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// SPDX-License-Identifier: MPL-2.0 OR LGPL-3.0-or-later
/*
* libpathrs: safe path resolution on Linux
* Copyright (C) 2019-2025 Aleksa Sarai <cyphar@cyphar.com>
* Copyright (C) 2019-2025 SUSE LLC
*
* == MPL-2.0 ==
*
* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at https://mozilla.org/MPL/2.0/.
*
* Alternatively, this Source Code Form may also (at your option) be used
* under the terms of the GNU Lesser General Public License Version 3, as
* described below:
*
* == LGPL-3.0-or-later ==
*
* This program is free software: you can redistribute it and/or modify it
* under the terms of the GNU Lesser General Public License as published by
* the Free Software Foundation, either version 3 of the License, or (at
* your option) any later version.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General
* Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this program. If not, see <https://www.gnu.org/licenses/>.
*/
use std::{env, io::Write};
use tempfile::NamedTempFile;
fn main() {
// Add DT_SONAME and other ELF metadata to our cdylibs. We can't check the
// crate-type here directly, but we can at least avoid needless warnings for
// "cargo build" by only emitting this when the capi feature is enabled.
if cfg!(feature = "capi") {
let name = "pathrs";
// TODO: Since we use symbol versioning, it seems quite unlikely that we
// would ever bump the major version in the SONAME, so we should
// probably hard-code this or define it elsewhere.
let major = env::var("CARGO_PKG_VERSION_MAJOR").unwrap();
println!("cargo:rustc-cdylib-link-arg=-Wl,-soname,lib{name}.so.{major}");
let (mut version_script_file, version_script_path) =
NamedTempFile::with_prefix("libpathrs-version-script.")
.expect("mktemp")
.keep()
.expect("persist mktemp");
let version_script_path = version_script_path
.to_str()
.expect("mktemp should be utf-8 safe string");
writeln!(
version_script_file,
// All of the symbol versions are done with in-line .symver entries.
// This version script is only needed to define the version nodes
// (and their dependencies).
// FIXME: "local" doesn't appear to actually hide symbols in the
// output .so. For more information about getting all of this to
// work nicely, see <https://internals.rust-lang.org/t/23626>.
r#"
LIBPATHRS_0.2 {{ local: *; }} LIBPATHRS_0.1;
LIBPATHRS_0.1 {{ }};
"#
)
.expect("write version script");
println!("cargo:rustc-cdylib-link-arg=-Wl,--version-script={version_script_path}");
println!("cargo:rustc-cdylib-link-arg=-Wl,--wrap=pathrs_inroot_open_bad");
}
}
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