e.g. The first symbol would be blank/corrupted when running:
    printf("%s %s\n", func, func)

This was caused by a dodgy conversion from std::string
to C-string, where the result of ".c_str()" was being
saved, but the underlying std::string was modified by
the vector it was being stored in, invalidating the C-string

fix for #18: initializing comm memory

Static linking can be selected with -DSTATIC_LINKING:BOOL=ON

BCC API for attaching tracing events has been cleaned up - no more perf
readers

Store number of online CPUs, so we don't need to read /sys/devices/system/cpu/online while probes are running

e.g. kprobe:[Ss]y[Ss]_read { ... }

tracepoint:random:*_read { ... }
kprobe:sys_read, uprobe:/bin/bash:readline { ... }

Previously the auto-generated key type was the same as the value type,
which made maps containing string values use far more stack memory than
they should when accessing them.

Commit 3dd703a5 didn't fix it as intended