MSC compile warnings

[torsten48]

What version of protobuf and what language are you using?
28.0-rc2
Language: C++/

What operating system (Linux, Windows, ...) and version?
Windows 10

What runtime / compiler are you using (e.g., python version or gcc version)
MSVC 19.40.33811.0 (64bit)
Windows SDK 10.0.22621.0
cmake 3.30.2

What did you do?
Steps to reproduce the behavior:
build protobuf via cmake

What did you expect to see
no warnings

What did you see instead?
protobuf\third_party\utf8_range\utf8_range.c(38): warning C4141: 'inline': used more than once
protobuf\third_party\utf8_range\utf8_range.c(45): warning C4141: 'inline': used more than once
protobuf\third_party\utf8_range\utf8_range.c(49): warning C4141: 'inline': used more than once
protobuf\third_party\utf8_range\utf8_range.c(178): warning C4141: 'inline': used more than once
protobuf\upb\mem\arena.c(327): warning C4116: unnamed type definition in parentheses
protobuf\src\google\protobuf\wire_format_lite.cc(669): warning C4068: unknown pragma 'clang'
protobuf\src\google\protobuf\wire_format_lite.cc(711): warning C4068: unknown pragma 'clang'

Make sure you include information that can help us debug (full error message, exception listing, stack trace, logs).

Anything else we should know about your project / environment

[bebuch]

MSVC issues a warning here because both __forceinline and inline are declared.

@grpc-devs: Is changing PROTOBUF_ALWAYS_INLINE from __forceinline to [[msvc::forceinline]] an option? This should solve the issue.

[googleberg]

@ericsalo can you see if theres a straightforward fix for this?