# cpu_features を Homebrew, apt, Nix でインストール cpu_features のインストール経路、実行ファイル、メタデータ、AI エージェント向けセキュリティノートを確認します。 ## インストール ```sh sudo av install brew:cpu_features ``` 追加のインストールコマンド: ### macOS - Homebrew (100%): ```sh brew install cpu_features ``` 証拠: local Homebrew formula metadata ### Linux - Debian apt (92%): ```sh sudo apt install libcpu-features-dev ``` 証拠: Debian stable package indexes: libcpu-features-dev from https://deb.debian.org/debian/dists/stable/main/binary-amd64/Packages.xz - Nix (92%): ```sh nix profile install nixpkgs#cpu_features ``` 証拠: nixpkgs package indexes: pkgs/by-name/cp/cpu_features/package.nix from https://api.github.com/repos/NixOS/nixpkgs/git/trees/master?recursive=1 ## パッケージ情報 - **パッケージキー:** brew:cpu_features - **パッケージマネージャ:** Homebrew - **バージョン:** 0.11.0 - **ソース概要:** Cross platform C99 library to get cpu features at runtime - **ホームページ:** - **リポジトリ:** - **最終更新:** 2026-06-01T17:25:20Z - **生成日時:** 2026-08-03T19:37:03+00:00 ## 実行可能ファイル - list_cpu_features (エイリアス) ## インストール挙動 - Bottle: 利用不可 ## バージョンと鮮度 - ページ生成日: 2026-08-03 - マネージャ版: 0.11.0 ## プロジェクトの歴史と使われ方 cpu_features is Google's portable C99 library for detecting CPU instruction-set and microarchitecture features at runtime. ### プロジェクトの歴史 The official repository was created in 2018. Its README emphasizes portability, old-compiler compatibility, sandbox-aware detection strategies, thread safety, no allocation, no exceptions, unit tests, and suitability for low-level code such as libc-style routines. ### 採用の歴史 The README positions cpu_features as cross-platform infrastructure across Linux, macOS, Windows, Android, and several CPU families. It also describes Android support and an NDK cpu-features.h compatibility layer, making it relevant to projects that need runtime dispatch without depending on platform-specific probes. ### 使われ方 Users include architecture-specific headers such as cpuinfo_x86.h or cpuinfo_arm.h, read feature structures returned by GetX86Info or GetArmInfo, and select optimized code paths based on runtime CPU support. The package also builds list_cpu_features for inspecting detected features, including JSON output. ### パッケージ好きにとっての重要性 For packagers, cpu_features is a small but foundational library: it helps upstreams choose optimized code paths while still shipping generic binaries, and it is designed to build with CMake, Bazel, and Zig across many architectures. ### タイムライン - 2018: The google/cpu_features repository was created. - 2025: v0.10.x releases were published from the official GitHub repository. - 2026: v0.11.0 was published from the official GitHub repository. ### Related projects - The README describes cpu_features as an Android NDK cpu-features.h drop-in replacement. ### ソース - - - - ## セキュリティノート generalized runtime or code generation signal. - **Geiger リスク:** yellow / 中 - generalized runtime or code generation signal ## 他のパッケージマネージャ記録 - Debian apt - libcpu-features-dev - 0.9.0-1+b1: normalized package name match | Debian stable package indexes: libcpu-features-dev from https://deb.debian.org/debian/dists/stable/main/binary-amd64/Packages.xz | cross platform C99 library to get cpu features | https://github.com/google/cpu_features - Nix - cpu_features: normalized package name match | nixpkgs package indexes: pkgs/by-name/cp/cpu_features/package.nix from https://api.github.com/repos/NixOS/nixpkgs/git/trees/master?recursive=1 - Ubuntu apt - libcpu-features-dev - 0.9.0-1: normalized package name match | Ubuntu 24.04 LTS package indexes: libcpu-features-dev from https://archive.ubuntu.com/ubuntu/dists/noble/universe/binary-amd64/Packages.gz | cross platform C99 library to get cpu features | https://github.com/google/cpu_features ## Combined YAML source View the package source record on GitHub. [combined/cpu_features.yml](https://github.com/mxcl/pkgdb/blob/main/combined/cpu_features.yml) ## ソース - pkg.so package database - Geiger risk classifier - curated package history - pkgdb category and tag curation - external package-manager database matches - cross-ecosystem install command graph