mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-09-28 21:33:52 +00:00
8f5b5f7811
The most notable change is the drop of the 'alloc' in-tree fork. This is nicely reflected in the diffstat as a ~10k lines drop. In turn, this makes the version upgrades way simpler and smaller in the future, e.g. the latest one in commit56f64b3706
("rust: upgrade to Rust 1.78.0"). More importantly, this increases the chances that a newer compiler version just works, which in turn means supporting several compiler versions is easier now. Thus we will look into finally setting a minimum version in the near future. Toolchain and infrastructure: - Upgrade to Rust 1.78.0. This time around, due to how the kernel and Rust schedules have aligned, there are two upgrades in fact. These allow us to remove one more unstable feature ('offset_of') from the list, among other improvements. - Drop 'alloc' in-tree fork of the standard library crate, which means all the unstable features used by 'alloc' (~30 language ones, ~60 library ones) are not a concern anymore. - Support DWARFv5 via the '-Zdwarf-version' flag. - Support zlib and zstd debuginfo compression via the '-Zdebuginfo-compression' flag. 'kernel' crate: - Support allocation flags ('GFP_*'), particularly in 'Box' (via 'BoxExt'), 'Vec' (via 'VecExt'), 'Arc' and 'UniqueArc', as well as in the 'init' module APIs. - Remove usage of the 'allocator_api' unstable feature. - Remove 'try_' prefix in allocation APIs' names. - Add 'VecExt' (an extension trait) to be able to drop the 'alloc' fork. - Add the '{make,to}_{upper,lower}case()' methods to 'CStr'/'CString'. - Add the 'as_ptr' method to 'ThisModule'. - Add the 'from_raw' method to 'ArcBorrow'. - Add the 'into_unique_or_drop' method to 'Arc'. - Display column number in the 'dbg!' macro output by applying the equivalent change done to the standard library one. - Migrate 'Work' to '#[pin_data]' thanks to the changes in the 'macros' crate, which allows to remove an unsafe call in its 'new' associated function. - Prevent namespacing issues when using the '[try_][pin_]init!' macros by changing the generated name of guard variables. - Make the 'get' method in 'Opaque' const. - Implement the 'Default' trait for 'LockClassKey'. - Remove unneeded 'kernel::prelude' imports from doctests. - Remove redundant imports. 'macros' crate: - Add 'decl_generics' to 'parse_generics()' to support default values, and use that to allow them in '#[pin_data]'. Helpers: - Trivial English grammar fix. Documentation: - Add section on Rust Kselftests to the "Testing" document. - Expand the "Abstractions vs. bindings" section of the "General Information" document. -----BEGIN PGP SIGNATURE----- iQIzBAABCgAdFiEEPjU5OPd5QIZ9jqqOGXyLc2htIW0FAmZBIzoACgkQGXyLc2ht IW2/7hAAz5fRsx1M1b/JU3P3lc3XKUaFCmAWJX6F+sNHp8vNeFYNzVZ3ylk6Z4zB idkTq0Y5Rlc8ejryHiEMaY3X7Zrh0yt3G/AzKZqZx54IAPUp59BRSvG3+SJanQ7p Gjy+cCXweLtYjF79Au5Ejt52gV+JAwPtGLkbl1skNs0jPr4rqm+Zg4bPhE5Sr0Eh mh2VxcHf3rbIVhBYJTYGNpsnQYZNwfPDJ+bRudYp1BymLYOG8A328ocvU19BM63+ 6FFQBLgB3N8OS+Mw0c8AeFVNkeCw4NesmIkBMco8wm8QXyLz1zjg948LT9ogPCgB 5eC41yAxa83uPdt8L034YNfJa+IgFleZp339QKW2+vXHks43M8IMLq9WP7GU84M1 Axu5ekl5sR6awOk0265Zc1ghkOTQREIi0kiqtNBh9wc/qILAD2DyYoy1td9ch1Qi BBNxyKYaMx9z+7mhK4ksTbRb+VrdDmFPDhXOIJD5zg4yrLZOM6Mb/O+BnSD2pxa3 6cUGwfQTv0hbBTeY4ZgdNgFu2YJ/9rqACKtULoaT0AID/d8I3fxc7J35AWnqeC/x nALHTa2JMkBvN03Afn0wCVuXbdLW0/9DCGnuuhYMn0DhFC/uuKicsvwfjcGSKnPN iaRJoRCYKjlc0AJSYHhavgyp2R9HnVM0E53PC3ubjiKz5DsaRDU= =j6/D -----END PGP SIGNATURE----- Merge tag 'rust-6.10' of https://github.com/Rust-for-Linux/linux Pull Rust updates from Miguel Ojeda: "The most notable change is the drop of the 'alloc' in-tree fork. This is nicely reflected in the diffstat as a ~10k lines drop. In turn, this makes the version upgrades way simpler and smaller in the future, e.g. the latest one in commit56f64b3706
