tracespec
_dl_trace_parse_spec(const char *var, struct tracespec *spec)
_dl_trace_match(const char *name, struct tracespec *spec, int allow_so)
static struct tracespec _dl_tracelib, _dl_tracefunc;
static const char *_dl_trace_parse_spec(const char *, struct tracespec *);
static int _dl_trace_match(const char *, struct tracespec *, int);
if (tracespec &&
setenv("LD_TRACE_PLTSPEC", tracespec, 1) < 0)
char *tracefile, *tracespec;
tracespec = NULL;
tracespec = optarg;