`rustdoc` can get confused when generating documentation into a folder that contains generated files from other `rustdoc` versions.
For instance, running something like:
rustup default 1.78.0 make LLVM=1 rustdoc rustup default 1.88.0 make LLVM=1 rustdoc
may generate errors like:
error: couldn't generate documentation: invalid template: last line expected to start with a comment | = note: failed to create or modify "./Documentation/output/rust/rustdoc/src-files.js"
Thus just always clean the output folder before generating the documentation -- we are anyway regenerating it every time the `rustdoc` target gets called, at least for the time being.
Cc: stable@vger.kernel.org # Needed in 6.12.y and later (Rust is pinned in older LTSs). Reported-by: Daniel Almeida daniel.almeida@collabora.com Closes: https://rust-for-linux.zulipchat.com/#narrow/channel/288089/topic/x/near/527... Reviewed-by: Tamir Duberstein tamird@kernel.org Link: https://lore.kernel.org/r/20250726133435.2460085-1-ojeda@kernel.org Signed-off-by: Miguel Ojeda ojeda@kernel.org (cherry picked from commit 252fea131e15aba2cd487119d1a8f546471199e2) --- rust/Makefile | 7 +++++-- 1 file changed, 5 insertions(+), 2 deletions(-)
diff --git a/rust/Makefile b/rust/Makefile index 17491d8229a4..84dc4cd46e7e 100644 --- a/rust/Makefile +++ b/rust/Makefile @@ -92,14 +92,14 @@ rustdoc: rustdoc-core rustdoc-macros rustdoc-compiler_builtins \ rustdoc-macros: private rustdoc_host = yes rustdoc-macros: private rustc_target_flags = --crate-type proc-macro \ --extern proc_macro -rustdoc-macros: $(src)/macros/lib.rs FORCE +rustdoc-macros: $(src)/macros/lib.rs rustdoc-clean FORCE +$(call if_changed,rustdoc)
# Starting with Rust 1.82.0, skipping `-Wrustdoc::unescaped_backticks` should # not be needed -- see https://github.com/rust-lang/rust/pull/128307. rustdoc-core: private skip_flags = --edition=2021 -Wrustdoc::unescaped_backticks rustdoc-core: private rustc_target_flags = --edition=$(core-edition) $(core-cfgs) -rustdoc-core: $(RUST_LIB_SRC)/core/src/lib.rs FORCE +rustdoc-core: $(RUST_LIB_SRC)/core/src/lib.rs rustdoc-clean FORCE +$(call if_changed,rustdoc)
rustdoc-compiler_builtins: $(src)/compiler_builtins.rs rustdoc-core FORCE @@ -116,6 +116,9 @@ rustdoc-kernel: $(src)/kernel/lib.rs rustdoc-core rustdoc-ffi rustdoc-macros \ $(obj)/bindings.o FORCE +$(call if_changed,rustdoc)
+rustdoc-clean: FORCE + $(Q)rm -rf $(rustdoc_output) + quiet_cmd_rustc_test_library = RUSTC TL $< cmd_rustc_test_library = \ OBJTREE=$(abspath $(objtree)) \