I'm trying to make a C++ wrapper for Unity3D in C# based in OpenCV but first of all I'm trying to make a .a static library in C++ in order to make the wrapper. (I don't know if I'm doing right this).
But my problem is on building a new static library with Xcode.
(PD: I'm asking this question because Google is full of "how to make a static library for iOS and that's not what I'm looking for).
I make: New -> Project -> Mac OSx Frameworks and Libraries -> Library (Static, STL framework).
Then I have my two files: .h and .cp
file1.cp:
#include <iostream> #include "/Users/rafaelruizmunoz/Documents/OpenCV_projects/OpenCVDebug/OpenCVDebug/mylib.h" using namespace std; using namespace cv; float* prueba_funcion(unsigned char* a, int cols, int rows) { Mat mat = Mat(rows, cols, CV_8U, a); float* o = giveMeMiddlePoints(mat); // this function gets called from the include return o; } file1.h
#ifndef file1_ #define file1_ /* The classes below are exported */ #pragma GCC visibility push(default) class file1 { public: float* prueba_funcion(unsigned char *, int, int); }; #pragma GCC visibility pop #endif I press Cmd + B to build the library and I try to make a new Command Line project (for testing), importing my libfile1.a and my header file1.h in the Command Line project:
main.cpp
#include <iostream> #include "/Users/rafaelruizmunoz/Desktop/file1.h" using namespace std; int main(int argc, const char * argv[]) { // insert code here... std::cout << "Hello, World!\n"; unsigned char data[9] = {3,3,3,1,9,1,2,2,2}; file1 f; float* q = f.prueba_funcion(data, 3, 3); cout << endl << q; return 0; } but I get linker errors (it's like if my static library was compiled in a wrong way):
Undefined symbols for architecture x86_64: "file1::prueba_funcion(unsigned char*, int, int)", referenced from: _main in main.o ld: symbol(s) not found for architecture x86_64 clang: error: linker command failed with exit code 1 (use -v to see invocation)
Do you know what I'm really doing bad?
Thank you in advance. Regards.
