So I’m getting a error with compiling PROS and I’m not sure how to fix it. I have a header file called functions.h which has some functions in it and that is #include "functions.h" in my main.h file. Now when ever I compile I get errors in the linking telling me that the function was first defined here To my understanding that means It has already been defined somewhere but I don’t understand how that would be. I would be much appreciative of any help given.
Here’s my code, I’m using C for this btw. Output of make at the very bottom.
main.h
#ifndef _PROS_MAIN_H_
#define _PROS_MAIN_H_
//#define PROS_USE_SIMPLE_NAMES //Allow for shorting naming of enum for things like buttons and the controller and other commonly used enums
#define E_CONTROLLER_MASTER master //Just makes thing shorter
//Defining ports for everything
#define FL_MTR_PORT 5 //FL_MTR:Front Left Motor
#define FR_MTR_PORT 15 //FR_MTR:Front Right Motor
#define BL_MTR_PORT 4 //BL_MTR:Back Left Motor
#define BR_MTR_PORT 13 //BR_MTR:Back Right Motor
//Holds the max velocity for each motors gear box
#define MOTOR_GEARBOX_RED 100
#define MOTOR_GEARBOX_GREEN 200
#define MOTOR_GEARBOX_BLUE 600
//Includes should be put here
#include "api.h"
#include <math.h>
#include "types.h"
#include "functions.h"
//Prototypes for the competition control tasks are redefined here to ensure
//that they can be called from user code (i.e. calling autonomous from a
//button press in opcontrol() for testing purposes).
#ifdef __cplusplus
extern "C" {
#endif
void autonomous(void);
void initialize(void);
void disabled(void);
void competition_initialize(void);
void opcontrol(void);
#ifdef __cplusplus
}
#endif
#ifdef __cplusplus
/**
* You can add C++-only headers here
*/
//#include <iostream>
#endif
#endif // _PROS_MAIN_H_
functions.h
#ifndef _FUNCTIONS_H_
#define _FUNCTIONS_H_
//Use this to clamp a interger.
//clampInteger (&n , Minimum , Maximum);
void clampInteger (int *ptrn, int f, int c)
{
*ptrn = (*ptrn<f) ? f : *ptrn;
*ptrn = (*ptrn>c) ? c : *ptrn;
}
//n = keepNegativeExponent (n, Exponent);
int keepNegativeExponent (int n, double e)
{
int m;
m = abs(n);
return n = ((n>=0) ? pow(n, e) : pow(m, e) * -1);
};
#endif // _FUNCTIONS_H_
opcontrol.c
#include "main.h"
extern struct Base driver;
//Joystick vaules
int anlx, anly, anrx;
void opcontrol() {
//Careful, this loop can not be exited from inside. Change if needed.
for (;;) {
}
}
initialize.c
#include "main.h"
void initialize()
{
struct Base driver;
//Setup for all of the motors
//These are the drive motors, E_MOTOR_GEARSET_18 = 1, E_MOTOR_ENCODER_ROTATIONS = 1
driver.motor[0] = FL_MTR_PORT; driver.motor[1] = FR_MTR_PORT; driver.motor[2] = BL_MTR_PORT; driver.motor[3] = BR_MTR_PORT;
for (int i=0;i<4;i++)
{
motor_set_reversed (driver.motor[i], false);
motor_set_gearing (driver.motor[i], 1);
motor_set_encoder_units (driver.motor[i], 1);
}
}
void disabled()
{
}
void competition_initialize()
{
}
autonomous.c is just the default template.
Output of prosv5 make
laptop :: ~/git/VEX-2019-Tower-takeover ‹testing*› » prosv5 make
Compiling src/autonomous.c [OK]
Compiling src/initialize.c [OK]
Compiling src/opcontrol.c [OK]
Adding timestamp [OK]
Linking project with libpros,okapilib [ERRORS]
/usr/bin/../lib/gcc/arm-none-eabi/8.2.1/../../../../arm-none-eabi/bin/ld: ./bin/initialize.c.o: in function `clampInteger':
initialize.c:(.text.clampInteger+0x0): multiple definition of `clampInteger'; ./bin/autonomous.c.o:autonomous.c:(.text.clampInteger+0x0): first defined here
/usr/bin/../lib/gcc/arm-none-eabi/8.2.1/../../../../arm-none-eabi/bin/ld: ./bin/initialize.c.o: in function `keepNegativeExponent':
initialize.c:(.text.keepNegativeExponent+0x0): multiple definition of `keepNegativeExponent'; ./bin/autonomous.c.o:autonomous.c:(.text.keepNegativeExponent+0x0): first defined here
/usr/bin/../lib/gcc/arm-none-eabi/8.2.1/../../../../arm-none-eabi/bin/ld: ./bin/opcontrol.c.o: in function `clampInteger':
opcontrol.c:(.text.clampInteger+0x0): multiple definition of `clampInteger'; ./bin/autonomous.c.o:autonomous.c:(.text.clampInteger+0x0): first defined here
/usr/bin/../lib/gcc/arm-none-eabi/8.2.1/../../../../arm-none-eabi/bin/ld: ./bin/opcontrol.c.o: in function `keepNegativeExponent':
opcontrol.c:(.text.keepNegativeExponent+0x0): multiple definition of `keepNegativeExponent'; ./bin/autonomous.c.o:autonomous.c:(.text.keepNegativeExponent+0x0): first defined here
collect2: error: ld returned 1 exit status
make: *** [common.mk:191: bin/monolith.elf] Error 1
Error: Failed to build