Even if a trip from home to your office (or other principal place of business) has a specific business purposeâfor example, to meet with a client at your officeâit is still considered commuting and is not eligible for a mileage deductible if you start out from your home.
If /DEBUG is specified, the default for /OPT is NOREF, and all functions are preserved in the image. To override this default and optimize a debugging build, specify /OPT:REF. Because /OPT:REF implies /OPT:ICF, we recommend that you also specify /OPT:NOICF to preserve identical functions in debugging builds. This makes it easier to read stack traces and set breakpoints in functions that would otherwise be folded together. The /OPT:REF option disables incremental linking.
Optional Practical Training (OPT) is temporary employment that is directly related to an F-1 studentâs major area of study. Eligible students can apply to receive up to 12 months of OPT employment authorization before completing their academic studies (pre-completion) and/or after completing their academic studies (post-completion).