I am getting the following error when compiling opencv with ffmpeg.
..../arm-none-linux-gnueabi/bin/ld: ../../bin/opencv_test_core: hidden symbol `__sync_val_compare_and_swap_4' in ..../arm-none-linux-gnueabi/bin/ld: final link failed: Nonrepresentable section on output
collect2: ld returned 1 exit status
I have no idea what this means. How do I fix this?
Edit:
I am cross compiling for ARM using codesourcery's arm-2009q3 compiler.
I using cmake and make to compile.
Please check all the libraries that you use and go through this stackoverflow thread as well.
To me, I got the below error when I migrated my product to new GCC version (3.3.3 to 4.5.4)
hidden symbol `__clz_tab' in /../lib/gcc/mipsel-unknown-linux-uclibc/4.5.4/libgcc.a(_clz.o) is referenced by DSO
Later I found that one of the library that I tried to link was built using GCC 3.3.3. After building the other library under GCC 4.5.4, the 'hidden symbol' error disappeared.
Related
I am working on a project that was previously done and uploaded on app store.When I run this app in Xcode 5.0 it is working fine but when I run this on Xcode Version 5.1.1 (5B1008) I am getting Linker error on both device and simulator.
Error Message- Library not found for -llib. (clang: error: linker command failed with exit code 1 (use -v to see invocation)).
I have searched a lot but I didn't get any thread about Library not found for -llib error. Is there anything I have to change in build settings to resolve this?
Look at the linker command line in detail for the -L options being used:
Then use Terminal or Finder to see if your libXXX.a file exists in those directories. If the library exists elsewhere then you need to configure your Library Search Paths:
However there several details which you have not provided in your question when using a library within an app:
Is the library built as part of the Xcode project/workspace (as in the first image)?
Is the library supplied by a third-party with binary (.a) and header files (as in the second image)?
TL;DR: I ran make in the wrong directory so the paths were messed up.
Problem:
>make
linking ../build/release/yubikey-personalization-gui
/usr/x86_64-suse-linux/bin/ld: cannot find -llib
...
I ran into this when compiling the Yubikey Personalisation Tool. I tracked down the -llib call in my Makefile which looked like this:
...
LINK = #echo linking $# && g++
...
LIBS = $(SUBLIBS) -L/usr/lib64 -L../lib/release -llib -lyubikey -lykpers-1 -lQtGui -L/usr/lib64 -L/usr/X11R6/lib -lQtCore -lpthread
...
$(LINK) $(LFLAGS) -o $(TARGET) $(OBJECTS) $(OBJCOMP) $(LIBS)
So it was setting a variable called LINK which would print "linking" and then call g++, which is the compiler.
Then it set the var LIBS which would hold the ominous -llib.
Then it composes and runs the command $(LINK) ... $(LIBS).
Which runs g++ with the parameter -llib.
And what does that do? Turns out -l<something> is telling the compiler to use the something-library. So it asks for the library called lib here. Which is strangely generic. I figured out that the sources came with a directory called lib/, which was at ../lib.
So starting make from a directory higher up fixed it.
You should remove libstdc++ from other linker flags in your xcode project
https://stackoverflow.com/a/53103383/1344237
I have a question that is probably trivial, but I can't see the solution now. I have a .cpp file that I would like to run through MonoDevelop. Unfortunately, instead of a small Bantumi simulation, I only get:
Building Solution: Bantumi (Debug)
Building: Bantumi (Debug)
Performing main compilation...
Precompiling headers
Compiling source to object files
Generating binary "Bantumi" from object files
g++ -o "/Users/myname/Projects/Bantumi/Bantumi/bin/Debug/Bantumi"
clang: error: no input files
Build complete -- 1 error, 0 warnings
---------------------- Done ----------------------
Build: 1 error, 0 warnings
From what I found, most people had this problem when there was no such file in the current directory, or the compiler did not have a valid address. However, my file is exactly where the compiler looks for it, but it still produces an error. Do you know what else could lead to this error message?
Thanks a lot! If this type of question has already been solved, you can just send me a link to it.
Following this link. I am stuck in the last two steps during setting up my workstation.
As a compiler I use Code:Block MinGW; I have already generated the compiled opencv files, now I need to build the sln file in Windows. I use Code Block to build this OpenCV Project File in the path D:\OpenCV\Build\Opencv, where I put the generated bin file after using Cmake.
