SystemConfiguration.h not found when building on watchOS simulator

[dplewis]

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• I am not disclosing a vulnerability.
• I am not just asking a question.
• I have searched through existing issues.
• I can reproduce the issue with the latest versions of Parse Server and the Parse ObjC SDK.

Issue Description

This error occurs in PFReachability

SystemConfiguration is not available when building for watchOS Simulator. Consider using `#if __has_include(<SystemConfiguration/SystemConfiguration.h>)` to conditionally import this framework.

Steps to reproduce

Add Parse via SPM to the watchOS starter project and build

Solution

Implement WatchConnectivity, rewrite to ping the /health server endpoint or stub out PFReachability for watchOS.
Example: AFNetworking/AFNetworking@d184833

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[dplewis]

Closing via #1748