Deep component analysis

Build system adaptation strategies:

Some build systems, like CMake, support conditional statements, and the project build configuration files may define platform-specific sections.

Before porting, conduct a thorough audit of the following:

  1. System libraries (e.g., glibc, QNX uses libc or musl in some cases).

  2. Kernel features (e.g., epoll(), QNX uses poll(), select(), or devctl() for event handling).

  3. System Calls: Replace Linux-specific calls (e.g., fork(), vfork()) with QNX equivalents (spawn() is often preferred)).

  4. Third-party libraries (e.g., openssl, zlib, libcurl – ensure QNX-compatible versions exist).

  5. Threading model: QNX has strong POSIX thread support, but some Linux-specific threading calls may need adjustment.

  6. Macro conflicts: Define _QNX_SOURCE, _POSIX_C_SOURCE, or _XOPEN_SOURCE to expose QNX APIs.

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