Update to llvm-18.1.1

NEWS.md

@@ -28,7 +28,7 @@
 
 * The `captureR()` method now captures plots generated by the canvas graphics device by default. Captured plots are returned as an array of `ImageBitmap` objects in the property `images`. The previous behaviour may be restored either by manually starting a non-capturing `webr::canvas()` device during execution, or by including `captureGraphics: false` as part of the `options` argument. The default options for `evalR()` are set so that plotting is not captured, retaining the current behaviour.
 
-* Upgraded the base LLVM distribution from LLVM 14 to LLVM 17, rebasing our Fortran for WebAssembly patches on the latest release of LLVM at time of writing (v17.0.6). The LLVM Fortran compiler binary name is now `flang-new` and webR's build scripts have been updated to reflect this. The `emfc` wrapper script is no longer required, but for the moment the Make variable pointing to the `flang-new` compiler is still named `EMFC` for backwards compatibility.
+* Upgraded the base LLVM distribution from LLVM 14 to LLVM 18, rebasing our Fortran for WebAssembly patches on the latest release of LLVM at time of writing (v18.1.1). The LLVM Fortran compiler binary name is now `flang-new` and webR's build scripts have been updated to reflect this. The `emfc` wrapper script is no longer required, but for the moment the Make variable pointing to the `flang-new` compiler is still named `EMFC` for backwards compatibility.
 
 * The LLVM flang build scripts are now sourced using a git submodule, to simplify management of CI builds. The build scripts are available at https://github.com/r-wasm/flang-wasm and the patched LLVM source at https://github.com/r-wasm/llvm-project. This allows for an independent build of the patched LLVM flang for WebAssembly, including as a separate Nix package.