postgresql/src/backend/utils
Thomas Munro 8d9a9f034e All supported systems have locale_t.
locale_t is defined by POSIX.1-2008 and SUSv4, and available on all
targeted systems.  For Windows, win32_port.h redirects to a partial
implementation called _locale_t.  We can now remove a lot of
compile-time tests for HAVE_LOCALE_T, and associated comments and dead
code branches that were needed for older computers.

Since configure + MinGW builds didn't detect locale_t but now we assume
that all systems have it, further inconsistencies among the 3 Windows build
systems were revealed.  With this commit, we no longer define
HAVE_WCSTOMBS_L and HAVE_MBSTOWCS_L on any Windows build system, but
we have logic to deal with that so that replacements are available where
appropriate.

Reviewed-by: Noah Misch <noah@leadboat.com>
Reviewed-by: Tristan Partin <tristan@neon.tech>
Reviewed-by: Peter Eisentraut <peter@eisentraut.org>
Discussion: https://postgr.es/m/CA%2BhUKGLg7_T2GKwZFAkEf0V7vbnur-NfCjZPKZb%3DZfAXSV1ORw%40mail.gmail.com
2023-07-09 11:55:18 +12:00
..
activity Add newline at the end of header generated by generate-wait_event_types.pl 2023-07-06 13:35:50 +09:00
adt All supported systems have locale_t. 2023-07-09 11:55:18 +12:00
cache Rename EVT cache hash to make context name unique 2023-07-05 08:53:09 +02:00
error Update copyright for 2023 2023-01-02 15:00:37 -05:00
fmgr Pre-beta mechanical code beautification. 2023-05-19 17:24:48 -04:00
hash Update copyright for 2023 2023-01-02 15:00:37 -05:00
init Error message wording improvements 2023-06-29 09:14:55 +02:00
mb Pre-beta mechanical code beautification. 2023-05-19 17:24:48 -04:00
misc Add GUC parameter "huge_pages_status" 2023-07-06 14:42:36 +09:00
mmgr Re-bin segment when memory pages are freed. 2023-07-04 15:16:47 +12:00
resowner Pre-beta mechanical code beautification. 2023-05-19 17:24:48 -04:00
sort nbtree: Allocate new pages in separate function. 2023-06-10 14:08:25 -07:00
time Pre-beta mechanical code beautification. 2023-05-19 17:24:48 -04:00
.gitignore Rearrange makefile rules for running Gen_fmgrtab.pl. 2018-05-03 17:54:18 -04:00
Gen_dummy_probes.pl Pre-beta mechanical code beautification. 2023-05-19 17:24:48 -04:00
Gen_dummy_probes.pl.prolog Update copyright for 2023 2023-01-02 15:00:37 -05:00
Gen_dummy_probes.sed Update copyright for 2023 2023-01-02 15:00:37 -05:00
Gen_fmgrtab.pl Pre-beta mechanical code beautification. 2023-05-19 17:24:48 -04:00
Makefile Update copyright for 2023 2023-01-02 15:00:37 -05:00
README.Gen_dummy_probes Tweak generation of Gen_dummy_probes.pl 2021-05-11 20:02:02 -04:00
errcodes.txt Update copyright for 2023 2023-01-02 15:00:37 -05:00
generate-errcodes.pl Pre-beta mechanical code beautification. 2023-05-19 17:24:48 -04:00
meson.build Update copyright for 2023 2023-01-02 15:00:37 -05:00
postprocess_dtrace.sed Update copyright for 2023 2023-01-02 15:00:37 -05:00
probes.d bufmgr: Introduce infrastructure for faster relation extension 2023-04-05 16:21:09 -07:00

README.Gen_dummy_probes

# 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.