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IPHONEOS_DEPLOYMENT_TARGET not followed for some object files #137326

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joao-victor-silva opened this issue Feb 20, 2025 · 5 comments
Open

IPHONEOS_DEPLOYMENT_TARGET not followed for some object files #137326

joao-victor-silva opened this issue Feb 20, 2025 · 5 comments
Labels
C-bug Category: This is a bug. needs-triage This issue may need triage. Remove it if it has been sufficiently triaged. O-ios Operating system: iOS

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@joao-victor-silva
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I'm developing a internal SDK and I have to build it for iOS:

IPHONEOS_DEPLOYMENT_TARGET=13.0 cargo build --target=aarch64-apple-ios

I expected the static library output would follow the IPHONEOS_DEPLOYMENT_TARGET all the way through when checking with otool:

Expected output 

Archive : target/aarch64-apple-ios/debug/libmylibrary.a
target/aarch64-apple-ios/debug/libmylibrary.a(mylibrary.001qxyu3qsjczz20kuhn46b2i.rcgu.o):
Load command 0
      cmd LC_SEGMENT_64
  cmdsize 1112
  segname 
   vmaddr 0x0000000000000000
   vmsize 0x000000000000107a
  fileoff 1272
 filesize 4218
  maxprot rwx
 initprot rwx
   nsects 13
    flags (none)
Section
  sectname __text
   segname __TEXT
      addr 0x0000000000000000
      size 0x0000000000000014
    offset 1272
     align 2^2 (4)
    reloff 5496
    nreloc 1
      type S_REGULAR
attributes PURE_INSTRUCTIONS SOME_INSTRUCTIONS
 reserved1 0
 reserved2 0
Section
  sectname __debug_loc
   segname __DWARF
      addr 0x0000000000000014
      size 0x0000000000000039
    offset 1292
     align 2^0 (1)
    reloff 0
    nreloc 0
      type S_REGULAR
attributes DEBUG
 reserved1 0
 reserved2 0
Section
  sectname __debug_abbrev
   segname __DWARF
      addr 0x000000000000004d
      size 0x00000000000000d2
    offset 1349
     align 2^0 (1)
    reloff 0
    nreloc 0
      type S_REGULAR
attributes DEBUG
 reserved1 0
 reserved2 0
Section
  sectname __debug_info
   segname __DWARF
      addr 0x000000000000011f
      size 0x0000000000000463
    offset 1559
     align 2^0 (1)
    reloff 5504
    nreloc 2
      type S_REGULAR
attributes DEBUG
 reserved1 0
 reserved2 0
Section
  sectname __debug_aranges
   segname __DWARF
      addr 0x0000000000000582
      size 0x0000000000000030
    offset 2682
     align 2^0 (1)
    reloff 5520
    nreloc 1
      type S_REGULAR
attributes DEBUG
 reserved1 0
 reserved2 0
Section
  sectname __debug_str
   segname __DWARF
      addr 0x00000000000005b2
      size 0x00000000000004b4
    offset 2730
     align 2^0 (1)
    reloff 0
    nreloc 0
      type S_REGULAR
attributes DEBUG
 reserved1 0
 reserved2 0
Section
  sectname __apple_names
   segname __DWARF
      addr 0x0000000000000a66
      size 0x0000000000000058
    offset 3934
     align 2^0 (1)
    reloff 0
    nreloc 0
      type S_REGULAR
attributes DEBUG
 reserved1 0
 reserved2 0
Section
  sectname __apple_objc
   segname __DWARF
      addr 0x0000000000000abe
      size 0x0000000000000024
    offset 4022
     align 2^0 (1)
    reloff 0
    nreloc 0
      type S_REGULAR
attributes DEBUG
 reserved1 0
 reserved2 0
Section
  sectname __apple_namespac
   segname __DWARF
      addr 0x0000000000000ae2
      size 0x0000000000000198
    offset 4058
     align 2^0 (1)
    reloff 0
    nreloc 0
      type S_REGULAR
attributes DEBUG
 reserved1 0
 reserved2 0
Section
  sectname __apple_types
   segname __DWARF
      addr 0x0000000000000c7a
      size 0x00000000000002e0
    offset 4466
     align 2^0 (1)
    reloff 0
    nreloc 0
      type S_REGULAR
attributes DEBUG
 reserved1 0
 reserved2 0
Section
  sectname __compact_unwind
   segname __LD
      addr 0x0000000000000f60
      size 0x0000000000000020
    offset 5208
     align 2^3 (8)
    reloff 5528
    nreloc 1
      type S_REGULAR
attributes DEBUG
 reserved1 0
 reserved2 0
Section
  sectname __eh_frame
   segname __TEXT
      addr 0x0000000000000f80
      size 0x0000000000000048
    offset 5240
     align 2^3 (8)
    reloff 5536
    nreloc 2
      type S_COALESCED
attributes NO_TOC STRIP_STATIC_SYMS LIVE_SUPPORT
 reserved1 0
 reserved2 0
Section
  sectname __debug_line
   segname __DWARF
      addr 0x0000000000000fc8
      size 0x00000000000000b2
    offset 5312
     align 2^0 (1)
    reloff 5552
    nreloc 1
      type S_REGULAR
attributes DEBUG
 reserved1 0
 reserved2 0
Load command 1
      cmd LC_BUILD_VERSION
  cmdsize 24
 platform IOS
    minos 13.0
      sdk n/a
   ntools 0
Load command 2
     cmd LC_SYMTAB
 cmdsize 24
  symoff 5560
   nsyms 6
  stroff 5656
 strsize 256
Load command 3
            cmd LC_DYSYMTAB
        cmdsize 80
      ilocalsym 0
      nlocalsym 4
     iextdefsym 4
     nextdefsym 1
      iundefsym 5
      nundefsym 1
         tocoff 0
           ntoc 0
      modtaboff 0
        nmodtab 0
   extrefsymoff 0
    nextrefsyms 0
 indirectsymoff 0
  nindirectsyms 0
      extreloff 0
        nextrel 0
      locreloff 0
        nlocrel 0
...

