Patch linux-raw-sys and rustix

Author: antoyo

.github/workflows/nightly_rustc.yml

@@ -83,7 +83,23 @@ jobs:
         mkdir -p $dir
         mv libgccjit-${{ matrix.arch.cross_target }}.so $dir/libgccjit.so
 
-    # TODO: patch linux-raw-sys and rustix.
+    - name: Patch linux-raw-sys and rustix.
+      if: ${{ matrix.arch.cross_target != '' }}
+      run: |
+        toml='
+        [patch.crates-io]
+        linux-raw-sys = { git = "https://github.com/antoyo/linux-raw-sys", branch = "m68k-support" }
+        rustix = { git = "https://github.com/antoyo/rustix", branch = "m68k-support" }
+        '
+        cd rust
+        echo $toml >> Cargo.toml
+        echo $toml >> compiler/rustc_codegen_gcc/Cargo.toml
+
+        cargo update -p rustix
+        cd compiler/rustc_codegen_gcc/
+        cargo update -p rustix
+
+        cargo tree -i linux-raw-sys 2>&1 | rg "was not used in the crate graph" && (echo "Unused patches found"; cargo tree; exit 1)
 
     - name: Compile rustc
       run: |