my cross compiler has error.tslib install but has error

MhM93

I do not install qt creator to see debug mood in my pc, and also this program is run on nanopc-t2 when I wrote this command it returns :

root@NanoPC-T2:/# strace ./helloqt
execve("./helloqt", ["./helloqt"], [/* 20 vars */]) = 0
brk(NULL)                               = 0x21000
uname({sysname="Linux", nodename="NanoPC-T2", ...}) = 0
access("/etc/ld.so.nohwcap", F_OK)      = -1 ENOENT (No such file or directory)
mmap2(NULL, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0xb6f67000
access("/etc/ld.so.preload", R_OK)      = -1 ENOENT (No such file or directory)
--- SIGSEGV {si_signo=SIGSEGV, si_code=SEGV_MAPERR, si_addr=0x4} ---
+++ killed by SIGSEGV +++
Segmentation fault

Also why do you start it twice:
with silly reason. I just test what happen to run command with & and without it. :)

jsulm

@MhM93 You don't need to install QtCreator to debug (QtCreator itself does not have a debugger). Just install gdb on your target device and use it. It looks like your app is running except you try to run two instances at the same time.

jsulm

@MhM93 See here: http://stackoverflow.com/questions/1656891/problems-with-multiple-qapplications

MhM93

thanks for reply. but i just play one application.
oot@NanoPC-T2:/# rm helloqt
root@NanoPC-T2:/# tftp 192.168.101.4
tftp> get helloqt
Received 11692 bytes in 0.5 seconds
tftp> quit
root@NanoPC-T2:/# chmod +x helloqt
root@NanoPC-T2:/# ./helloqt -qws
Segmentation fault
root@NanoPC-T2:/# file ./helloqt
./helloqt: ERROR: ELF 32-bit LSB executable, ARM, EABI5 version 1 (SYSV), dynamically linked, interpreter /lib/ld-linux-armhf.so.3 error reading (Invalid argument)
root@NanoPC-T2:/#

SGaist

Again, run it through the debugger.

By the way, what is the exact architecture of your device ?
What Linux distribution are you running on it ?

MhM93

thanks for reply,
I should install debugger on my host or on my target?
this is my device:

root@NanoPC-T2:/# uname -a
Linux NanoPC-T2 3.4.39-s5p4418 #1 SMP PREEMPT Wed Mar 1 13:21:10 HKT 2017 armv7l armv7l armv7l GNU/Linux

when I run gdb on my device (nanopc-t2):

root@NanoPC-T2:/# gdb -q helloqt
"/helloqt": not in executable format: File truncated

and also when I run this:

root@NanoPC-T2:/# sudo readelf -a ./helloqt | grep NEEDED
readelf: Error: Reading 0x618 bytes extends past end of file for section headers
readelf: Error: Section headers are not available!
 0x00000001 (NEEDED)

Is that mean my header is wrong?
this is my code:

#include <QApplication>
#include <QPushButton>
int main(int argc, char **argv)
{
        QApplication app (argc, argv);
        QPushButton button ("Hello world !");
        button.show();
        return app.exec();
}

SGaist

Looks like there is a problem with your file. How are you copying it over to your device ?

MhM93

*I copy it by tftp. First I copy it from ubuntu vmware to windows then wrote this command to copy it to my device:

tftp 192.168.101.4
tftp>get helloqt
//after transfering.....
tftp>quit

first run this command

. setqt4env

and after that run this command, I make my file runable with this command:

chmod +x helloqt

then I run it with this command but that error show to me:

./helloqt -qws

................................................................................................................................................................................
FINALLY RUN MY APP ON ME DEVICE BUT MAKE A LOT OF QUESTION FOR ME:
.............................................................................................................................................................................
I set my ssh to deploy the qt (from vmware ubuntu to my nanopc) also set this to .pro file:

#-------------------------------------------------
#
# Project created by QtCreator 2017-05-13T01:48:28
#
#-------------------------------------------------

QT       += core gui

greaterThan(QT_MAJOR_VERSION, 4): QT += widgets

target.path = ~/helloqt
INSTALLS += target

TARGET =
TEMPLATE = app


SOURCES += main.cpp\
       mainwindow.cpp

HEADERS  += mainwindow.h

FORMS    += mainwindow.ui

and set -qws in argument and suddenly see the project run on my device BUT the touch is not worked
when I copy the file to my device as I said above* the app is can not run. what is the different from my code runable and qt runable app?

SGaist

Why don't you upload it directly to your device ?
Using e.g. scp ?

MhM93

sorry , but what is SCP?
I don't know other way to transferring my app to my device

jsulm

@MhM93 Why don't you use Google?
First match there for "scp" is: https://en.wikipedia.org/wiki/Secure_copy

MhM93

sorry At first I searched it, but I found this:

SCP Foundation
From Wikipedia, the free encyclopedia
SCP Foundation SCP Foundation (emblem).svg
The logo of the SCP Foundation
Available in English[a]
Slogan(s) Secure, Contain, Protect
Website www.scp-wiki.net
Alexa rank 15,140 (Apr 2017)[3]
Registration Required[b]
Launched July 19th, 2008[4]
Current status Active
Content license
CC Attribution / Share-Alike 3.0 The SCP Foundation is a fictional organization that is the subject of a web-based collaborative writing project. (SCP stands for "Special Containment Procedures", though it also refers to the organization's slogan of "Secure, Contain, Protect".) The stories generated by the project describe the exploits of the Foundation, supposedly responsible for containing individuals, entities, locations, and objects that violate natural law (referred to as SCPs). The main written works on the SCP Foundation website are articles written in the style of structured internal documentation about the contained SCPs.

and I confused what is SCP, sorry for silly ask, excuse me,thanks for secure copy @jsulm and @SGaist
thanks for all help
thanks a lot with best wishes for you

MhM93

BEST CONFIGURE:

sudo ac_cv_func_malloc_0_nonnull=yes ./configure CC=/opt/FriendlyARM/toolchain/4.9.3/bin/arm-none-linux-gnueabihf-gcc CXX=/opt/FriendlyARM/toolchain/4.9.3/bin/arm-none-linux-gnueabihf-g++ --host=arm-none-linux-gnueabihf target=arm-none-linux-gnueabihf --enable-static=yes --enable-shared=yes -prefix=/home/tslib

SGaist

Why sudo ? There's no reason to configure nor compile as root.

MhM93

I dont know why but when I omit the sudo command it shows me error to open some files.

SGaist

What files ? Where are they ?

Usually that's the kind of thing that start to happen when ones tries to solve a problem using sudo "because it works" rather than find the cause of the original problem which generally leads the snake biting its tail because the first use of sudo makes one or more files only owned by root and its group and thus not accessible etc.