Thread: Please help with compiling a program

Hi,

I am totally new to C. I want to run serial commands from a Bealgebone to a 4Dsystems display. Therefore I copied the c library found here:

https://github.com/4dsystems/Picaso-Serial-C-Library

into a directory and created a test program main.c:

Code:

#include"Picaso_const4D.h" 
#include"Picaso_Serial_4DLibrary.h"

int main(int argc,char*argv[])
{
    OpenComm("/dev/ttyUSB0", B115200);// Matches with the display "Comms" rate
    gfx_BGcolour(0xFFFF);
    gfx_Cls();
    gfx_CircleFilled(120,160,80,BLUE);
    while(1){}
}

Now when I do

Code:

gcc -o main main.c

its says

main.c:2:37: fatal error: Picaso_Serial_4DLibrary.h: No such file or directory

So I try linking it:

Code:

gcc main.c  -L.-lPICASO_SERIAL_4DLIBRARY

which gives me the same error. Then I tried to create a static library:

Code:

gcc -Wall-g -c -o PICASO_SERIAL_4DLIBRARY PICASO_SERIAL_4DLIBRARY.C

which gives me this:

PICASO_SERIAL_4DLIBRARY.C:1:21: fatal error: windows.h: No such file or directory compilation terminated.

Same error message when I include

Code:

gcc main.c -Wall-L.-lPICASO_SERIAL_4DLIBRARY
-I/path/to/4Dsystems/C/Include

What am I doing wrong? the git page clearly says this library is created for people who do not run windows.
Thanks in advance!

You first need to compile the source code into a library (object file). It also looks to me like it's written with Windows in mind, so you'd have to modify the code a little first (which I would assume is beyond you right now). I just did a web search and found a little tutorial on getting started with GCC compilation. Consider giving that a look; GCC can be picky about the order of the arguments you give it and details like that.

Ok I think I found out what you mean. Like create a shared library?

I followed these steps here

Shared libraries with GCC on Linux - Cprogramming.com

however right after the first compile

Code:

gcc -c -Wall -Werror -fpic PICASO_SERIAL_4DLIBRARY.C

I get this

PICASO_SERIAL_4DLIBRARY.C:1:0: error: -fpic ignored for target (all code is pos
tion independent) [-Werror]
#include <windows.h>
^
cc1plus.exe: all warnings being treated as errors

I tried finding the problem but couldn't, since I use windows now I don't now why this happens?

Well you're not being helped by the fact that filenames are case sensitive, and all the files in the repository are in upper case.

Code:

$ find C -type f
C/Samples/BIGDEMO.PRJ
C/Samples/BIGDEMO.H
C/Samples/LCC/BIGDEMO.EXE
C/Samples/BIGDEMO.C
C/Lib/PICASO_SERIAL_4DLIBRARY.C
C/Lib/PICASO_SERIAL_4DLIBRARY.H
C/Lib/PICASO_SERIAL_4DLIBRARY.PRJ
C/Include/PICASO_CONST4D.H
C/Include/PICASO_COMPOUND4DROUTINES.INC
C/Include/PICASO_TYPES4D.H
C/Include/PICASO_CONST4DSERIAL.H
C/Include/PICASO_SERIAL_4DLIBRARY.~H
C/Include/PICASO_SERIAL_4DLIBRARY.H
C/Include/PICASO_INTRINSIC4DROUTINES.INC

$ cat main.c
#include"PICASO_CONST4D.H" 
#include"PICASO_SERIAL_4DLIBRARY.H"

int main(int argc,char*argv[])
{
    OpenComm("/dev/ttyUSB0", B115200);// Matches with the display "Comms" rate
    gfx_BGcolour(0xFFFF);
    gfx_Cls();
    gfx_CircleFilled(120,160,80,BLUE);
    while(1){}
}

$ gcc -c -IC/Include main.c
In file included from main.c:2:0:
C/Include/PICASO_SERIAL_4DLIBRARY.H:1:76: fatal error: Picaso_Types4D.h: No such file or directory
compilation terminated.

$ head C/Include/PICASO_SERIAL_4DLIBRARY.H
#include "Picaso_Types4D.h"			// defines data types used by the 4D Routines

// SPE Version 1.2 added peekM and pokeM
// SPE Version 1.1 added bus_ and pin_ functions

#define   Err4D_OK      0
#define   Err4D_Timeout 1
#define   Err4D_NAK		2 // other than ACK received

The library itself can't get it's own naming correct.

There aren't that many files, so you might consider just renaming them to match the way they're written in the code.