Makefile | 3 ++- rust/Makefile | 8 +++++--- samples/rust/hostprogs/.gitignore | 1 + samples/rust/hostprogs/Makefile | 2 ++ scripts/.gitignore | 1 + scripts/Makefile | 3 +++ scripts/Makefile.host | 26 +++++++++++++++++++++++--- 7 files changed, 37 insertions(+), 7 deletions(-)
rustc's -C linker= option expects a single executable path. When
HOSTCC contains a wrapper (e.g. "ccache gcc"), passing
`-Clinker=$(HOSTCC)` results in the shell splitting the value into
multiple words, and rustc interprets the additional word as an
input filename:
error: multiple input filenames provided ...
Generate a small wrapper script and pass it to -Clinker e.g.
```
#!/bin/sh
exec ccache gcc "$@"
```
This fix should be general enough to address most if not all cases
(incl. wrappers or subcommands) and avoids surprises of simpler fixes
like just defaulting to gcc.
This avoids passing the user command as an environment variable as
that would be more challenging to trace and debug shell expansions.
Link: https://github.com/Rust-for-Linux/linux/issues/1224
Suggested-by: Yoann Congal <yoann.congal@smile.fr>
Signed-off-by: Mohamad Alsadhan <mo@sdhn.cc>
---
v6 -> v7:
- Always generate `scripts/rustc-wrapper` when `CONFIG_RUST=y`,
including cases with no Rust host programs in `scripts/`.
- Use `$(obj)/rustc-wrapper` for host Rust programs, fixing builds
outside `scripts/`, e.g. `samples/rust/hostprogs/`.
- remove leading exec (again) to allow leading env vars e.g.
HOSTRUSTC_LD="VAR=VAL ccache gcc".
- Track, clean and ignore generated wrapper as needed.
v5 -> v6:
- Add fix to `rust/Makefile` as well (Yoann)
- Include script to `.gitignore` and make clean (Nicolas)
- Add back the outer `exec` to the command
v4 -> v5:
- Fix word splitting issues
- Remove unnecessary `exec sh -c` and simplify generated script
v3 -> v4:
- Use filechk instead of if_changed macro to regenerate script
- Remove trailing space at EOL
v2 -> v3:
- Scrap previous hacky approaches (e.g. using lastword) and go with
a proper fix (Gary) which turned out not that complex to
implement.
v1 -> v2:
- Rename HOSTRUSTC_LINKER to HOSTRUSTC_LD for consistency
- Introduce explicit HOSTRUSTC_LD override
- Warn when falling back due to multi-argument HOSTCC
- Error out if a user-specified HOSTRUSTC_LD is not an executable
v1: https://lore.kernel.org/all/20260225102819.16553-1-mo@sdhn.cc/
v2: https://lore.kernel.org/all/20260227132713.23106-1-mo@sdhn.cc/
v3: https://lore.kernel.org/all/20260312002852.11292-1-mo@sdhn.cc/
v4: https://lore.kernel.org/all/20260317112021.14353-1-mo@sdhn.cc/
v5: https://lore.kernel.org/all/20260321150034.9915-1-mo@sdhn.cc/
v6: https://lore.kernel.org/all/20260331000802.380-1-mo@sdhn.cc/
---
Makefile | 3 ++-
rust/Makefile | 8 +++++---
samples/rust/hostprogs/.gitignore | 1 +
samples/rust/hostprogs/Makefile | 2 ++
scripts/.gitignore | 1 +
scripts/Makefile | 3 +++
scripts/Makefile.host | 26 +++++++++++++++++++++++---
7 files changed, 37 insertions(+), 7 deletions(-)
diff --git a/Makefile b/Makefile
index 1a219bf1c..5ebeef67f 100644
--- a/Makefile
+++ b/Makefile
@@ -1651,7 +1651,8 @@ CLEAN_FILES += vmlinux.symvers modules-only.symvers \
modules.builtin.ranges vmlinux.o.map vmlinux.unstripped \
compile_commands.json rust/test \
rust-project.json .vmlinux.objs .vmlinux.export.c \
- .builtin-dtbs-list .builtin-dtb.S
