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cargo:rustc-check-cfg=CHECK_CFG
for pyo3
s config names (#4163)
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();
ensure_auto_initialize_ok(interpreter_config)?;
for cfg in interpreter_config.build_script_outputs() {
println!("{}", cfg)
}
// Emit cfgs like `invalid_from_utf8_lint`
print_feature_cfgs();
Ok(())
}
fn main() {
pyo3_build_config::print_expected_cfgs();
if let Err(e) = configure_pyo3() {
eprintln!("error: {}", e.report());
std::process::exit(1)
}
}
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