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.
Signed-off-by: Matthew Maurer <mmaurer@xxxxxxxxxx>
---
rust/Makefile | 1 +
scripts/Makefile.host | 1 +
2 files changed, 2 insertions(+)
diff --git a/rust/Makefile b/rust/Makefile
index 87958e864be0..2a2352638f11 100644
--- a/rust/Makefile
+++ b/rust/Makefile
@@ -383,6 +383,7 @@ $(obj)/exports_kernel_generated.h: $(obj)/kernel.o FORCE
quiet_cmd_rustc_procmacro = $(RUSTC_OR_CLIPPY_QUIET) P $@
cmd_rustc_procmacro = \
$(RUSTC_OR_CLIPPY) $(rust_common_flags) \
+ -C linker-flavor=gcc -C linker=$(HOSTCC) \
--emit=dep-info=$(depfile) --emit=link=$@ --extern proc_macro \
--crate-type proc-macro \
--crate-name $(patsubst lib%.so,%,$(notdir $@)) $<
diff --git a/scripts/Makefile.host b/scripts/Makefile.host
index 8f7f842b54f9..0aa95a3af1c4 100644
--- a/scripts/Makefile.host
+++ b/scripts/Makefile.host
@@ -91,6 +91,7 @@ hostcxx_flags = -Wp,-MMD,$(depfile) \
# current working directory, which may be not accessible in the out-of-tree
# modules case.
hostrust_flags = --out-dir $(dir $@) --emit=dep-info=$(depfile) \
+ -C linker-flavor=gcc -C linker=$(HOSTCC) \
$(KBUILD_HOSTRUSTFLAGS) $(HOST_EXTRARUSTFLAGS) \
$(HOSTRUSTFLAGS_$(target-stem))
--
2.42.0.459.ge4e396fd5e-goog