+ .builtin-dtbs-list .builtin-dtb.S \
+ scripts/rustc-wrapper
# Directories & files removed with 'make mrproper'
MRPROPER_FILES += include/config include/generated \
diff --git a/rust/Makefile b/rust/Makefile
index 5eca6a817..6bc761a31 100644
--- a/rust/Makefile
+++ b/rust/Makefile
@@ -565,7 +565,7 @@ $(obj)/libsyn.rlib: $(src)/syn/lib.rs $(obj)/libquote.rlib FORCE
quiet_cmd_rustc_procmacro = $(RUSTC_OR_CLIPPY_QUIET) P $@
cmd_rustc_procmacro = \
$(RUSTC_OR_CLIPPY) $(rust_common_flags) $(rustc_target_flags) \
- -Clinker-flavor=gcc -Clinker=$(HOSTCC) \
+ -Clinker-flavor=gcc -Clinker=scripts/rustc-wrapper \
-Clink-args='$(call escsq,$(KBUILD_PROCMACROLDFLAGS))' \
--emit=dep-info=$(depfile) --emit=link=$@ --extern proc_macro \
--crate-type proc-macro -L$(objtree)/$(obj) \
@@ -576,12 +576,14 @@ quiet_cmd_rustc_procmacro = $(RUSTC_OR_CLIPPY_QUIET) P $@
$(obj)/$(libmacros_name): private rustc_target_flags = \
--extern proc_macro2 --extern quote --extern syn
$(obj)/$(libmacros_name): $(src)/macros/lib.rs $(obj)/libproc_macro2.rlib \
- $(obj)/libquote.rlib $(obj)/libsyn.rlib FORCE
+ $(obj)/libquote.rlib $(obj)/libsyn.rlib \
+ scripts/rustc-wrapper FORCE
+$(call if_changed_dep,rustc_procmacro)
$(obj)/$(libpin_init_internal_name): private rustc_target_flags = $(pin_init_internal-flags)
$(obj)/$(libpin_init_internal_name): $(src)/pin-init/internal/src/lib.rs \
- $(obj)/libproc_macro2.rlib $(obj)/libquote.rlib $(obj)/libsyn.rlib FORCE
+ $(obj)/libproc_macro2.rlib $(obj)/libquote.rlib $(obj)/libsyn.rlib \
+ scripts/rustc-wrapper FORCE
+$(call if_changed_dep,rustc_procmacro)
# `rustc` requires `-Zunstable-options` to use custom target specifications
diff --git a/samples/rust/hostprogs/.gitignore b/samples/rust/hostprogs/.gitignore
index a6c173da5..d88a75790 100644
--- a/samples/rust/hostprogs/.gitignore
+++ b/samples/rust/hostprogs/.gitignore
@@ -1,3 +1,4 @@
# SPDX-License-Identifier: GPL-2.0
single
+rustc-wrapper
diff --git a/samples/rust/hostprogs/Makefile b/samples/rust/hostprogs/Makefile
index 8ddcbd741..9c9663a77 100644
--- a/samples/rust/hostprogs/Makefile
+++ b/samples/rust/hostprogs/Makefile
@@ -3,3 +3,5 @@
hostprogs-always-y := single
single-rust := y
+
+clean-files += rustc-wrapper
diff --git a/scripts/.gitignore b/scripts/.gitignore
index 4215c2208..b3948b148 100644
--- a/scripts/.gitignore
+++ b/scripts/.gitignore
@@ -6,6 +6,7 @@
/kallsyms
/module.lds
/recordmcount
+/rustc-wrapper
/rustdoc_test_builder
/rustdoc_test_gen
/sign-file
diff --git a/scripts/Makefile b/scripts/Makefile
index 0941e5ce7..287421322 100644
--- a/scripts/Makefile
+++ b/scripts/Makefile
@@ -29,6 +29,9 @@ generate_rust_target-rust := y
rustdoc_test_builder-rust := y
rustdoc_test_gen-rust := y
+always-$(CONFIG_RUST) += rustc-wrapper
+clean-files += rustc-wrapper
+
HOSTCFLAGS_tracepoint-update.o = -I$(srctree)/tools/include
HOSTCFLAGS_elf-parse.o = -I$(srctree)/tools/include
HOSTCFLAGS_sorttable.o = -I$(srctree)/tools/include
diff --git a/scripts/Makefile.host b/scripts/Makefile.host
index c1dedf646..84fd87a53 100644
--- a/scripts/Makefile.host
+++ b/scripts/Makefile.host
@@ -87,11 +87,30 @@ hostcxx_flags = -Wp,-MMD,$(depfile) \
$(KBUILD_HOSTCXXFLAGS) $(HOST_EXTRACXXFLAGS) \
$(HOSTCXXFLAGS_$(target-stem).o)
+# rustc's `-Clinker=` expects a single executable path, not a command line.
