diff --git a/compiler/rustc_codegen_ssa/src/back/link.rs b/compiler/rustc_codegen_ssa/src/back/link.rs index f7fe194d207d3..acf65259f61cf 100644 --- a/compiler/rustc_codegen_ssa/src/back/link.rs +++ b/compiler/rustc_codegen_ssa/src/back/link.rs @@ -667,7 +667,7 @@ fn link_natively<'a, B: ArchiveBuilder<'a>>( cmd.env_remove(k); } - if sess.opts.debugging_opts.print_link_args { + if sess.opts.prints.contains(&PrintRequest::LinkArgs) { println!("{:?}", &cmd); } diff --git a/compiler/rustc_driver/src/lib.rs b/compiler/rustc_driver/src/lib.rs index 694c679c1586e..19fa6812b45d9 100644 --- a/compiler/rustc_driver/src/lib.rs +++ b/compiler/rustc_driver/src/lib.rs @@ -645,9 +645,9 @@ impl RustcDefaultCalls { temps_dir: &Option, ) -> Compilation { use rustc_session::config::PrintRequest::*; - // PrintRequest::NativeStaticLibs is special - printed during linking + // NativeStaticLibs and LinkArgs are special - printed during linking // (empty iterator returns true) - if sess.opts.prints.iter().all(|&p| p == PrintRequest::NativeStaticLibs) { + if sess.opts.prints.iter().all(|&p| p == NativeStaticLibs || p == LinkArgs) { return Compilation::Continue; } @@ -738,7 +738,8 @@ impl RustcDefaultCalls { codegen_backend.print(*req, sess); } // Any output here interferes with Cargo's parsing of other printed output - PrintRequest::NativeStaticLibs => {} + NativeStaticLibs => {} + LinkArgs => {} } } Compilation::Stop diff --git a/compiler/rustc_interface/src/tests.rs b/compiler/rustc_interface/src/tests.rs index 0e27a82b2b13b..44acbd3cf2159 100644 --- a/compiler/rustc_interface/src/tests.rs +++ b/compiler/rustc_interface/src/tests.rs @@ -678,7 +678,6 @@ fn test_debugging_options_tracking_hash() { // `pre_link_arg` is omitted because it just forwards to `pre_link_args`. untracked!(pre_link_args, vec![String::from("abc"), String::from("def")]); untracked!(profile_closures, true); - untracked!(print_link_args, true); untracked!(print_llvm_passes, true); untracked!(print_mono_items, Some(String::from("abc"))); untracked!(print_type_sizes, true); diff --git a/compiler/rustc_session/src/config.rs b/compiler/rustc_session/src/config.rs index 62b351f5e0279..92ad0723f4879 100644 --- a/compiler/rustc_session/src/config.rs +++ b/compiler/rustc_session/src/config.rs @@ -565,6 +565,7 @@ pub enum PrintRequest { TargetSpec, NativeStaticLibs, StackProtectorStrategies, + LinkArgs, } #[derive(Copy, Clone)] @@ -1187,7 +1188,8 @@ pub fn rustc_short_optgroups() -> Vec { "Compiler information to print on stdout", "[crate-name|file-names|sysroot|target-libdir|cfg|target-list|\ target-cpus|target-features|relocation-models|code-models|\ - tls-models|target-spec-json|native-static-libs|stack-protector-strategies]", + tls-models|target-spec-json|native-static-libs|stack-protector-strategies\ + link-args]", ), opt::flagmulti_s("g", "", "Equivalent to -C debuginfo=2"), opt::flagmulti_s("O", "", "Equivalent to -C opt-level=2"), @@ -1619,6 +1621,7 @@ fn collect_print_requests( ); } } + "link-args" => PrintRequest::LinkArgs, req => early_error(error_format, &format!("unknown print request `{}`", req)), })); diff --git a/compiler/rustc_session/src/options.rs b/compiler/rustc_session/src/options.rs index c48d8d689c10e..e7ab8fffdf35c 100644 --- a/compiler/rustc_session/src/options.rs +++ b/compiler/rustc_session/src/options.rs @@ -1339,8 +1339,6 @@ options! { See #77382 and #74551."), print_fuel: Option = (None, parse_opt_string, [TRACKED], "make rustc print the total optimization fuel used by a crate"), - print_link_args: bool = (false, parse_bool, [UNTRACKED], - "print the arguments passed to the linker (default: no)"), print_llvm_passes: bool = (false, parse_bool, [UNTRACKED], "print the LLVM optimization passes being run (default: no)"), print_mono_items: Option = (None, parse_opt_string, [UNTRACKED], diff --git a/src/doc/rustc/src/command-line-arguments.md b/src/doc/rustc/src/command-line-arguments.md index 7f482f0f2b1a0..11925ab978588 100644 --- a/src/doc/rustc/src/command-line-arguments.md +++ b/src/doc/rustc/src/command-line-arguments.md @@ -170,6 +170,12 @@ The valid types of print values are: include a diagnostic note that indicates the linker flags to use when linking the resulting static library. The note starts with the text `native-static-libs:` to make it easier to fetch the output. +- `link-args` — This flag does not disable the `--emit` step. When linking, + this flag causes `rustc` to print the full linker invocation in a + human-readable form. This can be useful when debugging linker options. The + exact format of this debugging