ladybird/Meta/gn
Nico Weber 1ab28276f6 LibGfx: Add the start of a JPEG2000 loader
JPEG2000 is the last image format used in PDF filters that we
don't have a loader for. Let's change that.

This adds all the scaffolding, but no actual implementation yet.
2024-03-25 20:35:00 +01:00
..
build Revert "Meta: Port recent changes to GN build" 2023-11-24 11:24:58 -05:00
secondary LibGfx: Add the start of a JPEG2000 loader 2024-03-25 20:35:00 +01:00
.gitignore Meta: Add the start of a gn build based on the LLVM gn build 2023-07-09 16:22:58 -06:00
README.md Meta: Add example linux gn args, fix CSS build on case-insensitive FS 2023-07-09 16:29:31 -06:00

gn build for SerenityOS and Ladybird

Warning! The GN build is experimental and best-effort. It might not work, and if you use it you're expected to feel comfortable to unbreak it if necessary. Serenity's official build system is CMake, if in doubt use that. If you add files, you're expected to update the CMake build but you don't need to update GN build files. Reviewers should not ask authors to update GN build files. Keeping the GN build files up-to-date is on the people who use the GN build.

GN is a metabuild system. It always creates ninja files, but it can create some IDE projects (MSVC, Xcode, ...) which then shell out to ninja for the actual build.

This is a good overview of GN.

For more information, motivation, philosophy, and inspriation, see the LLVM documentation on its GN build

Typical gn args

On macOS, the default args should work out of the box. For compiling Ladybird there won't be any tailoring needed if you have Qt6 installed via homebrew and the Xcode tools installed.

On Ubuntu, it's likely that the default cc and cxx will not be able to compile the project. For compiling Ladybird, a typical args.gn might look like the below:

args.gn

# Set build arguments here. See `gn help buildargs`.
# Chosen clang must be >= version 15.0.0
host_cc="clang"
host_cxx="clang++"
is_clang=true
use_lld=true
qt_install_headers="/usr/include/x86_64-linux-gnu/qt6/"
qt_install_lib="/usr/lib/x86_64-linux-gnu"
qt_install_libexec="/usr/lib/qt6/libexec/"

As with any gn project, gn args <build dir> --list is your best friend.