SPECS: Add rust-platforms-3.

Signed-off-by: misaka00251 <liuxin@iscas.ac.cn>

SPECS/rust-platforms-3/Cargo.toml

@@ -0,0 +1,62 @@
+# THIS FILE IS AUTOMATICALLY GENERATED BY CARGO
+#
+# When uploading crates to the registry Cargo will automatically
+# "normalize" Cargo.toml files for maximal compatibility
+# with all versions of Cargo and also rewrite `path` dependencies
+# to registry (e.g., crates.io) dependencies.
+#
+# If you are reading this file be aware that the original Cargo.toml
+# will likely look very different (and much more reasonable).
+# See Cargo.toml.orig for the original contents.
+
+[package]
+edition = "2018"
+name = "platforms"
+version = "3.12.0"
+authors = [
+    "Tony Arcieri <bascule@gmail.com>",
+    'Sergey "Shnatsel" Davidoff <shnatsel@gmail.com>',
+]
+build = false
+exclude = [
+    "README.header.md",
+    "platform-support.md",
+    "regenerate-platforms-crate.sh",
+]
+autolib = false
+autobins = false
+autoexamples = false
+autotests = false
+autobenches = false
+description = """
+Rust platform registry with information about valid Rust platforms (target
+triple, target_arch, target_os) sourced from the Rust compiler.
+"""
+homepage = "https://rustsec.org"
+readme = "README.md"
+keywords = [
+    "architectures",
+    "cpu",
+    "os",
+    "targets",
+    "triples",
+]
+categories = [
+    "development-tools",
+    "no-std",
+]
+license = "Apache-2.0 OR MIT"
+repository = "https://github.com/rustsec/rustsec"
+resolver = "2"
+
+[features]
+default = ["std"]
+std = []
+
+[lib]
+name = "platforms"
+path = "src/lib.rs"
+
+[dependencies.serde]
+version = "1"
+optional = true

SPECS/rust-platforms-3/rust-platforms-3.spec

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+# SPDX-FileCopyrightText: (C) 2026 Institute of Software, Chinese Academy of Sciences (ISCAS)
+# SPDX-FileCopyrightText: (C) 2026 openRuyi Project Contributors
+#
+# SPDX-License-Identifier: MulanPSL-2.0
+
+%global crate_name platforms
+%global full_version 3.12.0
+%global pkgname platforms-3
+
+Name:           rust-platforms-3
+Version:        3.12.0
+Release:        %autorelease
+Summary:        Rust crate "platforms"
+License:        Apache-2.0 OR MIT
+URL:            https://rustsec.org
+#!RemoteAsset:  sha256:9245c6e7c5a6bcdd7977fdf6d1e1c67f4cc2d0d58c041df0ea5940953033e6ca
+Source:         https://static.crates.io/crates/%{crate_name}/%{full_version}/download#/%{name}-%{version}.tar.gz
+BuildArch:      noarch
+BuildSystem:    rustcrates
+
+BuildRequires:  rust-rpm-macros
+
+Provides:       crate(%{pkgname}) = %{version}
+Provides:       crate(%{pkgname}/default) = %{version}
+Provides:       crate(%{pkgname}/std) = %{version}
+
+%description
+Source code for takopackized Rust crate "platforms"
+
+%package     -n %{name}+serde
+Summary:        Rust platform registry with information about valid Rust platforms (target triple, target_arch, target_os) sourced from the Rust compiler - feature "serde"
+Requires:       crate(%{pkgname}) = %{version}
+Requires:       crate(serde-1/default) >= 1.0.0
+Provides:       crate(%{pkgname}/serde) = %{version}
+
+%description -n %{name}+serde
+This metapackage enables feature "serde" for the Rust platforms crate, by pulling in any additional dependencies needed by that feature.
+
+%files
+%{_datadir}/cargo/registry/%{crate_name}-%{version}/
+
+%changelog
+%autochangelog