Horton

Re: Cleaning up historical portability baggage

Andres Freund <andres@anarazel.de>

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From: Andres Freund <andres@anarazel.de>
To: Thomas Munro <thomas.munro@gmail.com>
Cc: Tom Lane <tgl@sss.pgh.pa.us>, pgsql-hackers <pgsql-hackers@postgresql.org>
Date: 2022-08-07T02:57:22Z
Lists: pgsql-hackers 
Hi,

On 2022-08-07 14:29:20 +1200, Thomas Munro wrote:
> On Sun, Aug 7, 2022 at 1:29 PM Andres Freund <andres@anarazel.de> wrote:
> > 0001: __func__ is C99, so we don't need to support fallbacks
> 
> +1, and my scraped data agrees.
> 
> I believe our minimum MSVC is current 2015, and this says it has it
> (it doesn't let you select older versions in the version drop-down,
> but we don't care about older versions):

Thanks for checking.


> > 0002: windows: We've unconditionally defined HAVE_MINIDUMP_TYPE for msvc forever, we
> >   can rely on it for mingw too
> 
>       * If supported on the current platform, set up a handler to be called if
>       * the backend/postmaster crashes with a fatal signal or exception.
>       */
> -#if defined(WIN32) && defined(HAVE_MINIDUMP_TYPE)
> +#if defined(WIN32)
> 
> Personally I'd remove "If supported on the current platform, " and
> shove the rest of the comment inside the #if defined(WIN32), but
> that's just me...

I started out that way as well, but it'd actually be nice to do this on other
platforms too, and we just don't support it yet :)


> >   I checked and the relevant options (-shared, -Wl,-Bsymbolic, -Wl,-soname)
> >   work even on solaris 10 with developerstudio12.5 (not the latest)
> 
> FWIW I'd call Solaris 10 EOL'd (it's in some
> sure-pay-us-but-we-aren't-really-going-to-fix-it phase with a lifetime
> similar to the actual sun).

I'd agree - but checked so that couldn't even be an argument against :)


Greetings,

Andres Freund

Commits

  1. Make sure IOV_MAX is defined.

  2. Doc: Abstract AF_UNIX sockets don't work on Windows.

  3. Clean up inconsistent use of fflush().

  4. Remove configure probe for sockaddr_in6 and require AF_INET6.

  5. Remove configure probes for sockaddr_storage members.

  6. Remove configure probe for netinet/tcp.h.

  7. Fix macro problem with gai_strerror on Windows.

  8. Remove configure probe for net/if.h.

  9. mstcpip.h is not missing on MinGW.

  10. Remove dead ifaddr.c fallback code.

  11. Remove configure probe for gethostbyname_r.

  12. Remove replacement code for getaddrinfo.

  13. Remove configure probe for struct sockaddr_storage.

  14. Remove HAVE_UNIX_SOCKETS.

  15. Remove configurability of PPC spinlock assembly code.

  16. Remove configure probe for shl_load library.

  17. Remove configure probe for sys/select.h.

  18. Remove configure probes for sys/un.h and struct sockaddr_un.

  19. Remove configure probes for sys/ipc.h, sys/sem.h, sys/shm.h.

  20. Remove configure probe for sys/resource.h and refactor.

  21. Remove configure probe for sys/uio.h.

  22. Fix obsolete comments in instr_time.h.

  23. aix: fix misreading of condition in 8f12a4e7add

  24. aix: Remove checks for very old OS versions

  25. windows: Remove HAVE_MINIDUMP_TYPE test

  26. solaris: Remove unnecessary gcc / gnu ld vs sun studio differences

  27. Trust a few system headers to stand on their own

  28. Rely on __func__ being supported

  29. Simplify replacement code for strtof.

  30. Simplify gettimeofday for Windows.

  31. Simplify gettimeofday() fallback logic.

  32. Remove fallbacks for strtoll, strtoull.

  33. Remove configure probe for fdatasync.

  34. Remove configure probe for clock_gettime.

  35. Simplify replacement code for preadv and pwritev.

  36. Remove dead pread and pwrite replacement code.

  37. Remove dead setenv, unsetenv replacement code.

  38. Remove configure probes for poll and poll.h.

  39. Remove configure probe for link.

  40. Remove configure probes for symlink/readlink, and dead code.

  41. Remove configure probe for setsid.

  42. Remove configure probe for shm_open.

  43. Remove configure probe and related tests for getrlimit.

  44. Remove configure probe for dlopen, and refactor.

  45. Remove dead getpwuid_r replacement code.

  46. Remove dead handling for pre-POSIX sigwait().

  47. Remove dead getrusage replacement code.

  48. Cygwin and Mingw floating-point fixes.

  49. Support platforms where strtoll/strtoull are spelled __strtoll/__strtoull.

  50. Arrange to supply declarations for strtoll/strtoull if needed.

  51. Lock down regression testing temporary clusters on Windows.

  52. Secure Unix-domain sockets of "make check" temporary clusters.

  53. Add configure checks for strtoll, strtoull (or strto[u]q). Disable

  54. Portability fix for old SunOS releases: fflush(NULL)