i've been trying to make an application that combines Qt and OpenCV, and then deploy this application on a RaspberryPi.
i managed to cross compile Qt to run applications i built on my host machine on the RaspberryPi but whenever i want to use OpenCV with it, i fail to get to work. The first time i had incompatible libraries with ARM (they were x86-64) and now when i installed ARM version of OpenCV i get this error in Qt Creator (cannot find -lm).
Can u please tell me how to cross compile OpenCV as well ? Thank you
I am trying to learn how to use allegro 5, but all of the tutorials I can find are using either code blocks or dev c++. I have compiled a program fine on windows without using a library using mingGw alone, how would I create and compile an allegro program without an ide?
You can configure MinGW or Cygwin to build allegro. This is a complete MinGW port of Allegro:
http://liballeg.org/stabledocs/en/build/mingw32.html
I am using Netbeans to cross-compile C++ code for raspberry pi with arm-linux-gnueabihf-raspbian. Compiling works fine and I am able to run programs on raspberry but I can't figure out how to add external library files such as RF24 or WiringPi.
According some sources I should create a configure file to install libraries to toolchain but being a newbie to linux, I have no idea how. What should I do?
Thank you, that solved one part of the problem. What I needed to do was to install libraries normally to raspberry pi and then copy the just installed library files from pi#:/usr/local/lib to project folder at local computer and then do as you said. Now everything seems to be working.
With a RaspBerry Pi and from my computer, I'm trying to cross-compile a simple helloWorld written in C++. I'm using Code Sourcery toolchain for linux to compile.
When copy the helloWorld binary to raspBerry by TFTP and give it execution permissions with chmod, the next error appears:
"Illegal instruction"
If make a 'file' over binary I get:
"raspberry: ELF 32-bit LSB executable, ARM, version 1 (SYSV), statically linked, stripped"
This is because I used "-static -static-libstdc++" when linking.
If I don't use static linking, the error is:
"Segmentation fault"
The Code:
/*
* main.cpp
*
* Created on: 26/06/2012
* Author: ccortiz
*/
#include <iostream>
using namespace std;
int main(void){
cout << "Hello Cross Compilling for ARM!" << endl << flush;
return 0;
}
How could I compile and run my program in a right way?
Thanks.
The reason why are you getting Segmentation fault error is different ABI. Raspberry Pi when running Raspbian is using linux-arm-gnueabihf ABI which assumes hardfp and VFP support in hardware (which is rare in ARMv6 environment) so requires some additional patches for GCC and EGLIBC (these patches can be found in Raspbian repository).
Your Code Sourcery cross-toolchain most likely does not have these patches, so it's using another ABI (linux-arm-gnueabi) hence the crash at runtime (static linking works because kernel ABI does not depend on hardfp/softfp).
Another possible reason why you may be getting Illegal Instruction error is Code Sourcery cross-toolchain configured for ARMv7 and Raspberry Pi is ARMv6. But in this case both static and dynamic linking will yield the same error.
Here is a step-by-step guide how to build Raspberry Pi cross compiler in Windows, both hardfp/softfp ABI versions. Resulting cross-compiler supports C++ and does not depend on cygwin runtime library (cygwin1.dll).
The problem was to use ASCII mode instead of binary mode in my FTP transfers.
Today I prefer to use SFTP (SSH).
Thanks.
I'd recommend trying biicode, it automatically sets up the cross compiler environment for you and sends generated binaries to the raspberry after building
You could try the toolchain at: https://github.com/kallaballa/Raspberry-GCC-4.7.3
It's a pre-built gcc-4.7.3 toolchain for armv6 with hardfp using gnueabi. I'm using it to cross compile c++11 for a raspberrian target.
Please note it only works on linux x86_64 hosts.
My recommendation is here, http://hertaville.com/2012/09/28/development-environment-raspberry-pi-cross-compiler/
He does a good job on explaining how to use Eclipse to compile HelloWorld.cpp, download, and execute it in Raspberry pi board. Check it out.
Using Visual studio and Visual GDB plugin you can download cross compiler for raspberry pi. After that you can create a ssh connection and also you can deploy your program remotely into raspberry pi.
I installed Eclipse for C/C++ Developers.
After installing it I also installed PyDev.
I managed to create a C++ project (The Hello World project that comes with it). But I cannot compile/run it.
When I created the project there was nothing in the toolchain list. So I think I will need to install a toolchain. But I cannot find anything. I need someone to help me with this please.
I am using 64 bit Windows 7.
No compiler, no executable.
Check MinGW
This is one of the first results i got in google for eclipse and mingw:
http://max.berger.name/howto/cdt/cdt.jsp
You need to install not only Eclipse CDT, but also a C/C++ compiler for Windows, like minGW.
Try installing TDM-GCC from http://tdm-gcc.tdragon.net/ . This should have you up and going with a compatible GCC setup under Windows in a snap.