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set RPATH on illumos and Linux (#36) #37

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set RPATH on illumos and Linux (#36) #37

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15 changes: 15 additions & 0 deletions build.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -83,13 +83,15 @@ fn main() {

if let Ok(lib_dir) = env::var("PQ_LIB_DIR") {
println!("cargo:rustc-link-search=native={}", lib_dir);
emit_rpath(&lib_dir);
} else if configured_by_pkg_config() {
return // pkg_config does everything for us, including output for cargo
} else if configured_by_vcpkg() {
return // vcpkg does everything for us, including output for cargo
} else if let Some(path) = pg_config_output("--libdir") {
let path = replace_homebrew_path_on_mac(path);
println!("cargo:rustc-link-search=native={}", path);
emit_rpath(&path);
}
println!("cargo:rustc-link-lib={}", LinkingOptions::from_env());
}
Expand Down Expand Up @@ -127,6 +129,19 @@ fn configured_by_vcpkg() -> bool {
false
}

//
// When libpq comes from a location that's not on the runtime linker's default
// search path, setting RPATH on the built binary is required in order for libpq
// to be found at runtime. Many linkers support this with `-R/path/to/library`.
//
#[cfg(any(target_os = "illumos", target_os = "linux"))]
fn emit_rpath(lib_dir: &str) {
println!("cargo:rustc-link-arg=-Wl,-R{}", lib_dir);
}

#[cfg(not(any(target_os = "illumos", target_os = "linux")))]
fn emit_rpath(_: &str) {}

fn pg_config_path() -> PathBuf {
if let Ok(target) = env::var("TARGET") {
let pg_config_for_target = &format!("PG_CONFIG_{}", target.to_ascii_uppercase().replace("-", "_"));
Expand Down