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use std::env;
use std::fs;
use std::path::PathBuf;
fn link(name: &str, bundled: bool) {
use std::env::var;
let target = var("TARGET").unwrap();
let target: Vec<_> = target.split('-').collect();
if target.get(2) == Some(&"windows") {
println!("cargo:rustc-link-lib=dylib={}", name);
if bundled && target.get(3) == Some(&"gnu") {
let dir = var("CARGO_MANIFEST_DIR").unwrap();
println!("cargo:rustc-link-search=native={}/{}", dir, target[0]);
}
}
}
fn fail_on_empty_directory(name: &str) {
if fs::read_dir(name).unwrap().count() == 0 {
println!(
"The `{}` directory is empty, did you forget to pull the submodules?",
name
);
println!("Try `git submodule update --init --recursive`");
panic!();
}
}
fn rocksdb_include_dir() -> String {
match env::var("ROCKSDB_INCLUDE_DIR") {
Ok(val) => val,
Err(_) => "rocksdb/include".to_string(),
}
}
fn bindgen_rocksdb() {
let bindings = bindgen::Builder::default()
.header(rocksdb_include_dir() + "/rocksdb/c.h")
.derive_debug(false)
.blacklist_type("max_align_t") // https://github.com/rust-lang-nursery/rust-bindgen/issues/550
.ctypes_prefix("libc")
.size_t_is_usize(true)
.generate()
.expect("unable to generate rocksdb bindings");
let out_path = PathBuf::from(env::var("OUT_DIR").unwrap());
bindings
.write_to_file(out_path.join("bindings.rs"))
.expect("unable to write rocksdb bindings");
}
fn build_rocksdb() {
let target = env::var("TARGET").unwrap();
let mut config = cc::Build::new();
config.include("rocksdb/include/");
config.include("rocksdb/");
config.include("rocksdb/third-party/gtest-1.8.1/fused-src/");
if cfg!(feature = "snappy") {
config.define("SNAPPY", Some("1"));
config.include("snappy/");
}
if cfg!(feature = "lz4") {
config.define("LZ4", Some("1"));
config.include("lz4/lib/");
}
if cfg!(feature = "zstd") {
config.define("ZSTD", Some("1"));
config.include("zstd/lib/");
config.include("zstd/lib/dictBuilder/");
}
if cfg!(feature = "zlib") {
config.define("ZLIB", Some("1"));
config.include("zlib/");
}
if cfg!(feature = "bzip2") {
config.define("BZIP2", Some("1"));
config.include("bzip2/");
}
config.include(".");
config.define("NDEBUG", Some("1"));
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let mut lib_sources = include_str!("rocksdb_lib_sources.txt")
.trim()
.split('\n')
.map(str::trim)
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.collect::<Vec<&'static str>>();
// We have a pregenerated a version of build_version.cc in the local directory
lib_sources = lib_sources
.iter()
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.cloned()
.filter(|file| *file != "util/build_version.cc")
.collect::<Vec<&'static str>>();
if target.contains("x86_64") {
// This is needed to enable hardware CRC32C. Technically, SSE 4.2 is
// only available since Intel Nehalem (about 2010) and AMD Bulldozer
// (about 2011).
