linker-errors | 易学教程

Cuda C - Linker error - undefined reference

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I am having a hard time compiling a simple cuda program consiting of only two files. The main.c looks like this: #include "my_cuda.h" int main(int argc, char** argv){ dummy_gpu(); } The cuda.h looks like this: #ifndef MY_DUMMY #define MY_DUMMY void dummy_gpu(); #endif And the my_cuda.cu file loos like this: #include <cuda_runtime.h> #include "my_cuda.h" __global__ void dummy_gpu_kernel(){ //do something } void dummy_gpu(){ dummy_gpu_kernel<<<128,128>>>(); } However if I compile I allways receive the following error: gcc -I/usr/local/cuda/5.0.35/include/ -c main.c nvcc -c my_cuda.cu gcc -L/usr

How do I specify, which version of boost library to link to?

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问题 I'm trying to migrate a project written in VS2012 to VS2013. I successfully compiled boost 1.53.0 (I first tried 1.54.0, but got some compiler errors) and got libraries like libboost_filesystem-vc120-mt-1_53.lib . But when trying to build my project, the linker complains: error LNK1104: cannot open file 'libboost_filesystem-vc110-mt-1_53.lib' I've been looking for some project settings in my entire solution to find out, why it's trying to load the older library version, but I didn't find

Using pthread in c++

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问题 I am using pthread.h in a *.cc file. when I try to use pthread_exit(0); or pthread_join(mythrds[yy],NULL); it says: .cc:(.text+0x3e): undefined reference to `pthread_exit' when complied very similar code in a *.c file with gcc it work perfect. How Can I use pthread's in c++.. (I also added -lpthread) .. void *myThreads ( void *ptr ) { ... pthread_exit(0); } .. flags: g++ -lpthread -Wall -static -W -O9 -funroll-all-loops -finline -ffast-math 回答1: You might try using the -pthread option to g++.

Linking files in g++

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问题 Recently I have tried to compile a program in g++ (on Ubuntu). Usually i use Dev-C++ (on Windows) and it works fine there as long as I make a project and put all the necessary files in there. The error that occurs when compiling the program is: $filename.cpp: undefined reference to '[Class]::[Class Member Function]' The files used are as following: The source code (.cpp) file with the main function. The header file with the function prototypes. The .cpp file with the definitions for each

Inline function “undefined symbols” error

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问题 I want to write an inline function, but I get an error. How can I fix it? Error information: Undefined symbols for architecture i386: "_XYInRect", referenced from: -[BeginAnimation ccTouchesEnded:withEvent:] in BeginAnimation.o ld: symbol(s) not found for architecture i386 clang: error: linker command failed with exit code 1 (use -v to see invocation) Code: CGPoint location = CGPointMake(60, 350); if (XYInRect(location, 53, 338, 263, 369)) { } inline BOOL XYInRect(CGPoint location, float MixX

Calling C++ method from Objective C

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问题 I have the following files. foo.h (C++ header file) foo.mm (C++ file) test_viewcontroller.h (objective c header file) test_viewcontroller.m (Objective c file) I have declared a method donothing() in foo.h and defined it in foo.mm.Lets say it is double donothing(double a) { return a; } Now,I try to call this function in test_viewcontroller.m double var = donothing(somevar); I get linker error which says "cannot find symbols" _donothing() in test_viewcontroller.o collect2: ld returned 1 exit

STD linker error with Apple LLVM 4.1

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问题 I've got a large static library in C++ with bits of Objective-C originally built for iOS (armv7). I built a OS X (64-bit Intel x86_64) version of it, but as soon as I tried to use it in a OS X app project (targeted to Lion 10.7), tens of linker errors appeared, most of them about standard library symbols. I know how to solve "my" linker problems, but the STD ones copied below are bugging me. "std::basic_filebuf<char, std::char_traits<char> >::is_open() const" "std::basic_stringbuf<char, std:

Link error while building a unit test target

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问题 I have a XCode4 / iOS project with a regular target and unit test target. Everything works fine, except when I try to #import one of my classes in my test class and try to use it. If I try to build the unit test target, I get the following link error: Undefined symbols for architecture i386: "_OBJC_CLASS_$_FRRCategory", referenced from: objc-class-ref in CategoryTests.o ld: symbol(s) not found for architecture i386 collect2: ld returned 1 exit status In CategoryTests.m I'm importing the

dyld: Symbol not found: error how to resolve this issue

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问题 I have the following code (given below) where I am using NSURLConnection for connecting and parsing the response string. But I am getting the following error: dyld: Symbol not found: _CFXMLNodeGetInfoPtr Referenced from: /System/Library/Frameworks/Security.framework/Versions/A/Security Expected in: /Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator4.3.sdk/System/Library/Frameworks/CoreFoundation.framework/CoreFoundation in /System/Library/Frameworks/Security

Multiple definition of inline functions when linking static libs

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问题 I have a C++ program that I compile with mingw (gcc for Windows). Using the TDM release of mingw which includes gcc 4.4.1. The executable links to two static library (.a) files: On of them is a third-party library written in C; the other is a C++ library, written by me, that uses the C library provides my own C++ API on top. An (in my view, excessive) portion of the C library's functionality is implemented in inline functions. You can't avoid including the inline functions when you use the C