postgresql/src/backend/utils
Thomas Munro bcc8b14ef6 Remove configure probe for sockaddr_in6 and require AF_INET6.
SUSv3 <netinet/in.h> defines struct sockaddr_in6, and all targeted Unix
systems have it.  Windows has it in <ws2ipdef.h>.  Remove the configure
probe, the macro and a small amount of dead code.

Also remove a mention of IPv6-less builds from the documentation, since
there aren't any.

This is similar to commits f5580882 and 077bf2f2 for Unix sockets.  Even
though AF_INET6 is an "optional" component of SUSv3, there are no known
modern operating system without it, and it seems even less likely to be
omitted from future systems than AF_UNIX.

Reviewed-by: Andres Freund <andres@anarazel.de>
Discussion: https://postgr.es/m/CA+hUKGKErNfhmvb_H0UprEmp4LPzGN06yR2_0tYikjzB-2ECMw@mail.gmail.com
2022-08-26 10:18:30 +12:00
..
activity pgstat: Acquire lock when reading variable-numbered stats 2022-08-22 20:16:50 -07:00
adt Remove configure probe for sockaddr_in6 and require AF_INET6. 2022-08-26 10:18:30 +12:00
cache Make role grant system more consistent with other privileges. 2022-08-22 11:35:17 -04:00
error Provide log_status_format(), useful for an emit_log_hook. 2022-07-11 12:29:33 -07:00
fmgr Remove configure probe for dlopen, and refactor. 2022-08-05 09:12:45 +12:00
hash Update copyright for 2022 2022-01-07 19:04:57 -05:00
init Allow parallel workers to retrieve some data from Port 2022-08-24 12:57:13 +09:00
mb Update copyright for 2022 2022-01-07 19:04:57 -05:00
misc Remove HAVE_UNIX_SOCKETS. 2022-08-14 08:46:53 +12:00
mmgr Remove fls(), use pg_leftmost_one_pos32() instead. 2022-07-22 10:41:50 +12:00
resowner Remove extraneous blank lines before block-closing braces 2022-04-13 19:16:02 +02:00
sort Improve speed of hash index build. 2022-07-28 14:34:32 -04:00
time Optimize xid/subxid searches in XidInMVCCSnapshot(). 2022-08-11 09:17:42 +07:00
.gitignore Rearrange makefile rules for running Gen_fmgrtab.pl. 2018-05-03 17:54:18 -04:00
errcodes.txt Add another SQL/JSON error code 2022-07-18 14:26:43 +02:00
Gen_dummy_probes.pl Update copyright for 2022 2022-01-07 19:04:57 -05:00
Gen_dummy_probes.pl.prolog Update copyright for 2022 2022-01-07 19:04:57 -05:00
Gen_dummy_probes.sed Update copyright for 2022 2022-01-07 19:04:57 -05:00
Gen_fmgrtab.pl Update copyright for 2022 2022-01-07 19:04:57 -05:00
generate-errcodes.pl Add output file argument to generate-errcodes.pl 2022-07-18 12:24:35 -07:00
Makefile Clean up temp file from refactored dtrace rule 2022-07-19 07:31:58 +02:00
postprocess_dtrace.sed Refactor dtrace postprocessing make rules 2022-07-18 12:33:02 -07:00
probes.d Update copyright for 2022 2022-01-07 19:04:57 -05:00
README.Gen_dummy_probes Tweak generation of Gen_dummy_probes.pl 2021-05-11 20:02:02 -04:00

# 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`
Note that in a VPATH build this will generate the file in the vpath tree,
not the source tree.