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From 04260b868ac1b9d8d7946ead0ff866070d14fda2 Mon Sep 17 00:00:00 2001
From: GRENEWODE <grenewode@pm.me>
Date: Thu, 20 Feb 2025 23:02:21 -0500
Subject: [PATCH] fix: Resolve API incompatiblities on FreeBSD hosts
FreeBSD's `libutil` library defines `pw_init` and `pw_deinit` functions,
conflicting with the PipeWire API `pw_init` and `pw_deinit` functions.
To resolve the conflict, the PipeWire package in FreeBSD's ports
patches the function definitions, renaming `pw_init` to `pipewire_init`
and renaming `pw_deinit` to `pipewire_deinit`.
As a result, the expected `pw_init` and `pw_deinit` functions are not
generated on FreeBSD (and probably other BSDs).
Since Rust supports namespaces, we can manually define `pw_init` and
`pw_deinit` aliases and there are not conflicts with any other libraries.
Notes:
* `pipewire-sys/build.rs`
Update add the `pipewire_*` pattern to the allow list, so that the aliases are picked up by bindgen
* `pipewire-sys/src/lib.rs`
Adds aliases to for `pipewire_init` and `pipewire_deinit` to `pw_init` and `pw_deinit` respectively.
See Also:
* https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=284719
* https://github.com/freebsd/freebsd-ports/blob/87adc7e46597e5e28eb6139946530029f9363f79/multimedia/pipewire/files/patch-src_pipewire_pipewire_init
--- cargo-crates/pipewire-sys-0.8.0/build.rs.orig 2006-07-24 01:21:28 UTC
+++ cargo-crates/pipewire-sys-0.8.0/build.rs
@@ -20,6 +20,11 @@ fn main() {
.parse_callbacks(Box::new(bindgen::CargoCallbacks::new()))
.size_t_is_usize(true)
.allowlist_function("pw_.*")
+ // Special case for FreeBSD.
+ // https://github.com/freebsd/freebsd-ports/blob/main/multimedia/pipewire/files/patch-src_pipewire_pipewire_init
+ // `libutil` defines functions pw_{init, deinit}, so those functions are aliased as pipewire_{init, deinit}
+ // in the port multimedia/pipewire
+ .allowlist_function("pipewire_.*")
.allowlist_type("pw_.*")
.allowlist_var("pw_.*")
.allowlist_var("PW_.*")
--- cargo-crates/pipewire-sys-0.8.0/src/lib.rs.orig 2006-07-24 01:21:28 UTC
+++ cargo-crates/pipewire-sys-0.8.0/src/lib.rs
@@ -13,6 +13,14 @@ pub use bindings::*;
}
pub use bindings::*;
+// See comment in build.rs
+// Adds compatibility for patched pipewire in FreeBSD
+#[cfg(target_os = "freebsd")]
+pub use bindings::pipewire_init as pw_init;
+
+#[cfg(target_os = "freebsd")]
+pub use bindings::pipewire_deinit as pw_deinit;
+
#[cfg(test)]
mod tests {
use super::*;
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