+# `HOSTCC` may be a multi-word command when wrapped (e.g. "ccache gcc"), which
+# would otherwise be split by the shell and mis-parsed by rustc.
+# To work around this, we generate a wrapper script that forwards arguments to
+# `HOSTRUSTC_LD` so that such commands can be used safely.
+#
+# Set `HOSTRUSTC_LD` for a different rustc linker command than `HOSTCC`
+HOSTRUSTC_LD ?= $(HOSTCC)
+
+define filechk_rustc-wrapper
+ printf "%s\n" \
+ '#!/bin/sh' \
+ '$(call escsq,$(HOSTRUSTC_LD)) "$$@"'
+endef
+
+$(obj)/rustc-wrapper: FORCE
+ $(call filechk,rustc-wrapper)
+ $(Q)chmod +x $@
+
# `--out-dir` is required to avoid temporaries being created by `rustc` in the
# current working directory, which may be not accessible in the out-of-tree
# modules case.
hostrust_flags = --out-dir $(dir $@) --emit=dep-info=$(depfile) \
- -Clinker-flavor=gcc -Clinker=$(HOSTCC) \
+ -Clinker-flavor=gcc -Clinker=$(obj)/rustc-wrapper \
-Clink-args='$(call escsq,$(KBUILD_HOSTLDFLAGS))' \
$(KBUILD_HOSTRUSTFLAGS) $(HOST_EXTRARUSTFLAGS) \
$(HOSTRUSTFLAGS_$(target-stem))
@@ -153,10 +172,11 @@ $(host-cxxobjs): $(obj)/%.o: $(obj)/%.cc FORCE
quiet_cmd_host-rust = HOSTRUSTC $@
cmd_host-rust = \
$(HOSTRUSTC) $(hostrust_flags) --emit=link=$@ $<
-$(host-rust): $(obj)/%: $(src)/%.rs FORCE
+$(host-rust): $(obj)/%: $(src)/%.rs $(obj)/rustc-wrapper FORCE
+$(call if_changed_dep,host-rust)
-targets += $(host-csingle) $(host-cmulti) $(host-cobjs) \
+targets += $(obj)/rustc-wrapper \
+ $(host-csingle) $(host-cmulti) $(host-cobjs) \
$(host-cxxmulti) $(host-cxxobjs) $(host-rust)
# %.lex.o <- %.lex.c <- %.l
--
2.53.0On Fri, 17 Apr 2026 00:15:23 +0300, Mohamad Alsadhan <mo@sdhn.cc> wrote: > diff --git a/rust/Makefile b/rust/Makefile > index 5eca6a817966..6bc761a31936 100644 > --- a/rust/Makefile > +++ b/rust/Makefile > @@ -565,7 +565,7 @@ $(obj)/libsyn.rlib: $(src)/syn/lib.rs $(obj)/libquote.rlib FORCE > quiet_cmd_rustc_procmacro = $(RUSTC_OR_CLIPPY_QUIET) P $@ > cmd_rustc_procmacro = \ > $(RUSTC_OR_CLIPPY) $(rust_common_flags) $(rustc_target_flags) \ > - -Clinker-flavor=gcc -Clinker=$(HOSTCC) \ > + -Clinker-flavor=gcc -Clinker=scripts/rustc-wrapper \ I think this should use an explicit $(objtree)/ prefix to make it an absolute path. > > diff --git a/scripts/Makefile.host b/scripts/Makefile.host > index c1dedf646a39..84fd87a5301d 100644 > --- a/scripts/Makefile.host > +++ b/scripts/Makefile.host > @@ -87,11 +87,30 @@ hostcxx_flags = -Wp,-MMD,$(depfile) \ > [ ... skip 22 lines ... ] > # `--out-dir` is required to avoid temporaries being created by `rustc` in the > # current working directory, which may be not accessible in the out-of-tree > # modules case. > hostrust_flags = --out-dir $(dir $@) --emit=dep-info=$(depfile) \ > - -Clinker-flavor=gcc -Clinker=$(HOSTCC) \ > + -Clinker-flavor=gcc -Clinker=$(obj)/rustc-wrapper \ I have not been following this series too closely but it feels weird that multiple rustc-wrapper files would be generated when their contents should be the exact same. Would other host programs have to copy the changes you made to .gitignore and Makefile under samples/rust/hostprogs? What was the issue with attempting to unify these? -- Cheers, Nathan
