Using -openmp and the effect of -auto in preparing a serial code to use OPenMP

Hi all,

I have a large serial code (>15k line of code) with COMMONs blocks. I wanted to start transffering some time consuming loops to work under OpneMP parallelism. After reading some different posts in Intel's forums (i.e.:https://software.intel.com/en-us/forums/topic/279757), I decided to prepare first my code for OpenMP by adding the -auto compiler option to my set of flgas.

I'm getting different results. I'm aware to the dafult -openmp which sets also -auto. My question is - how to intial local variables / arrays in a robust way, including the COMMON blocks (at the begining of the code) to get the very same results only by adding the -auto.

The following step would be using -openmp flag / without any caluases for now - only to verify that the defualt behavior is not messing my calculations.

Thanks for any detailed insight that you can provide.

Jack.