80 lines
3.0 KiB
Rust
80 lines
3.0 KiB
Rust
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fn main() {
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// Skip pkg-config check if just generating documentation.
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if std::env::var_os("DOCS_RS").is_some() {
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return;
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}
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let lib_name = "libpulse";
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let fallback_name = {
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#[cfg(target_os = "linux")]
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{ "pulse::libpulse.so.0" }
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#[cfg(target_os = "macos")]
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{ "pulse::libpulse.0.dylib" }
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#[cfg(windows)]
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{ "pulse::libpulse-0.dll" }
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#[cfg(not(any(target_os = "linux", target_os = "macos", windows)))]
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{ "pulse" }
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};
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let min_version = {
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#[cfg(feature = "pa_v15")]
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{ "15.0" }
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#[cfg(all(feature = "pa_v14", not(feature = "pa_v15")))]
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{ "14.0" }
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#[cfg(all(feature = "pa_v13", not(feature = "pa_v14")))]
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{ "13.0" }
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#[cfg(all(feature = "pa_v12", not(feature = "pa_v13")))]
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{ "12.0" }
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#[cfg(all(feature = "pa_v8", not(feature = "pa_v12")))]
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{ "8.0" }
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#[cfg(all(feature = "pa_v6", not(feature = "pa_v8")))]
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{ "6.0" }
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#[cfg(not(feature = "pa_v6"))]
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{ "5.0" }
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};
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let mut config = pkg_config::Config::new();
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// Has the user got pkg-config and the PA pkg-config file installed (via dev package)?
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// This is a little crude, since impossible to reliably distinguish between pkg-config errors
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// (it only gives strings, and they could be translated). We perform a non-version specific
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// check here, and disable generation of cargo meta data, thus doing a 'exists' type check.
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config.cargo_metadata(false);
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let fallback = match config.probe(lib_name) {
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// We assume all failure here (being a non-version specific check) indicates no *.pc file
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Err(pkg_config::Error::ProbeFailure { .. }) |
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Err(pkg_config::Error::Failure { .. }) => {
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println!("cargo:warning=Pkg-config seems to not know about PulseAudio (dev package not installed?), \
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trying generic fallback...");
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true
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},
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// Also allow fallback if pkg-config not installed, or disabled
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Err(pkg_config::Error::EnvNoPkgConfig(_)) |
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Err(pkg_config::Error::Command { .. }) => {
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println!("cargo:warning=No pkg-config or disabled, trying generic fallback...");
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true
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},
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// In all other cases we will perform a version-specfic check and honor the result
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_ => false,
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};
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// If the user does not have pkg-config or the PA *.pc file (they have not installed the dev
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// package), then let’s try a default fallback (having to install dev packages for Rust
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// development is unnatural imo, ideally distros should start shipping *.pc files differently).
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if fallback {
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println!("cargo:rustc-link-lib={}", fallback_name);
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return;
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}
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config.cargo_metadata(true)
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.atleast_version(min_version);
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// Do version specific pkg-config check and honor result
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match config.probe(lib_name) {
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Err(e) => {
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println!("cargo:warning={}", e);
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std::process::exit(1);
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},
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Ok(_) => {},
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}
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}
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