12     println!("cargo:rerun-if-env-changed=LIBZ_SYS_STATIC");  in main()
13     println!("cargo:rerun-if-changed=build.rs");  in main()
19     let want_ng = cfg!(feature = "zlib-ng") && !cfg!(feature = "stock-zlib");  in main()
21     if want_ng && target != "wasm32-unknown-unknown" {  in main()
25     // Don't run pkg-config if we're linking statically (we'll build below) and  in main()
26     // also don't run pkg-config on macOS/FreeBSD/DragonFly. That'll end up printing  in main()
27     // `-L /usr/lib` which wreaks havoc with linking to an OpenSSL in /usr/local/lib  in main()
32        !target.contains("msvc") && // pkg-config just never works here  in main()
38         // packages adding non-system search paths to link against libraries  in main()
39         // that are also found in a system-wide lib dir.  in main()
40         let zlib = pkg_config::Config::new()  in main()  localVariable
43             .probe("zlib");  in main()
44         if zlib.is_ok() {  in main()
58         println!("cargo:rustc-link-lib=z");  in main()
70         || target.contains("pc-windows-gnu")  in main()
80     // pkg-config files that we would find above.  in main()
82     // In any case test if zlib is actually installed and if so we link to it,  in main()
85         println!("cargo:rustc-link-lib=z");  in main()
96     cfg.warnings(false).out_dir(&build).include("src/zlib");  in build_zlib()
98     cfg.file("src/zlib/adler32.c")  in build_zlib()
99         .file("src/zlib/compress.c")  in build_zlib()
100         .file("src/zlib/crc32.c")  in build_zlib()
101         .file("src/zlib/deflate.c")  in build_zlib()
102         .file("src/zlib/infback.c")  in build_zlib()
103         .file("src/zlib/inffast.c")  in build_zlib()
104         .file("src/zlib/inflate.c")  in build_zlib()
105         .file("src/zlib/inftrees.c")  in build_zlib()
106         .file("src/zlib/trees.c")  in build_zlib()
107         .file("src/zlib/uncompr.c")  in build_zlib()
108         .file("src/zlib/zutil.c");  in build_zlib()
110     if !cfg!(feature = "libc") || target == "wasm32-unknown-unknown" {  in build_zlib()
113         cfg.file("src/zlib/gzclose.c")  in build_zlib()
114             .file("src/zlib/gzlib.c")  in build_zlib()
115             .file("src/zlib/gzread.c")  in build_zlib()
116             .file("src/zlib/gzwrite.c");  in build_zlib()
123         cfg.flag("-fvisibility=hidden");  in build_zlib()
136     fs::copy("src/zlib/zlib.h", dst.join("include/zlib.h")).unwrap();  in build_zlib()
137     fs::copy("src/zlib/zconf.h", dst.join("include/zconf.h")).unwrap();  in build_zlib()
140         dst.join("lib/pkgconfig/zlib.pc"),  in build_zlib()
141         fs::read_to_string("src/zlib/zlib.pc.in")  in build_zlib()
151 #[cfg(not(feature = "zlib-ng"))]
154 #[cfg(feature = "zlib-ng")]
156     let install_dir = cmake::Config::new("src/zlib-ng")  in build_zlib_ng()
164         "cargo:rustc-link-search=native={}",  in build_zlib_ng()
171             "zlib"  in build_zlib_ng()
176     println!("cargo:rustc-link-lib=static={}", libname);  in build_zlib_ng()
182 fn try_vcpkg() -> bool {  in try_vcpkg()
187 fn try_vcpkg() -> bool {  in try_vcpkg()
188     // see if there is a vcpkg tree with zlib installed  in try_vcpkg()
191         .lib_names("zlib", "zlib1")  in try_vcpkg()
192         .probe("zlib")  in try_vcpkg()
196             println!("note, vcpkg did not find zlib: {}", e);  in try_vcpkg()
202 fn zlib_installed(cfg: &mut cc::Build) -> bool {  in zlib_installed()
205     cmd.arg("src/smoke.c").arg("-o").arg("/dev/null").arg("-lz");  in zlib_installed()