Enable -ftrapv and -fcatch-undefined-behavior to catch undefined behavior when possible
Enable -ftrapv and -fcatch-undefined-behavior to catch undefined behavior when possible

kolyuchiy/libextobjc,WPDreamMelody/libextobjc,sanojnambiar/libextobjc,goodheart/libextobjc,telly/libextobjc,liuruxian/libextobjc,bboyesc/libextobjc,jiakai-lian/libextobjc,KBvsMJ/libextobjc,sandyway/libextobjc,sunfei/libextobjc