CODEWITHSUNDEEP
clinuxgcc
jokkemokke
jokkemokke

Reputation: 23

gcc cannot find function in lib

I am trying to make a C program using libmbus, which I have installed on my raspberry pi. In my /usr/lib directory I have the file libmbus.so and in my /usr/include directory I have the the file ./mbus/mbus.h.

The program looks like this:

#include <stdio.h>
#include <mbus/mbus.h>

int main(void)
{
    mbus_handle* MbusHandle;

    MbusHandle = mbus_connect_serial("/dev/ttyS1");

    return 0;
}

When I try to run "gcc main.cpp -lmbus" I get:

main.cpp:(.text+0xe): undefined reference to `mbus_connect_serial(char const*)'

I tried to run

nm -D /usr/lib/libmbus.so

which among others gives

00009930 T mbus_connect_serial

So it appears that the function mbus_connect_serial is part of libmbus.so.

In the header file the function mbus_connect_serial is defined like this:

mbus_handle * mbus_connect_serial(const char * device);

I can't seem to figure out what is wrong. Can anyone guide me in the right direction?

Upvotes: 1

Views: 1878

Answers (1)

KevinDTimm
KevinDTimm

Reputation: 14376

If you're really trying to create a c program, rename main.cpp to main.c

Upvotes: 2

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