diff mbox series

[v2,1/3] rust: Introduce HAVE_GENERATE_RUST_TARGET config option

Message ID 20240905-mips-rust-v2-1-409d66819418@flygoat.com (mailing list archive)
State New
Headers show
Series rust: Initial MIPS support | expand

Commit Message

Jiaxun Yang Sept. 5, 2024, 1:33 p.m. UTC 
scripts/generate_rust_target.rs is used by several architectures
to generate target.json target spec file.

However the enablement of this feature was controlled by target
specific Makefile pieces spreading everywhere.

Introduce HAVE_GENERATE_RUST_TARGET config option as a centralized
switch to control the per-arch usage of generate_rust_target.rs.

Signed-off-by: Jiaxun Yang <jiaxun.yang@flygoat.com>
---
v2:
	- Reword Kconfig help
	- Remove x86 specific condition for UM
---
 Makefile             | 3 +++
 arch/Kconfig         | 8 ++++++++
 arch/um/Kconfig      | 1 +
 arch/x86/Makefile    | 1 -
 arch/x86/Makefile.um | 1 -
 rust/Makefile        | 2 +-
 scripts/Makefile     | 4 +---
 7 files changed, 14 insertions(+), 6 deletions(-)

Comments

Gary Guo Sept. 9, 2024, 3:28 p.m. UTC | #1 
On Thu, 05 Sep 2024 14:33:05 +0100
Jiaxun Yang <jiaxun.yang@flygoat.com> wrote:

