use std::env; use pyo3_build_config::pyo3_build_script_impl::{cargo_env_var, errors::Result}; use pyo3_build_config::{bail, print_feature_cfgs, InterpreterConfig}; fn ensure_auto_initialize_ok(interpreter_config: &InterpreterConfig) -> Result<()> { if cargo_env_var("CARGO_FEATURE_AUTO_INITIALIZE").is_some() && !interpreter_config.shared { bail!( "The `auto-initialize` feature is enabled, but your python installation only supports \ embedding the Python interpreter statically. If you are attempting to run tests, or a \ binary which is okay to link dynamically, install a Python distribution which ships \ with the Python shared library.\n\ \n\ Embedding the Python interpreter statically does not yet have first-class support in \ PyO3. If you are sure you intend to do this, disable the `auto-initialize` feature.\n\ \n\ For more information, see \ https://pyo3.rs/v{pyo3_version}/\ building_and_distribution.html#embedding-python-in-rust", pyo3_version = env::var("CARGO_PKG_VERSION").unwrap() ); } Ok(()) } /// Prepares the PyO3 crate for compilation. /// /// This loads the config from pyo3-build-config and then makes some additional checks to improve UX /// for users. /// /// Emits the cargo configuration based on this config as well as a few checks of the Rust compiler /// version to enable features which aren't supported on MSRV. fn configure_pyo3() -> Result<()> { let interpreter_config = pyo3_build_config::get(); interpreter_config.emit_pyo3_cfgs(); ensure_auto_initialize_ok(interpreter_config)?; // Emit cfgs like `thread_local_const_init` print_feature_cfgs(); Ok(()) } fn main() { if let Err(e) = configure_pyo3() { eprintln!("error: {}", e.report()); std::process::exit(1) } }