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profiles: force llvm USE-flag for Zig on unsupported targets

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Add an allowlist of targets where Zig can bootstrap itself without LLVM,
and allow disabling `llvm` USE-flag only on that targets.

Saves users from cryptic errors when they unknowingly try to use it on
ARM or other architecture, and help a little bit with future keywording.

Signed-off-by: Eric Joldasov <bratishkaerik@landless-city.net>
Closes: https://github.com/gentoo/gentoo/pull/40948
Signed-off-by: Sam James <sam@gentoo.org>
This commit is contained in:
Eric Joldasov
2025-03-20 00:09:22 +00:00
committed by Sam James
parent 8d2a889218
commit fa1113f44e
2 changed files with 15 additions and 1 deletions
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profiles/arch/amd64/package.use.force
+5 -1
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@@ -1,6 +1,10 @@
# Copyright 1999-2024 Gentoo Authors
# Copyright 1999-2025 Gentoo Authors
# Distributed under the terms of the GNU General Public License v2
# Eric Joldasov <bratishkaerik@landless-city.net> (2025-03-11)
# "x86_64" backend can succesfully bootstrap itself for Linux.
>=dev-lang/zig-0.13 -llvm
# James Le Cuirot <chewi@gentoo.org> (2024-07-02)
# Needed to build gcc. Force here rather than using BDEPEND to simplify
# cross-compile scenarios.
profiles/arch/base/package.use.force
+10
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@@ -0,0 +1,10 @@
# Copyright 2025 Gentoo Authors
# Distributed under the terms of the GNU General Public License v2
# Eric Joldasov <bratishkaerik@landless-city.net> (2025-03-11)
# Force building Zig with LLVM extensions enabled. Non-LLVM backends
# are in active development, and while some backends progressed enough
# to build some simple or complex program, only small amount of them
# can succesfully bootstrap Zig.
# Unforce on targets where it's possible to bootstrap without LLVM.
dev-lang/zig llvm