error: call to undeclared function '_upb_MiniTable_GetSubByIndex'; ISO C99 and later do not support implicit function declarations

[calvin2021y]

What version of protobuf and what language are you using?

today main branch: https://github.com/protocolbuffers/protobuf/commit/de29e3c9aeff8b85913f6bd1a2395e303f932ab4

_upb_MiniTable_GetSubByIndex is not exists from source code(grep search not find), but still call from https://github.com/protocolbuffers/protobuf/blob/main/upb/wire/internal/decode_fast.c#L918

[calvin2021y]

after _upb_MiniTable_GetSubByIndex => _upb_MiniTable_GetSubTableByIndex:

error: passing 'const struct upb_MiniTable' to parameter of incompatible type 'union upb_MiniTableSub'

[calvin2021y]

https://github.com/protocolbuffers/protobuf/commit/85c7cc24e0084a3beda37b848e7037f8f09c6850

@haberman

[calvin2021y]

hi @haberman @zhangskz

Today I try master branch b1c0715, still get this error.

Any comment how to fix this ?

[haberman]

How are you building protobuf?

The decode_fast.c file is not enabled in any of our normal builds (Bazel, CMake, etc). Are you using a custom build setup?

[calvin2021y]

I use bazel:

bazel build //upb:gen_amalgamation
clang bazel-bin/upb/upb.c bazel-bin/upb/upb.h -DUPB_FASTTABLE_ENABLED -DUPB_ENABLE_FASTTABLE -c

The upb_MiniTable from .upb_minitable.c still has the fast field, that is why I build with FASTTABLE

decode_fast/encode_fast will be removed ? or temporarily unavailable?

[haberman]

decode_fast/encode_fast will be removed ? or temporarily unavailable?

decode_fast is currently unmaintained. If and when there is a use case that needs the extra parsing speed (and can tolerate the larger code size), we may bring it back.

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