> scripts/generate_rust_target.rs is used by several architectures
> to generate target.json target spec file.
> 
> However the enablement of this feature was controlled by target
> specific Makefile pieces spreading everywhere.
> 
> Introduce HAVE_GENERATE_RUST_TARGET config option as a centralized
> switch to control the per-arch usage of generate_rust_target.rs.
> 
> Signed-off-by: Jiaxun Yang <jiaxun.yang@flygoat.com>
> ---
> v2:
> 	- Reword Kconfig help
> 	- Remove x86 specific condition for UM
> ---
>  Makefile             | 3 +++
>  arch/Kconfig         | 8 ++++++++
>  arch/um/Kconfig      | 1 +
>  arch/x86/Makefile    | 1 -
>  arch/x86/Makefile.um | 1 -
>  rust/Makefile        | 2 +-
>  scripts/Makefile     | 4 +---
>  7 files changed, 14 insertions(+), 6 deletions(-)
> 
> diff --git a/Makefile b/Makefile
> index 2c1db7a6f793..b183855c34ea 100644
> --- a/Makefile
> +++ b/Makefile
> @@ -807,6 +807,9 @@ KBUILD_CFLAGS += -Os
>  KBUILD_RUSTFLAGS += -Copt-level=s
>  endif
>  
> +ifdef CONFIG_HAVE_GENERATE_RUST_TARGET
> +KBUILD_RUSTFLAGS += --target=$(objtree)/scripts/target.json
> +endif
>  # Always set `debug-assertions` and `overflow-checks` because their default
>  # depends on `opt-level` and `debug-assertions`, respectively.
>  KBUILD_RUSTFLAGS += -Cdebug-assertions=$(if $(CONFIG_RUST_DEBUG_ASSERTIONS),y,n)
> diff --git a/arch/Kconfig b/arch/Kconfig
> index 4e2eaba9e305..0865ff4796e7 100644
> --- a/arch/Kconfig
> +++ b/arch/Kconfig
> @@ -377,6 +377,14 @@ config HAVE_RUST
>  	  This symbol should be selected by an architecture if it
>  	  supports Rust.
>  
> +config HAVE_GENERATE_RUST_TARGET
> +	bool
> +	depends on HAVE_RUST
> +	help
> +	  This symbol should be selected by an architecture if it
> +	  needs generating Rust target.json file with
> +	  scripts/generate_rust_target.rs.
> +
>  config HAVE_FUNCTION_ARG_ACCESS_API
>  	bool
>  	help
> diff --git a/arch/um/Kconfig b/arch/um/Kconfig
> index dca84fd6d00a..6b1c8ae2422d 100644
> --- a/arch/um/Kconfig
> +++ b/arch/um/Kconfig
> @@ -32,6 +32,7 @@ config UML
>  	select TTY # Needed for line.c
>  	select HAVE_ARCH_VMAP_STACK
>  	select HAVE_RUST
> +	select HAVE_GENERATE_RUST_TARGET
>  	select ARCH_HAS_UBSAN
>  
>  config MMU
> diff --git a/arch/x86/Makefile b/arch/x86/Makefile
> index a1883a30a5d8..cbd707f88a63 100644
> --- a/arch/x86/Makefile
> +++ b/arch/x86/Makefile
> @@ -75,7 +75,6 @@ export BITS
>  #    https://gcc.gnu.org/bugzilla/show_bug.cgi?id=53383
>  #
>  KBUILD_CFLAGS += -mno-sse -mno-mmx -mno-sse2 -mno-3dnow -mno-avx
> -KBUILD_RUSTFLAGS += --target=$(objtree)/scripts/target.json
>  KBUILD_RUSTFLAGS += -Ctarget-feature=-sse,-sse2,-sse3,-ssse3,-sse4.1,-sse4.2,-avx,-avx2
>  
>  #
> diff --git a/arch/x86/Makefile.um b/arch/x86/Makefile.um
> index a46b1397ad01..2106a2bd152b 100644
> --- a/arch/x86/Makefile.um
> +++ b/arch/x86/Makefile.um
> @@ -9,7 +9,6 @@ core-y += arch/x86/crypto/
>  #
>  ifeq ($(CONFIG_CC_IS_CLANG),y)
>  KBUILD_CFLAGS += -mno-sse -mno-mmx -mno-sse2 -mno-3dnow -mno-avx
> -KBUILD_RUSTFLAGS += --target=$(objtree)/scripts/target.json
>  KBUILD_RUSTFLAGS += -Ctarget-feature=-sse,-sse2,-sse3,-ssse3,-sse4.1,-sse4.2,-avx,-avx2
>  endif
>  
> diff --git a/rust/Makefile b/rust/Makefile
> index 99204e33f1dd..fe3640b98011 100644
> --- a/rust/Makefile
> +++ b/rust/Makefile
> @@ -378,7 +378,7 @@ $(obj)/core.o: private rustc_objcopy = $(foreach sym,$(redirect-intrinsics),--re
>  $(obj)/core.o: private rustc_target_flags = $(core-cfgs)
>  $(obj)/core.o: $(RUST_LIB_SRC)/core/src/lib.rs FORCE
>  	+$(call if_changed_rule,rustc_library)
> -ifneq ($(or $(CONFIG_X86_64),$(CONFIG_X86_32)),)
> +ifdef CONFIG_HAVE_GENERATE_RUST_TARGET
>  $(obj)/core.o: scripts/target.json
>  endif
>  
> diff --git a/scripts/Makefile b/scripts/Makefile
> index dccef663ca82..33258a856a1a 100644
> --- a/scripts/Makefile
> +++ b/scripts/Makefile
> @@ -12,13 +12,11 @@ hostprogs-always-$(CONFIG_SYSTEM_EXTRA_CERTIFICATE)	+= insert-sys-cert
>  hostprogs-always-$(CONFIG_RUST_KERNEL_DOCTESTS)		+= rustdoc_test_builder
>  hostprogs-always-$(CONFIG_RUST_KERNEL_DOCTESTS)		+= rustdoc_test_gen
>  
> -ifneq ($(or $(CONFIG_X86_64),$(CONFIG_X86_32)),)
> -always-$(CONFIG_RUST)					+= target.json
> +always-$(CONFIG_HAVE_GENERATE_RUST_TARGET)		+= target.json
>  filechk_rust_target = $< < include/config/auto.conf
>  
>  $(obj)/target.json: scripts/generate_rust_target include/config/auto.conf FORCE
>  	$(call filechk,rust_target)
> -endif

Wouldn't this change cause target.json to be built when
CONFIG_HAVE_GENERATE_RUST_TARGET is selected by arch but CONFIG_RUST is
disabled?

Best,
Gary

>  
>  hostprogs += generate_rust_target
>  generate_rust_target-rust := y
>
diff mbox series

Patch

diff --git a/Makefile b/Makefile
index 2c1db7a6f793..b183855c34ea 100644
--- a/Makefile
+++ b/Makefile
@@ -807,6 +807,9 @@  KBUILD_CFLAGS += -Os
 KBUILD_RUSTFLAGS += -Copt-level=s
 endif
 
+ifdef CONFIG_HAVE_GENERATE_RUST_TARGET
+KBUILD_RUSTFLAGS += --target=$(objtree)/scripts/target.json
+endif
 # Always set `debug-assertions` and `overflow-checks` because their default
 # depends on `opt-level` and `debug-assertions`, respectively.
 KBUILD_RUSTFLAGS += -Cdebug-assertions=$(if $(CONFIG_RUST_DEBUG_ASSERTIONS),y,n)
diff --git a/arch/Kconfig b/arch/Kconfig
index 4e2eaba9e305..0865ff4796e7 100644
--- a/arch/Kconfig
+++ b/arch/Kconfig
@@ -377,6 +377,14 @@  config HAVE_RUST
 	  This symbol should be selected by an architecture if it
 	  supports Rust.
 
