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| author | Matthew Maurer <mmaurer@google.com> | 2023-10-05 23:39:58 +0200 |
|---|---|---|
| committer | Masahiro Yamada <masahiroy@kernel.org> | 2023-10-14 11:26:28 +0200 |
| commit | 80bac83a739d36d227aa5c54f6ed417f13c086dd (patch) | |
| tree | d7e473e4c988e02ccf6685e42207fb217c007f24 /rust | |
| parent | kbuild: rpm-pkg: generate kernel.spec in rpmbuild/SPECS/ (diff) | |
| download | linux-80bac83a739d36d227aa5c54f6ed417f13c086dd.tar.xz linux-80bac83a739d36d227aa5c54f6ed417f13c086dd.zip | |
rust: Respect HOSTCC when linking for host
Currently, rustc defaults to invoking `cc`, even if `HOSTCC` is defined,
resulting in build failures in hermetic environments where `cc` does not
exist. This includes both hostprogs and proc-macros.
Since we are setting the linker to `HOSTCC`, we set the linker flavor to
`gcc` explicitly. The linker-flavor selects both which linker to search
for if the linker is unset, and which kind of linker flags to pass.
Without this flag, `rustc` would attempt to determine which flags to
pass based on the name of the binary passed as `HOSTCC`. `gcc` is the
name of the linker-flavor used by `rustc` for all C compilers, including
both `gcc` and `clang`.
Signed-off-by: Matthew Maurer <mmaurer@google.com>
Reviewed-by: Martin Rodriguez Reboredo <yakoyoku@gmail.com>
Tested-by: Alice Ryhl <aliceryhl@google.com>
Reviewed-by: Nick Desaulniers <ndesaulniers@google.com>
Acked-by: Miguel Ojeda <ojeda@kernel.org>
Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
Diffstat (limited to 'rust')
| -rw-r--r-- | rust/Makefile | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/rust/Makefile b/rust/Makefile index 87958e864be0..2ddd821d9435 100644 --- a/rust/Makefile +++ b/rust/Makefile @@ -383,6 +383,8 @@ $(obj)/exports_kernel_generated.h: $(obj)/kernel.o FORCE quiet_cmd_rustc_procmacro = $(RUSTC_OR_CLIPPY_QUIET) P $@ cmd_rustc_procmacro = \ $(RUSTC_OR_CLIPPY) $(rust_common_flags) \ + -Clinker-flavor=gcc -Clinker=$(HOSTCC) \ + -Clink-args='$(call escsq,$(KBUILD_HOSTLDFLAGS))' \ --emit=dep-info=$(depfile) --emit=link=$@ --extern proc_macro \ --crate-type proc-macro \ --crate-name $(patsubst lib%.so,%,$(notdir $@)) $< |