Gen_dummy_probes.pl: Gen_dummy_probes.sed

perl -ni -e ' print; exit if /^\$$0/;' $@

s2p -f $< | sed -e 1,4d -e '/# #/d' -e '$$d' >> $@

perltidy --profile=../../tools/pgindent/perltidyrc $@

perl -pi -e '!$$lb && ( /^\t+#/ || /^# prototypes/ ) && print qq{\n};'\

-e '$$lb = m/^\n/; ' $@

# Generating dummy probes

If Postgres isn't configured with dtrace enabled, we need to generate

dummy probes for the entries in probes.d, that do nothing.

This is accomplished in Unix via the sed script `Gen_dummy_probes.sed`. We

used to use this in MSVC builds using the perl utility `psed`, which mimicked

sed. However, that utility disappeared from Windows perl distributions and so

we converted the sed script to a perl script to be used in MSVC builds.

We still keep the sed script as the authoritative source for generating

these dummy probes because except on Windows perl is not a hard requirement

when building from a tarball.

So, if you need to change the way dummy probes are generated, first change

the sed script, and when it's working generate the perl script. This can

be accomplished by using the perl utility s2p.

s2p is no longer part of the perl core, so it might not be on your system,

but it is available on CPAN and also in many package systems. e.g.

on Fedora it can be installed using `cpan App::s2p` or

`dnf install perl-App-s2p`.

The Makefile contains a recipe for regenerating Gen_dummy_probes.pl, so all

you need to do is once you have s2p installed is `make Gen_dummy_probes.pl`