Illegal instruction with int divisions

Dears 

I also have some illegal instrction while running my application on target.
i am using the 4.3.2 compiler version with the following options

-msoft-float -D__GCC_FLOAT_NOT_NEEDED -march=armv4t -mtune=arm920t -O0

but when I run my simple application I have the illegal error.

my application is really easy.

int main()
{
  unsigned short   __crcBlockSize = 16384;
  size_t           __sectionSize  = 392;
  unsigned int     res = 0;
 
  res = (__sectionSize+ __crcBlockSize+3) / (__crcBlockSize+4);
  printf("res : %d\n",res);
  
  return 0;
}

if I do the same operation with values instead of variable then it works
fine of course.

note that this application compiled with -O0 does not work but it runs fine
with -Os, -O1 or even -O2... so really strange

Where is size_t typedef'ed.  Do you have a bunch of include files before
this?

Is it the correct printf parameter?  (%d?, integer versus float?)

size_t was correctly defined in stddef.h.

but after some investigation I found that the -march=armv4t option was not
passed to the linker and cause that issue.

as a consequence my exe was compiled for ARMV10. I found this with the
readelf application.
after adding the correct architecture on my linker command line everything
is working fine.

I am still surprise that the target does not complain that the exe has not
been compiled for the correct target...

thx for your help.