Horton

Re: [RFC] building postgres with meson

John Naylor <john.naylor@enterprisedb.com>

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From: John Naylor <john.naylor@enterprisedb.com>
To: Andres Freund <andres@anarazel.de>
Cc: pgsql-hackers <pgsql-hackers@postgresql.org>
Date: 2021-10-22T15:55:05Z
Lists: pgsql-hackers 
On Thu, Oct 21, 2021 at 5:48 PM Andres Freund <andres@anarazel.de> wrote:

> However, update-unicode is a bit harder.  Partially not directly because
of
> meson, but because update-unicode as-is afaict doesn't support VPATH
builds,
> and meson enforces those.

> make update-unicode
> ...
> make -C src/common/unicode update-unicode
> '/usr/bin/perl' generate-unicode_norm_table.pl
> Can't open perl script "generate-unicode_norm_table.pl": No such file or
directory
>
> It's not too hard to fix. See attached for the minimal stuff that I
> immediately found to be needed.

Thanks for doing that, it works well enough for demonstration. With your
patch, and using an autoconf VPATH build, the unicode tables work fine, but
it complains of a permission error in generate_unaccent_rules.py. That
seems to be because the script is invoked directly rather than as an
argument to the python interpreter.

> The slightly bigger issue making update-unicode work with meson is that
meson
> doesn't provide support for invoking build targets in specific directories
> (because it doesn't map nicely to e.g. msbuild). But scripts like
> src/common/unicode/generate-unicode_norm_table.pl rely on CWD. It's not
hard
> to work around that, but IMO it's better for such scripts to not rely on
CWD.

Yeah. I encountered a further issue: With autoconf on HEAD, with a source
tree build executed in contrib/unaccent:

$ touch generate_unaccent_rules.py
$ make update-unicode
generate_unaccent_rules.py --unicode-data-file
../../src/common/unicode/UnicodeData.txt --latin-ascii-file Latin-ASCII.xml
>unaccent.rules
/bin/sh: generate_unaccent_rules.py: command not found
make: *** [unaccent.rules] Error 127
make: *** Deleting file `unaccent.rules'

...so in this case it seems not to know to use CWD here.

Anyway, this can be put off until the very end, since it's not run often.
You've demonstrated how these targets would work, and that's good enough
for now.

--
John Naylor
EDB: http://www.enterprisedb.com

Commits

  1. meson: Add 'running' test setup, as a replacement for installcheck

  2. meson: Add support for building with precompiled headers

  3. windows: Adjust FD_SETSIZE via commandline define

  4. meson: docs: Add xml{lint,proc} wrapper to collect dependencies

  5. meson: ecpg: Split definition of static and shared libraries

  6. windows: Set UMDF_USING_NTSTATUS globally, include ntstatus.h

  7. ci: Add hint about downloadable logs to README

  8. meson: Set up absolute rpaths to libdir

  9. meson: Include CFLAGS/c_args in summary and pg_config output

  10. windows: remove date from version number in win32ver.rc

  11. meson: Add initial version of meson based build system

  12. ci: windows: set error mode to not include SEM_NOGPFAULTERRORBOX

  13. Refactor PG_TEST_EXTRA logic in autoconf build

  14. Split TESTDIR into TESTLOGDIR and TESTDATADIR

  15. Don't hardcode tmp_check/ as test directory for tap tests

  16. Extend gendef.pl in preparation for meson

  17. Include c.h instead of postgres.h in src/port/*p{read,write}*.c

  18. Remove DLLTOOL, DLLWRAP from configure / Makefile.global.in

  19. Run xmllint validation only once

  20. Bump minimum Perl version to 5.14

  21. Move gramparse.h to src/backend/parser

  22. Run perltidy over Catalog.pm

  23. Parse catalog .dat files as a whole when compiling the backend

  24. Build all Flex files standalone

  25. Move private declarations shared between guc.c and guc-file.l to new header

  26. Preparatory refactoring for compiling guc-file.c standalone

  27. Move darwin sysroot determination into separate file

  28. Fix MSVC warning in compat_informix/rnull.pgc

  29. solaris: Use versioning scripts instead of -Bsymbolic

  30. Change shared library installation naming on macOS

  31. regress: allow to specify directory containing expected files, for ecpg

  32. Don't add HAVE_LDAP_H HAVE_WINLDAP_H to pg_config.h

  33. Refactor dtrace postprocessing make rules

  34. Add output directory option to gen_node_support.pl

  35. Add output directory argument to generate-unicode_norm_table.pl

  36. Add output file argument to generate-errcodes.pl

  37. Add output path arg in generate-lwlocknames.pl

  38. Move snowball_create.sql creation into perl file

  39. ecpg: Output dir, source dir, stamp file argument for preproc/*.pl

  40. psql: Output dir and dependency generation for sql_help

  41. Deal with paths containing \ and spaces in basebackup_to_shell tests

  42. Remove LLVM_CONFIG from Makefile.global.in

  43. Make update-unicode target work in vpath builds

  44. Refactor DLSUFFIX handling

  45. ldap tests: Add paths for openbsd.

  46. ldap tests: Don't run on unsupported operating systems.

  47. Remove check for accept() argument types

  48. Move our p{read,write}v replacements into their own files.

  49. Adjust yywrap macro for non-reentrant scanners for MSVC.

  50. Remove any -arch switches given in ExtUtils::Embed's ldopts from our

  51. Change PL/Perl and Pg interface build to use configured compiler and

  52. Apparently, on some systems, ExtUtils::Embed and MakeMaker are slightly