isLinuxCppModule function
Returns true when the spec file uses direct C++ for Linux. A Linux-C++
module always gets a linux/src/HybridXxx.cpp starter stub created (see
linkLinuxCppImplStubs) — whether it's actually USED instead of the
shared src/HybridXxx.cpp is a separate, opt-in decision driven by file
content (see hasCustomPlatformImpl), independent of Windows.
Implementation
bool isLinuxCppModule(File specFile) => PlatformTargetAnalyzer.fromSpec(specFile).supportsLinux;