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Check PostgreSQL major version and add linking flags if needed #28

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Check PostgreSQL major version and add linking flags if needed #28

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21 changes: 20 additions & 1 deletion build.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -9,6 +9,7 @@ use std::env;
use std::path::PathBuf;
use std::fmt::{self, Display};

#[derive(Eq, PartialEq)]
enum LinkType {
Static,
Dynamic
Expand Down Expand Up @@ -81,6 +82,12 @@ fn main() {
println!("cargo:rerun-if-env-changed=PQ_LIB_STATIC");
println!("cargo:rerun-if-env-changed=TARGET");

// If major version of PostgreSQL is not known, use 12 as default,
// as version 12 introduced new required linking flags for static builds.
// Those flags are normally optional, but required when version is >= 12
// and the build type is static.
let mut major_version = 12;

if let Ok(lib_dir) = env::var("PQ_LIB_DIR") {
println!("cargo:rustc-link-search=native={}", lib_dir);
} else if configured_by_pkg_config() {
Expand All @@ -90,8 +97,20 @@ fn main() {
} else if let Some(path) = pg_config_output("--libdir") {
let path = replace_homebrew_path_on_mac(path);
println!("cargo:rustc-link-search=native={}", path);

let pg_ver = pg_config_output("--version").expect("pg_config was already shown to work");
major_version = pg_ver.split_whitespace().nth(1)
.and_then(|s| s.split('.').nth(0))
.and_then(|s| s.parse::<u32>().ok()).expect("invalid version number schema");
}

let link_opts = LinkingOptions::from_env();
println!("cargo:rustc-link-lib={}", link_opts);

if major_version >= 12 && link_opts.linking_type == Some(LinkType::Static) {
println!("cargo:rustc-link-lib=static=pgcommon");
println!("cargo:rustc-link-lib=static=pgport");
}
println!("cargo:rustc-link-lib={}", LinkingOptions::from_env());
}

#[cfg(feature = "pkg-config")]
Expand Down