use std::env; use std::fs; use std::path::PathBuf; const SKIP_FILENAMES: &[&str] = &["crc32_small", "crc64_small"]; fn main() { let target = env::var("TARGET").unwrap(); println!("cargo:rerun-if-changed=build.rs"); println!("cargo:rerun-if-env-changed=LZMA_API_STATIC"); let want_static = cfg!(feature = "static") || env::var("LZMA_API_STATIC").is_ok(); let msvc = target.contains("msvc"); // If a static link is desired, we compile from source. // If we're compiling for MSVC, pkg-config runs a risk of picking up MinGW // libraries by accident, so disable it. // // Otherwise check the system to see if it has an lzma library already // installed that we can use. if !want_static && !msvc && pkg_config::probe_library("liblzma").is_ok() { return; } let out_dir = env::var("OUT_DIR").unwrap(); println!("cargo:root={}", out_dir); let include_dir = env::current_dir().unwrap().join("xz-5.2/src/liblzma/api"); println!("cargo:include={}", include_dir.display()); let src_files = [ "xz-5.2/src/liblzma/common", "xz-5.2/src/liblzma/lzma", "xz-5.2/src/liblzma/lz", "xz-5.2/src/liblzma/check", "xz-5.2/src/liblzma/delta", "xz-5.2/src/liblzma/rangecoder", "xz-5.2/src/liblzma/simple", ] .iter() .flat_map(|dir| read_dir_files(dir)) .chain(vec![ "xz-5.2/src/common/tuklib_cpucores.c".into(), "xz-5.2/src/common/tuklib_physmem.c".into(), ]); let mut build = cc::Build::new(); build .files(src_files) // all C preproc defines are in `./config.h` .define("HAVE_CONFIG_H", "1") .include("xz-5.2/src/liblzma/api") .include("xz-5.2/src/liblzma/lzma") .include("xz-5.2/src/liblzma/lz") .include("xz-5.2/src/liblzma/check") .include("xz-5.2/src/liblzma/simple") .include("xz-5.2/src/liblzma/delta") .include("xz-5.2/src/liblzma/common") .include("xz-5.2/src/liblzma/rangecoder") .include("xz-5.2/src/common") .include(env::current_dir().unwrap()); if !target.ends_with("msvc") { build.flag("-std=c99").flag("-pthread"); } if let Ok(s) = env::var("CARGO_CFG_TARGET_ENDIAN") { if s == "big" { build.define("WORDS_BIGENDIAN", None); } } build.compile("liblzma.a"); } fn read_dir_files(dir: &str) -> impl Iterator { fs::read_dir(dir) .expect(&format!("failed to read dir {}", dir)) .filter_map(|ent| { let ent = ent.expect("failed to read entry"); if ent.file_type().unwrap().is_dir() { return None; } let path = ent.path(); if path.extension().unwrap() != "c" { return None; } { let file_stem = path.file_stem().unwrap().to_str().unwrap(); if SKIP_FILENAMES.contains(&file_stem) { return None; } if file_stem.ends_with("tablegen") { return None; } } Some(path) }) }