[perl #120120] -Dusedtrace builds on solaris fail to build perldtrace.h on time

I hit this issue as well.  One possible fix is to have the dtrace header file generated when makedepend runs, either by patching makedepend or by updating the Makefile to have 'depend' have DTRACE_H as a dependency.  I've opted for the latter in the attached patch since it's such a minimal code change and already has the information as to whether dtrace is needed or not.

(Another option is to force a 'make hlist', which recurses down into DTRACE_H and generates the header file - make depend does that in some cases, but not all).

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via perlbug:  queue: perl5 status: open
https://rt.perl.org/Ticket/Display.html?id=120120

• [perl #120120] -Dusedtrace builds on solaris fail to build perldtrace.h on time by Peter Martini via RT