Gprof error on Linux

[Sudipta Sinha]

I tried the following to profile my application on Linux2.4 

* changed CFLAGS in the Makefile to include '-pg -g'
* make clean
* make
* ran my application

Gave me an error at start up 

ti_viewer Line:17068 Illegal Instruction  ( weird !! i am compiling and
running on the same machine - 2.4.18-10smp )  

gcc -v

>> gcc version 2.96


the point where my program was crashing was a call to a function which was
taking a Function pointer as parameter.

viewer.hpp:extern void GoViewer(void (*displayfunc)())


Do you know why this might be happening ? 

---------

I tried one more thing - 

* modified the Makefile to compile only some of the src files using -pg -g
, ( compiled the file viewer.hpp without it ) 

* this time the binary ran fine 
* However when i tried to shut down my program - its said

_mcleanup: gmon.out permission denied

and the gmon.out file was not created !!

[ I had write permission on the directory ]
[ I am exitting normally using exit(0)    ]

Do you know how to fix these problems ? 

Thanks,
Sudipta