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wasmer/lib/c-api/build.rs
Nick Lewycky 1b3254cf6a Move the generated-by comment up to the first comment.
2020-10-23 11:16:30 -07:00

392 lines
15 KiB
Rust
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use cbindgen::{Builder, Language};
use std::{env, fs, path::PathBuf};
const PRE_HEADER: &'static str = r#"
// Define the `ARCH_X86_X64` constant.
#if defined(MSVC) && defined(_M_AMD64)
# define ARCH_X86_64
#elif (defined(GCC) || defined(__GNUC__) || defined(__clang__)) && defined(__x86_64__)
# define ARCH_X86_64
#endif
// Compatibility with non-Clang compilers.
#if !defined(__has_attribute)
# define __has_attribute(x) 0
#endif
// Compatibility with non-Clang compilers.
#if !defined(__has_declspec_attribute)
# define __has_declspec_attribute(x) 0
#endif
// Define the `DEPRECATED` macro.
#if defined(GCC) || defined(__GNUC__) || __has_attribute(deprecated)
# define DEPRECATED(message) __attribute__((deprecated(message)))
#elif defined(MSVC) || __has_declspec_attribute(deprecated)
# define DEPRECATED(message) __declspec(deprecated(message))
#endif
"#;
#[allow(unused)]
const JIT_FEATURE_AS_C_DEFINE: &'static str = "WASMER_JIT_ENABLED";
#[allow(unused)]
const COMPILER_FEATURE_AS_C_DEFINE: &'static str = "WASMER_COMPILER_ENABLED";
#[allow(unused)]
const WASI_FEATURE_AS_C_DEFINE: &'static str = "WASMER_WASI_ENABLED";
#[allow(unused)]
const EMSCRIPTEN_FEATURE_AS_C_DEFINE: &'static str = "WASMER_EMSCRIPTEN_ENABLED";
macro_rules! map_feature_as_c_define {
($feature:expr, $c_define:ident, $accumulator:ident) => {
#[cfg(feature = $feature)]
{
$accumulator.push_str(&format!(
r#"
// The `{feature}` feature has been enabled for this build.
#define {define}
"#,
feature = $feature,
define = $c_define,
));
}
};
}
fn main() {
let crate_dir = env::var("CARGO_MANIFEST_DIR").unwrap();
let out_dir = env::var("OUT_DIR").unwrap();
build_wasm_c_api_headers(&crate_dir, &out_dir);
build_wasmer_headers(&crate_dir, &out_dir);
}
/// Build the header files for the `wasm_c_api` API.
fn build_wasm_c_api_headers(crate_dir: &str, out_dir: &str) {
let mut crate_header_file = PathBuf::from(crate_dir);
crate_header_file.push("wasmer_wasm");
let mut out_header_file = PathBuf::from(out_dir);
out_header_file.push("wasmer_wasm");
let mut pre_header = format!(
r#"// The Wasmer C/C++ header file compatible with the `wasm-c-api` standard API.
// This file is generated by lib/c-api/build.rs.
#if !defined(WASMER_WASM_H_MACROS)
#define WASMER_WASM_H_MACROS
{pre_header}"#,
pre_header = PRE_HEADER
);
map_feature_as_c_define!("jit", JIT_FEATURE_AS_C_DEFINE, pre_header);
map_feature_as_c_define!("compiler", COMPILER_FEATURE_AS_C_DEFINE, pre_header);
map_feature_as_c_define!("wasi", WASI_FEATURE_AS_C_DEFINE, pre_header);
map_feature_as_c_define!("emscripten", EMSCRIPTEN_FEATURE_AS_C_DEFINE, pre_header);
// Close pre header.
pre_header.push_str(
r#"
#endif // WASMER_WASM_H_MACROS
//
// OK, here we go. The code below is automatically generated.
//
"#,
);
let guard = "WASMER_WASM_H";
// C bindings.
