.gitignore

@@ -1,3 +1,2 @@
-build/
 .cache/
-.ccls-cache/
+a.out

CMakeLists.txt

@@ -1,16 +0,0 @@
-cmake_minimum_required(VERSION 3.23)
-
-project(template)
-
-set(CMAKE_CXX_STANDARD 23)
-set(CMAKE_EXPORT_COMPILE_COMMANDS ON)
-
-#string(REPLACE ":" ";" INCLUDE_LIST $ENV{CMAKE_STDLIB})
-#include_directories($ENV{CMAKE_STDLIB})
-
-add_executable(template)
-
-target_sources(template
-	PRIVATE
-		main.cpp
-)

README.org

@@ -1,2 +1,16 @@
-* Nix C++ Dev Template
+* NixOS C++ Dev Template
-Basic C++ CMake template with Nix
+Having issues getting clangd to detect std header files despite clang++ and g++ having no issues. So this template/workaround solves this.
+
+I assume this is due to some wrapper script nonsense.
+
+As a workaround I use bear to generate the necessary paths/arguments to get clangd to pick these up.
+
+#+BEGIN_SRC
+bear -- clang++ main.cpp
+#+END_SRC
+
+In the generated compile_commands.json. There is a command for generating the main project but also a temporary object file.
+
+I assume this is more weird wrapper stuff (Bear does not support nixos clang wrappers)
+
+You need to move the cxx_isystem related flags as these are where the c++ stdlibs are kept. Also just rename them to isystem otherwise they dont work for whatever reason.

compile_commands.json

@@ -1 +0,0 @@
-build/compile_commands.json

compile_commands.json

@@ -0,0 +1,20 @@
+[
+  {
+    "arguments": [
+      "/run/current-system/sw/bin/clang++",
+      "-std=c++23",
+      "-resource-dir",
+      "/nix/store/k2s6xfca52n25yb8b6f58i87kszp3m7g-clang-wrapper-21.1.2/resource-root",
+      "-idirafter",
+      "/nix/store/dqgfdpr53ldqmdfmginb1z6kzslkzsdl-glibc-2.40-66-dev/include",
+      "-isystem",
+      "/nix/store/68ndh04pl2hhhizsarvzwa9cnlp7zj3d-gcc-14.3.0/include/c++/14.3.0",
+      "-isystem",
+      "/nix/store/68ndh04pl2hhhizsarvzwa9cnlp7zj3d-gcc-14.3.0/include/c++/14.3.0/x86_64-unknown-linux-gnu",
+      "-c",
+      "main.cpp"
+    ],
+    "directory": "/home/cspark/Projects/CPP/hello_world",
+    "file": "/home/cspark/Projects/CPP/hello_world/main.cpp"
+  }
+]

default.nix

@@ -1,14 +0,0 @@
-with (import <nixpkgs> {});
-
-clangStdenv.mkDerivation {
-	name = "template";
-	nativeBuildInputs = with pkgs; [
-		cmake
-
-		clang-tools
-		clang
-	];
-
-	# Workaround as Clangd cannot see std header files, so include set of files manually just for Clangd
-	CXXFLAGS = "-isystem${pkgs.gcc.cc}/include/c++/14.3.0 -isystem${pkgs.gcc.cc}/include/c++/14.3.0/x86_64-unknown-linux-gnu -isystem${pkgs.glibc.dev}/include";
-}

main.cpp

@@ -1,6 +1,6 @@
 #include <iostream>
+#include <print>
 
 int main() {
-	std::cout << "Hello, world!" << std::endl;
+	std::println("Hello, world!");
 }
-

run.sh

@@ -1,7 +1,7 @@
 #!/bin/sh
 
-cmake -B build --fresh
+rm a.out
 
-cmake --build build
+clang++ -std=c++23 main.cpp
 
-./build/discern
+./a.out