1 // SPDX-License-Identifier: Apache-2.0
15 fn parse_elf_header(path: &Path) -> io::Result<u8> {  in parse_elf_header()
27 fn parse_pe_header(path: &Path) -> io::Result<u16> {  in parse_pe_header()
51 /// Checks that a `libclang` shared library matches the target platform.
52 fn validate_library(path: &Path) -> Result<(), String> {  in validate_library()
57             return Err("invalid ELF class (64-bit)".into());  in validate_library()
61             return Err("invalid ELF class (32-bit)".into());  in validate_library()
69             return Err("invalid DLL (64-bit)".into());  in validate_library()
73             return Err("invalid DLL (32-bit)".into());  in validate_library()
86 /// Extracts the version components in a `libclang` shared library filename.
87 fn parse_version(filename: &str) -> Vec<u32> {  in parse_version()
88     let version = if let Some(version) = filename.strip_prefix("libclang.so.") {  in parse_version()  localVariable
89         version  in parse_version()
90     } else if filename.starts_with("libclang-") {  in parse_version()
91         &filename[9..filename.len() - 3]  in parse_version()
96     version.split('.').map(|s| s.parse().unwrap_or(0)).collect()  in parse_version()
99 /// Finds `libclang` shared libraries and returns the paths to, filenames of,
101 fn search_libclang_directories(runtime: bool) -> Result<Vec<(PathBuf, String, Vec<u32>)>, String> {  in search_libclang_directories()
109         // Some Linux distributions don't create a `libclang.so` symlink, so we  in search_libclang_directories()
110         // need to look for versioned files (e.g., `libclang-3.9.so`).  in search_libclang_directories()
111         files.push("libclang-*.so".into());  in search_libclang_directories()
113         // Some Linux distributions don't create a `libclang.so` symlink and  in search_libclang_directories()
115         // suffix versioned files (e.g., `libclang.so.1`). However, `ld` cannot  in search_libclang_directories()
119             files.push("libclang.so.*".into());  in search_libclang_directories()
120             files.push("libclang-*.so.*".into());  in search_libclang_directories()
125         // Some BSD distributions don't create a `libclang.so` symlink either,  in search_libclang_directories()
127         // `libclang.so.7.0`).  in search_libclang_directories()
128         files.push("libclang.so.*".into());  in search_libclang_directories()
132         // The official LLVM build uses `libclang.dll` on Windows instead of  in search_libclang_directories()
134         files.push("libclang.dll".into());  in search_libclang_directories()
137     // Find and validate `libclang` shared libraries and collect the versions.  in search_libclang_directories()
144                 let version = parse_version(&filename);  in search_libclang_directories()  localVariable
145                 valid.push((directory, filename, version))  in search_libclang_directories()
170 /// Finds the "best" `libclang` shared library and returns the directory and
172 pub fn find(runtime: bool) -> Result<(PathBuf, String), String> {  in find()
175         // We want to find the `libclang` shared library with the highest  in find()
176         // version number, hence `max_by_key` below.  in find()
178         // However, in the case where there are multiple such `libclang` shared  in find()
181         // that function returns `libclang` shared libraries in descending order  in find()
199 /// Finds and links to a `libclang` shared library.
207     println!("cargo:rustc-link-search={}", directory.display());  in link()
210         // Find the `libclang` stub static library required for the MSVC  in link()
218         if lib.join("libclang.lib").exists() {  in link()
219             println!("cargo:rustc-link-search={}", lib.display());  in link()
220         } else if lib.join("libclang.dll.a").exists() {  in link()
221             // MSYS and MinGW use `libclang.dll.a` instead of `libclang.lib`.  in link()
228                 lib.join("libclang.dll.a"),  in link()
229                 Path::new(&out).join("libclang.lib"),  in link()
232             println!("cargo:rustc-link-search=native={}", out);  in link()
235                 "using '{}', so 'libclang.lib' or 'libclang.dll.a' must be \  in link()
242         println!("cargo:rustc-link-lib=dylib=libclang");  in link()
246         // Strip extensions and trailing version numbers (e.g., the `.so.7.0` in  in link()
247         // `libclang.so.7.0`).  in link()
253         println!("cargo:rustc-link-lib=dylib={}", name);  in link()