{
// Generate the bindings in the `OUT_DIR`.
out_header_file.set_extension("h");
// Build and generate the header file.
exclude_items_from_deprecated(new_builder(Language::C, crate_dir, guard, &pre_header))
.with_include("wasm.h")
.generate()
.expect("Unable to generate C bindings")
.write_to_file(out_header_file.as_path());
// Copy the generated bindings from `OUT_DIR` to
// `CARGO_MANIFEST_DIR`.
crate_header_file.set_extension("h");
fs::copy(out_header_file.as_path(), crate_header_file.as_path())
.expect("Unable to copy the generated C bindings");
}
}
/// Build the header files for the `deprecated` API.
fn build_wasmer_headers(crate_dir: &str, out_dir: &str) {
let mut crate_header_file = PathBuf::from(crate_dir);
crate_header_file.push("wasmer");
let mut out_header_file = PathBuf::from(out_dir);
out_header_file.push("wasmer");
let mut pre_header = format!(
r#"// The Wasmer C/C++ header file.
#if !defined(WASMER_H_MACROS)
#define WASMER_H_MACROS
{pre_header}"#,
pre_header = PRE_HEADER
);
map_feature_as_c_define!("wasi", WASI_FEATURE_AS_C_DEFINE, pre_header);
map_feature_as_c_define!("emscritpen", EMSCRIPTEN_FEATURE_AS_C_DEFINE, pre_header);
// Close pre header.
pre_header.push_str(
r#"#endif // WASMER_H_MACROS
//
// OK, here we go. The code below is automatically generated.
//
"#,
);
let guard = "WASMER_H";
// C bindings.
{
// Generate the bindings in the `OUT_DIR`.
out_header_file.set_extension("h");
// Build and generate the header file.
exclude_items_from_wasm_c_api(new_builder(Language::C, crate_dir, guard, &pre_header))
.generate()
.expect("Unable to generate C bindings")
.write_to_file(out_header_file.as_path());
// Copy the generated bindings from `OUT_DIR` to
// `CARGO_MANIFEST_DIR`.
crate_header_file.set_extension("h");
fs::copy(out_header_file.as_path(), crate_header_file.as_path())
.expect("Unable to copy the generated C bindings");
}
// C++ bindings.
{
// Generate the bindings in the `OUT_DIR`.
out_header_file.set_extension("hh");
// Build and generate the header file.
exclude_items_from_wasm_c_api(new_builder(Language::Cxx, crate_dir, guard, &pre_header))
.generate()
.expect("Unable to generate C++ bindings")
.write_to_file(out_header_file.as_path());
// Copy the generated bindings from `OUT_DIR` to
// `CARGO_MANIFEST_DIR`.
crate_header_file.set_extension("hh");
fs::copy(out_header_file, crate_header_file)
.expect("Unable to copy the generated C++ bindings");
}
}
/// Create a fresh new `Builder`, already pre-configured.
fn new_builder(language: Language, crate_dir: &str, include_guard: &str, header: &str) -> Builder {
Builder::new()
.with_config(cbindgen::Config {
sort_by: cbindgen::SortKey::Name,
..cbindgen::Config::default()
})
.with_language(language)
.with_crate(crate_dir)
.with_include_guard(include_guard)
.with_header(header)
.with_documentation(true)
.with_define("target_family", "windows", "_WIN32")
.with_define("target_arch", "x86_64", "ARCH_X86_64")
.with_define("feature", "jit", JIT_FEATURE_AS_C_DEFINE)
.with_define("feature", "compiler", COMPILER_FEATURE_AS_C_DEFINE)
.with_define("feature", "wasi", WASI_FEATURE_AS_C_DEFINE)
.with_define("feature", "emscripten", EMSCRIPTEN_FEATURE_AS_C_DEFINE)
}
/// Exclude types and functions from the `deprecated` API.