config.define("HAVE_SSE42", Some("1"));
config.flag_if_supported("-msse2");
config.flag_if_supported("-msse4.1");
config.flag_if_supported("-msse4.2");
if !target.contains("android") {
config.define("HAVE_PCLMUL", Some("1"));
config.flag_if_supported("-mpclmul");
}
}
if target.contains("darwin") {
config.define("OS_MACOSX", None);
config.define("ROCKSDB_PLATFORM_POSIX", None);
config.define("ROCKSDB_LIB_IO_POSIX", None);
} else if target.contains("android") {
config.define("OS_ANDROID", None);
config.define("ROCKSDB_PLATFORM_POSIX", None);
config.define("ROCKSDB_LIB_IO_POSIX", None);
} else if target.contains("linux") {
config.define("OS_LINUX", None);
config.define("ROCKSDB_PLATFORM_POSIX", None);
config.define("ROCKSDB_LIB_IO_POSIX", None);
} else if target.contains("freebsd") {
config.define("OS_FREEBSD", None);
config.define("ROCKSDB_PLATFORM_POSIX", None);
config.define("ROCKSDB_LIB_IO_POSIX", None);
} else if target.contains("windows") {
link("rpcrt4", false);
link("shlwapi", false);
config.define("DWIN32", None);
config.define("OS_WIN", None);
config.define("_MBCS", None);
config.define("WIN64", None);
config.define("NOMINMAX", None);
if &target == "x86_64-pc-windows-gnu" {
// Tell MinGW to create localtime_r wrapper of localtime_s function.
config.define("_POSIX_C_SOURCE", Some("1"));
// Tell MinGW to use at least Windows Vista headers instead of the ones of Windows XP.
// (This is minimum supported version of rocksdb)
config.define("_WIN32_WINNT", Some("_WIN32_WINNT_VISTA"));
}
// Remove POSIX-specific sources
lib_sources = lib_sources
.iter()
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.cloned()
.filter(|file| {
!matches!(
*file,
"port/port_posix.cc"
| "env/env_posix.cc"
| "env/fs_posix.cc"
| "env/io_posix.cc"
)
})
.collect::<Vec<&'static str>>();
// Add Windows-specific sources
lib_sources.push("port/win/port_win.cc");
lib_sources.push("port/win/env_win.cc");
lib_sources.push("port/win/env_default.cc");
lib_sources.push("port/win/win_logger.cc");
lib_sources.push("port/win/io_win.cc");
lib_sources.push("port/win/win_thread.cc");
}
if target.contains("msvc") {
config.flag("-EHsc");
} else {
config.flag(&cxx_standard());
// this was breaking the build on travis due to
// > 4mb of warnings emitted.
config.flag("-Wno-unused-parameter");
}
for file in lib_sources {
let file = "rocksdb/".to_string() + file;
config.file(&file);
}
config.file("build_version.cc");
config.cpp(true);
config.compile("librocksdb.a");
}
fn build_snappy() {
let target = env::var("TARGET").unwrap();
let endianness = env::var("CARGO_CFG_TARGET_ENDIAN").unwrap();
let mut config = cc::Build::new();
config.include("snappy/");
config.include(".");
config.define("NDEBUG", Some("1"));
config.extra_warnings(false);
if target.contains("msvc") {
config.flag("-EHsc");
} else {
// Snappy requires C++11.
// See: https://github.com/google/snappy/blob/master/CMakeLists.txt#L32-L38
config.flag("-std=c++11");
}
if endianness == "big" {
config.define("SNAPPY_IS_BIG_ENDIAN", Some("1"));
}
config.file("snappy/snappy.cc");
config.file("snappy/snappy-sinksource.cc");
config.file("snappy/snappy-c.cc");
config.cpp(true);
config.compile("libsnappy.a");
}
fn build_lz4() {
let mut compiler = cc::Build::new();
compiler
.file("lz4/lib/lz4.c")
.file("lz4/lib/lz4frame.c")
.file("lz4/lib/lz4hc.c")
.file("lz4/lib/xxhash.c");
compiler.opt_level(3);
let target = env::var("TARGET").unwrap();
if &target == "i686-pc-windows-gnu" {
