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// This Source Code Form is subject to the terms of the Mozilla Public
// License, v. 2.0. If a copy of the MPL was not distributed with this
// file, You can obtain one at http://mozilla.org/MPL/2.0/.
use std::env;
// This code is adapted from pkg-config-rs
// (https://github.com/rust-lang/pkg-config-rs).
#[cfg(feature = "cuda")]
#[allow(clippy::if_same_then_else, clippy::needless_bool)]
fn infer_static(name: &str) -> bool {
if std::env::var(format!("{}_STATIC", name.to_uppercase())).is_ok() {
true
} else if std::env::var(format!("{}_DYNAMIC", name.to_uppercase())).is_ok() {
false
} else if std::env::var("PKG_CONFIG_ALL_STATIC").is_ok() {
true
} else if std::env::var("PKG_CONFIG_ALL_DYNAMIC").is_ok() {
false
} else {
false
}
}
fn main() {
println!("cargo:rerun-if-changed=build.rs");
#[cfg(all(feature = "cuda", feature = "hip"))]
compile_error!("Both 'cuda' and 'hip' features are enabled; only one can be used.");
#[cfg(all(not(feature = "cuda"), not(feature = "hip"), feature = "gpu-single"))]
compile_error!(
"The 'gpu-single' feature must be used with either of the 'cuda' or 'hip' features."
);
#[cfg(any(feature = "cuda", feature = "hip"))]
gpu::build_and_link();
// Generate a C header for hyperbeam and write it to the include
// directory. This routine only need to be done if the ffi module has
// changed.
let crate_dir = env::var("CARGO_MANIFEST_DIR").unwrap();
println!("cargo:rerun-if-changed=src/fee/ffi/mod.rs");
// Only do this if we're not on docs.rs (doesn't like writing files outside
// of OUT_DIR).
match env::var("DOCS_RS").as_deref() {
Ok("1") => (),
_ => {
// Exclude GPU things if GPU features aren't enabled.
cfg_if::cfg_if! {
if #[cfg(any(feature = "cuda", feature = "hip"))] {
let export = cbindgen::ExportConfig::default();
} else {
let export = cbindgen::ExportConfig {
exclude: vec![
"FEEBeamGpu".to_string(),
"new_gpu_fee_beam".to_string(),
"fee_calc_jones_gpu".to_string(),
"fee_calc_jones_gpu_device".to_string(),
"fee_calc_jones_gpu_device_inner".to_string(),
"get_fee_tile_map".to_string(),
"get_fee_device_tile_map".to_string(),
"get_fee_freq_map".to_string(),
"get_fee_device_freq_map".to_string(),
"get_num_unique_fee_tiles".to_string(),
"get_num_unique_fee_freqs".to_string(),
"free_gpu_fee_beam".to_string(),
"AnalyticBeamGpu".to_string(),
"new_gpu_analytic_beam".to_string(),
"analytic_calc_jones_gpu".to_string(),
"analytic_calc_jones_gpu_device".to_string(),
"analytic_calc_jones_gpu_device_inner".to_string(),
"get_analytic_tile_map".to_string(),
"get_analytic_device_tile_map".to_string(),
"get_num_unique_analytic_tiles".to_string(),
"free_gpu_analytic_beam".to_string(),
],
..Default::default()
};
}
}
// Rename an internal-only name depending on the GPU precision.
#[cfg(feature = "gpu-single")]
let c_type = "float";
#[cfg(not(feature = "gpu-single"))]
let c_type = "double";
cbindgen::Builder::new()
.with_config({
let mut config = cbindgen::Config::default();
config.cpp_compat = true;
config.pragma_once = true;
config.export = export;
config
})
.with_crate(crate_dir)
.with_language(cbindgen::Language::C)
.rename_item("GpuFloat", c_type)
.generate()
.expect("Unable to generate bindings")
.write_to_file("include/mwa_hyperbeam.h");
}
}
}
#[cfg(any(feature = "cuda", feature = "hip"))]
mod gpu {
/// Search for any C/C++/CUDA files and have rerun-if-changed on all of them.
#[cfg(any(feature = "cuda", feature = "hip"))]
fn rerun_if_changed_c_cpp_gpu_files<P: AsRef<std::path::Path>>(dir: P) {
for path in std::fs::read_dir(dir).expect("dir exists") {
let path = path.expect("is readable").path();
if path.is_dir() {
rerun_if_changed_c_cpp_gpu_files(&path)
}
if let Some("c" | "cpp" | "cu" | "h" | "cuh") =
path.extension().and_then(|os_str| os_str.to_str())
{
println!("cargo:rerun-if-changed={}", path.display());
}
}
}
pub(super) fn build_and_link() {
use std::env;
rerun_if_changed_c_cpp_gpu_files("src/");
#[cfg(feature = "cuda")]
let mut gpu_target = {
const DEFAULT_CUDA_ARCHES: &[u16] = &[60, 70, 80];
const DEFAULT_CUDA_SMS: &[u16] = &[60, 61, 70, 75, 80, 86];
fn parse_and_validate_compute(c: &str, var: &str) -> Vec<u16> {
let mut out = vec![];
for compute in c.trim().split(',') {
// Check that there's only two numeric characters.
if compute.len() != 2 {
panic!("When parsing {var}, found '{compute}', which is not a two-digit number!")