During the building, it stopped at 40%, saying;
Linking CXX executable ....\bin\opencv_perf_core.exe
c:/codeblock/codeblocks/mingw/bin/../lib/gcc/mingw32/4.4.1/../../../../mingw32/bin/ld.exe:
warning: auto-importing has been activated without
--enable-auto-import specified on the command line. This should work unless it involves constant data structures referencing symbols from
auto-imported DLLs. Cannot export _ZN12_GLOBAL__N_13ROp3allEv: symbol
not found Cannot export _ZN12_GLOBAL__N_17CmpType3allEv: symbol not
found collect2: ld returned 1 exit status mingw32-make.exe[2]: *
[bin/opencv_perf_core.exe] Error 1 mingw32-make.exe1: *
[modules/core/CMakeFiles/opencv_perf_core.dir/all] Error 2
mingw32-make.exe: * [all] Error 2 Info: resolving vtable for
cv::_OutputArray by linking to imp_ZTVN2cv12_OutputArrayE
(auto-import) Info: resolving vtable for cv::_InputArray by linking to
imp_ZTVN2cv11_InputArrayE (auto-import) Info: resolving vtable for cv::Exception by linking to imp_ZTVN2cv9ExceptionE (auto-import)
Creating library file: ....\bin\libopencv_perf_core.dll.a Process
terminated with status 2 (14 minutes, 29 seconds) 0 errors, 3 warnings
How can I solve this problem?
Unfortunately, there's not much you can do, according to http://code.opencv.org/issues/2523.
You will have to use a recent version of MinGW. It builds fine using the latest MinGW shipping with GCC 4.7.2.
This issue seems to have been introduced in OpenCV 2.4.3 as it is said version 2.4.2 builds fine.
If this is not out of place here, would like to know about the source and fix for an error I get when I am building OpenCV under Cygwin (On Windows 7 64 bit).
I have Cygwin installed with MingW- pthread pacgae installed in that cygwin installation.
I have downloaded OpenCV ver. 2.3.1 source package.
EDIT:
After some tweaks, and changes to build process OpenCV builds fine now.
But when I compile a simple test openCV code(C source code), as below it gives lot of linker errors of undefined references to many basic openCV functions. I tried setting LD_LIBRARY_PATH correctly but still errors persit:
cc -L/usr/local/lib -I/usr/local/include/opencv2 -/usr/local/include/opencv -lop encv_imgproc -lopencv_highgui -lopencv_video -lopencv_calib3d test1.c -o test_op encv
cc: unrecognized option '-/usr/local/include/opencv'
/tmp/ccfEqFK0.o:test1.c:(.text+0x9dd): undefined reference to `_cvFree_'
/tmp/ccfEqFK0.o:test1.c:(.text+0xa4e): undefined reference to `_cvFree_'
/tmp/ccfEqFK0.o:test1.c:(.text+0xb44): undefined reference to `_cvGetRows'
/tmp/ccfEqFK0.o:test1.c:(.text+0xb6f): undefined reference to `_cvGetCols'
/tmp/ccfEqFK0.o:test1.c:(.text+0xb82): undefined reference to `_cvReleaseMat'
/tmp/ccfEqFK0.o:test1.c:(.text+0xcd2): undefined reference to `_cvAddS'
/tmp/ccfEqFK0.o:test1.c:(.text+0x1137): undefined reference to `_cvRead'
/tmp/ccfEqFK0.o:test1.c:(.text+0x11e1): undefined reference to `_cvLoadImage'
/tmp/ccfEqFK0.o:test1.c:(.text+0x129d): undefined reference to `_cvCreateImage'
/tmp/ccfEqFK0.o:test1.c:(.text+0x12dd): undefined reference to `_cvResize'
/tmp/ccfEqFK0.o:test1.c:(.text+0x12f1): undefined reference to `_cvNamedWindow'
/tmp/ccfEqFK0.o:test1.c:(.text+0x1305): undefined reference to `_cvNamedWindow'
'
/tmp/ccfEqFK0.o:test1.c:(.text+0x13ad): undefined reference to `_cvDestroyWindow
... ... Many more undefined references.