Instead, some object files were compile with a different IOS target version (17.2) as we can see in the minos of LC_BUILD_VERSION:

Actual output 

target/aarch64-apple-ios/debug/libmylibrary.a(f3c5cc7ab326d4d0-atomic_thread_fence.o):
Load command 0
      cmd LC_SEGMENT_64
  cmdsize 872
  segname 
   vmaddr 0x0000000000000000
   vmsize 0x00000000000004bb
  fileoff 1048
 filesize 1211
  maxprot rwx
 initprot rwx
   nsects 10
    flags (none)
Section
  sectname __text
   segname __TEXT
      addr 0x0000000000000000
      size 0x0000000000000034
    offset 1048
     align 2^2 (4)
    reloff 2264
    nreloc 2
      type S_REGULAR
attributes PURE_INSTRUCTIONS SOME_INSTRUCTIONS
 reserved1 0
 reserved2 0
Section
  sectname __const
   segname __TEXT
      addr 0x0000000000000034
      size 0x0000000000000005
    offset 1100
     align 2^0 (1)
    reloff 0
    nreloc 0
      type S_REGULAR
attributes (none)
 reserved1 0
 reserved2 0
Section
  sectname __debug_abbrev
   segname __DWARF
      addr 0x0000000000000039
      size 0x000000000000006a
    offset 1105
     align 2^0 (1)
    reloff 0
    nreloc 0
      type S_REGULAR
attributes DEBUG
 reserved1 0
 reserved2 0
Section
  sectname __debug_info
   segname __DWARF
      addr 0x00000000000000a3
      size 0x000000000000009b
    offset 1211
     align 2^0 (1)
    reloff 2280
    nreloc 4
      type S_REGULAR
attributes DEBUG
 reserved1 0
 reserved2 0
Section
  sectname __debug_str
   segname __DWARF
      addr 0x000000000000013e
      size 0x00000000000001b9
    offset 1366
     align 2^0 (1)
    reloff 0
    nreloc 0
      type S_REGULAR
attributes DEBUG
 reserved1 0
 reserved2 0
Section
  sectname __apple_names
   segname __DWARF
      addr 0x00000000000002f7
      size 0x000000000000003c
    offset 1807
     align 2^0 (1)
    reloff 0
    nreloc 0
      type S_REGULAR
attributes DEBUG
 reserved1 0
 reserved2 0
Section
  sectname __apple_objc
   segname __DWARF
      addr 0x0000000000000333
      size 0x0000000000000024
    offset 1867
     align 2^0 (1)
    reloff 0
    nreloc 0
      type S_REGULAR
attributes DEBUG
 reserved1 0
 reserved2 0
Section
  sectname __apple_namespac
   segname __DWARF
      addr 0x0000000000000357
      size 0x0000000000000024
    offset 1903
     align 2^0 (1)
    reloff 0
    nreloc 0
      type S_REGULAR
attributes DEBUG
 reserved1 0
 reserved2 0
Section
  sectname __apple_types
   segname __DWARF
      addr 0x000000000000037b
      size 0x000000000000004e
    offset 1939
     align 2^0 (1)
    reloff 0
    nreloc 0
      type S_REGULAR
attributes DEBUG
 reserved1 0
 reserved2 0
Section
  sectname __debug_line
   segname __DWARF
      addr 0x00000000000003c9
      size 0x00000000000000f2
    offset 2017
     align 2^0 (1)
    reloff 2312
    nreloc 1
      type S_REGULAR
attributes DEBUG
 reserved1 0
 reserved2 0
Load command 1
      cmd LC_BUILD_VERSION
  cmdsize 24
 platform IOS
    minos 17.2
      sdk 17.2
   ntools 0
Load command 2
      cmd LC_LINKER_OPTIMIZATION_HINT
  cmdsize 16
  dataoff 2320
 datasize 8
Load command 3
     cmd LC_SYMTAB
 cmdsize 24
  symoff 2328
   nsyms 3
  stroff 2376
 strsize 40
Load command 4
            cmd LC_DYSYMTAB
        cmdsize 80
      ilocalsym 0
      nlocalsym 2
     iextdefsym 2
     nextdefsym 1
      iundefsym 3
      nundefsym 0
         tocoff 0
           ntoc 0
      modtaboff 0
        nmodtab 0
   extrefsymoff 0
    nextrefsyms 0
 indirectsymoff 0
  nindirectsyms 0
      extreloff 0
        nextrel 0
      locreloff 0
        nlocrel 0

