Unable to compile Realm when targetting watchOS

[mwoollard]

How frequently does the bug occur?

All the time

Description

Am using Realm integrated in a pure SPM library project that targets iOS, tvOS macOS and watchOS. With latest update of packages can no longer build for watchOS. The error is:

.../simulated_failure.cpp:174:1: error: thread-local storage is not supported for the current target
thread_local bool (*s_mmap_predicate)(size_t);
^
1 error generated.

Stacktrace & log output

No response

Can you reproduce the bug?

Yes, always

Reproduction Steps

Sample project is available here

clone project
from project root directory

$ open Package.swift

In xcode select watchOS as run target

Build

Version

10.21.1

What SDK flavour are you using?

Local Database only

Are you using encryption?

Yes, using encryption

Platform OS and version(s)

watchOS 7.4. up

Build environment

Xcode version: 13.2.1
Dependency manager and version: Xcode SPM (swift 5.5.2)

[leemaguire]

Hi @mwoollard. I still cannot reproduce your issue even with the sample project. Are you using macOS Monterey?

[mwoollard]

Yes, using Monterey, am also seeing this both on my dev laptop (M1) within Xcode and CI scripted builds (Intel).

[mwoollard]

Additional, FWIW, if I change the compile time condition @ line 171 to

#if (REALM_ARCHITECTURE_X86_32 && REALM_IOS) || REALM_WATCHOS

Code compiles

[dianaafanador3]

Thanks for the suggestion, I created a PR for it on core. You can keep track of the issue here and on the PR realm/realm-core#5188.

[dianaafanador3]

This has been fixed on core and will be available shortly.

[stremblayiOS]

This is still happening using SPM and Realm 10.24.0. Can we reopen this please?

[dianaafanador3]

@streamblayiOS Are you still getting the same error?

[stremblayiOS]

yes

[mwoollard]

I think this is now only issue when targeting M1 simulator. I created new issue in realm-core here. Could you confirm you are using M1 Mac?

[stremblayiOS]

I am not using a M1 Mac.

[mwoollard]

I'm able to build on our Intel CI system with the latest release where I wasn't before, but still can't on my M1 laptop, so must be something more subtle.

[stremblayiOS]

This is what I get when I try to add Realm to an watch extension using SPM

[ding-stephen]

The same issue for my project with the latest Realm 10.24.2 on my Intel Mac.
But the problem is only happened on the simulators, not when testing on actual device.

[dianaafanador3]

I have a core PR for this, where I'm trying to cover all issues where thread_local is not supported, this is the branch, if you want to test out. @ding-stephen

[philipengberg]

@dianaafanador3 Facing the same issue, I can confirm that your branch fixed the issue for me (on WatchOS). Any plans to merge these changes?