dtrace: failed to compile script Preprocessor not found

[cneira]

Trying a Dtrace script this error was found, which is the same as TritonDataCenter/pkgsrc-legacy#22

rmustacc's answer to this issue.
TritonDataCenter/pkgsrc-legacy#22 (comment)

Installing gcc and then creating the symlink solves the issue

pfexec ln -sf /opt/local/gcc6/bin/cpp /usr/lib/cpp

I think we should add a c compiler in the base system as it's needed to use Dtrace.

[citrus-it]

We just need to make the dtrace package dependant on developer/macro/cpp since that provides /usr/lib/cpp

reaper# pkg search path:/usr/lib/cpp
INDEX      ACTION VALUE       PACKAGE
path       file   usr/lib/cpp pkg:/developer/macro/[email protected]

reaper# pkgtree -U depends dtrace

|------(    require)--pkg://omnios/developer/[email protected]:20180420T093101Z
| pkg://omnios/consolidation/osnet/osnet-incorporation
| pkg://omnios/system/library/[email protected]
| pkg://omnios/system/[email protected]
| pkg://omnios/[email protected]

That's something that we should get done in illumos-gate and then it will flow down to OmniOS