Ok, I’m looking for a solution for 2 days now. I didn’t find anything to solve my problems.
What is currently going on? So, I tried creating a dynamic library (.so) on Linux Mint Maya 13 with g++.
foolib.h:
#pragma once #include <stdio.h> void foo( void );
foolib.cpp:
#include "foolib.h" void foo( void ) { printf ("Hello World!n"); };
main.cpp:
#include "foolib.h" int main( int argc, char** argv ) { foo (); };
I compiled these files with these instructions:
libfoo.so:
g++ -shared -o libfoo.so -fpic foolib.cpp
foo:
g++ main.cpp -o foo -L -lfoo
Creating libfoo.so works without any errors, but foo throws undefined reference ´foo’. I copied sample code from several web pages and tried to compile it, always the same result.
The funny is, I can link do libdl.so (-ldl), load my .so and my function. What am I doing wrong?
I hope I could formulate my question correctly. Please tell me if I didn’t. : )
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Answer
You should use:
g++ main.cpp -o foo -L./ -lfoo
or
g++ main.cpp -o foo libfoo.so