fn exclude_items_from_deprecated(builder: Builder) -> Builder {
builder
// List of all functions to exclude given by:
//
// `rg 'extern "C" fn' deprecated/` builder = builder
.exclude_item("wasmer_compile")
.exclude_item("wasmer_emscripten_call_main")
.exclude_item("wasmer_emscripten_destroy_globals")
.exclude_item("wasmer_emscripten_generate_import_object")
.exclude_item("wasmer_emscripten_get_globals")
.exclude_item("wasmer_emscripten_set_up")
.exclude_item("wasmer_export_descriptor_kind")
.exclude_item("wasmer_export_descriptor_name")
.exclude_item("wasmer_export_descriptors")
.exclude_item("wasmer_export_descriptors_destroy")
.exclude_item("wasmer_export_descriptors_get")
.exclude_item("wasmer_export_descriptors_len")
.exclude_item("wasmer_export_func_call")
.exclude_item("wasmer_export_func_params")
.exclude_item("wasmer_export_func_params_arity")
.exclude_item("wasmer_export_func_returns")
.exclude_item("wasmer_export_func_returns_arity")
.exclude_item("wasmer_export_kind")
.exclude_item("wasmer_export_name")
.exclude_item("wasmer_export_to_func")
.exclude_item("wasmer_export_to_memory")
.exclude_item("wasmer_exports_destroy")
.exclude_item("wasmer_exports_get")
.exclude_item("wasmer_exports_len")
.exclude_item("wasmer_global_destroy")
.exclude_item("wasmer_global_get")
.exclude_item("wasmer_global_get_descriptor")
.exclude_item("wasmer_global_new")
.exclude_item("wasmer_global_set")
.exclude_item("wasmer_import_descriptor_kind")
.exclude_item("wasmer_import_descriptor_module_name")
.exclude_item("wasmer_import_descriptor_name")
.exclude_item("wasmer_import_descriptors")
.exclude_item("wasmer_import_descriptors_destroy")
.exclude_item("wasmer_import_descriptors_get")
.exclude_item("wasmer_import_descriptors_len")
.exclude_item("wasmer_import_func_destroy")
.exclude_item("wasmer_import_func_new")
.exclude_item("wasmer_import_func_params")
.exclude_item("wasmer_import_func_params_arity")
.exclude_item("wasmer_import_func_returns")
.exclude_item("wasmer_import_func_returns_arity")
.exclude_item("wasmer_import_object_destroy")
.exclude_item("wasmer_import_object_extend")
.exclude_item("wasmer_import_object_get_import")
.exclude_item("wasmer_import_object_imports_destroy")
.exclude_item("wasmer_import_object_iter_at_end")
.exclude_item("wasmer_import_object_iter_destroy")
.exclude_item("wasmer_import_object_iter_next")
.exclude_item("wasmer_import_object_iterate_functions")
.exclude_item("wasmer_import_object_new")
.exclude_item("wasmer_import_object_new")
.exclude_item("wasmer_instance_call")
.exclude_item("wasmer_instance_context_data_get")
.exclude_item("wasmer_instance_context_data_set")
.exclude_item("wasmer_instance_context_get")
.exclude_item("wasmer_instance_context_memory")
.exclude_item("wasmer_instance_destroy")
.exclude_item("wasmer_instance_exports")
.exclude_item("wasmer_instantiate")
.exclude_item("wasmer_memory_data")
.exclude_item("wasmer_memory_data_length")
.exclude_item("wasmer_memory_destroy")
.exclude_item("wasmer_memory_grow")
.exclude_item("wasmer_memory_length")
.exclude_item("wasmer_memory_new")
.exclude_item("wasmer_module_deserialize")
.exclude_item("wasmer_module_destroy")
.exclude_item("wasmer_module_import_instantiate")
.exclude_item("wasmer_module_instantiate")
.exclude_item("wasmer_module_serialize")
.exclude_item("wasmer_serialized_module_bytes")
.exclude_item("wasmer_serialized_module_destroy")
.exclude_item("wasmer_serialized_module_from_bytes")
.exclude_item("wasmer_table_destroy")
.exclude_item("wasmer_table_grow")
.exclude_item("wasmer_table_length")
.exclude_item("wasmer_table_new")
