please note that the macros are not in the order.
dSP;
SAVETEMPS;
PUSKMARK;
XPUSHs(SV equivalent for the First string);
XPUSHs(SV equivalent for the second string);
:
:
:
XPUSHs(SV equivalent for the Nth string);
call_pv("pkg1::Process",G_SCALAR);
something goes here

##</code><code>##

void Process(char *p)
{
 // some processing
}

main()
{
char Str[500];
strcpy(Str,"slkdjaslkdjsljdlkjas");
Process(&Str);