c++ thread runtime error relocating (symbol not found)
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Hello!
I'm trying to use the thread library from the c++11 std library (#include <thread>) . I am cross compiling on my linux machine which compiles fine with no errors or warnings. Once I transfer it to the Omega2+ (0.2.2 b200), I immediately get a runtime error. Using the ldd command I get this from the cross compiled version:
root@Omega-####:~/# ldd thread_test_01_CC_OO /lib/ld-musl-mipsel-sf.so.1 (0x55a9e000) libstdc++.so.6 => /usr/lib/libstdc++.so.6 (0x77598000) libgcc_s.so.1 => /lib/libgcc_s.so.1 (0x77574000) libc.so => /lib/ld-musl-mipsel-sf.so.1 (0x55a9e000) Error relocating thread_test_01_CC_OO: _ZNSt6thread6_StateD2Ev: symbol not found Error relocating thread_test_01_CC_OO: _ZNSt6thread15_M_start_threadESt10unique_ptrINS_6_StateESt14default_deleteIS1_EEPFvvE: symbol not found Error relocating thread_test_01_CC_OO: _ZTINSt6thread6_StateE: symbol not found Error relocating thread_test_01_CC_OO: _ZTINSt6thread6_StateE: symbol not found Error relocating thread_test_01_CC_OO: _ZTINSt6thread6_StateE: symbol not found Error relocating thread_test_01_CC_OO: _ZTINSt6thread6_StateE: symbol not foundHowever, if I compile this code directly on the Omega, the code works completely fine, running the same command (ldd) as above lists the same dependencies except without any errors. I've checked my library versions as best I can, I've even started to copy the libraries from the Omega into my cross-compile staging directory but get the same results. Can anyone point me in the direction of how to solve this issue? Thank you!
// CPP program to demonstrate multithreading // using three different callables. #include <iostream> #include <thread> using namespace std; // A dummy function void foo(int Z) { for (int i = 0; i < Z; i++) { cout << "Thread using function" " pointer as callable\n"; } } // A callable object class thread_obj { public: void operator()(int x) { for (int i = 0; i < x; i++) cout << "Thread using function" " object as callable\n"; } }; int main() { cout << "Threads 1 and 2 and 3 " "operating independently" << endl; // This thread is launched by using // function pointer as callable thread th1(foo, 3); // This thread is launched by using // function object as callable thread th2(thread_obj(), 3); // Define a Lambda Expression auto f = [](int x) { for (int i = 0; i < x; i++) cout << "Thread using lambda" " expression as callable\n"; }; // This thread is launched by using // lamda expression as callable thread th3(f, 3); // Wait for the threads to finish // Wait for thread t1 to finish th1.join(); // Wait for thread t2 to finish th2.join(); // Wait for thread t3 to finish th3.join(); return 0; }
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@OSO-Bear my guess would be that you are using dynamic linking and have a version mismatch in your libraries. Try statically linking and if this is successfully take a look at the versions you are compiling and and running against.