.exclude_item("wasmer_trampoline_buffer_builder_add_callinfo_trampoline")
.exclude_item("wasmer_trampoline_buffer_builder_add_context_trampoline")
.exclude_item("wasmer_trampoline_buffer_builder_build")
.exclude_item("wasmer_trampoline_buffer_builder_new")
.exclude_item("wasmer_trampoline_buffer_destroy")
.exclude_item("wasmer_trampoline_buffer_get_trampoline")
.exclude_item("wasmer_trampoline_get_context")
.exclude_item("wasmer_trap")
.exclude_item("wasmer_validate")
.exclude_item("wasmer_wasi_generate_default_import_object")
.exclude_item("wasmer_wasi_generate_import_object")
.exclude_item("wasmer_wasi_generate_import_object_for_version")
.exclude_item("wasmer_wasi_get_version")
// List of all structs and enums to exclude given by:
//
// `rg 'pub (enum|struct|union)' deprecated/`
.exclude_item("NamedExportDescriptors(Vec<NamedExportDescriptor>)")
.exclude_item("NamedImportDescriptors(Vec<ImportType>)")
.exclude_item("Version")
.exclude_item("WasmerImportObjectIterator")
.exclude_item("wasmer_byte_array")
.exclude_item("wasmer_emscripten_globals_t")
.exclude_item("wasmer_export_descriptor_t")
.exclude_item("wasmer_export_descriptors_t")
.exclude_item("wasmer_export_func_t")
.exclude_item("wasmer_export_t")
.exclude_item("wasmer_exports_t")
.exclude_item("wasmer_global_descriptor_t")
.exclude_item("wasmer_global_t")
.exclude_item("wasmer_import_descriptor_t")
.exclude_item("wasmer_import_descriptors_t")
.exclude_item("wasmer_import_export_kind")
.exclude_item("wasmer_import_func_t")
.exclude_item("wasmer_import_object_iter_t")
.exclude_item("wasmer_import_object_t")
.exclude_item("wasmer_import_t")
.exclude_item("wasmer_instance_context_t")
.exclude_item("wasmer_instance_t")
.exclude_item("wasmer_limit_option_t")
.exclude_item("wasmer_limits_t")
.exclude_item("wasmer_memory_t")
.exclude_item("wasmer_module_t")
.exclude_item("wasmer_result_t")
.exclude_item("wasmer_serialized_module_t")
.exclude_item("wasmer_table_t")
.exclude_item("wasmer_trampoline_buffer_builder_t")
.exclude_item("wasmer_trampoline_buffer_t")
.exclude_item("wasmer_trampoline_callable_t")
.exclude_item("wasmer_value_t")
.exclude_item("wasmer_value_tag")
.exclude_item("wasmer_wasi_map_dir_entry_t")
}
/// Excludes non-standard types and functions of the `wasm_c_api` API.
///
/// All items defined in `wasm.h` are ignored by cbindgen already
/// based on `cbindgen:ignore` instructions, because we don't want
/// duplications. We must exclude extra non-standard items, like the
/// ones from the WASI API.
fn exclude_items_from_wasm_c_api(builder: Builder) -> Builder {
builder
.exclude_item("wasi_config_arg")
.exclude_item("wasi_config_env")
.exclude_item("wasi_config_mapdir")
.exclude_item("wasi_config_preopen_dir")
.exclude_item("wasi_config_inherit_stderr")
.exclude_item("wasi_config_inherit_stdin")
.exclude_item("wasi_config_inherit_stdout")
.exclude_item("wasi_config_new")
.exclude_item("wasi_config_t")
.exclude_item("wasi_env_delete")
.exclude_item("wasi_env_new")
.exclude_item("wasi_env_read_stderr")
.exclude_item("wasi_env_read_stdout")
.exclude_item("wasi_env_set_instance")
.exclude_item("wasi_env_set_memory")
.exclude_item("wasi_env_t")
.exclude_item("wasi_get_imports")
.exclude_item("wasi_get_imports_inner")
.exclude_item("wasi_get_start_function")
.exclude_item("wasi_get_wasi_version")
.exclude_item("wasi_version_t")
.exclude_item("wasm_config_set_compiler")
.exclude_item("wasm_config_set_engine")
.exclude_item("wasm_module_name")
.exclude_item("wasm_module_set_name")
.exclude_item("wasmer_compiler_t")
.exclude_item("wasmer_engine_t")
.exclude_item("wat2wasm")
}
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