CODEWITHSUNDEEP
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neblaz
neblaz

Reputation: 753

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-essential

g++ --version
g++ (Ubuntu 12.2.0-1ubuntu1) 12.2.0

gcc --version
gcc (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 ccls

ccls --version
Ubuntu ccls version 0.20220729-1
clang 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++ Project
2. 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 begins
int 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.

Upvotes: 6

Views: 5082

Answers (2)

djati
djati

Reputation: 1

I don't know if you have resolved this issue or not, but i had same problem and here is what i did to fix this.

You already installed build-essentials, so i assume you already installed gdb and cmake too.

  • install ccls and clangd (i don't know if this is necessary, but netbeans seems require them)

    sudo apt install ccls clangd

  • Open the project or create a new one

  • Right click under your project then select Properties

  • Under the Build Categories fill up the Build form with g++ your_file.cpp my file is main.cpp so i write g++ main.cpp

  • Build your project. Now an output file was added to your project. mine is a.out

  • Go back to Project Properties and add that a.out to Build > Run with ./ in front of it. ./a.out

my Project Properties snapshot

Now try to run the project and see the Output below.

Upvotes: 0

Ping Chia
Ping Chia

Reputation: 81

Just installed NB15 on Ubuntu 22.04 and running C++ (using gcc/g++12) project. Follow mostly from

https://stackoverflow.com/a/66832862/6760184

  • Enable C++:

    • Open Tools/Plugins/Settings
      • Check NetBeans 8.2 Plugin Portal
      • Go back to Available Plugins and press Check for Newest button.
      • Check C/C++ plugin and press Install button.
    • specify unpack200 location
      • Pre-13 OpenJDK is bundled at, for example, /usr/lib/jvm/java-11-openjdk-amd64/bin/unpack200 It is gone after version 14.
      • Or, install with sudo apt install mlocate and use ls -l `locate unpack200` to locate unpack200.

  • Enable C++17

  • Enable C++20

    • Right click project Properties/C++ Compiler/Additional Options and add

      -std=c++20

Hope this helps!

Upvotes: 5

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