mirror of
https://github.com/AsahiLinux/u-boot
synced 2024-11-28 15:41:40 +00:00
3a83960b76
This documentation briefly explains what is a compilation database, and how to use the script to generate one. This is not a portage, as there was no original documentation in the Linux sources. Acknowledge the documentation in the script's header and in doc/build index. Signed-off-by: Joao Marcos Costa <jmcosta944@gmail.com> Tested-by: Joao Paulo Goncalves <joao.goncalves@toradex.com>
83 lines
3.2 KiB
ReStructuredText
83 lines
3.2 KiB
ReStructuredText
.. SPDX-License-Identifier: GPL-2.0-only
|
|
|
|
Create build database for IDEs
|
|
==============================
|
|
|
|
gen_compile_commands (scripts/gen_compile_commands.py) is a script used to
|
|
generate a compilation database (compile_commands.json). This database consists
|
|
of an array of "command objects" describing how each translation unit was
|
|
compiled.
|
|
|
|
Example::
|
|
|
|
{
|
|
"command": "gcc -Wp,-MD,arch/x86/cpu/.lapic.o.d -nostdinc -isystem (...)"
|
|
"directory": "/home/jmcosta/u-boot",
|
|
"file": "/home/jmcosta/u-boot/arch/x86/cpu/lapic.c"
|
|
}
|
|
|
|
Such information comes from parsing the respective .cmd file of each translation
|
|
unit. In the previous example, that would be `arch/x86/cpu/.lapic.o.cmd`.
|
|
|
|
For more details on the database format, please refer to the official
|
|
documentation at https://clang.llvm.org/docs/JSONCompilationDatabase.html.
|
|
|
|
The compilation database is quite useful for text editors (and IDEs) that use
|
|
Clangd LSP. It allows jumping to definitions and declarations. Since it relies
|
|
on parsing .cmd files, one needs to have a target (e.g. configs/xxx_defconfig)
|
|
built before running the script.
|
|
|
|
Example::
|
|
|
|
make sandbox_defconfig
|
|
make
|
|
./scripts/gen_compile_commands.py
|
|
|
|
Beware that depending on the changes you made to the project's source code, you
|
|
may need to run the script again (presuming you recompiled your target, of
|
|
course) to have an up-to-date database.
|
|
|
|
The database will be in the root of the repository. No further modifications are
|
|
needed for it to be usable by the LSP, unless you set a name for the database
|
|
other than it's default one (compile_commands.json).
|
|
|
|
Compatible IDEs
|
|
===============
|
|
|
|
Several popular integrated development environments (IDEs) support the use
|
|
of JSON compilation databases for C/C++ development, making it easier to
|
|
manage build configurations and code analysis. Some of these IDEs include:
|
|
|
|
1. **Visual Studio Code (VS Code)**: IntelliSense in VS Code can be set up to
|
|
use compile_commands.json by following the instructions in
|
|
https://code.visualstudio.com/docs/cpp/faq-cpp#_how-do-i-get-intellisense-to-work-correctly.
|
|
|
|
2. **CLion**: JetBrains' CLion IDE supports JSON compilation databases out
|
|
of the box. You can configure your project to use a compile_commands.json
|
|
file via the project settings. Details on setting up CLion with JSON
|
|
compilation databases can be found at
|
|
https://www.jetbrains.com/help/clion/compilation-database.html.
|
|
|
|
3. **Qt Creator**: Qt Creator, a popular IDE for Qt development, also
|
|
supports compile_commands.json for C/C++ projects. Instructions on how to
|
|
use this feature can be found at
|
|
https://doc.qt.io/qtcreator/creator-clang-codemodel.html#using-compilation-databases.
|
|
|
|
4. **Eclipse CDT**: Eclipse's C/C++ Development Tools (CDT) can be
|
|
configured to use JSON compilation databases for better project management.
|
|
You can find guidance on setting up JSON compilation database support at the
|
|
wiki: https://wiki.eclipse.org/CDT/User/NewIn910#Build.
|
|
|
|
For Vim, Neovim, and Emacs, if you are using Clangd as your LSP, placing the
|
|
compile_commands.json in the root of the repository should suffice to enable
|
|
code navigation.
|
|
|
|
Usage
|
|
=====
|
|
|
|
For further details on the script's options, please refer to its help message,
|
|
as in the example below.
|
|
|
|
Help::
|
|
|
|
./scripts/gen_compile_commands.py --help
|