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build.rs
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build.rs
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#[cfg(feature = "generate_bindings")]
extern crate bindgen;
extern crate cc;
use std::env;
fn main() {
let mut build = cc::Build::new();
build.include("vendor/VulkanMemoryAllocator/include");
build.include("vendor/Vulkan-Headers/include");
// Disable VMA_ASSERT when rust assertions are disabled
#[cfg(not(debug_assertions))]
build.define("NDEBUG", "");
// We want to use the loader in ash, instead of requiring us to link
// in vulkan.dll/.dylib in addition to ash. This is especially important
// for MoltenVK, where there is no default installation path, unlike
// Linux (pkconfig) and Windows (VULKAN_SDK environment variable).
build.define("VMA_STATIC_VULKAN_FUNCTIONS", "0");
// This prevents VMA from trying to fetch any remaining pointers
// that are still null after using the loader in ash, which can
// cause linker errors.
build.define("VMA_DYNAMIC_VULKAN_FUNCTIONS", "0");
// TODO: Add some configuration options under crate features
//#define VMA_HEAVY_ASSERT(expr) assert(expr)
//#define VMA_USE_STL_CONTAINERS 1
//#define VMA_DEDICATED_ALLOCATION 0
//#define VMA_DEBUG_MARGIN 16
//#define VMA_DEBUG_DETECT_CORRUPTION 1
//#define VMA_DEBUG_INITIALIZE_ALLOCATIONS 1
//#define VMA_DEBUG_MIN_BUFFER_IMAGE_GRANULARITY 256
#[cfg(feature = "recording")]
build.define("VMA_RECORDING_ENABLED", "1");
// Add the files we build
build.file("wrapper.cpp");
let target = env::var("TARGET").unwrap();
if target.contains("darwin") {
build
.flag("-std=c++17")
.flag("-Wno-missing-field-initializers")
.flag("-Wno-unused-variable")
.flag("-Wno-unused-parameter")
.flag("-Wno-unused-private-field")
.flag("-Wno-reorder")
.flag("-Wno-nullability-completeness")
.cpp_link_stdlib("c++")
.cpp_set_stdlib("c++")
.cpp(true);
} else if target.contains("ios") {
build
.flag("-std=c++17")
.flag("-Wno-missing-field-initializers")
.flag("-Wno-unused-variable")
.flag("-Wno-unused-parameter")
.flag("-Wno-unused-private-field")
.flag("-Wno-reorder")
.cpp_link_stdlib("c++")
.cpp_set_stdlib("c++")
.cpp(true);
} else if target.contains("android") {
build
.flag("-std=c++17")
.flag("-Wno-missing-field-initializers")
.flag("-Wno-unused-variable")
.flag("-Wno-unused-parameter")
.flag("-Wno-unused-private-field")
.flag("-Wno-reorder")
.cpp_link_stdlib("c++")
.cpp(true);
} else if target.contains("linux") {
build
.flag("-std=c++17")
.flag("-Wno-missing-field-initializers")
.flag("-Wno-unused-variable")
.flag("-Wno-unused-parameter")
.flag("-Wno-unused-private-field")
.flag("-Wno-reorder")
.cpp_link_stdlib("stdc++")
.cpp(true);
} else if target.contains("windows") && target.contains("gnu") {
build
.flag("-std=c++17")
.flag("-Wno-missing-field-initializers")
.flag("-Wno-unused-variable")
.flag("-Wno-unused-parameter")
.flag("-Wno-unused-private-field")
.flag("-Wno-reorder")
.flag("-Wno-type-limits")
.cpp_link_stdlib("stdc++")
.cpp(true);
}
build.compile("vma");
generate_bindings("src/ffi.rs");
}
#[cfg(feature = "generate_bindings")]
fn generate_bindings(output_file: &str) {
let bindings = bindgen::Builder::default()
.clang_arg("-I./wrapper")
.clang_arg("-I./vendor/Vulkan-Headers/include")
.header("vendor/VulkanMemoryAllocator/include/vk_mem_alloc.h")
.formatter(bindgen::Formatter::Rustfmt)
.size_t_is_usize(true)
.blocklist_type("__darwin_.*")
.allowlist_function("vma.*")
.allowlist_function("PFN_vma.*")
.allowlist_type("Vma.*")
.parse_callbacks(Box::new(FixAshTypes))
.blocklist_type("Vk.*")
.blocklist_type("PFN_vk.*")
.raw_line("#![allow(non_camel_case_types)]")
.raw_line("#![allow(non_snake_case)]")
.raw_line("#![allow(dead_code)]")
.raw_line("use ash::vk::*;")
.trust_clang_mangling(false)
.layout_tests(false)
.rustified_enum("Vma.*")
.generate()
.expect("Unable to generate bindings!");
bindings
.write_to_file(std::path::Path::new(output_file))
.expect("Unable to write bindings!");
}
#[cfg(not(feature = "generate_bindings"))]
fn generate_bindings(_: &str) {}
#[cfg(feature = "generate_bindings")]
#[derive(Debug)]
struct FixAshTypes;
#[cfg(feature = "generate_bindings")]
impl bindgen::callbacks::ParseCallbacks for FixAshTypes {
fn item_name(&self, original_item_name: &str) -> Option<String> {
if original_item_name.starts_with("Vk") {
// Strip `Vk` prefix, will use `ash::vk::*` instead
let trimmed_name = original_item_name.trim_start_matches("Vk");
if ["AllocationCallbacks"].contains(&trimmed_name) {
Some(format!("{}<'static>", trimmed_name))
} else {
Some(trimmed_name.to_string())
}
} else if original_item_name.starts_with("PFN_vk") && original_item_name.ends_with("KHR") {
// VMA uses a few extensions like `PFN_vkGetBufferMemoryRequirements2KHR`,
// ash keeps these as `PFN_vkGetBufferMemoryRequirements2`
Some(original_item_name.trim_end_matches("KHR").to_string())
} else {
None
}
}
// When ignoring `Vk` types, bindgen loses derives for some type. Quick workaround.
fn add_derives(&self, info: &bindgen::callbacks::DeriveInfo<'_>) -> Vec<String> {
if info.name.starts_with("VmaAllocationInfo")
|| info.name.starts_with("VmaDefragmentationStats")
{
vec!["Debug".into(), "Copy".into(), "Clone".into()]
} else {
vec![]
}
}
}