Add vscode LSP support

.vscode/c_cpp_properties.json

@@ -0,0 +1,15 @@
+{
+    "configurations": [
+      {
+        "name": "Linux",
+        "includePath": [
+          "${workspaceFolder}/**",
+          "${env:C_INCLUDE_PATH}"
+        ],
+        "defines": [],
+        "cStandard": "c11",
+        "intelliSenseMode": "linux-gcc-x64"
+      }
+    ],
+    "version": 4
+  }

.vscode/settings.json

@@ -0,0 +1,5 @@
+{
+    "files.associations": {
+        "*.h": "c"
+    }
+}

flake.nix

@@ -14,16 +14,17 @@
     let
       pkgs = import nixpkgs { inherit system; };
 
-      linux_dev = pkgs.linuxKernel.kernels.linux_zen.dev;
+      linux = pkgs.linuxKernel.kernels.linux_zen;
     in {
       devShells = {
         default = pkgs.mkShell {
-          packages = [ linux_dev ];
+          packages = [ linux.moduleBuildDependencies ];
 
-          LINUX_MODULES_FOLDER = "${linux_dev}/lib/modules/${linux_dev.modDirVersion}";
+          LINUX_MODULES_FOLDER = "${linux.dev}/lib/modules/${linux.modDirVersion}";
+          C_INCLUDE_PATH = "${linux.dev}/lib/modules/${linux.modDirVersion}/source/include";
 
           shellHook = ''
-            echo "Current Linux Kernel used : ${linux_dev.version}"
+            echo "Current Linux Kernel used : ${linux.version}"
           '';
         };
       };