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embed-bitcode is no longer used in iOS

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DianQK 2024-11-20 22:45:32 +08:00
parent 0b1bf71a71
commit 3a23669787
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2 changed files with 6 additions and 26 deletions
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19
compiler/rustc_codegen_llvm/src/back/write.rs
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@ -955,24 +955,7 @@ pub(crate) fn bitcode_section_name(cgcx: &CodegenContext<LlvmCodegenBackend>) ->
}
}
/// Embed the bitcode of an LLVM module in the LLVM module itself.
///
/// This is done primarily for iOS where it appears to be standard to compile C
/// code at least with `-fembed-bitcode` which creates two sections in the
/// executable:
///
/// * __LLVM,__bitcode
/// * __LLVM,__cmdline
///
/// It appears *both* of these sections are necessary to get the linker to
/// recognize what's going on. A suitable cmdline value is taken from the
/// target spec.
///
/// Furthermore debug/O1 builds don't actually embed bitcode but rather just
/// embed an empty section.
///
/// Basically all of this is us attempting to follow in the footsteps of clang
/// on iOS. See #35968 for lots more info.
/// Embed the bitcode of an LLVM module for LTO in the LLVM module itself.
unsafe fn embed_bitcode(
cgcx: &CodegenContext<LlvmCodegenBackend>,
llcx: &llvm::Context,