SwiftNIO fails to build on Xcode 16.3: Import of C++ module 'std_stdint_h' appears within extern "C" language linkage specification

[akyrola]

Expected behavior

Build to succeed.

Actual behavior

Xcode build fails with:
c_nio_llhttp.h: Import of C++ module 'std_stdint_h' appears within extern "C" language linkage specification

Steps to reproduce

Build in Xcode. This worked just few days ago (prior to Xcode update).

If possible, minimal yet complete reproducer code (or URL to code)

[anything to help us reproducing the issue]

SwiftNIO version/commit hash

[the SwiftNIO tag/commit hash]
2.81.0

System & version information

Xcode 16.3
Max OS 15.3.2 (24D81)