If in a life or death situation where starvation will be the cause of death and you are forced to have pork, is it permissible not to eat it and allow yourself to die?
Usually we deal with questions related to practical issues which people experience in their day to day life. Your question looks like very far from day to day life, nevertheless if you want the answer for knowledge, it is obligatory to save our life. Deliberate failure in saving life and causing death is a sinful act. It is not permissible to cause death to yourself even if the only food available to remain alive is pork, but no more than what make you survive.
'Wassalam.