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.
Generally, if you are an F-1 student who wants to apply for OPT, you must: 1  Request that your designated school official (DSO) at your academic institution recommend the OPT. Your DSO will make the recommendation by endorsing your Form I-20 and making the appropriate notation in the Student and Exchange Visitor Information System (SEVIS).