Solved Linker error - FreeBSD 11 on Rpi B+

[rodneygmorgan]

Disclaimer: I haven't written and compiled a C program in over 20 years.

This is probably something very simple, but I'm stuck. Can someone point out my error?

Compile/Link command:
cc -v -llibgpio act.c -o act

Linker error:

/usr/bin/ld: cannot find -llibgpio
cc: error: linker command failed with exit code 1 (use -v to see invocation)

libgpio exists (and is part of the FreeBSD 11 distribution for Rpi B+)

root@garagepi:/home/rmorgan # locate libgpio
/usr/include/libgpio.h
/usr/lib/libgpio.a
/usr/lib/libgpio.so
/usr/lib/libgpio.so.0
/usr/lib/libgpio_p.a

Program source code:

#include <sys/types.h>
#include <err.h>
#include <libgpio.h>

int main() {
     gpio_handle_t handle;

     handle = gpio_open(0);
     if (handle == GPIO_INVALID_HANDLE)
             err(1, "gpio_open failed");
     gpio_pin_output(handle, 47);
     gpio_pin_high(handle, 47);
     gpio_close(handle);
}

 

[tobik@]

It has to be cc -lgpio act.c -o act (without the lib prefix).

 

[rodneygmorgan]

Unbelievably simple! Thanks for the fast response. It compiled/linked successfully with the correct parameters.