To use the macros that identify a function as an interrupt service routine, you must include the following file:
#include <sys/attribs.h>

extern "C"
void _ISR(vector, IPLn[SRS|SOFT|AUTO]) functionName();

Parameter Description Possible Values
vector PIC32 Interrupt Vector Number see here
IPLn[SRS|SOFT|AUTO] Interrupt Priority Level and Context Save Method n is a value from 0 to 7
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