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Add sdk linker flag for broken MacOS systems (#527)

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Dominik Maier 2022-02-08 18:29:48 +01:00 committed by GitHub
parent a3345902c2
commit 6bfbdd6318
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1 changed files with 17 additions and 0 deletions
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17
libafl_cc/build.rs
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@ -73,6 +73,18 @@ fn find_llvm_config() -> String {
})
}
/// Use `xcrun` to get the path to the Xcode SDK tools library path, for linking
fn find_macos_sdk_libs() -> String {
let sdk_path_out = Command::new("xcrun")
.args(&["--show-sdk-path"])
.output()
.expect("Failed to execute xcrun. Make sure you have Xcode installed and executed `sudo xcode-select --install`");
format!(
"-L{}/usr/lib",
String::from_utf8(sdk_path_out.stdout).unwrap().trim()
)
}
#[allow(clippy::too_many_lines)]
fn main() {
let out_dir = env::var_os("OUT_DIR").unwrap();
@ -150,11 +162,16 @@ fn main() {
let cxxflags: Vec<&str> = cxxflags.trim().split_whitespace().collect();
let mut ldflags: Vec<&str> = ldflags.trim().split_whitespace().collect();
let sdk_path;
if env::var("CARGO_CFG_TARGET_VENDOR").unwrap().as_str() == "apple" {
// Needed on macos.
// Explanation at https://github.com/banach-space/llvm-tutor/blob/787b09ed31ff7f0e7bdd42ae20547d27e2991512/lib/CMakeLists.txt#L59
ldflags.push("-undefined");
ldflags.push("dynamic_lookup");
// In case the system is configured oddly, we may have trouble finding the SDK. Manually add the linker flag, just in case.
sdk_path = find_macos_sdk_libs();
ldflags.push(&sdk_path);
};
println!("cargo:rerun-if-changed=src/common-llvm.h");