use `--dynamic-list` for exporting executable symbols #143446

usamoi · 2025-07-04T18:15:39Z

https://sourceware.org/binutils/docs-2.39/ld/VERSION.html:

--dynamic-list=dynamic-list-file
Specify the name of a dynamic list file to the linker. This is typically used when creating shared libraries to specify a list of global symbols whose references shouldn’t be bound to the definition within the shared library, or creating dynamically linked executables to specify a list of symbols which should be added to the symbol table in the executable. This option is only meaningful on ELF platforms which support shared libraries.

ld.lld --help:

--dynamic-list=: Similar to --export-dynamic-symbol-list. When creating a shared object, this additionally implies -Bsymbolic but does not set DF_SYMBOLIC

--export-dynamic-symbol-list=file: Read a list of dynamic symbol patterns. Apply --export-dynamic-symbol on each pattern

--export-dynamic-symbol=glob: (executable) Put matched symbols in the dynamic symbol table. (shared object) References to matched non-local STV_DEFAULT symbols shouldn't be bound to definitions within the shared object. Does not imply -Bsymbolic.

--export-dynamic: Put symbols in the dynamic symbol table

Use --dynamic-list because it's older than --export-dynamic-symbol-list (binutils 2.35)

try-job: dist-i586-gnu-i586-i686-musl

rustbot · 2025-07-04T18:15:43Z

r? @oli-obk

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rustbot · 2025-07-04T18:15:45Z

Some changes occurred in compiler/rustc_codegen_ssa

cc @WaffleLapkin

compiler/rustc_codegen_ssa/src/back/linker.rs

oli-obk · 2025-07-08T14:53:07Z

@bors r+ rollup

bors · 2025-07-08T14:53:11Z

📌 Commit abf1ccc has been approved by oli-obk

It is now in the queue for this repository.

compiler/rustc_codegen_ssa/src/back/linker.rs

oli-obk · 2025-07-08T14:57:04Z

@bors r-

usamoi · 2025-07-08T15:19:44Z

@rustbot ready

compiler/rustc_codegen_ssa/src/back/linker.rs

bjorn3 · 2025-07-09T08:46:42Z

@bors r=bjorn3,oli-obk

bors · 2025-07-09T08:46:45Z

📌 Commit 6fe2ad8 has been approved by bjorn3,oli-obk

It is now in the queue for this repository.

…r=bjorn3,oli-obk use `--dynamic-list` for exporting executable symbols closes rust-lang#101610 cc rust-lang#84161 https://sourceware.org/binutils/docs-2.39/ld/VERSION.html: > --dynamic-list=dynamic-list-file Specify the name of a dynamic list file to the linker. This is typically used when creating shared libraries to specify a list of global symbols whose references shouldn’t be bound to the definition within the shared library, or creating dynamically linked executables to specify a list of symbols which should be added to the symbol table in the executable. This option is only meaningful on ELF platforms which support shared libraries. `ld.lld --help`: > --dynamic-list=<file>: Similar to --export-dynamic-symbol-list. When creating a shared object, this additionally implies -Bsymbolic but does not set DF_SYMBOLIC > --export-dynamic-symbol-list=file: Read a list of dynamic symbol patterns. Apply --export-dynamic-symbol on each pattern > --export-dynamic-symbol=glob: (executable) Put matched symbols in the dynamic symbol table. (shared object) References to matched non-local STV_DEFAULT symbols shouldn't be bound to definitions within the shared object. Does not imply -Bsymbolic. > --export-dynamic: Put symbols in the dynamic symbol table Use `--dynamic-list` because it's older than `--export-dynamic-symbol-list` (binutils 2.35)

Rollup of 6 pull requests Successful merges: - #143398 (tidy: add support for `--extra-checks=auto:` feature) - #143446 (use `--dynamic-list` for exporting executable symbols) - #143644 (Add triagebot stdarch mention ping) - #143660 (Disable docs for `compiler-builtins` and `sysroot`) - #143666 (Re-expose nested bodies in rustc_borrowck::consumers) - #143668 (Fix VxWorks build errors) r? `@ghost` `@rustbot` modify labels: rollup

Kobzol · 2025-07-09T14:32:09Z

Probably failed in #143676 (comment).

