resolve Undefined Reference to a Class::Function() Due to No Function Definition in C++. There are many implementations in C using CUDA and OpenCV and are popular. #include <windows.h> int WINAPI WinMain (HINSTANCE hInstance, HINSTANCE hPrevIns, LPSTR lpszArgument, int iShow) { // put your game code here } I have tried it again using new CMakeLists.txt. It only takes a minute to sign up. Sign up for a free GitHub account to open an issue and contact its maintainers and the community. InitSystem () function call to initialize the library. opencv/opencv#8438 and debugging Windows applications and is integrated with the Windows SDK (Software Development Kit) which contains many necessary headers, libraries and helpful tools. privacy statement. In function LED_GPIO_Config': main.c:. Instead what you now want in your makefile (at least for linux) is: -lpthread -lboost_thread . from /media/sdcard/catkin_ws/src/darknet_ros/darknet/src/image.h:13, image_interface.c:(.text+0x670): undefined reference to cvRound' CMakeFiles/darknet_ros.dir/src/image_interface.c.o: In function cvReadInt': The text was updated successfully, but these errors were encountered: The code should be compatible with OpenCV 3.2. Makefile:138: recipe for target 'all' failed Undefined reference to library functions Using Arduino Programming Questions sol_caliente February 7, 2022, 6:02am #1 I had to write a small library for a calculator in arduino, and I did, but woe is me I actually made a C++ library, not an arduino one, so I tried to port it to arduino the best I could. " undefined to XXX" linux C " undefined to XXX" C++ undefined to `cv' C++ undefined reference is a linker error that often may come up when the function is declared but not implemented. You haven't included what code you are trying to compile or what actions you did to get where you are so it is pretty hard to even wildly guess what is the problem. lsd.c:(.text+0x1214): undefined reference to cvRound' CMakeFiles/darknet_ros.dir/__/darknet/src/lsd.c.o: In function cvEllipseBox': privacy statement. pro tip: mark your code with mouse, and press ctrl-k here, to format it nicely. mex -v nlopt_optimize.c libnlopt-0.lib and got the error message Theme Copy Verbose mode is on. Should have eg: YOLO, Regarding to YOLO specially refer to answer https://stackoverflow.com/a/46808785/2953509, Undefined reference to cvRound in opencv 3.2. You need to be a member in order to leave a comment Try renaming your *.c source files to *.cpp.I suspect that due to C++ name mangling, and that the libraries are in C++, that the calls from your C code to the C++ library functions are failing.. As far as I remember, C has extreme difficulties calling C++ code, while C++ can call C code, provided that the C code is declared, to the C++ compiler, to be . I have tried including the "fast_math.hpp" path (#include core/fast_math.hpp) in types_c.h, core_c.h and imgproc_c.h but it didn't solve the issue. Modify -gencode arch for GTX1080. By clicking Sign up for GitHub, you agree to our terms of service and from /media/sdcard/catkin_ws/src/darknet_ros/darknet/src/detector.c:1: To be honest, I do not even know -- 2.1 2.2 2.3 2.4 2.5 2.3 2.4 2.5 "" 2022 CSDN CSDN I have tested with both LLVM 10.0.1 and LLVM 11 and the same errors occur on both. CMakeFiles/darknet_ros.dir//darknet/src/convolutional_layer.c.o:convolutional_layer.c:(.text+0x660): more undefined references to `cvRound' follow The declaration of the function is. collect2: error: ld returned 1 exit status deconvolutional_layer.c:(.text+0x1b18): undefined reference to forward_deconvolutional_layer_gpu' deconvolutional_layer.c:(.text+0x1b1c): undefined reference to forward_deconvolutional_layer_gpu' Bug OpenCV3.1 error ,when I tring to compile c project, Undefined Reference to cvRound when compiling with OpenCV 3, https://stackoverflow.com/a/46808785/2953509, Fix undefined reference to `cvRound' when using "C", Operating System / Platform => linux Ubuntu 16.04 64 Bit. See opencv/opencv#6076, opencv/opencv#6585. Have a question about this project? darknet_ros/darknet_ros/CMakeFiles/darknet_ros.dir/build.make:3384: recipe for target '/media/sdcard/catkin_ws/devel/lib/darknet_ros/darknet_ros' failed Are you trying to compile darknet_ros with or without cuda (using GPU)? errors. Comments (5) mbjelonic commented on November 2, 2022 17 . What about such implementations then ? make: *** [all] Error 2. Ubuntu16.04 Copy To deal with this, you have to manually declare it in a cpp file, with the syntax int A::b;. Hi, Darknet supports CUDA 9.1, cuDNN 7.1 and OpenCV any <= 3.4.0. About Press Copyright Contact us Creators Advertise Developers Terms Privacy Policy & Safety How YouTube works Test new features Press Copyright Contact us Creators . opencv - Undefined reference to raspicam::_private::Private_Impl [.] Using -compatibleArrayDims. lsd.c:(.text+0x670): undefined reference to cvRound' CMakeFiles/darknet_ros.dir/__/darknet/src/lsd.c.o: In function cvReadInt': Have a question about this project? deconvolutional_layer.c:(.text+0x1b30): undefined reference to update_deconvolutional_layer_gpu' deconvolutional_layer.c:(.text+0x1b34): undefined reference to update_deconvolutional_layer_gpu' or where can I find new one? My system: I added the following line to the CMakeLists.txt: @mbjelonic "add_definitions(-O4 -g)" made my day. You should compile your program as C++ to use OpenCV. But still got the same error [ 98%] Building C object darknet_ros/darknet_ros/CMakeFiles/darknet_ros.dir//darknet/src/regressor.c.o An alternative situation arises where the source for foo() is in a separate source file foo.c (and there's a header foo.h to declare foo() that is included in both foo.c and undefined_reference.c). The code is not compiling because of the following issue: I have asked a question related to this in stackoverflow and I got the response saying that, its a bug present in opencv3.2. I have recently installed opencv 3.2 in ubuntu 16.04 system and tried to run a C code using opencv library. Undefined Reference to cvRound when compiling with OpenCV 3. Makefile:138: recipe for target 'all' failed convolutional_layer.c:(.text+0x670): undefined reference to cvRound' CMakeFiles/darknet_ros.dir/__/darknet/src/convolutional_layer.c.o: In function cvReadInt': please try to avoid any of it, and instead use cv::Mat, cv::VideoCapture , cv::imshow (), etc. Here aes_state_t is a new alias for uint8_t*, which is a pointer to an unsigned byte.
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