1938023 - Be more consistent when cross compiling clang

Status: RESOLVED FIXED

(Firefox Build System :: Toolchains, task)

Comment 1

[Mike Hommey [:glandium]]

Attachment: Bug 1938023 - Be more consistent when cross compiling clang.

There are some cmake flags we currently only set for mac cross compiles,
but would be just as good to always set and/or for all cross compiles.

The former is the case for CMAKE_*_COMPILER_TARGET.
The latter it the case for CMAKE_SYSTEM_NAME, which implies
CMAKE_CROSSCOMPILING.
LLVM_DEFAULT_TARGET_TRIPLE is implied by LLVM_HOST_TRIPLE, which is
also more important to set, so we set that one instead.

While touching build-clang.py, we also add aarch64-unknown-linux-gnu
as a supported cross-compilation target without adding the corresponding
toolchain. This will avoid rebuilding all the compilers when just adding
new configs for arm64 linux clang toolchains.

Comment 2

[Pulsebot]

Pushed by [e-mail]:
https://hg.mozilla.org/integration/autoland/rev/39558d6fbceb
Be more consistent when cross compiling clang. r=firefox-build-system-reviewers,sergesanspaille

Comment 3

[agoloman]

https://hg.mozilla.org/mozilla-central/rev/39558d6fbceb