...

In total 1578 but only 145 had these behavior of setting the minos 17.2. Is this behavior expected?

Meta

rustc --version --verbose:

rustc 1.84.1 (e71f9a9a9 2025-01-27)
binary: rustc
commit-hash: e71f9a9a98b0faf423844bf0ba7438f29dc27d58
commit-date: 2025-01-27
host: x86_64-apple-darwin
release: 1.84.1
LLVM version: 19.1.5

Addtional information that can be relevant:

  • In this project I use OpenSSL v3 compilied locally and exposed to the SDK by a sys crate for it, the bindings for the OpenSSL code were done using bindgen (ref)
  • I also use UniFFI to generate native bindings to Swift (ref)

#129432
#53808
@joao-victor-silva joao-victor-silva added the C-bug Category: This is a bug. label Feb 20, 2025
@rustbot rustbot added the needs-triage This issue may need triage. Remove it if it has been sufficiently triaged. label Feb 20, 2025
@jieyouxu jieyouxu added the O-ios Operating system: iOS label Feb 20, 2025
@bjorn3
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bjorn3 commented Feb 21, 2025

Those object files are part of the precompiled compiler-builtins crate. They probably need to be compiled with IPHONEOS_DEPLOYMENT_TARGET set to the minimum iOS version we support.

@joao-victor-silva
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joao-victor-silva commented Feb 21, 2025 •
edited
Loading

Good, I'm trying to validate this but so far I didn't find the usage of the compiler-builtins crate, I've tryied the command cargo tree --target=aarch64-apple-ios --all-features and I've got the following output:

