Missing sys/prctl.h

Please include the following in your bug report:

**Version of emscripten/emsdk:**
emcc (Emscripten gcc/clang-like replacement + linker emulating GNU ld) 3.1.24 (68a9f990429e0bcfb63b1cde68bad792554350a5)
clang version 16.0.0 (https://github.com/llvm/llvm-project 277c382760bf9575cfa2eac73d5ad1db91466d3f)
Target: wasm32-unknown-emscripten
Thread model: posix
InstalledDir: /home/anthony.liot/devtools/emsdk/upstream/bin

**Failing command line in full:**
Missing header sys/prctl.h using cmake toolchain to build a library

I was looking but it seems the header cannot be found in the sysroot, should I modify code to be emscripten compatible ?