80 lines
2.8 KiB
Rust
80 lines
2.8 KiB
Rust
// Bitcoin secp256k1 bindings
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// Written in 2015 by
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// Andrew Poelstra
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//
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// To the extent possible under law, the author(s) have dedicated all
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// copyright and related and neighboring rights to this software to
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// the public domain worldwide. This software is distributed without
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// any warranty.
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//
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// You should have received a copy of the CC0 Public Domain Dedication
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// along with this software.
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// If not, see <http://creativecommons.org/publicdomain/zero/1.0/>.
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//
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//! # Build script
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// Coding conventions
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#![deny(non_upper_case_globals)]
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#![deny(non_camel_case_types)]
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#![deny(non_snake_case)]
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#![deny(unused_mut)]
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#![warn(missing_docs)]
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extern crate cc;
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use std::env;
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fn main() {
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// Check whether we can use 64-bit compilation
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let use_64bit_compilation = if env::var("CARGO_CFG_TARGET_POINTER_WIDTH").unwrap() == "64" {
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let check = cc::Build::new().file("depend/check_uint128_t.c")
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.cargo_metadata(false)
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.try_compile("check_uint128_t")
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.is_ok();
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if !check {
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println!("cargo:warning=Compiling in 32-bit mode on a 64-bit architecture due to lack of uint128_t support.");
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}
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check
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} else {
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false
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};
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// Actual build
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let mut base_config = cc::Build::new();
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base_config.include("depend/secp256k1/")
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.include("depend/secp256k1/include")
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.include("depend/secp256k1/src")
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.debug(true)
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.flag_if_supported("-Wno-unused-function") // some ecmult stuff is defined but not used upstream
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.define("SECP256K1_BUILD", Some("1"))
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// TODO these three should be changed to use libgmp, at least until secp PR 290 is merged
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.define("USE_NUM_NONE", Some("1"))
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.define("USE_FIELD_INV_BUILTIN", Some("1"))
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.define("USE_SCALAR_INV_BUILTIN", Some("1"))
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.define("USE_ENDOMORPHISM", Some("1"))
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.define("ENABLE_MODULE_ECDH", Some("1"))
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.define("ENABLE_MODULE_RECOVERY", Some("1"));
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if let Ok(target_endian) = env::var("CARGO_CFG_TARGET_ENDIAN") {
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if target_endian == "big" {
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base_config.define("WORDS_BIGENDIAN", Some("1"));
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}
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}
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if use_64bit_compilation {
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base_config.define("USE_FIELD_5X52", Some("1"))
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.define("USE_SCALAR_4X64", Some("1"))
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.define("HAVE___INT128", Some("1"));
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} else {
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base_config.define("USE_FIELD_10X26", Some("1"))
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.define("USE_SCALAR_8X32", Some("1"));
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}
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// secp256k1
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base_config.file("depend/secp256k1/contrib/lax_der_parsing.c")
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.file("depend/secp256k1/src/secp256k1.c")
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.compile("libsecp256k1.a");
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}
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