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set LIBC_CHECK_CFG=1 when building Rust code in bootstrap

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Pietro Albini 2023-03-08 12:14:19 +01:00
parent 64165aac68
commit ead8b96281
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1 changed files with 9 additions and 0 deletions
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9
src/bootstrap/builder.rs
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@ -1718,6 +1718,15 @@ impl<'a> Builder<'a> {
cargo.env("RUSTC_VERBOSE", self.verbosity.to_string()); cargo.env("RUSTC_VERBOSE", self.verbosity.to_string());
// Downstream forks of the Rust compiler might want to use a custom libc to add support for
// targets that are not yet available upstream. Adding a patch to replace libc with a
// custom one would cause compilation errors though, because Cargo would interpret the
// custom libc as part of the workspace, and apply the check-cfg lints on it.
//
// The libc build script emits check-cfg flags only when this environment variable is set,
// so this line allows the use of custom libcs.
cargo.env("LIBC_CHECK_CFG", "1");
if source_type == SourceType::InTree { if source_type == SourceType::InTree {
let mut lint_flags = Vec::new(); let mut lint_flags = Vec::new();
// When extending this list, add the new lints to the RUSTFLAGS of the // When extending this list, add the new lints to the RUSTFLAGS of the