cargo tree output 
mylibrary v0.1.0
├── log v0.4.22
├── objc2-foundation v0.2.2
│   ├── bitflags v2.6.0
│   └── objc2 v0.5.2
│       ├── objc-sys v0.3.5
│       └── objc2-encode v4.0.3
├── openssl-sys v0.1.0
│   [build-dependencies]
│   └── bindgen v0.69.4
│       ├── bitflags v2.6.0
│       ├── cexpr v0.6.0
│       │   └── nom v7.1.3
│       │       ├── memchr v2.7.4
│       │       └── minimal-lexical v0.2.1
│       ├── clang-sys v1.8.1
│       │   ├── glob v0.3.1
│       │   ├── libc v0.2.158
│       │   └── libloading v0.8.5
│       │       └── cfg-if v1.0.0
│       │   [build-dependencies]
│       │   └── glob v0.3.1
│       ├── itertools v0.12.1
│       │   └── either v1.13.0
│       ├── lazy_static v1.5.0
│       ├── lazycell v1.3.0
│       ├── log v0.4.22
│       ├── prettyplease v0.2.20
│       │   ├── proc-macro2 v1.0.86
│       │   │   └── unicode-ident v1.0.12
│       │   └── syn v2.0.72
│       │       ├── proc-macro2 v1.0.86 (*)
│       │       ├── quote v1.0.36
│       │       │   └── proc-macro2 v1.0.86 (*)
│       │       └── unicode-ident v1.0.12
│       ├── proc-macro2 v1.0.86 (*)
│       ├── quote v1.0.36 (*)
│       ├── regex v1.10.6
│       │   ├── regex-automata v0.4.7
│       │   │   └── regex-syntax v0.8.4
│       │   └── regex-syntax v0.8.4
│       ├── rustc-hash v1.1.0
│       ├── shlex v1.3.0
│       ├── syn v2.0.72 (*)
│       └── which v4.4.2
│           ├── either v1.13.0
│           ├── home v0.5.9
│           └── rustix v0.38.34
│               ├── bitflags v2.6.0
│               ├── errno v0.3.9
│               │   └── libc v0.2.158
│               └── libc v0.2.158
├── oslog v0.2.0
│   ├── dashmap v5.5.3
│   │   ├── cfg-if v1.0.0
│   │   ├── hashbrown v0.14.5
│   │   ├── lock_api v0.4.12
│   │   │   └── scopeguard v1.2.0
│   │   │   [build-dependencies]
│   │   │   └── autocfg v1.3.0
│   │   ├── once_cell v1.19.0
│   │   └── parking_lot_core v0.9.10
│   │       ├── cfg-if v1.0.0
│   │       ├── libc v0.2.158
│   │       └── smallvec v1.13.2
│   └── log v0.4.22
│   [build-dependencies]
│   └── cc v1.2.1
│       └── shlex v1.3.0
├── thiserror v1.0.63
│   └── thiserror-impl v1.0.63 (proc-macro)
│       ├── proc-macro2 v1.0.86 (*)
│       ├── quote v1.0.36 (*)
│       └── syn v2.0.72 (*)
├── toml v0.8.19
│   ├── serde v1.0.205
│   │   └── serde_derive v1.0.205 (proc-macro)
│   │       ├── proc-macro2 v1.0.86 (*)
│   │       ├── quote v1.0.36 (*)
│   │       └── syn v2.0.72 (*)
│   ├── serde_spanned v0.6.8
│   │   └── serde v1.0.205 (*)
│   ├── toml_datetime v0.6.8
│   │   └── serde v1.0.205 (*)
│   └── toml_edit v0.22.22
│       ├── indexmap v2.4.0
│       │   ├── equivalent v1.0.1
│       │   └── hashbrown v0.14.5
│       ├── serde v1.0.205 (*)
│       ├── serde_spanned v0.6.8 (*)
│       ├── toml_datetime v0.6.8 (*)
│       └── winnow v0.6.20
└── uniffi v0.28.0
    ├── anyhow v1.0.86
    ├── camino v1.1.7
    │   └── serde v1.0.205 (*)
    ├── clap v4.5.15
    │   ├── clap_builder v4.5.15
    │   │   ├── anstream v0.6.15
    │   │   │   ├── anstyle v1.0.8
    │   │   │   ├── anstyle-parse v0.2.5
    │   │   │   │   └── utf8parse v0.2.2
    │   │   │   ├── anstyle-query v1.1.1
    │   │   │   ├── colorchoice v1.0.2
    │   │   │   ├── is_terminal_polyfill v1.70.1
    │   │   │   └── utf8parse v0.2.2
    │   │   ├── anstyle v1.0.8
    │   │   ├── clap_lex v0.7.2
    │   │   └── strsim v0.11.1
    │   └── clap_derive v4.5.13 (proc-macro)
    │       ├── heck v0.5.0
    │       ├── proc-macro2 v1.0.86 (*)
    │       ├── quote v1.0.36 (*)
    │       └── syn v2.0.72 (*)
    ├── uniffi_bindgen v0.28.0
    │   ├── anyhow v1.0.86
    │   ├── askama v0.12.1
    │   │   ├── askama_derive v0.12.5 (proc-macro)
    │   │   │   ├── askama_parser v0.2.1
