mirror of
https://github.com/fluencelabs/wasmer
synced 2025-03-19 17:40:50 +00:00
67b684ac85
Clang can emulate GNUC or MSVC behaviors. So instead of detecting whether Clang is used to compile the code, it's better to detect the targeted features are available. Code proposed by @nlewycky, thanks!
108 lines
3.5 KiB
Rust
108 lines
3.5 KiB
Rust
extern crate cbindgen;
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use cbindgen::{Builder, Language};
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use std::{env, fs, path::PathBuf};
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fn main() {
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let crate_dir = env::var("CARGO_MANIFEST_DIR").unwrap();
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let mut crate_wasmer_header_file = PathBuf::from(&crate_dir);
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crate_wasmer_header_file.push("wasmer");
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let out_dir = env::var("OUT_DIR").unwrap();
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let mut out_wasmer_header_file = PathBuf::from(&out_dir);
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out_wasmer_header_file.push("wasmer");
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let mut pre_header = r#"
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#if !defined(WASMER_H_MACROS)
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#define WASMER_H_MACROS
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// Define the `ARCH_X86_X64` constant.
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#if defined(MSVC) && defined(_M_AMD64)
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# define ARCH_X86_64
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#elif (defined(GCC) || defined(__GNUC__) || defined(__clang__)) && defined(__x86_64__)
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# define ARCH_X86_64
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#endif
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// Compatibility with non-Clang compilers.
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#if !defined(__has_attribute)
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# define __has_attribute(x) 0
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#endif
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// Compatibility with non-Clang compilers.
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#if !defined(__has_declspec_attribute)
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# define __has_declspec_attribute(x) 0
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#endif
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// Define the `DEPRECATED` macro.
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#if defined(GCC) || defined(__GNUC__) || __has_attribute(deprecated)
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# define DEPRECATED(message) __attribute__((deprecated(message)))
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#elif defined(MSVC) || __has_declspec_attribute(deprecated)
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# define DEPRECATED(message) __declspec(deprecated(message))
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#endif
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"#
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.to_string();
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#[cfg(feature = "wasi")]
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{
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pre_header += "#define WASMER_WASI_ENABLED\n";
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}
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#[cfg(feature = "emscripten")]
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{
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pre_header += "#define WASMER_EMSCRIPTEN_ENABLED\n";
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}
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// Close pre header.
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pre_header += "#endif // WASMER_H_MACROS\n";
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// Generate the C bindings in the `OUT_DIR`.
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out_wasmer_header_file.set_extension("h");
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Builder::new()
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.with_crate(crate_dir.clone())
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.with_language(Language::C)
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.with_include_guard("WASMER_H")
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.with_header(&pre_header)
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.with_define("target_family", "windows", "_WIN32")
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.with_define("target_arch", "x86_64", "ARCH_X86_64")
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.with_define("feature", "wasi", "WASMER_WASI_ENABLED")
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.with_define("feature", "emscripten", "WASMER_EMSCRIPTEN_ENABLED")
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.generate()
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.expect("Unable to generate C bindings")
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.write_to_file(out_wasmer_header_file.as_path());
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// Generate the C++ bindings in the `OUT_DIR`.
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out_wasmer_header_file.set_extension("hh");
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Builder::new()
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.with_crate(crate_dir)
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.with_language(Language::Cxx)
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.with_include_guard("WASMER_H")
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.with_header(&pre_header)
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.with_define("target_family", "windows", "_WIN32")
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.with_define("target_arch", "x86_64", "ARCH_X86_64")
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.with_define("feature", "wasi", "WASMER_WASI_ENABLED")
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.with_define("feature", "emscripten", "WASMER_EMSCRIPTEN_ENABLED")
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.generate()
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.expect("Unable to generate C++ bindings")
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.write_to_file(out_wasmer_header_file.as_path());
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// Copy the generated C bindings from `OUT_DIR` to
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// `CARGO_MANIFEST_DIR`.
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crate_wasmer_header_file.set_extension("h");
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out_wasmer_header_file.set_extension("h");
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fs::copy(
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out_wasmer_header_file.as_path(),
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crate_wasmer_header_file.as_path(),
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)
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.expect("Unable to copy the generated C bindings");
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// Copy the generated C++ bindings from `OUT_DIR` to
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// `CARGO_MANIFEST_DIR`.
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crate_wasmer_header_file.set_extension("h");
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crate_wasmer_header_file.set_extension("hh");
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out_wasmer_header_file.set_extension("hh");
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fs::copy(out_wasmer_header_file, crate_wasmer_header_file)
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.expect("Unable to copy the generated C++ bindings");
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}
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