("rust: upgrade to Rust 1.78.0"). More importantly, this increases the chances that a newer compiler version just works, which in turn means supporting several compiler versions is easier now. Thus we will look into finally setting a minimum version in the near future. Toolchain and infrastructure: - Upgrade to Rust 1.78.0 This time around, due to how the kernel and Rust schedules have aligned, there are two upgrades in fact. These allow us to remove one more unstable feature ('offset_of') from the list, among other improvements - Drop 'alloc' in-tree fork of the standard library crate, which means all the unstable features used by 'alloc' (~30 language ones, ~60 library ones) are not a concern anymore - Support DWARFv5 via the '-Zdwarf-version' flag - Support zlib and zstd debuginfo compression via the '-Zdebuginfo-compression' flag 'kernel' crate: - Support allocation flags ('GFP_*'), particularly in 'Box' (via 'BoxExt'), 'Vec' (via 'VecExt'), 'Arc' and 'UniqueArc', as well as in the 'init' module APIs - Remove usage of the 'allocator_api' unstable feature - Remove 'try_' prefix in allocation APIs' names - Add 'VecExt' (an extension trait) to be able to drop the 'alloc' fork - Add the '{make,to}_{upper,lower}case()' methods to 'CStr'/'CString' - Add the 'as_ptr' method to 'ThisModule' - Add the 'from_raw' method to 'ArcBorrow' - Add the 'into_unique_or_drop' method to 'Arc' - Display column number in the 'dbg!' macro output by applying the equivalent change done to the standard library one - Migrate 'Work' to '#[pin_data]' thanks to the changes in the 'macros' crate, which allows to remove an unsafe call in its 'new' associated function - Prevent namespacing issues when using the '[try_][pin_]init!' macros by changing the generated name of guard variables - Make the 'get' method in 'Opaque' const - Implement the 'Default' trait for 'LockClassKey' - Remove unneeded 'kernel::prelude' imports from doctests - Remove redundant imports 'macros' crate: - Add 'decl_generics' to 'parse_generics()' to support default values, and use that to allow them in '#[pin_data]' Helpers: - Trivial English grammar fix Documentation: - Add section on Rust Kselftests to the 'Testing' document - Expand the 'Abstractions vs. bindings' section of the 'General Information' document" * tag 'rust-6.10' of https://github.com/Rust-for-Linux/linux: (31 commits) rust: alloc: fix dangling pointer in VecExt<T>::reserve() rust: upgrade to Rust 1.78.0 rust: kernel: remove redundant imports rust: sync: implement `Default` for `LockClassKey` docs: rust: extend abstraction and binding documentation docs: rust: Add instructions for the Rust kselftest rust: remove unneeded `kernel::prelude` imports from doctests rust: update `dbg!()` to format column number rust: helpers: Fix grammar in comment rust: init: change the generated name of guard variables rust: sync: add `Arc::into_unique_or_drop` rust: sync: add `ArcBorrow::from_raw` rust: types: Make Opaque::get const rust: kernel: remove usage of `allocator_api` unstable feature rust: init: update `init` module to take allocation flags rust: sync: update `Arc` and `UniqueArc` to take allocation flags rust: alloc: update `VecExt` to take allocation flags rust: alloc: introduce the `BoxExt` trait rust: alloc: introduce allocation flags rust: alloc: remove our fork of the `alloc` crate ...
