如何在Eclipse（Linux）中使用自己的C ++书面库？

Question

Hey guys I have a problem, I want to use my own library in another C++ program. I will describe what I do and then want to know what's wrong.

First I create a new C++ project as a static lib called "a". After that I create a new class called "aClass" with the following static method:

static int addTwo(int num);

Now I create a program that should use the created library. I make a new C++ project called "b" as a hello world project. Now I go to the options of this project and change the following:

• Add the include path of project "a" to project "b" so eclipse sees the aClass.h file
• I add the workspace of project "a" to the linker libraries
• I add the "a" to the libraries

Then I change my code of the main file in the "b" project and adds the header file of "a" and write a small line of code which should use a function of "a":

int i = aClass::addTwo(1);

When compiling with eclipse I get the following error:

Building target: b
Invoking: GCC C++ Linker
g++ -L"/home/barti/workspace/a" -o"b"  ./src/b.o   -la
/usr/bin/ld: cannot find -la
collect2: ld returned 1 exit status
make: *** [b] Fehler 1

What should I do?

Answer 1

What is name of your lib file?

Is it liba.so?

Some time library build with ".a" or "so.1" kind of extension this may cause issue.

Try to do following

ln -s <current name> liba.so

Answer 2

Is the liba.a file actually present in /home/barti/workspace/a ? I'm not familiar with C++ development using Eclipse, but GCC does not seem to find it in that directory (which was supposedly added to the link path by Eclipse).