[env] RUST_TEST_THREADS = "1" # macOS 26 (Tahoe) moved libc++ headers inside the SDK; Apple clang 17 no longer # finds them at the old search path. Scope the workaround to Apple targets so a # Linux stealth build never inherits a macOS SDK include flag. cc-rs recognizes # the target-suffixed CXXFLAGS variables below. See issue #136. CXXFLAGS_aarch64_apple_darwin = { value = "-isystem /Library/Developer/CommandLineTools/SDKs/MacOSX.sdk/usr/include/c++/v1", force = false } CXXFLAGS_x86_64_apple_darwin = { value = "-isystem /Library/Developer/CommandLineTools/SDKs/MacOSX.sdk/usr/include/c++/v1", force = false }