@leroysheep / Socializer / commits / 6fb1d819b7

reftable/stack: fix compiler warning due to missing braces

While perfectly legal, older compiler toolchains complain when zero-initializing structs that contain nested structs with `{0}`: /home/libgit2/source/deps/reftable/stack.c:862:35: error: suggest braces around initialization of subobject [-Werror,-Wmissing-braces] struct reftable_addition empty = REFTABLE_ADDITION_INIT; ^~~~~~~~~~~~~~~~~~~~~~ /home/libgit2/source/deps/reftable/stack.c:707:33: note: expanded from macro 'REFTABLE_ADDITION_INIT' #define REFTABLE_ADDITION_INIT {0} ^ We had the discussion around whether or not we want to handle such bogus compiler errors in the past already [1]. Back then we basically decided that we do not care about such old-and-buggy compilers, so while we could fix the issue by using `{{0}}` instead this is not the preferred way to handle this in the Git codebase. We have an easier fix though: we can just drop the macro altogether and handle initialization of the struct in `reftable_stack_addition_init()`. Callers are expected to call this function already, so this change even simplifies the calling convention. [1]: https://lore.kernel.org/git/20220710081135.74964-1-sunshine@sunshineco.com/T/ Suggested-by: Carlo Arenas <carenas@gmail.com> Signed-off-by: Patrick Steinhardt <ps@pks.im> Signed-off-by: Junio C Hamano <gitster@pobox.com>

Patrick Steinhardt committed Aug 12, 2025 at 11:54 UTC 6fb1d819b7c7796e7cfaae44f056d73436469efc

1 file changed +7 -7

reftable/stack.c

+7 -7

index ed80710572..9db90cf4ed 100644 --- a/reftable/stack.c +++ b/reftable/stack.c @@ -664,8 +664,6 @@ struct reftable_addition { uint64_t next_update_index; }; -#define REFTABLE_ADDITION_INIT {0} - static void reftable_addition_close(struct reftable_addition *add) { struct reftable_buf nm = REFTABLE_BUF_INIT; @@ -693,6 +691,7 @@ static int reftable_stack_init_addition(struct reftable_addition *add, struct reftable_buf lock_file_name = REFTABLE_BUF_INIT; int err; + memset(add, 0, sizeof(*add)); add->stack = st; err = flock_acquire(&add->tables_list_lock, st->list_file, @@ -739,8 +738,10 @@ static int stack_try_add(struct reftable_stack *st, void *arg), void *arg) { - struct reftable_addition add = REFTABLE_ADDITION_INIT; - int err = reftable_stack_init_addition(&add, st, 0); + struct reftable_addition add; + int err; + + err = reftable_stack_init_addition(&add, st, 0); if (err < 0) goto done; @@ -866,19 +867,18 @@ int reftable_stack_new_addition(struct reftable_addition **dest, struct reftable_stack *st, unsigned int flags) { - int err = 0; - struct reftable_addition empty = REFTABLE_ADDITION_INIT; + int err; REFTABLE_CALLOC_ARRAY(*dest, 1); if (!*dest) return REFTABLE_OUT_OF_MEMORY_ERROR; - **dest = empty; err = reftable_stack_init_addition(*dest, st, flags); if (err) { reftable_free(*dest); *dest = NULL; } + return err; }