    │   │   │   │   └── nom v7.1.3 (*)
    │   │   │   ├── basic-toml v0.1.9
    │   │   │   │   └── serde v1.0.205
    │   │   │   │       └── serde_derive v1.0.205 (proc-macro) (*)
    │   │   │   ├── mime v0.3.17
    │   │   │   ├── mime_guess v2.0.5
    │   │   │   │   ├── mime v0.3.17
    │   │   │   │   └── unicase v2.7.0
    │   │   │   │       [build-dependencies]
    │   │   │   │       └── version_check v0.9.5
    │   │   │   │   [build-dependencies]
    │   │   │   │   └── unicase v2.7.0 (*)
    │   │   │   ├── proc-macro2 v1.0.86 (*)
    │   │   │   ├── quote v1.0.36 (*)
    │   │   │   ├── serde v1.0.205 (*)
    │   │   │   └── syn v2.0.72 (*)
    │   │   └── askama_escape v0.10.3
    │   ├── camino v1.1.7 (*)
    │   ├── cargo_metadata v0.15.4
    │   │   ├── camino v1.1.7 (*)
    │   │   ├── cargo-platform v0.1.8
    │   │   │   └── serde v1.0.205 (*)
    │   │   ├── semver v1.0.23
    │   │   │   └── serde v1.0.205 (*)
    │   │   ├── serde v1.0.205 (*)
    │   │   ├── serde_json v1.0.122
    │   │   │   ├── itoa v1.0.11
    │   │   │   ├── memchr v2.7.4
    │   │   │   ├── ryu v1.0.18
    │   │   │   └── serde v1.0.205 (*)
    │   │   └── thiserror v1.0.63 (*)
    │   ├── fs-err v2.11.0
    │   │   [build-dependencies]
    │   │   └── autocfg v1.3.0
    │   ├── glob v0.3.1
    │   ├── goblin v0.8.2
    │   │   ├── log v0.4.22
    │   │   ├── plain v0.2.3
    │   │   └── scroll v0.12.0
    │   │       └── scroll_derive v0.12.0 (proc-macro)
    │   │           ├── proc-macro2 v1.0.86 (*)
    │   │           ├── quote v1.0.36 (*)
    │   │           └── syn v2.0.72 (*)
    │   ├── heck v0.5.0
    │   ├── once_cell v1.19.0
    │   ├── paste v1.0.15 (proc-macro)
    │   ├── serde v1.0.205 (*)
    │   ├── textwrap v0.16.1
    │   │   └── smawk v0.3.2
    │   ├── toml v0.5.11
    │   │   └── serde v1.0.205 (*)
    │   ├── uniffi_meta v0.28.0
    │   │   ├── anyhow v1.0.86
    │   │   ├── bytes v1.7.1
    │   │   ├── siphasher v0.3.11
    │   │   └── uniffi_checksum_derive v0.28.0 (proc-macro)
    │   │       ├── quote v1.0.36 (*)
    │   │       └── syn v2.0.72 (*)
    │   ├── uniffi_testing v0.28.0
    │   │   ├── anyhow v1.0.86
    │   │   ├── camino v1.1.7 (*)
    │   │   ├── cargo_metadata v0.15.4 (*)
    │   │   ├── fs-err v2.11.0 (*)
    │   │   └── once_cell v1.19.0
    │   └── uniffi_udl v0.28.0
    │       ├── anyhow v1.0.86
    │       ├── textwrap v0.16.1 (*)
    │       ├── uniffi_meta v0.28.0 (*)
    │       ├── uniffi_testing v0.28.0 (*)
    │       └── weedle2 v5.0.0
    │           └── nom v7.1.3
    │               ├── memchr v2.7.4
    │               └── minimal-lexical v0.2.1
    ├── uniffi_core v0.28.0
    │   ├── anyhow v1.0.86
    │   ├── bytes v1.7.1
    │   ├── camino v1.1.7 (*)
    │   ├── log v0.4.22
    │   ├── once_cell v1.19.0
    │   ├── paste v1.0.15 (proc-macro)
    │   └── static_assertions v1.1.0
    └── uniffi_macros v0.28.0 (proc-macro)
        ├── bincode v1.3.3
        │   └── serde v1.0.205 (*)
        ├── camino v1.1.7
        │   └── serde v1.0.205 (*)
        ├── fs-err v2.11.0
        │   [build-dependencies]
        │   └── autocfg v1.3.0
        ├── once_cell v1.19.0
        ├── proc-macro2 v1.0.86 (*)
        ├── quote v1.0.36 (*)
        ├── serde v1.0.205 (*)
        ├── syn v2.0.72 (*)
        ├── toml v0.5.11
        │   └── serde v1.0.205 (*)
        └── uniffi_meta v0.28.0
            ├── anyhow v1.0.86
            ├── bytes v1.7.1
            ├── siphasher v0.3.11
            └── uniffi_checksum_derive v0.28.0 (proc-macro) (*)
[build-dependencies]
└── uniffi v0.28.0
    ├── anyhow v1.0.86
    ├── uniffi_build v0.28.0
    │   ├── anyhow v1.0.86
    │   ├── camino v1.1.7 (*)
    │   └── uniffi_bindgen v0.28.0
