NetBeans 15 - C++ development (CCLS, GCC)

I want to start C++ development with NetBeans 15, on Lubuntu Kinetic Kudu (22.10).

I installed first build-essential

sudo apt install build-essentialg++ --versiong++ (Ubuntu 12.2.0-1ubuntu1) 12.2.0gcc --versiongcc (Ubuntu 12.2.0-1ubuntu1) 12.2.0

When selecting Tools > Options > C/C++ it says that either ccls or the clangd language protocol servers are needed.

I installed ccls

sudo apt install cclsccls --versionUbuntu ccls version 0.20220729-1clang version 14.0.6-2

Not sure if I should have installed clangd instead or in addition to ccls.

Now when I start NetBeans 15 choosing the C/C++ option it automatically selected the path to ccls

/usr/bin/ccls

Now I wanted to start a first Hello World C++ project, but somehow it looks complicated.

I would like to use the highest possible C++ standard version. The installed build-essential comes with version 12.2, and here for example https://gcc.gnu.org/onlinedocs/12.2.0/ I assume that for C++ it supports Standard 20 or even higher. I looked into it the very first time.

1. Choose Project: File > New Project > C/C++> Lightweight C/C++ Project2. Location: Project Path    I created a new folder myfirstcpp in /home/me/NetBeansProjects and selected it on this step.3. Editor: Compile Commands   Here no clue what to specify.    I leave it empty and proceed.4. Build: "Configuration Name", "Build", "Clean" and "Run"   Here no clue what to specify.    I leave it empty and proceed.

The project is created but completely empty, no artifact created upfront.

I created a CPP file and copied the following code from the web

// C++ program to display "Hello World"// Header file for input output functions#include <iostream>using namespace std;// Main() function: where the execution of program beginsint main(){    // prints hello world    cout << "Hello World";    return 0;}

But the editor shows a yellow warning triangle stating compile commands not configured. Also no option to run that simple Hello World programm, every Run option is greyed out.

Obviously I have to configure steps 3-4 properly.How?

Update on @skomisa comment

I found that post before, but placing a .ccls file with the exact same content

/home/me/NetBeansProjects/myfirstcpp/.ccls:g++-xc++-Iinclude-std=c++17

didn't change anything. Now I tried again, and after clicking around in the Project Properties in the Editor category by removing and adding the path /home/me/NetBeansProjects/myfirstcpp/.ccls to the .ccls file, switching into the Build category without changing anything, all of a sudden the Run options were active.

Weired, looks buggy to me... also when I closed NetBeans, restarted, everything was again greyed out, until I clicked around again in the Project Properties until the Run options appeared active.

However, when I clicked the Run Project (myfirstcpp) option I got this exception in the Output window

Exception in thread "main" java.io.IOException: Cannot run program "": error=2, No such file or directory    at java.base/java.lang.ProcessBuilder.start(ProcessBuilder.java:1143)    at java.base/java.lang.ProcessBuilder.start(ProcessBuilder.java:1073)    at org.netbeans.modules.cpplite.project.runner.Runner.main(Runner.java:35)Caused by: java.io.IOException: error=2, No such file or directory    at java.base/java.lang.ProcessImpl.forkAndExec(Native Method)    at java.base/java.lang.ProcessImpl.<init>(ProcessImpl.java:315)    at java.base/java.lang.ProcessImpl.start(ProcessImpl.java:245)    at java.base/java.lang.ProcessBuilder.start(ProcessBuilder.java:1110)    ... 2 more

Either the content in the .ccls file is not correct or incomplete, or in addition the Build category has to be configured too.

I use OpenJDK

java --version                                                                                                                                    openjdk 18.0.2.1 2022-08-18                                                                                                                                                        OpenJDK Runtime Environment (build 18.0.2.1+1-1)                                                                                                                                   OpenJDK 64-Bit Server VM (build 18.0.2.1+1-1, mixed mode, sharing)

if this is relevant.