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Re: [PATCH 3/5] reftable/stack: fix compiler warning due to missing braces

From
Patrick Steinhardt <ps@pks.im>
Date
Aug 4, 2025, 06:03 UTC
Message-ID
<aJBNHzE3RQBZZTcU@pks.im>
In-Reply-To
<CAPig+cSeYUenjTm54higv6ANCOw0RJsF1hevS_p71=sH3c+E+Q@mail.gmail.com>
On Fri, Aug 01, 2025 at 03:19:52PM -0400, Eric Sunshine wrote:
Show 23 quoted lines
> On Fri, Aug 1, 2025 at 10:48 AM Patrick Steinhardt <ps@pks.im> wrote:
> > While perfectly legal, older compiler toolchains complain when
> > zero-initializing structs that contain nested structs with `{0}`:
> > [...]
> > Silence this warning by using `{{0}}` instead.
> >
> > Signed-off-by: Patrick Steinhardt <ps@pks.im>
> > ---
> > diff --git a/reftable/stack.c b/reftable/stack.c
> > -#define REFTABLE_ADDITION_INIT {0}
> > +#define REFTABLE_ADDITION_INIT {{0}}
> 
> For what it's worth, the last time this sort of issue came up[*], I
> believe the ultimate response was that the project ought not pander to
> this particular instance of buggy compiler and that, instead, an
> individual developer should, if bothered by the warning, use the
> appropriate compiler option to suppress the warning. Whether or not
> that attitude should apply also to the reftable code which is meant to
> be shareable, is a separate question, but at least that previous
> discussion thread provides some background regarding how different
> developers feel or felt about the issue.
> 
> [*]: https://lore.kernel.org/git/20220710081135.74964-1-sunshine@sunshineco.com/T/

Yeah, in general I'm also of the opinion that we shouldn't bother. But in libgit2 we have pipelines that use such older compilers, and we don't want to drop those for now. So I think we should treat the reftable library specially, doubly so as this is the only instance that causes problems.

Thanks for digging up that old thread!
Patrick
Previous: Eric SunshineNext: Junio C Hamano
Message 6 of 52 in “reftable: a couple of improvements for libgit2”
  1. 0/5 reftable: a couple of improvements for libgit2Patrick Steinhardt, Aug 1, 2025
  2. 1/5 reftable/writer: fix type used for number of recordsPatrick Steinhardt, Aug 1, 2025
  3. 2/5 reftable/writer: drop Git-specific `QSORT()` macroPatrick Steinhardt, Aug 1, 2025
  4. 3/5 reftable/stack: fix compiler warning due to missing bracesPatrick Steinhardt, Aug 1, 2025
  5. Eric SunshineAug 1, 2025
  6. Patrick SteinhardtAug 4, 2025
  7. Junio C HamanoAug 4, 2025
  8. Patrick SteinhardtAug 5, 2025
  9. Carlo ArenasAug 12, 2025
  10. Patrick SteinhardtAug 12, 2025
  11. Junio C HamanoAug 12, 2025
  12. 4/5 reftable/stack: reorder code to avoid forward declarationsPatrick Steinhardt, Aug 1, 2025
  13. 5/5 reftable/stack: allow passing flags to `reftable_stack_add()`Patrick Steinhardt, Aug 1, 2025
  14. 0/6 reftable: a couple of improvements for libgit2Patrick Steinhardt, Aug 4, 2025
  15. 1/6 reftable/writer: fix type used for number of recordsPatrick Steinhardt, Aug 4, 2025
  16. 2/6 reftable/writer: drop Git-specific `QSORT()` macroPatrick Steinhardt, Aug 4, 2025
  17. 3/6 reftable/stack: fix compiler warning due to missing bracesPatrick Steinhardt, Aug 4, 2025
  18. 4/6 reftable/stack: reorder code to avoid forward declarationsPatrick Steinhardt, Aug 4, 2025
  19. Justin ToblerAug 11, 2025
  20. 5/6 reftable/stack: allow passing flags to `reftable_stack_add()`Patrick Steinhardt, Aug 4, 2025
  21. Justin ToblerAug 11, 2025
  22. Patrick SteinhardtAug 12, 2025
  23. 6/6 reftable/stack: handle outdated stacks when compactingPatrick Steinhardt, Aug 4, 2025
  24. Justin ToblerAug 11, 2025
  25. Patrick SteinhardtAug 12, 2025
  26. 0/8 reftable: a couple of improvements for libgit2Patrick Steinhardt, Aug 12, 2025
  27. 1/8 reftable/writer: fix type used for number of recordsPatrick Steinhardt, Aug 12, 2025
  28. 2/8 reftable/writer: drop Git-specific `QSORT()` macroPatrick Steinhardt, Aug 12, 2025
  29. 3/8 reftable/stack: reorder code to avoid forward declarationsPatrick Steinhardt, Aug 12, 2025
  30. 4/8 reftable/stack: fix compiler warning due to missing bracesPatrick Steinhardt, Aug 12, 2025
  31. Justin ToblerAug 12, 2025
  32. 5/8 reftable/stack: allow passing flags to `reftable_stack_add()`Patrick Steinhardt, Aug 12, 2025
  33. Justin ToblerAug 12, 2025
  34. Patrick SteinhardtAug 13, 2025
  35. 6/8 reftable/stack: handle outdated stacks when compactingPatrick Steinhardt, Aug 12, 2025
  36. 7/8 reftable: don't second-guess errors from flock interfacePatrick Steinhardt, Aug 12, 2025
  37. Justin ToblerAug 12, 2025
  38. 8/8 refs/reftable: always reload stacks when creating lockPatrick Steinhardt, Aug 12, 2025
  39. Justin ToblerAug 12, 2025
  40. Carlo ArenasAug 12, 2025
  41. Patrick SteinhardtAug 13, 2025
  42. Junio C HamanoAug 13, 2025
  43. 0/8 reftable: a couple of improvements for libgit2Patrick Steinhardt, Aug 13, 2025
  44. 1/8 reftable/writer: fix type used for number of recordsPatrick Steinhardt, Aug 13, 2025
  45. 2/8 reftable/writer: drop Git-specific `QSORT()` macroPatrick Steinhardt, Aug 13, 2025
  46. 3/8 reftable/stack: reorder code to avoid forward declarationsPatrick Steinhardt, Aug 13, 2025
  47. 4/8 reftable/stack: fix compiler warning due to missing bracesPatrick Steinhardt, Aug 13, 2025
  48. 5/8 reftable/stack: allow passing flags to `reftable_stack_add()`Patrick Steinhardt, Aug 13, 2025
  49. 6/8 reftable/stack: handle outdated stacks when compactingPatrick Steinhardt, Aug 13, 2025
  50. 7/8 reftable: don't second-guess errors from flock interfacePatrick Steinhardt, Aug 13, 2025
  51. 8/8 refs/reftable: always reload stacks when creating lockPatrick Steinhardt, Aug 13, 2025
  52. Justin ToblerAug 13, 2025

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