Thanks for your input, good points. On 26/04/29 06:01pm, Nathan Chancellor wrote: > > - -Clinker-flavor=gcc -Clinker=$(HOSTCC) \ > > + -Clinker-flavor=gcc -Clinker=scripts/rustc-wrapper \ > > I think this should use an explicit $(objtree)/ prefix to make it an > absolute path. > I changed the rustc-facing path to `$(objtree)/scripts/rustc-wrapper` in v8 for clarity. However, the make prerequisites stay as `scripts/rustc-wrapper`, because the rule is defined for that target name; using `$(objtree)/...` there breaks make dependency resolution. > I have not been following this series too closely but it feels weird > that multiple rustc-wrapper files would be generated when their contents > should be the exact same. Would other host programs have to copy the > changes you made to .gitignore and Makefile under samples/rust/hostprogs? > What was the issue with attempting to unify these? I agree; per-directory wrappers were the wrong end state. I have reworked v8 to use a single global wrapper under `scripts/` for both `rust/Makefile` and generic host Rust builds. The missing piece before was making sure that wrapper is always generated when Rust is enabled, even if no Rust hostprog in `scripts/` would otherwise build it. With that fixed, the local ignore/clean changes are dropped. v8 should follow soon. Apologies for this taking longer than needed, it was my first kbuild patch. The feedback and patience are very much appreciated. -- Best, mo
On Thu Apr 16, 2026 at 11:15 PM CEST, Mohamad Alsadhan wrote: > rustc's -C linker= option expects a single executable path. When > HOSTCC contains a wrapper (e.g. "ccache gcc"), passing > `-Clinker=$(HOSTCC)` results in the shell splitting the value into > multiple words, and rustc interprets the additional word as an > input filename: > > error: multiple input filenames provided ... > > Generate a small wrapper script and pass it to -Clinker e.g. > > ``` > #!/bin/sh > exec ccache gcc "$@" > ``` > > This fix should be general enough to address most if not all cases > (incl. wrappers or subcommands) and avoids surprises of simpler fixes > like just defaulting to gcc. > > This avoids passing the user command as an environment variable as > that would be more challenging to trace and debug shell expansions. > > Link: https://github.com/Rust-for-Linux/linux/issues/1224 > Suggested-by: Yoann Congal <yoann.congal@smile.fr> > Signed-off-by: Mohamad Alsadhan <mo@sdhn.cc> This does work on my ccache-enabled Yocto build, so: Tested-by: Yoann Congal <yoann.congal@smile.fr> Thanks! > --- > v6 -> v7: > - Always generate `scripts/rustc-wrapper` when `CONFIG_RUST=y`, > including cases with no Rust host programs in `scripts/`. > - Use `$(obj)/rustc-wrapper` for host Rust programs, fixing builds > outside `scripts/`, e.g. `samples/rust/hostprogs/`. > - remove leading exec (again) to allow leading env vars e.g. > HOSTRUSTC_LD="VAR=VAL ccache gcc". > - Track, clean and ignore generated wrapper as needed. > > v5 -> v6: > - Add fix to `rust/Makefile` as well (Yoann) > - Include script to `.gitignore` and make clean (Nicolas) > - Add back the outer `exec` to the command > > v4 -> v5: > - Fix word splitting issues > - Remove unnecessary `exec sh -c` and simplify generated script > > v3 -> v4: > - Use filechk instead of if_changed macro to regenerate script > - Remove trailing space at EOL > > v2 -> v3: > - Scrap previous hacky approaches (e.g. using lastword) and go with > a