compiler.flag("-fno-tree-vectorize");
}
compiler.compile("liblz4.a");
}
fn build_zstd() {
let mut compiler = cc::Build::new();
compiler.include("zstd/lib/");
compiler.include("zstd/lib/common");
compiler.include("zstd/lib/legacy");
let globs = &[
"zstd/lib/common/*.c",
"zstd/lib/compress/*.c",
"zstd/lib/decompress/*.c",
"zstd/lib/dictBuilder/*.c",
"zstd/lib/legacy/*.c",
];
for pattern in globs {
for path in glob::glob(pattern).unwrap() {
let path = path.unwrap();
compiler.file(path);
}
}
compiler.opt_level(3);
compiler.extra_warnings(false);
compiler.define("ZSTD_LIB_DEPRECATED", Some("0"));
compiler.compile("libzstd.a");
}
fn build_zlib() {
let mut compiler = cc::Build::new();
let globs = &["zlib/*.c"];
for pattern in globs {
for path in glob::glob(pattern).unwrap() {
let path = path.unwrap();
compiler.file(path);
}
}
compiler.flag_if_supported("-Wno-implicit-function-declaration");
compiler.opt_level(3);
compiler.extra_warnings(false);
compiler.compile("libz.a");
}
fn build_bzip2() {
let mut compiler = cc::Build::new();
compiler
.file("bzip2/blocksort.c")
.file("bzip2/bzlib.c")
.file("bzip2/compress.c")
.file("bzip2/crctable.c")
.file("bzip2/decompress.c")
.file("bzip2/huffman.c")
.file("bzip2/randtable.c");
compiler
.define("_FILE_OFFSET_BITS", Some("64"))
.define("BZ_NO_STDIO", None);
compiler.extra_warnings(false);
compiler.opt_level(3);
compiler.extra_warnings(false);
compiler.compile("libbz2.a");
}
fn try_to_find_and_link_lib(lib_name: &str) -> bool {
if let Ok(v) = env::var(&format!("{}_COMPILE", lib_name)) {
if v.to_lowercase() == "true" || v == "1" {
return false;
}
}
if let Ok(lib_dir) = env::var(&format!("{}_LIB_DIR", lib_name)) {
println!("cargo:rustc-link-search=native={}", lib_dir);
let mode = match env::var_os(&format!("{}_STATIC", lib_name)) {
Some(_) => "static",
None => "dylib",
};
println!("cargo:rustc-link-lib={}={}", mode, lib_name.to_lowercase());
return true;
}
false
}
fn cxx_standard() -> String {
env::var("ROCKSDB_CXX_STD").map_or("-std=c++11".to_owned(), |cxx_std| {
if !cxx_std.starts_with("-std=") {
format!("-std={}", cxx_std)
} else {
cxx_std
}
})
}
fn main() {
bindgen_rocksdb();
if !try_to_find_and_link_lib("ROCKSDB") {
println!("cargo:rerun-if-changed=rocksdb/");
fail_on_empty_directory("rocksdb");
build_rocksdb();
} else {
let target = env::var("TARGET").unwrap();
// according to https://github.com/alexcrichton/cc-rs/blob/master/src/lib.rs#L2189
if target.contains("apple") || target.contains("freebsd") || target.contains("openbsd") {
println!("cargo:rustc-link-lib=dylib=c++");
} else if target.contains("linux") {
println!("cargo:rustc-link-lib=dylib=stdc++");
}
}
if cfg!(feature = "snappy") && !try_to_find_and_link_lib("SNAPPY") {
println!("cargo:rerun-if-changed=snappy/");
fail_on_empty_directory("snappy");
build_snappy();
}
if cfg!(feature = "lz4") && !try_to_find_and_link_lib("LZ4") {
println!("cargo:rerun-if-changed=lz4/");
fail_on_empty_directory("lz4");
build_lz4();
}
if cfg!(feature = "zstd") && !try_to_find_and_link_lib("ZSTD") {
println!("cargo:rerun-if-changed=zstd/");
fail_on_empty_directory("zstd");
build_zstd();
}
if cfg!(feature = "zlib") && !try_to_find_and_link_lib("Z") {
println!("cargo:rerun-if-changed=zlib/");
fail_on_empty_directory("zlib");
build_zlib();
}
if cfg!(feature = "bzip2") && !try_to_find_and_link_lib("BZ2") {
println!("cargo:rerun-if-changed=bzip2/");
fail_on_empty_directory("bzip2");
build_bzip2();
}
}