1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
|
use std::env;
use std::fs;
use std::path::PathBuf;
use std::process::Command;
fn main() {
println!("cargo:rerun-if-env-changed=LIBZ_SYS_STATIC");
println!("cargo:rerun-if-changed=build.rs");
let host = env::var("HOST").unwrap();
let target = env::var("TARGET").unwrap();
let host_and_target_contain = |s| host.contains(s) && target.contains(s);
let want_ng = cfg!(feature = "zlib-ng") && !cfg!(feature = "stock-zlib");
if want_ng && target != "wasm32-unknown-unknown" {
return build_zlib_ng(&target, true);
}
// Don't run pkg-config if we're linking statically (we'll build below) and
// also don't run pkg-config on macOS/FreeBSD/DragonFly. That'll end up printing
// `-L /usr/lib` which wreaks havoc with linking to an OpenSSL in /usr/local/lib
// (Homebrew, Ports, etc.)
let want_static =
cfg!(feature = "static") || env::var("LIBZ_SYS_STATIC").unwrap_or(String::new()) == "1";
if !want_static &&
!target.contains("msvc") && // pkg-config just never works here
!(host_and_target_contain("apple") ||
host_and_target_contain("freebsd") ||
host_and_target_contain("dragonfly"))
{
// Don't print system lib dirs to cargo since this interferes with other
// packages adding non-system search paths to link against libraries
// that are also found in a system-wide lib dir.
let zlib = pkg_config::Config::new()
.cargo_metadata(true)
.print_system_libs(false)
.probe("zlib");
match zlib {
Ok(_) => return,
Err(e) => {
println!("cargo-warning={}", e.to_string())
}
}
}
if target.contains("msvc") {
if try_vcpkg() {
return;
}
}
// All android compilers should come with libz by default, so let's just use
// the one already there. Likewise, Haiku always ships with libz, so we can
// link to it even when cross-compiling.
if target.contains("android") || target.contains("haiku") {
println!("cargo:rustc-link-lib=z");
return;
}
let mut cfg = cc::Build::new();
// Situations where we build unconditionally.
//
// MSVC basically never has it preinstalled, MinGW picks up a bunch of weird
// paths we don't like, `want_static` may force us, and cross compiling almost
// never has a prebuilt version.
//
// Apple platforms have libz.1.dylib, and it's usually available even when
// cross compiling (via fat binary or in the target's Xcode SDK)
let cross_compiling = target != host;
let apple_to_apple = host.contains("-apple-") && target.contains("-apple-");
if target.contains("msvc")
|| target.contains("pc-windows-gnu")
|| want_static
|| (cross_compiling && !apple_to_apple)
{
return build_zlib(&mut cfg, &target);
}
// If we've gotten this far we're probably a pretty standard platform.
// Almost all platforms here ship libz by default, but some don't have
// pkg-config files that we would find above.
//
// In any case test if zlib is actually installed and if so we link to it,
// otherwise continue below to build things.
if zlib_installed(&mut cfg) {
println!("cargo:rustc-link-lib=z");
return;
}
build_zlib(&mut cfg, &target)
}
fn build_zlib(cfg: &mut cc::Build, target: &str) {
let dst = PathBuf::from(env::var_os("OUT_DIR").unwrap());
let lib = dst.join("lib");
cfg.warnings(false).out_dir(&lib).include("src/zlib");
cfg.file("src/zlib/adler32.c")
.file("src/zlib/compress.c")
.file("src/zlib/crc32.c")
.file("src/zlib/deflate.c")
.file("src/zlib/infback.c")
.file("src/zlib/inffast.c")
.file("src/zlib/inflate.c")
.file("src/zlib/inftrees.c")
.file("src/zlib/trees.c")
.file("src/zlib/uncompr.c")
.file("src/zlib/zutil.c");
if !cfg!(feature = "libc") || target.starts_with("wasm32") {
cfg.define("Z_SOLO", None);
} else {
cfg.file("src/zlib/gzclose.c")
.file("src/zlib/gzlib.c")
.file("src/zlib/gzread.c")
.file("src/zlib/gzwrite.c");
}
if !target.contains("windows") {
cfg.define("STDC", None);
cfg.define("_LARGEFILE64_SOURCE", None);
cfg.define("_POSIX_SOURCE", None);
cfg.flag("-fvisibility=hidden");
}
if target.contains("apple") {
cfg.define("_C99_SOURCE", None);
}
if target.contains("solaris") {
cfg.define("_XOPEN_SOURCE", "700");
}
cfg.compile("z");
fs::create_dir_all(dst.join("include")).unwrap();
fs::copy("src/zlib/zlib.h", dst.join("include/zlib.h")).unwrap();
fs::copy("src/zlib/zconf.h", dst.join("include/zconf.h")).unwrap();
fs::create_dir_all(lib.join("pkgconfig")).unwrap();
fs::write(
lib.join("pkgconfig/zlib.pc"),
fs::read_to_string("src/zlib/zlib.pc.in")
.unwrap()
.replace("@prefix@", dst.to_str().unwrap()),
)
.unwrap();
println!("cargo:root={}", dst.to_str().unwrap());
println!("cargo:rustc-link-search=native={}", lib.to_str().unwrap());
println!("cargo:include={}/include", dst.to_str().unwrap());
}
#[cfg(not(feature = "zlib-ng"))]
fn build_zlib_ng(_target: &str, _compat: bool) {}
#[cfg(feature = "zlib-ng")]
mod build_zng;
#[cfg(feature = "zlib-ng")]
use build_zng::build_zlib_ng;
#[cfg(not(target_env = "msvc"))]
fn try_vcpkg() -> bool {
false
}
#[cfg(target_env = "msvc")]
fn try_vcpkg() -> bool {
// see if there is a vcpkg tree with zlib installed
match vcpkg::Config::new()
.emit_includes(true)
.lib_names("zlib", "zlib1")
.probe("zlib")
{
Ok(_) => true,
Err(e) => {
println!("note, vcpkg did not find zlib: {}", e);
false
}
}
}
fn zlib_installed(cfg: &mut cc::Build) -> bool {
let compiler = cfg.get_compiler();
let mut cmd = Command::new(compiler.path());
cmd.arg("src/smoke.c").arg("-o").arg("/dev/null").arg("-lz");
println!("running {:?}", cmd);
if let Ok(status) = cmd.status() {
if status.success() {
return true;
}
}
false
}
|
