Horton

Re: [RFC] building postgres with meson

Aleksander Alekseev <aleksander@timescale.com>

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From: Aleksander Alekseev <aleksander@timescale.com>
To: Andres Freund <andres@anarazel.de>
Cc: PostgreSQL Development <pgsql-hackers@postgresql.org>, Tom Lane <tgl@sss.pgh.pa.us>
Date: 2022-06-02T12:34:23Z
Lists: pgsql-hackers 
Hi Andres,

> Cool. I think I pushed a fix/workaround for the issue now. Still can't decide
> whether it's apple's or meson's fault.

Many thanks! The fix solved the problem, I can compile with -Dldap=enabled now.
The code passes the tests too.

> > $ meson configure -Dldap=disabled
> > $ meson configure -Dssl=openssl
> > $ meson configure -Dprefix=/Users/eax/pginstall
>
> FYI, you can set multiple options in one go ;)

Thanks! ;)

> Makes sense. Currently we don't fill the --configure thing, because there
> configure wasn't used. We could try to generate something compatible from
> meson options, but I'm not sure that's a good plan.

If pg_config output was 100% backward compatible with Autotools one, that would
simplify the lives of the extension developers for sure. However, considering
that at PGCon we agreed that both Autotools and Meson will be maintained for
several releases, personally I wouldn't say that this compatibility is
necessary, nor is it realistically deliverable. Nevertheless, IMO there should
be a stable and documented way to determine the PostgreSQL version (this can be
done with `pg_config --version` for both Autotools and Meson), the build tool
used (no way to determine) and the build options (no way to determine
for Meson).

> I suspect the errors might be due to CC/CPPFLAGS/... not being defined. I can
> try to make it output something roughly compatible with the old output, for
> most of those I already started to compute values for the PGXS compat stuff I
> was hacking on recently.

Yes, that could explain the problem. Just for the record, I get several errors
regarding src/export.h in TimescaleDB code [1]:

```
/Users/eax/projects/c/timescaledb/src/export.h:26:5: error: pasting formed
  ')87628', an invalid preprocessing token [clang-diagnostic-error]
#if TS_EMPTY(PGDLLEXPORT)
             ^
/Users/eax/projects/c/timescaledb/src/export.h:17:22: note: expanded from
  macro 'TS_EMPTY'
#define TS_EMPTY(x) (TS_CAT(x, 87628) == 87628)
                     ^
/Users/eax/projects/c/timescaledb/src/export.h:15:23: note: expanded from
  macro 'TS_CAT'
#define TS_CAT(x, y) x##y
                      ^
/Users/eax/projects/c/timescaledb/src/export.h:26:14: error: function-like
  macro '__attribute__' is not defined [clang-diagnostic-error]
#if TS_EMPTY(PGDLLEXPORT)
             ^
/Users/eax/pginstall/include/postgresql/server/c.h:1339:21: note: expanded
  from macro 'PGDLLEXPORT'
#define PGDLLEXPORT __attribute__((visibility("default")))
                    ^
/Users/eax/projects/c/timescaledb/src/export.h:30:2: error: "PGDLLEXPORT is
  already defined" [clang-diagnostic-error]
#error "PGDLLEXPORT is already defined"
 ^
1 warning and 3 errors generated.
Error while processing /Users/eax/projects/c/timescaledb/src/extension.c
```

[1]: https://github.com/timescale/timescaledb/blob/main/src/export.h

-- 
Best regards,
Aleksander Alekseev

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