darling-openjdk/doc/ide.md

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% IDE support in the JDK
## Introduction
When you are familiar with building and testing the JDK, you may want to
configure an IDE to work with the source code. The instructions differ a bit
depending on whether you are interested in working with the native (C/C++) or
the Java code.
### IDE support for native code
There are a few ways to generate IDE configuration for the native sources,
depending on which IDE to use.
#### Visual Studio Code
The make system can generate a [Visual Studio Code](https://code.visualstudio.com)
workspace that has C/C++ source indexing configured correctly, as well as
launcher targets for tests and the Java launcher. After configuring, a workspace
for the configuration can be generated using:
```shell
make vscode-project
```
This creates a file called `jdk.code-workspace` in the build output folder. The
full location will be printed after the workspace has been generated. To use it,
choose `File -> Open Workspace...` in Visual Studio Code.
##### Alternative indexers
The main `vscode-project` target configures the default C++ support in Visual
Studio Code. There are also other source indexers that can be installed, that
may provide additional features. It's currently possible to generate
configuration for two such indexers, [clangd](https://clang.llvm.org/extra/clangd/)
and [rtags](https://github.com/Andersbakken/rtags). These can be configured by
appending the name of the indexer to the make target, such as:
```shell
make vscode-project-clangd
```
Additional instructions for configuring the given indexer will be displayed
after the workspace has been generated.
#### Visual Studio
This section is a work in progress.
```shell
make ide-project
```
#### Compilation Database
The make system can generate generic native code indexing support in the form of
a [Compilation Database](https://clang.llvm.org/docs/JSONCompilationDatabase.html)
that can be used by many different IDEs and source code indexers.
```shell
make compile-commands
```
It's also possible to generate the Compilation Database for the HotSpot source
code only, which is a bit faster as it includes less information.
```shell
make compile-commands-hotspot
```
### IDE support for Java code
This section is a work in progress.