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Fix cross-compilation from unix to windows

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This commit is contained in:
David Hewitt 2020-05-12 21:24:51 +01:00
parent 987e83bc59
commit 3fa1639b8c
1 changed files with 16 additions and 15 deletions
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31
build.rs
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@ -171,7 +171,6 @@ fn cross_compiling() -> Result<Option<CrossCompileConfig>> {
///
/// (hrm, this is sort of re-implementing what distutils does, except
/// by passing command line args instead of referring to a python.h)
#[cfg(not(target_os = "windows"))]
static SYSCONFIG_FLAGS: [&str; 7] = [
"Py_USING_UNICODE",
"Py_UNICODE_WIDE",
@ -443,8 +442,11 @@ fn load_cross_compile_info(
/// Examine python's compile flags to pass to cfg by launching
/// the interpreter and printing variables of interest from
/// sysconfig.get_config_vars.
#[cfg(not(target_os = "windows"))]
fn get_config_vars(python_path: &Path) -> Result<HashMap<String, String>> {
if env::var("CARGO_CFG_TARGET_OS").unwrap() == "windows" {
return get_config_vars_windows(python_path);
}
let mut script = "import sysconfig; \
config = sysconfig.get_config_vars();"
.to_owned();
@ -478,8 +480,7 @@ fn get_config_vars(python_path: &Path) -> Result<HashMap<String, String>> {
Ok(fix_config_map(all_vars))
}
#[cfg(target_os = "windows")]
fn get_config_vars(_: &Path) -> Result<HashMap<String, String>> {
fn get_config_vars_windows(_: &Path) -> Result<HashMap<String, String>> {
// sysconfig is missing all the flags on windows, so we can't actually
// query the interpreter directly for its build flags.
//
@ -567,9 +568,15 @@ fn get_library_link_name(version: &PythonVersion, ld_version: &str) -> String {
}
}
#[cfg(not(target_os = "macos"))]
#[cfg(not(target_os = "windows"))]
fn get_rustc_link_lib(config: &InterpreterConfig) -> Result<String> {
match env::var("CARGO_CFG_TARGET_OS").unwrap().as_str() {
"windows" => get_rustc_link_lib_windows(config),
"macos" => get_rustc_link_lib_macos(config),
_ => get_rustc_link_lib_unix(config),
}
}
fn get_rustc_link_lib_unix(config: &InterpreterConfig) -> Result<String> {
if config.shared {
Ok(format!(
"cargo:rustc-link-lib={}",
@ -583,7 +590,6 @@ fn get_rustc_link_lib(config: &InterpreterConfig) -> Result<String> {
}
}
#[cfg(target_os = "macos")]
fn get_macos_linkmodel(config: &InterpreterConfig) -> Result<String> {
// PyPy 3.6 ships with a shared library, but doesn't have Py_ENABLE_SHARED.
if config.version.implementation == PythonInterpreterKind::PyPy {
@ -604,8 +610,7 @@ else:
Ok(out.trim_end().to_owned())
}
#[cfg(target_os = "macos")]
fn get_rustc_link_lib(config: &InterpreterConfig) -> Result<String> {
fn get_rustc_link_lib_macos(config: &InterpreterConfig) -> Result<String> {
// os x can be linked to a framework or static or dynamic, and
// Py_ENABLE_SHARED is wrong; framework means shared library
let link_name = get_library_link_name(&config.version, &config.ld_version);
@ -617,8 +622,7 @@ fn get_rustc_link_lib(config: &InterpreterConfig) -> Result<String> {
}
}
#[cfg(target_os = "windows")]
fn get_rustc_link_lib(config: &InterpreterConfig) -> Result<String> {
fn get_rustc_link_lib_windows(config: &InterpreterConfig) -> Result<String> {
// Py_ENABLE_SHARED doesn't seem to be present on windows.
Ok(format!(
"cargo:rustc-link-lib=pythonXY:{}",
@ -733,7 +737,7 @@ fn configure(interpreter_config: &InterpreterConfig) -> Result<String> {
println!("{}", get_rustc_link_lib(&interpreter_config)?);
if let Some(libdir) = &interpreter_config.libdir {
println!("cargo:rustc-link-search=native={}", libdir);
} else if cfg!(target_os = "windows") {
} else if target_os == "windows" {
println!(
"cargo:rustc-link-search=native={}\\libs",
interpreter_config.base_prefix
@ -818,9 +822,6 @@ fn main() -> Result<()> {
// Detecting if cross-compiling by checking if the target triple is different from the host
// rustc's triple.
let (interpreter_config, mut config_map) = if let Some(paths) = cross_compiling()? {
// If cross compiling we need the path to the cross-compiled include dir and lib dir, else
// fail quickly and loudly
load_cross_compile_info(paths)?
} else {
find_interpreter_and_get_config()?