}
match compute.parse() {
Ok(p) => out.push(p),
Err(_) => {
panic!("'{compute}', part of {var}, couldn't be parsed into a number!")
}
}
}
out
}
// Attempt to read HYPERBEAM_CUDA_COMPUTE. HYPERDRIVE_CUDA_COMPUTE can
// be used instead, too.
println!("cargo:rerun-if-env-changed=HYPERBEAM_CUDA_COMPUTE");
println!("cargo:rerun-if-env-changed=HYPERDRIVE_CUDA_COMPUTE");
let (arches, sms): (Vec<u16>, Vec<u16>) = match (
env::var("HYPERBEAM_CUDA_COMPUTE"),
env::var("HYPERDRIVE_CUDA_COMPUTE"),
) {
// When a user-supplied variable exists, use it as the CUDA arch and
// compute level.
(Ok(c), _) | (Err(_), Ok(c)) => {
let compute = parse_and_validate_compute(&c, "HYPERBEAM_CUDA_COMPUTE");
let sms = compute.clone();
(compute, sms)
}
(Err(_), Err(_)) => {
// Print out all of the default arches and computes as a
// warning.
println!("cargo:warning=No HYPERBEAM_CUDA_COMPUTE; Passing arch=compute_{DEFAULT_CUDA_ARCHES:?} and code=sm_{DEFAULT_CUDA_SMS:?} to nvcc");
(DEFAULT_CUDA_ARCHES.to_vec(), DEFAULT_CUDA_SMS.to_vec())
}
};
let mut cuda_target = cc::Build::new();
cuda_target
.cuda(true)
.cudart("shared") // We handle linking cudart statically
.include("src/gpu_common/")
.include("src/fee/gpu/")
.file("src/fee/gpu/fee.cu")
.include("src/analytic/gpu/")
.file("src/analytic/gpu/analytic.cu");
// If $CXX is not set but $CUDA_PATH is, search for
// $CUDA_PATH/bin/g++ and if it exists, set that as $CXX.
if env::var_os("CXX").is_none() {
// Unlike above, we care about $CUDA_PATH being unicode.
if let Ok(cuda_path) = env::var("CUDA_PATH") {
// Look for the g++ that CUDA wants.
let compiler = std::path::PathBuf::from(cuda_path).join("bin/g++");
if compiler.exists() {
println!("cargo:warning=Setting $CXX to {}", compiler.display());
env::set_var("CXX", compiler.into_os_string());
}
}
}
// Loop over each arch and sm
for arch in arches {
for &sm in &sms {
if sm < arch {
continue;
}
cuda_target.flag("-gencode");
cuda_target.flag(&format!("arch=compute_{arch},code=sm_{sm}"));
}
}
if crate::infer_static("cuda") {
// CUDA ships its static library as cudart_static.a, not cudart.a
println!("cargo:rustc-link-lib=static=cudart_static");
}
#[cfg(feature = "cuda-static")]
println!("cargo:rustc-link-lib=static=cudart_static");
cuda_target
};
#[cfg(feature = "hip")]
let mut gpu_target = {
let hip_path = hip_sys::hiprt::get_hip_path();
// It seems that various ROCm releases change where hipcc is...
let mut compiler = hip_path.join("bin/hipcc");
if !compiler.exists() {
// Try the dir above, which might be the ROCm dir.
compiler = hip_path.join("../bin/hipcc");
}
let mut hip_target = cc::Build::new();
hip_target
.compiler(compiler)
.include(hip_path.join("include/hip"))
.include("src/gpu_common/")
.file("src/fee/gpu/fee.cu")
.file("src/analytic/gpu/analytic.cu");
hip_target
};
gpu_target.define(
// The DEBUG env. variable is set by cargo. If running "cargo build
// --release", DEBUG is "false", otherwise "true". C/C++/CUDA like
// the compile option "NDEBUG" to be defined when using assert.h, so
// if appropriate, define that here. We also define "DEBUG" so that
// can be used.
match env::var("DEBUG").as_deref() {
Ok("false") => "NDEBUG",
_ => "DEBUG",
},
None,
);
// Break in case of emergency.
// gpu_target.debug(true);
// If we're told to, use single-precision floats. The default in the GPU
// code is to use double-precision.
#[cfg(feature = "gpu-single")]
gpu_target.define("SINGLE", None);
gpu_target.compile("hyperbeam_gpu");
}
}