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rustc_target: Add convenience functions for adding linker arguments

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They ensure that lld and non-lld linker flavors get the same set of arguments
This commit is contained in:
Vadim Petrochenkov 2022-06-17 17:38:42 +03:00
parent 8aab472d52
commit 46aba8850b
74 changed files with 347 additions and 419 deletions
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38
compiler/rustc_target/src/spec/mod.rs
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@ -1459,6 +1459,44 @@ pub struct TargetOptions {
pub supports_stack_protector: bool,
}
/// Add arguments for the given flavor and also for its "twin" flavors
/// that have a compatible command line interface.
fn add_link_args(link_args: &mut LinkArgs, flavor: LinkerFlavor, args: &[&'static str]) {
let mut insert = |flavor| {
link_args.entry(flavor).or_default().extend(args.iter().copied().map(Cow::Borrowed))
};
insert(flavor);
match flavor {
LinkerFlavor::Ld => insert(LinkerFlavor::Lld(LldFlavor::Ld)),
LinkerFlavor::Msvc => insert(LinkerFlavor::Lld(LldFlavor::Link)),
LinkerFlavor::Lld(LldFlavor::Wasm) => {}
LinkerFlavor::Lld(lld_flavor) => {
panic!("add_link_args: use non-LLD flavor for {:?}", lld_flavor)
}
LinkerFlavor::Gcc
| LinkerFlavor::Em
| LinkerFlavor::L4Bender
| LinkerFlavor::BpfLinker
| LinkerFlavor::PtxLinker => {}
}
}
impl TargetOptions {
fn link_args(flavor: LinkerFlavor, args: &[&'static str]) -> LinkArgs {
let mut link_args = LinkArgs::new();
add_link_args(&mut link_args, flavor, args);
link_args
}
fn add_pre_link_args(&mut self, flavor: LinkerFlavor, args: &[&'static str]) {
add_link_args(&mut self.pre_link_args, flavor, args);
}
fn add_post_link_args(&mut self, flavor: LinkerFlavor, args: &[&'static str]) {
add_link_args(&mut self.post_link_args, flavor, args);
}
}
impl Default for TargetOptions {
/// Creates a set of "sane defaults" for any target. This is still
/// incomplete, and if used for compilation, will certainly not work.