add devenv and devcontainer to manage environmnet

CCPP.nix

@@ -0,0 +1,37 @@
+{
+  config,
+  pkgs,
+  lib,
+  ...
+}: {
+  # Add packages to the dev environment
+  packages = with pkgs; [
+    # C/C++
+    xmake
+    gnumake
+    cmake
+    ninja
+    # gcc
+    gcc_multi
+    neocmakelsp
+    clang-tools
+  ];
+
+  # Enable languages support
+  # languages.cplusplus.enable = true;
+  env = {
+    NIX_LD_LIBRARY_PATH = with pkgs;
+      lib.makeLibraryPath [
+        # stdenv_32bit.cc.cc
+        glibc_multi
+      ];
+    NIX_LD = with pkgs; lib.fileContents "${stdenv_32bit.cc}/nix-support/dynamic-linker";
+  };
+
+  # When enter shell, exec ...
+  enterShell = ''
+    export LD_LIBRARY_PATH=$NIX_LD_LIBRARY_PATH
+    export LD=$NIX_LD
+    gcc --version
+  '';
+}