Thread: Including a library

Hi,

This is literally my first time trying to add a library into my C/C++ program. The library I want to add is FreeType. Also, I'm using Windows 7, if that matters, and MinGW-64 bit compiler.

So far I have managed to get the include path correctly.

Code:

#include "jni.h"
#include <iostream>
#include <ft2build.h>
#include FT_FREETYPE_H


extern "C" JNIEXPORT void JNICALL Java_FreeType_enter(JNIEnv *env, jobject obj, jint integer)
{
    FT_Library  library;
    
    
    std::cout << "Hello world!" << std::endl;
}

I get the following code to compile correctly with this line:

Code:

g++ -Werror -Ilibs/jni/include -Ilibs/freetype/include -shared -o lib.dll FreeType.cpp

This code compiles successfully and the program executes properly.

My problem comes when I actually need to use FreeType functions. When I add this line of code to my 'enter'

Code:

FT_Init_FreeType( &library );

compiler gives me an error that reference to FT_Init_FreeType is undefined.

I have found this topic on stackoverflow freetype - C compiler error: Undefined reference to 'FT_Init_FreeType' - Stack Overflow, however it didn't help me much, as I tried many different combination of -L and -l parameters, and compiler kept saying that it cannot find the file specified.

Sorry if I posted in the wrong board, and thank you for your time in advance!

Find the directory the library file, libfreetype.a, is in. If it's in /a_directory/a_subdirectory, then your command line should probably look like

Code:

g++ -Werror -Ilibs/jni/include -Ilibs/freetype/include -shared -o lib.dll FreeType.cpp -L/a_directory/a_subdirectory -lfreetype