7437d0a6f1
This commits adds a second FreeBSD 12 build job, and splits the implementation of the FreeBSD module into two modules, one for FreeBSD 11, and one for FreeBSD 12. The FreeBSD 11 module is compiled always by default, and is mostly forward compatible with FreeBSD 12 systems. The FreeBSD 12 module is only built for now in libc's CI, and uses FreeBSD 12 data types and APIs, linking to symbols that are only available in FreeBSD 12. Basically, when LIBC_CI env variable is defined, and the host system is a FreeBSD 12 system, then the FreeBSD 12 module is automatically built and tested. Conditional compilation is done using a `cfg(freebsd12)` flag. This commit also re-enables many tests, and documents why some remain disabled.
102 lines
2.8 KiB
Rust
102 lines
2.8 KiB
Rust
use std::env;
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use std::process::Command;
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use std::str;
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fn main() {
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let rustc_minor_ver =
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rustc_minor_version().expect("Failed to get rustc version");
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let rustc_dep_of_std =
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std::env::var("CARGO_FEATURE_RUSTC_DEP_OF_STD").is_ok();
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let align_cargo_feature = std::env::var("CARGO_FEATURE_ALIGN").is_ok();
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if std::env::var("CARGO_FEATURE_USE_STD").is_ok() {
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println!(
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"cargo:warning=\"libc's use_std cargo feature is deprecated since libc 0.2.55; \
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please consider using the `std` cargo feature instead\""
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);
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}
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if std::env::var("LIBC_CI").is_ok() {
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if let Some(12) = which_freebsd() {
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println!("cargo:rustc-cfg=freebsd12");
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}
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}
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// Rust >= 1.15 supports private module use:
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if rustc_minor_ver >= 15 || rustc_dep_of_std {
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println!("cargo:rustc-cfg=libc_priv_mod_use");
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}
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// Rust >= 1.19 supports unions:
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if rustc_minor_ver >= 19 || rustc_dep_of_std {
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println!("cargo:rustc-cfg=libc_union");
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}
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// Rust >= 1.24 supports const mem::size_of:
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if rustc_minor_ver >= 24 || rustc_dep_of_std {
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println!("cargo:rustc-cfg=libc_const_size_of");
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}
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// Rust >= 1.25 supports repr(align):
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if rustc_minor_ver >= 25 || rustc_dep_of_std || align_cargo_feature {
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println!("cargo:rustc-cfg=libc_align");
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}
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// Rust >= 1.30 supports `core::ffi::c_void`, so libc can just re-export it.
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// Otherwise, it defines an incompatible type to retaining
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// backwards-compatibility.
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if rustc_minor_ver >= 30 || rustc_dep_of_std {
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println!("cargo:rustc-cfg=libc_core_cvoid");
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}
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// Rust >= 1.33 supports repr(packed(N))
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if rustc_minor_ver >= 33 || rustc_dep_of_std {
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println!("cargo:rustc-cfg=libc_packedN");
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}
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}
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fn rustc_minor_version() -> Option<u32> {
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macro_rules! otry {
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($e:expr) => {
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match $e {
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Some(e) => e,
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None => return None,
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}
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};
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}
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let rustc = otry!(env::var_os("RUSTC"));
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let output = otry!(Command::new(rustc).arg("--version").output().ok());
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let version = otry!(str::from_utf8(&output.stdout).ok());
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let mut pieces = version.split('.');
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if pieces.next() != Some("rustc 1") {
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return None;
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}
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otry!(pieces.next()).parse().ok()
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}
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fn which_freebsd() -> Option<i32> {
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let output = std::process::Command::new("freebsd-version").output().ok();
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if output.is_none() {
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return None;
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}
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let output = output.unwrap();
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if !output.status.success() {
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return None;
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}
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let stdout = String::from_utf8(output.stdout).ok();
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if stdout.is_none() {
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return None;
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}
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let stdout = stdout.unwrap();
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match &stdout {
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s if s.starts_with("11") => Some(11),
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s if s.starts_with("12") => Some(12),
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_ => None,
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}
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}
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