segmenntation fault 'system()' GPIO access

Forum: Linux
blue 
Hi

Randomly, some times I receive segmenntation fault with system() command in
my Qt application.
I use system() command for GPIO access 
for example
    system("echo 1 > /sys/class/gpio/gpio193/value");
 
on
arm-qte-4.7.3 (-O2)
arm-none-linux-gnueabi- 4.4.3
linux-2.6.32.2

not -O0 optimization or arm-qte-4.6.3 are useful

I will be appreciated with your comments and suggestion

thanks in advance

open-nandra 
Why you're using system to access. /sys/class/gpio/gpio193/value is normal
file so you can open it and read and write how much u want ;). For your
problem just use strace to debug a problem. Did you check return value?

Marek

blue 
thanks marek
I was unsuccessfull in installation of strace-4.6 and olders. 

./configure --target=arm-none-linux-gnueabi --host=arm-none-linux-gnueabi
make
make install
 
then I copied the strace-4.6 directory to mini2440 
but any attempts to 

./strace myApp

leads to segmentation faults