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// SPDX-License-Identifier: Apache-2.0↩
↩
extern crate glob;↩
↩
use std::path::{Path, PathBuf};↩
↩
use glob::Pattern;↩
↩
use super::common;↩
↩
//================================================↩
// Searching↩
//================================================↩
↩
/// Clang static libraries required to link to `libclang` 3.5 and later.↩
const CLANG_LIBRARIES: &[&str] = &[↩
"clang",↩
"clangAST",↩
"clangAnalysis",↩
"clangBasic",↩
"clangDriver",↩
"clangEdit",↩
"clangFrontend",↩
"clangIndex",↩
"clangLex",↩
"clangParse",↩
"clangRewrite",↩
"clangSema",↩
"clangSerialization",↩
];↩
↩
/// Gets the name of an LLVM or Clang static library from a path.↩
fn get_library_name(path: &Path) -> Option<String> {↩
path.file_stem().map(|p| {↩
let string = p.to_string_lossy();↩
if let Some(name) = string.strip_prefix("lib") {↩
name.to_owned()↩
} else {↩
string.to_string()↩
}↩
})↩
}↩
↩
/// Gets the LLVM static libraries required to link to `libclang`.↩
fn get_llvm_libraries() -> Vec<String> {↩
common::run_llvm_config(&["--libs"])↩
.unwrap()↩
.split_whitespace()↩
.filter_map(|p| {↩
// Depending on the version of `llvm-config` in use, listed↩
// libraries may be in one of two forms, a full path to the library↩
// or simply prefixed with `-l`.↩
if let Some(path) = p.strip_prefix("-l") {↩
Some(path.into())↩
} else {↩
get_library_name(Path::new(p))↩
}↩
})↩
.collect()↩
}↩
↩
/// Gets the Clang static libraries required to link to `libclang`.↩
fn get_clang_libraries<P: AsRef<Path>>(directory: P) -> Vec<String> {↩
// Escape the directory in case it contains characters that have special↩
// meaning in glob patterns (e.g., `[` or `]`).↩
let directory = Pattern::escape(directory.as_ref().to_str().unwrap());↩
let directory = Path::new(&directory);↩
↩
let pattern = directory.join("libclang*.a").to_str().unwrap().to_owned();↩
if let Ok(libraries) = glob::glob(&pattern) {↩
libraries↩
.filter_map(|l| l.ok().and_then(|l| get_library_name(&l)))↩
.collect()↩
} else {↩
CLANG_LIBRARIES.iter().map(|l| (*l).to_string()).collect()↩
}↩
}↩
↩
/// Finds a directory containing LLVM and Clang static libraries and returns the↩
/// path to that directory.↩
fn find() -> PathBuf {↩
let name = if target_os!("windows") {↩
"libclang.lib"↩
} else {↩
"libclang.a"↩
};↩
↩
let files = common::search_libclang_directories(&[name.into()], "LIBCLANG_STATIC_PATH");↩
if let Some((directory, _)) = files.into_iter().next() {↩
directory↩
} else {↩
panic!("could not find any static libraries");↩
}↩
}↩
↩
//================================================↩
// Linking↩
//================================================↩
↩
/// Finds and links to `libclang` static libraries.↩
pub fn link() {↩
let cep = common::CommandErrorPrinter::default();↩
↩
let directory = find();↩
↩
// Specify required Clang static libraries.↩
println!("cargo:rustc-link-search=native={}", directory.display());↩
for library in get_clang_libraries(directory) {↩
println!("cargo:rustc-link-lib=static={}", library);↩
}↩
↩
// Determine the shared mode used by LLVM.↩
let mode = common::run_llvm_config(&["--shared-mode"]).map(|m| m.trim().to_owned());↩
let prefix = if mode.map_or(false, |m| m == "static") {↩
"static="↩
} else {↩
""↩
};↩
↩
// Specify required LLVM static libraries.↩
println!(↩
"cargo:rustc-link-search=native={}",↩
common::run_llvm_config(&["--libdir"]).unwrap().trim_end()↩
);↩
for library in get_llvm_libraries() {↩
println!("cargo:rustc-link-lib={}{}", prefix, library);↩
}↩
↩
// Specify required system libraries.↩
// MSVC doesn't need this, as it tracks dependencies inside `.lib` files.↩
if cfg!(target_os = "freebsd") {↩
println!("cargo:rustc-flags=-l ffi -l ncursesw -l c++ -l z");↩
} else if cfg!(any(target_os = "haiku", target_os = "linux")) {↩
println!("cargo:rustc-flags=-l ffi -l ncursesw -l stdc++ -l z");↩
} else if cfg!(target_os = "macos") {↩
println!("cargo:rustc-flags=-l ffi -l ncurses -l c++ -l z");↩
}↩
↩
cep.discard();↩
}↩