'
collect2: ld returned 1 exit status
Makefile:10: recipe for target `test_opencv' failed
make: *** [test_opencv] Error 1
EDIT
Below message is still there, but it is not an error but a message during build process.
*Then while building OpenCV under cygwin, when I do make , it gives a error message
c++: unrecognized option '-pthread'
[ 36%] Building CXX object modules/highgui/CMakeFiles/opencv_highgui.dir/src/grfmt_sunras.o*
and for many other files i see the same error c++: unrecognized option '-pthread'
I would like to know if anyone has experience in building openCV under Cygwin , how to get OpenCV going under cygwin? . Now I know there is windows setup for OpenCV but that is not what is an option to me.
Your cmd line arguments has a few problems. It seems that it was not fully pasted in your question (some indentation problems suggests so).
One obvious mistake can be easily identified since CC is telling you about it: cc: unrecognized option '-/usr/local/include/opencv':
When adding headers directories in the command line, you must specify each of them with -I. Notice how you failed to do so with: -/usr/local/include/opencv. It should be -I/usr/local/include/opencv
You also seem to be missing -lopencv_core in the cmd-line
In the future, use pkg-config (if its properly configured) to help you include opencv headers and libraries:
cc test.c -o test_op `pkg-config --cflags --libs opencv` -lop
Thanks for pointers:
What I found was the problem was as follows:
In my Makefile of my openCV test app I was linking with the import libraries (*.a). Which was the problem.
Problematic Makefile was linking against files
-l:/usr/local/lib/libopencv_core.dll.a ...etc...
I changed that to link with actual dll libs, then it worked(linked) fine, w/o any errors as above.
Changes Makefile looks:
LIBS = -l:/usr/local/bin/cygopencv_core-2.3.dll -l:/usr/local/bin/cygopencv_imgproc-2.3.dll -l:/usr/local/bin/cygopencv_highgui-2.3.dll -l:/usr/local/bin/cygopencv_video-2.3.dll -l:/usr/local/bin/cygopencv_calib3d-2.3.dll
I have been coding in python before and included the library of openCV without any problem. Now, I want to code in C++ so I downloaded eclipse and openCV libraries and included their path in the includes from eclipse ..
I have simple example of openCV and I am trying to run it, but I get this error -->
**** Build of configuration Debug for project Example ****
make all
Building file: ../Test.cpp
Invoking: GCC C++ Compiler
g++ -I/usr/local/include/opencv -O0 -g3 -Wall -c -fmessage-length=0 -MMD -MP -MF"Test.d" -MT"Test.d" -o "Test.o" "../Test.cpp"
Finished building: ../Test.cpp
Building target: Example
Invoking: GCC C++ Linker
g++ -o "Example" ./Test.o
/usr/lib/x86_64-linux-gnu/gcc/x86_64-linux-gnu/4.5.2/../../../crt1.o: In function _start':
(.text+0x20): undefined reference tomain'
./Test.o: In function gh::main()':
/home/shamma/workspace/Example/Debug/../Test.cpp:16: undefined reference tocvCreateImage'
/home/shamma/workspace/Example/Debug/../Test.cpp:21: undefined reference to cvNamedWindow'
/home/shamma/workspace/Example/Debug/../Test.cpp:22: undefined reference tocvShowImage'
/home/shamma/workspace/Example/Debug/../Test.cpp:23: undefined reference to cvWaitKey'
/home/shamma/workspace/Example/Debug/../Test.cpp:24: undefined reference tocvDestroyWindow'
/home/shamma/workspace/Example/Debug/../Test.cpp:25: undefined reference to `cvReleaseImage'
collect2: ld returned 1 exit status
make: * [Example] Error 1enter code here
any idea what might be the cause of the problem, I have tried lots of things without use
thanks in advance
It seems you have not properly configured OpenCV libraries. I recommend you to follow the OpenCV tutorial to start using it with Eclipse.
In eclipse go to project->properties->settings and under GCC C++ linker-> libraries and assuming you're just testing, add "opencv_core" and "opencv_highgui" there are many more and for each library you need to manually include them so that eclipse can tell the compiler to link these libraries when you run your program.
Also as a note generally "cvE______" is opencv for C where as for C++ it would be cv::E____ , its really confusing that sometime you can get away with both, but not always, so stick the the function in the namespace without cv prefixes.