@bors r-

bjorn3 · 2025-07-09T14:33:48Z

tests/ui/linking/export-executable-symbols.rs

+fn main() {
+    unsafe {
+        let handle = libc::dlopen(std::ptr::null(), libc::RTLD_NOW);
+        let ptr = libc::dlsym(handle, c"hack".as_ptr());


dlsym doesn't work for statically linked musl. This either needs -Ctarget-feature=-crt-static on musl or to exclude musl entirely.

usamoi · 2025-07-09T14:44:37Z

//@ only-gnu is added.

@rustbot ready

bjorn3 · 2025-07-10T13:24:13Z

@bors r=bjorn3,oli-obk

bors · 2025-07-10T13:24:16Z

📌 Commit bf6d29d has been approved by bjorn3,oli-obk

It is now in the queue for this repository.

Rollup of 9 pull requests Successful merges: - #143446 (use `--dynamic-list` for exporting executable symbols) - #143590 (Fix weird rustdoc output when single and glob reexport conflict on a name) - #143599 (emit `.att_syntax` when global/naked asm use that option) - #143615 (Fix handling of no_std targets in `doc::Std` step) - #143632 (fix: correct parameter names in LLVMRustBuildMinNum and LLVMRustBuildMaxNum FFI declarations) - #143640 (Constify `Fn*` traits) - #143651 (Win: Use exceptions with empty data for SEH panic exception copies instead of a new panic) - #143660 (Disable docs for `compiler-builtins` and `sysroot`) - #143665 ([rustdoc-json] Add tests for `#[doc(hidden)]` handling of items.) r? `@ghost` `@rustbot` modify labels: rollup

Rollup merge of #143446 - usamoi:export-executable-symbols, r=bjorn3,oli-obk use `--dynamic-list` for exporting executable symbols closes #101610 cc #84161 https://sourceware.org/binutils/docs-2.39/ld/VERSION.html: > --dynamic-list=dynamic-list-file Specify the name of a dynamic list file to the linker. This is typically used when creating shared libraries to specify a list of global symbols whose references shouldn’t be bound to the definition within the shared library, or creating dynamically linked executables to specify a list of symbols which should be added to the symbol table in the executable. This option is only meaningful on ELF platforms which support shared libraries. `ld.lld --help`: > --dynamic-list=<file>: Similar to --export-dynamic-symbol-list. When creating a shared object, this additionally implies -Bsymbolic but does not set DF_SYMBOLIC > --export-dynamic-symbol-list=file: Read a list of dynamic symbol patterns. Apply --export-dynamic-symbol on each pattern > --export-dynamic-symbol=glob: (executable) Put matched symbols in the dynamic symbol table. (shared object) References to matched non-local STV_DEFAULT symbols shouldn't be bound to definitions within the shared object. Does not imply -Bsymbolic. > --export-dynamic: Put symbols in the dynamic symbol table Use `--dynamic-list` because it's older than `--export-dynamic-symbol-list` (binutils 2.35) try-job: dist-i586-gnu-i586-i686-musl

Rollup of 9 pull requests Successful merges: - rust-lang/rust#143446 (use `--dynamic-list` for exporting executable symbols) - rust-lang/rust#143590 (Fix weird rustdoc output when single and glob reexport conflict on a name) - rust-lang/rust#143599 (emit `.att_syntax` when global/naked asm use that option) - rust-lang/rust#143615 (Fix handling of no_std targets in `doc::Std` step) - rust-lang/rust#143632 (fix: correct parameter names in LLVMRustBuildMinNum and LLVMRustBuildMaxNum FFI declarations) - rust-lang/rust#143640 (Constify `Fn*` traits) - rust-lang/rust#143651 (Win: Use exceptions with empty data for SEH panic exception copies instead of a new panic) - rust-lang/rust#143660 (Disable docs for `compiler-builtins` and `sysroot`) - rust-lang/rust#143665 ([rustdoc-json] Add tests for `#[doc(hidden)]` handling of items.) r? `@ghost` `@rustbot` modify labels: rollup

rustbot assigned oli-obk Jul 4, 2025

rustbot added S-waiting-on-review Status: Awaiting review from the assignee but also interested parties. T-compiler Relevant to the compiler team, which will review and decide on the PR/issue. labels Jul 4, 2025

bjorn3 reviewed Jul 4, 2025

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