proper fix (Gary) which turned out not that complex to > implement. > > v1 -> v2: > - Rename HOSTRUSTC_LINKER to HOSTRUSTC_LD for consistency > - Introduce explicit HOSTRUSTC_LD override > - Warn when falling back due to multi-argument HOSTCC > - Error out if a user-specified HOSTRUSTC_LD is not an executable > > v1: https://lore.kernel.org/all/20260225102819.16553-1-mo@sdhn.cc/ > v2: https://lore.kernel.org/all/20260227132713.23106-1-mo@sdhn.cc/ > v3: https://lore.kernel.org/all/20260312002852.11292-1-mo@sdhn.cc/ > v4: https://lore.kernel.org/all/20260317112021.14353-1-mo@sdhn.cc/ > v5: https://lore.kernel.org/all/20260321150034.9915-1-mo@sdhn.cc/ > v6: https://lore.kernel.org/all/20260331000802.380-1-mo@sdhn.cc/ > --- > Makefile | 3 ++- > rust/Makefile | 8 +++++--- > samples/rust/hostprogs/.gitignore | 1 + > samples/rust/hostprogs/Makefile | 2 ++ > scripts/.gitignore | 1 + > scripts/Makefile | 3 +++ > scripts/Makefile.host | 26 +++++++++++++++++++++++--- > 7 files changed, 37 insertions(+), 7 deletions(-) > > diff --git a/Makefile b/Makefile > index 1a219bf1c..5ebeef67f 100644 > --- a/Makefile > +++ b/Makefile > @@ -1651,7 +1651,8 @@ CLEAN_FILES += vmlinux.symvers modules-only.symvers \ > modules.builtin.ranges vmlinux.o.map vmlinux.unstripped \ > compile_commands.json rust/test \ > rust-project.json .vmlinux.objs .vmlinux.export.c \ > - .builtin-dtbs-list .builtin-dtb.S > + .builtin-dtbs-list .builtin-dtb.S \ > + scripts/rustc-wrapper > > # Directories & files removed with 'make mrproper' > MRPROPER_FILES += include/config include/generated \ > diff --git a/rust/Makefile b/rust/Makefile > index 5eca6a817..6bc761a31 100644 > --- a/rust/Makefile > +++ b/rust/Makefile > @@ -565,7 +565,7 @@ $(obj)/libsyn.rlib: $(src)/syn/lib.rs $(obj)/libquote.rlib FORCE > quiet_cmd_rustc_procmacro = $(RUSTC_OR_CLIPPY_QUIET) P $@ > cmd_rustc_procmacro = \ > $(RUSTC_OR_CLIPPY) $(rust_common_flags) $(rustc_target_flags) \ > - -Clinker-flavor=gcc -Clinker=$(HOSTCC) \ > + -Clinker-flavor=gcc -Clinker=scripts/rustc-wrapper \ > -Clink-args='$(call escsq,$(KBUILD_PROCMACROLDFLAGS))' \ > --emit=dep-info=$(depfile) --emit=link=$@ --extern proc_macro \ > --crate-type proc-macro -L$(objtree)/$(obj) \ > @@ -576,12 +576,14 @@ quiet_cmd_rustc_procmacro = $(RUSTC_OR_CLIPPY_QUIET) P $@ > $(obj)/$(libmacros_name): private rustc_target_flags = \ > --extern proc_macro2 --extern quote --extern syn > $(obj)/$(libmacros_name): $(src)/macros/lib.rs $(obj)/libproc_macro2.rlib \ > - $(obj)/libquote.rlib $(obj)/libsyn.rlib FORCE > + $(obj)/libquote.rlib $(obj)/libsyn.rlib \ > + scripts/rustc-wrapper FORCE > +$(call if_changed_dep,rustc_procmacro) > > $(obj)/$(libpin_init_internal_name): private rustc_target_flags = $(pin_init_internal-flags) > $(obj)/$(libpin_init_internal_name): $(src)/pin-init/internal/src/lib.rs \ > - $(obj)/libproc_macro2.rlib $(obj)/libquote.rlib $(obj)/libsyn.rlib FORCE > + $(obj)/libproc_macro2.rlib $(obj)/libquote.rlib $(obj)/libsyn.rlib \ > + scripts/rustc-wrapper FORCE > +$(call if_changed_dep,rustc_procmacro) > > # `rustc` requires `-Zunstable-options` to use custom target specifications > diff --git a/samples/rust/hostprogs/.gitignore b/samples/rust/hostprogs/.gitignore > index a6c173da5..d88a75790 100644 > --- a/samples/rust/hostprogs/.gitignore > +++ b/samples/rust/hostprogs/.gitignore > @@ -1,3 +1,4 @@ > # SPDX-License-Identifier: GPL-2.0 > > single > +rustc-wrapper > diff --git a/samples/rust/hostprogs/Makefile b/samples/rust/hostprogs/Makefile > index 8ddcbd741..9c9663a77 100644 > --- a/samples/rust/hostprogs/Makefile > +++ b/samples/rust/hostprogs/Makefile > @@ -3,3 +3,5 @@ > hostprogs-always-y := single > > single-rust := y > + > +clean-files += rustc-wrapper > diff --git a/scripts/.gitignore b/scripts/.gitignore > index 4215c2208..b3948b148 100644 > --- a/scripts/.gitignore > +++ b/scripts/.gitignore > @@ -6,6 +6,7 @@ > /kallsyms > /module.lds > /recordmcount > +/rustc-wrapper > /rustdoc_test_builder > /rustdoc_test_gen > /sign-file > diff --git a/scripts/Makefile b/scripts/Makefile > index 0941e5ce7..287421322 100644 > --- a/scripts/Makefile > +++ b/scripts/Makefile > @@ -29,6 +29,9 @@ generate_rust_target-rust := y > rustdoc_test_builder-rust := y > rustdoc_test_gen-rust := y > > +always-$(CONFIG_RUST) += rustc-wrapper > +clean-files += rustc-wrapper > + > HOSTCFLAGS_tracepoint-update.o = -I$(srctree)/tools/include > HOSTCFLAGS_elf-parse.o = -I$(srctree)/tools/include > HOSTCFLAGS_sorttable.o = -I$(srctree)/tools/include > diff --git a/scripts/Makefile.host b/scripts/Makefile.host > index c1dedf646..84fd87a53 100644 > --- a/scripts/Makefile.host > +++ b/scripts/Makefile.host > @@ -87,11 +87,30 @@ hostcxx_flags = -Wp,-MMD,$(depfile) \ > $(KBUILD_HOSTCXXFLAGS) $(HOST_EXTRACXXFLAGS) \ > $(HOSTCXXFLAGS_$(target-stem).o) > > +# rustc's `-Clinker=` expects a single executable path, not a command line. > +# `HOSTCC` may be a multi-word command when wrapped (e.g. "ccache gcc"), which > +# would otherwise be split by the shell and mis-parsed by rustc. > +# To work around this, we generate a wrapper script that forwards arguments to > +# `HOSTRUSTC_LD` so that such commands can be used safely. > +# > +# Set `HOSTRUSTC_LD` for a different rustc linker command than `HOSTCC` > +HOSTRUSTC_LD ?= $(HOSTCC) > + > +define filechk_rustc-wrapper > + printf "%s\n" \ > + '#!/bin/sh' \ > + '$(call escsq,$(HOSTRUSTC_LD)) "$$@"' > +endef > + > +$(obj)/rustc-wrapper: FORCE > + $(call filechk,rustc-wrapper) > + $(Q)chmod +x $@ > + > # `--out-dir` is required to avoid temporaries being created by `rustc` in the > # current working directory, which may be not accessible in the out-of-tree > # modules case. > hostrust_flags = --out-dir $(dir $@) --emit=dep-info=$(depfile) \ > - -Clinker-flavor=gcc -Clinker=$(HOSTCC) \ > + -Clinker-flavor=gcc -Clinker=$(obj)/rustc-wrapper \ > -Clink-args='$(call escsq,$(KBUILD_HOSTLDFLAGS))' \ > $(KBUILD_HOSTRUSTFLAGS) $(HOST_EXTRARUSTFLAGS) \ > $(HOSTRUSTFLAGS_$(target-stem)) > @@ -153,10 +172,11 @@ $(host-cxxobjs): $(obj)/%.o: $(obj)/%.cc FORCE > quiet_cmd_host-rust = HOSTRUSTC $@ > cmd_host-rust = \ > $(HOSTRUSTC) $(hostrust_flags) --emit=link=$@ $< > -$(host-rust): $(obj)/%: $(src)/%.rs FORCE > +$(host-rust): $(obj)/%: $(src)/%.rs $(obj)/rustc-wrapper FORCE > +$(call if_changed_dep,host-rust) > > -targets += $(host-csingle) $(host-cmulti) $(host-cobjs) \ > +targets += $(obj)/rustc-wrapper \ > + $(host-csingle) $(host-cmulti) $(host-cobjs) \ > $(host-cxxmulti) $(host-cxxobjs) $(host-rust) > > # %.lex.o <- %.lex.c <- %.l -- Yoann Congal Smile ECS
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