Building with Optimization Level 2 took a very very long time

Dear All,

I am building my application by using the following command line:

cl6x.exe .\*.c -@..file.config

In this file.config I have:

* Compiler options for CCM1 () */

-mv6600
--abi=eabi 
-O2
-ms0 
-g 
--no_intrinsics 
--define=_USE_COM_TX_BUSY 
--display_error_number 
--diag_warning=225 
--diag_wrap=off 
--gen_func_subsections=on 
--sat_reassoc=off 
--fp_reassoc=on 
--mem_model:const=far 
--mem_model:data=far 
--wchar_t=16 
--fp_mode=strict

I have the following problem:

Using O2 as optimization my build takes aroung 4 hours. Using Ooff (no optimization) I have it in 5 minutes.

Is it normal? Is there anything that could help to increase the speed?

Thanks