    │       ├── anyhow v1.0.86
    │       ├── askama v0.12.1
    │       │   ├── askama_derive v0.12.5 (proc-macro) (*)
    │       │   └── askama_escape v0.10.3
    │       ├── camino v1.1.7 (*)
    │       ├── cargo_metadata v0.15.4
    │       │   ├── camino v1.1.7 (*)
    │       │   ├── cargo-platform v0.1.8
    │       │   │   └── serde v1.0.205 (*)
    │       │   ├── semver v1.0.23
    │       │   │   └── serde v1.0.205 (*)
    │       │   ├── serde v1.0.205 (*)
    │       │   ├── serde_json v1.0.122
    │       │   │   ├── itoa v1.0.11
    │       │   │   ├── memchr v2.7.4
    │       │   │   ├── ryu v1.0.18
    │       │   │   └── serde v1.0.205 (*)
    │       │   └── thiserror v1.0.63
    │       │       └── thiserror-impl v1.0.63 (proc-macro) (*)
    │       ├── fs-err v2.11.0 (*)
    │       ├── glob v0.3.1
    │       ├── goblin v0.8.2
    │       │   ├── log v0.4.22
    │       │   ├── plain v0.2.3
    │       │   └── scroll v0.12.0
    │       │       └── scroll_derive v0.12.0 (proc-macro) (*)
    │       ├── heck v0.5.0
    │       ├── once_cell v1.19.0
    │       ├── paste v1.0.15 (proc-macro)
    │       ├── serde v1.0.205 (*)
    │       ├── textwrap v0.16.1
    │       │   └── smawk v0.3.2
    │       ├── toml v0.5.11 (*)
    │       ├── uniffi_meta v0.28.0 (*)
    │       ├── uniffi_testing v0.28.0
    │       │   ├── anyhow v1.0.86
    │       │   ├── camino v1.1.7 (*)
    │       │   ├── cargo_metadata v0.15.4 (*)
    │       │   ├── fs-err v2.11.0 (*)
    │       │   └── once_cell v1.19.0
    │       └── uniffi_udl v0.28.0
    │           ├── anyhow v1.0.86
    │           ├── textwrap v0.16.1 (*)
    │           ├── uniffi_meta v0.28.0 (*)
    │           ├── uniffi_testing v0.28.0 (*)
    │           └── weedle2 v5.0.0
    │               └── nom v7.1.3 (*)
    ├── uniffi_core v0.28.0
    │   ├── anyhow v1.0.86
    │   ├── bytes v1.7.1
    │   ├── camino v1.1.7 (*)
    │   ├── log v0.4.22
    │   ├── once_cell v1.19.0
    │   ├── paste v1.0.15 (proc-macro)
    │   └── static_assertions v1.1.0
    └── uniffi_macros v0.28.0 (proc-macro) (*)

I know that some of those crates can use the compiler-builtins, like the bitflags crate, but is an optional dependency, so I can say for shure if the compiler-builtins is or isn't in use. There is another way to check its usage? And what crate is using it? If I knew this I can compile the dependency if the right iOS target.

edit: forgot to put the output in a code block

@bjorn3
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bjorn3 commented Feb 21, 2025

Compiler-builtins is a part of the standard library which is shipped in precompiled form with rustc.

@joao-victor-silva
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I can be wrong but this way how compiler-builtins is shipped with rustc looks like a core part of the compiler, not being easy to change, right?

I'm thinking how I can circunvent this issue for now, maybe downgrade the compiler version to a older one that compile with the iOS target that I need or compile everything (compiler-builtins + rustc) by myself and compile the project with it. Any of these solutions would work?

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bjorn3 commented Feb 21, 2025

If you are using nightly, you can use IPHONEOS_DEPLOYMENT_TARGET=13.0 cargo build -Zbuild-std=std --target=aarch64-apple-ios to rebuild the standard library including compiler-builtins with the lower deployment target.

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C-bug Category: This is a bug. needs-triage This issue may need triage. Remove it if it has been sufficiently triaged. O-ios Operating system: iOS
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