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bootstrap: Fix jemalloc 64K page support for aarch64 tools #145353

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Merged
merged 1 commit into from
Aug 15, 2025
Merged

bootstrap: Fix jemalloc 64K page support for aarch64 tools #145353

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1 change: 1 addition & 0 deletions src/bootstrap/src/core/build_steps/compile.rs
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Expand Up @@ -1391,6 +1391,7 @@ pub fn rustc_cargo_env(builder: &Builder<'_>, cargo: &mut Cargo, target: TargetS

// Build jemalloc on AArch64 with support for page sizes up to 64K
// See: https://github.com/rust-lang/rust/pull/135081
// See also the "JEMALLOC_SYS_WITH_LG_PAGE" setting in the tool build step.
if builder.config.jemalloc(target)
&& target.starts_with("aarch64")
&& env::var_os("JEMALLOC_SYS_WITH_LG_PAGE").is_none()
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8 changes: 8 additions & 0 deletions src/bootstrap/src/core/build_steps/tool.rs
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Expand Up @@ -257,6 +257,14 @@ pub fn prepare_tool_cargo(
// own copy
cargo.env("LZMA_API_STATIC", "1");

// Build jemalloc on AArch64 with support for page sizes up to 64K
// See: https://github.com/rust-lang/rust/pull/135081
// Note that `miri` always uses jemalloc. As such, there is no checking of the jemalloc build flag.
// See also the "JEMALLOC_SYS_WITH_LG_PAGE" setting in the compile build step.
if target.starts_with("aarch64") && env::var_os("JEMALLOC_SYS_WITH_LG_PAGE").is_none() {
cargo.env("JEMALLOC_SYS_WITH_LG_PAGE", "16");
}

// CFG_RELEASE is needed by rustfmt (and possibly other tools) which
// import rustc-ap-rustc_attr which requires this to be set for the
// `#[cfg(version(...))]` attribute.
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