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Allow getting no_std from the config file #69381

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Merged
merged 2 commits into from
Feb 26, 2020
Merged

Allow getting no_std from the config file #69381

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03ca0e2
Allow getting `no_std` from the config file
Ericson2314 Feb 22, 2020
4f15867
bootstrap: Further centralize target defaulting logic.
Ericson2314 Feb 25, 2020
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3 changes: 3 additions & 0 deletions src/bootstrap/config.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -353,6 +353,7 @@ struct TomlTarget {
musl_root: Option<String>,
wasi_root: Option<String>,
qemu_rootfs: Option<String>,
no_std: Option<bool>,
}

impl Config {
Expand Down Expand Up @@ -615,6 +616,8 @@ impl Config {
target.musl_root = cfg.musl_root.clone().map(PathBuf::from);
target.wasi_root = cfg.wasi_root.clone().map(PathBuf::from);
target.qemu_rootfs = cfg.qemu_rootfs.clone().map(PathBuf::from);
target.no_std =
cfg.no_std.unwrap_or(triple.contains("-none-") || triple.contains("nvptx"));
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Hm, is -none- perhaps a bit too broad? I guess we presumably don't ship any platforms with that triple today that do have std compiled?

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The logic is taken from if target.contains("-none-") || target.contains("nvptx") {. Some later refactor should just ensure there are Targets for all platforms specified by name, rather than config, so we can deduplicate this.


config.target_config.insert(INTERNER.intern_string(triple.clone()), target);
}
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4 changes: 1 addition & 3 deletions src/bootstrap/sanity.rs
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Expand Up @@ -194,9 +194,7 @@ pub fn check(build: &mut Build) {

if target.contains("-none-") || target.contains("nvptx") {
if build.no_std(*target).is_none() {
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This function looks potentially relevant; is there a reason it's not receiving updates or so?

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@Ericson2314 Ericson2314 Feb 23, 2020 •
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Ah, I should replace the calls to Default::default with a new method that defaults based on the triple. Then this will work as I intended: the defaulting logic happens in one place. and we simply ensure that the target exists here so that the triple-specific defaults rather than triple-agnostic defaults are used.

let target = build.config.target_config.entry(target.clone()).or_default();

target.no_std = true;
build.config.target_config.entry(target.clone()).or_default();
}

if build.no_std(*target) == Some(false) {
Expand Down