They currently reside under Build/<arch>, meaning that they would be
redownloaded for each architecture/toolchain build combo. Move them to a
location that can be re-used for all builds.
We previously disregarded Apple clang entirely, since no released
version was able to succesfully build Lagom. Xcode 14 seems to have
all the features we need, as we haven't added any code that needs
trunk clang features in quite a while.
So far we've gotten away with using GCC 11 for Lagom and to compile the
toolchain, but via #15795 we discovered a compiler bug that has been
fixed in the latest version but would error the build with CI's GCC 11.
Time for an upgrade :^)
We already use ubuntu-22.04 images in most places, so this is pretty
straightforward. The only exception is Idan's self-hosted runner, which
uses Ubuntu Focal. LibJS should build fine with GCC 11, still.
This ensures that the toolchain building scripts will use the host
toolchain that has been found manually, and that they won't fall back to
`cc` (which in the worst case may not even be installed).
This is a preparation to check if our users find noticeable bugs in the
x86-64 target, before we can decide if we want to remove the i686 target
for good.
Homebrew does not add upstream LLVM's install location to $PATH so as
not to conflict with XCode tools, so we should look for it by its
absolute path. LLVM is installed to /opt/homebrew/opt/llvm on ARM Macs,
and is a symlink that points to the latest stable LLVM version.
Previously, `serenity.sh rebuild-toolchain x86_64 clang` would simply
start building GCC instead and call it a day. With this change, if a
toolchain is passed as an argument, it is validated if it is either
"GNU" or "Clang" and exits with an error otherwise.
The `TOOLCHAIN` value defaults to the `SERENITY_TOOLCHAIN` environment
variable if not provided explicitly.
Various Clang binaries are now considered when choosing the compiler for
Lagom.
The selection precedence is as follows:
1. Use the compiler set via CC/CXX if it's a supported version
2. Use newest available GCC if it's supported
3. Use newest available Clang if it's supported
Note that Apple Clang is still not supported, as its versioning scheme
and the fact that it masquerades as both GCC and Clang would complicate
this logic even more.
Fixes#12253
Because of ninja's default behavior of using all processors this gave
the correct behaviour because MAKEJOBS was empty. However this meant
that the processor count was printed to stderr when building.
We now pass along the toolchain type to all subcommands. This ensures
that gdb will load the correct debug information for kernels compiled
with Clang, and the following warning won't appear with the GNU
toolchain:
> WARNING: unknown toolchain 'gdb'. Defaulting to GNU.
> Valid values are 'Clang', 'GNU' (default)
egcc is the alias for the GCC compiler (since OpenBSD uses Clang by
default). Toolchain/BuildIt.sh has the necessary adjustments, but the
compiler check occurs before BuildIt.sh is called.
'bootmode' now only controls which set of services are started by
SystemServer, so it is more appropriate to rename it to system_mode, and
no longer validate it in the Kernel.
Bootmode used to control framebuffers, panic behavior, and SystemServer.
This patch factors framebuffer control into a separate flag.
Note that the combination 'bootmode=self-test fbdev=on' leads to
unexpected behavior, which can only be fixed in a later commit.
This commit updates the Clang toolchain's version to 13.0.0, which comes
with better C++20 support and improved handling of new features by
clang-format. Due to the newly enabled `-Bsymbolic-functions` flag, our
Clang binaries will only be 2-4% slower than if we dynamically linked
them, but we save hundreds of megabytes of disk space.
The `BuildClang.sh` script has been reworked to build the entire
toolchain in just three steps: one for the compiler, one for GNU
binutils, and one for the runtime libraries. This reduces the complexity
of the build script, and will allow us to modify the CI configuration to
only rebuild the libraries when our libc headers change.
Most of the compile flags have been moved out to a separate CMake cache
file, similarly to how the Android and Fuchsia toolchains are
implemented within the LLVM repo. This provides a nicer interface than
the heaps of command-line arguments.
We no longer build separate toolchains for each architecture, as the
same Clang binary can compile code for multiple targets.
The horrible mess that `SERENITY_CLANG_ARCH` was, has been removed in
this commit. Clang happily accepts an `i686-pc-serenity` target triple,
which matches what our GCC toolchain accepts.
It's "Clang" (capitalized). Silently building gcc if the toolchain
isn't know seems a bit unfriendly. So print a warning for this
(and for other unknown toolchains).
If the superbuild created the lagom binary directory, it won't set
BUILD_LAGOM=ON in the CMake cache for that binary directory. Insert a
check into build_target() to make sure that if the user explicitly asks
for the lagom target, we have all our ducks in a row.
Direct build commands to the SuperBuild's binary directory, and
image/run commands to the Serenity binary directory.
As a side benefit, make the lagom target only build Lagom instead of the
entire OS alongside Lagom.
This environment variable is already widely used across our build
scripts and tooling, so serenity.sh should respect it as well.
It still uses i686 as the fallback.
This command copies the project's source tree to
/home/anon/Source/serenity in the built disk image.
This will be useful for working on serenity inside serenity :^)