output is not a stable guarantee, other than + that it will include the linker executable and the text of each command-line + argument passed to the linker. [conditional compilation]: ../reference/conditional-compilation.html diff --git a/src/test/run-make-fulldeps/codegen-options-parsing/Makefile b/src/test/run-make-fulldeps/codegen-options-parsing/Makefile index 39e9a9bdd6b68..f1410b69b3fce 100644 --- a/src/test/run-make-fulldeps/codegen-options-parsing/Makefile +++ b/src/test/run-make-fulldeps/codegen-options-parsing/Makefile @@ -24,8 +24,8 @@ all: $(RUSTC) -C lto dummy.rs # Should not link dead code... - $(RUSTC) -Z print-link-args dummy.rs 2>&1 | \ + $(RUSTC) --print link-args dummy.rs 2>&1 | \ $(CGREP) -e '--gc-sections|-z[^ ]* [^ ]*|-dead_strip|/OPT:REF' # ... unless you specifically ask to keep it - $(RUSTC) -Z print-link-args -C link-dead-code dummy.rs 2>&1 | \ + $(RUSTC) --print link-args -C link-dead-code dummy.rs 2>&1 | \ $(CGREP) -ve '--gc-sections|-z[^ ]* [^ ]*|-dead_strip|/OPT:REF' diff --git a/src/test/run-make-fulldeps/interdependent-c-libraries/Makefile b/src/test/run-make-fulldeps/interdependent-c-libraries/Makefile index 1268022e37b74..0a50859cdaa4d 100644 --- a/src/test/run-make-fulldeps/interdependent-c-libraries/Makefile +++ b/src/test/run-make-fulldeps/interdependent-c-libraries/Makefile @@ -11,4 +11,4 @@ all: $(call NATIVE_STATICLIB,foo) $(call NATIVE_STATICLIB,bar) $(RUSTC) foo.rs $(RUSTC) bar.rs - $(RUSTC) main.rs -Z print-link-args + $(RUSTC) main.rs --print link-args diff --git a/src/test/run-make-fulldeps/link-arg/Makefile b/src/test/run-make-fulldeps/link-arg/Makefile index d7c9fd2711285..0360ede762551 100644 --- a/src/test/run-make-fulldeps/link-arg/Makefile +++ b/src/test/run-make-fulldeps/link-arg/Makefile @@ -1,5 +1,5 @@ -include ../tools.mk -RUSTC_FLAGS = -C link-arg="-lfoo" -C link-arg="-lbar" -Z print-link-args +RUSTC_FLAGS = -C link-arg="-lfoo" -C link-arg="-lbar" --print link-args all: $(RUSTC) $(RUSTC_FLAGS) empty.rs | $(CGREP) lfoo lbar diff --git a/src/test/run-make-fulldeps/metadata-flag-frobs-symbols/Makefile b/src/test/run-make-fulldeps/metadata-flag-frobs-symbols/Makefile index 09e6ae0bbf7cd..3ffbba9444bc2 100644 --- a/src/test/run-make-fulldeps/metadata-flag-frobs-symbols/Makefile +++ b/src/test/run-make-fulldeps/metadata-flag-frobs-symbols/Makefile @@ -6,5 +6,5 @@ all: $(RUSTC) bar.rs \ --extern foo1=$(TMPDIR)/libfoo-a.rlib \ --extern foo2=$(TMPDIR)/libfoo-b.rlib \ - -Z print-link-args + --print link-args $(call RUN,bar) diff --git a/src/test/run-make-fulldeps/no-builtins-lto/Makefile b/src/test/run-make-fulldeps/no-builtins-lto/Makefile index b9688f16c6464..2e41be39d5d00 100644 --- a/src/test/run-make-fulldeps/no-builtins-lto/Makefile +++ b/src/test/run-make-fulldeps/no-builtins-lto/Makefile @@ -6,4 +6,4 @@ all: # Build an executable that depends on that crate using LTO. The no_builtins crate doesn't # participate in LTO, so its rlib must be explicitly linked into the final binary. Verify this by # grepping the linker arguments. - $(RUSTC) main.rs -C lto -Z print-link-args | $(CGREP) 'libno_builtins.rlib' + $(RUSTC) main.rs -C lto --print link-args | $(CGREP) 'libno_builtins.rlib' diff --git a/src/test/run-make-fulldeps/redundant-libs/Makefile b/src/test/run-make-fulldeps/redundant-libs/Makefile index 8468d102bec83..e09841fb42e18 100644 --- a/src/test/run-make-fulldeps/redundant-libs/Makefile +++ b/src/test/run-make-fulldeps/redundant-libs/Makefile @@ -16,7 +16,7 @@ RUSTC_FLAGS = \ -l foo \ -l static=baz \ -l foo \ - -Z print-link-args + --print link-args all: $(call DYLIB,foo) $(call STATICLIB,bar) $(call STATICLIB,baz) $(RUSTC) $(RUSTC_FLAGS) main.rs diff --git a/src/test/run-make-fulldeps/static-nobundle/Makefile b/src/test/run-make-fulldeps/static-nobundle/Makefile index abc32d4423b05..8f78c401a1141 100644 --- a/src/test/run-make-fulldeps/static-nobundle/Makefile +++ b/src/test/run-make-fulldeps/static-nobundle/Makefile @@ -13,9 +13,9 @@ all: $(call NATIVE_STATICLIB,aaa) nm $(TMPDIR)/libbbb.rlib | $(CGREP) -e "U _*native_func" # Check that aaa gets linked (either as `-l aaa` or `aaa.lib`) when building ccc. - $(RUSTC) ccc.rs -C prefer-dynamic --crate-type=dylib -Z print-link-args | $(CGREP) -e '-l[" ]*aaa|aaa\.lib' + $(RUSTC) ccc.rs -C prefer-dynamic --crate-type=dylib --print link-args | $(CGREP) -e '-l[" ]*aaa|aaa\.lib' # Check that aaa does NOT get linked when building ddd. - $(RUSTC) ddd.rs -Z print-link-args | $(CGREP) -ve '-l[" ]*aaa|aaa\.lib' + $(RUSTC) ddd.rs --print link-args | $(CGREP) -ve '-l[" ]*aaa|aaa\.lib' $(call RUN,ddd)