+config HAVE_GENERATE_RUST_TARGET
+	bool
+	depends on HAVE_RUST
+	help
+	  This symbol should be selected by an architecture if it
+	  needs generating Rust target.json file with
+	  scripts/generate_rust_target.rs.
+
 config HAVE_FUNCTION_ARG_ACCESS_API
 	bool
 	help
diff --git a/arch/um/Kconfig b/arch/um/Kconfig
index dca84fd6d00a..6b1c8ae2422d 100644
--- a/arch/um/Kconfig
+++ b/arch/um/Kconfig
@@ -32,6 +32,7 @@  config UML
 	select TTY # Needed for line.c
 	select HAVE_ARCH_VMAP_STACK
 	select HAVE_RUST
+	select HAVE_GENERATE_RUST_TARGET
 	select ARCH_HAS_UBSAN
 
 config MMU
diff --git a/arch/x86/Makefile b/arch/x86/Makefile
index a1883a30a5d8..cbd707f88a63 100644
--- a/arch/x86/Makefile
+++ b/arch/x86/Makefile
@@ -75,7 +75,6 @@  export BITS
 #    https://gcc.gnu.org/bugzilla/show_bug.cgi?id=53383
 #
 KBUILD_CFLAGS += -mno-sse -mno-mmx -mno-sse2 -mno-3dnow -mno-avx
-KBUILD_RUSTFLAGS += --target=$(objtree)/scripts/target.json
 KBUILD_RUSTFLAGS += -Ctarget-feature=-sse,-sse2,-sse3,-ssse3,-sse4.1,-sse4.2,-avx,-avx2
 
 #
diff --git a/arch/x86/Makefile.um b/arch/x86/Makefile.um
index a46b1397ad01..2106a2bd152b 100644
--- a/arch/x86/Makefile.um
+++ b/arch/x86/Makefile.um
@@ -9,7 +9,6 @@  core-y += arch/x86/crypto/
 #
 ifeq ($(CONFIG_CC_IS_CLANG),y)
 KBUILD_CFLAGS += -mno-sse -mno-mmx -mno-sse2 -mno-3dnow -mno-avx
-KBUILD_RUSTFLAGS += --target=$(objtree)/scripts/target.json
 KBUILD_RUSTFLAGS += -Ctarget-feature=-sse,-sse2,-sse3,-ssse3,-sse4.1,-sse4.2,-avx,-avx2
 endif
 
diff --git a/rust/Makefile b/rust/Makefile
index 99204e33f1dd..fe3640b98011 100644
--- a/rust/Makefile
+++ b/rust/Makefile
@@ -378,7 +378,7 @@  $(obj)/core.o: private rustc_objcopy = $(foreach sym,$(redirect-intrinsics),--re
 $(obj)/core.o: private rustc_target_flags = $(core-cfgs)
 $(obj)/core.o: $(RUST_LIB_SRC)/core/src/lib.rs FORCE
 	+$(call if_changed_rule,rustc_library)
-ifneq ($(or $(CONFIG_X86_64),$(CONFIG_X86_32)),)
+ifdef CONFIG_HAVE_GENERATE_RUST_TARGET
 $(obj)/core.o: scripts/target.json
 endif
 
diff --git a/scripts/Makefile b/scripts/Makefile
index dccef663ca82..33258a856a1a 100644
--- a/scripts/Makefile
+++ b/scripts/Makefile
@@ -12,13 +12,11 @@  hostprogs-always-$(CONFIG_SYSTEM_EXTRA_CERTIFICATE)	+= insert-sys-cert
 hostprogs-always-$(CONFIG_RUST_KERNEL_DOCTESTS)		+= rustdoc_test_builder
 hostprogs-always-$(CONFIG_RUST_KERNEL_DOCTESTS)		+= rustdoc_test_gen
 
-ifneq ($(or $(CONFIG_X86_64),$(CONFIG_X86_32)),)
-always-$(CONFIG_RUST)					+= target.json
+always-$(CONFIG_HAVE_GENERATE_RUST_TARGET)		+= target.json
 filechk_rust_target = $< < include/config/auto.conf
 
 $(obj)/target.json: scripts/generate_rust_target include/config/auto.conf FORCE
 	$(call filechk,rust_target)
-endif
 
 hostprogs += generate_rust_target
 generate_rust_target-rust := y