518 lines
17 KiB
Makefile
518 lines
17 KiB
Makefile
# SPDX-License-Identifier: GPL-2.0
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# ==========================================================================
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# Building
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# ==========================================================================
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src := $(obj)
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PHONY := $(obj)/
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$(obj)/:
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# Init all relevant variables used in kbuild files so
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# 1) they have correct type
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# 2) they do not inherit any value from the environment
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obj-y :=
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obj-m :=
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lib-y :=
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lib-m :=
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always-y :=
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always-m :=
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targets :=
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subdir-y :=
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subdir-m :=
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EXTRA_AFLAGS :=
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EXTRA_CFLAGS :=
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EXTRA_CPPFLAGS :=
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EXTRA_LDFLAGS :=
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asflags-y :=
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ccflags-y :=
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rustflags-y :=
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cppflags-y :=
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ldflags-y :=
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subdir-asflags-y :=
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subdir-ccflags-y :=
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# Read auto.conf if it exists, otherwise ignore
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-include include/config/auto.conf
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include $(srctree)/scripts/Kbuild.include
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include $(srctree)/scripts/Makefile.compiler
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include $(kbuild-file)
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include $(srctree)/scripts/Makefile.lib
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# Do not include hostprogs rules unless needed.
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# $(sort ...) is used here to remove duplicated words and excessive spaces.
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hostprogs := $(sort $(hostprogs))
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ifneq ($(hostprogs),)
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include $(srctree)/scripts/Makefile.host
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endif
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# Do not include userprogs rules unless needed.
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# $(sort ...) is used here to remove duplicated words and excessive spaces.
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userprogs := $(sort $(userprogs))
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ifneq ($(userprogs),)
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include $(srctree)/scripts/Makefile.userprogs
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endif
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ifndef obj
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$(warning kbuild: Makefile.build is included improperly)
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endif
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ifeq ($(need-modorder),)
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ifneq ($(obj-m),)
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$(warning $(patsubst %.o,'%.ko',$(obj-m)) will not be built even though obj-m is specified.)
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$(warning You cannot use subdir-y/m to visit a module Makefile. Use obj-y/m instead.)
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endif
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endif
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# ===========================================================================
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# subdir-builtin and subdir-modorder may contain duplications. Use $(sort ...)
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subdir-builtin := $(sort $(filter %/built-in.a, $(real-obj-y)))
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subdir-modorder := $(sort $(filter %/modules.order, $(obj-m)))
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subdir-dtbslist := $(sort $(filter %/dtbs-list, $(dtb-y)))
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targets-for-builtin := $(extra-y)
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ifneq ($(strip $(lib-y) $(lib-m) $(lib-)),)
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targets-for-builtin += $(obj)/lib.a
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endif
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ifdef need-builtin
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targets-for-builtin += $(obj)/built-in.a
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endif
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targets-for-modules := $(foreach x, o mod, \
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$(patsubst %.o, %.$x, $(filter %.o, $(obj-m))))
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ifdef need-modorder
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targets-for-modules += $(obj)/modules.order
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endif
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targets += $(targets-for-builtin) $(targets-for-modules)
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# Linus' kernel sanity checking tool
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ifeq ($(KBUILD_CHECKSRC),1)
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quiet_cmd_checksrc = CHECK $<
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cmd_checksrc = $(CHECK) $(CHECKFLAGS) $(c_flags) $<
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else ifeq ($(KBUILD_CHECKSRC),2)
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quiet_cmd_force_checksrc = CHECK $<
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cmd_force_checksrc = $(CHECK) $(CHECKFLAGS) $(c_flags) $<
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endif
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ifneq ($(KBUILD_EXTRA_WARN),)
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cmd_checkdoc = $(srctree)/scripts/kernel-doc -none $(KDOCFLAGS) \
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$(if $(findstring 2, $(KBUILD_EXTRA_WARN)), -Wall) \
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$<
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endif
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# Compile C sources (.c)
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# ---------------------------------------------------------------------------
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quiet_cmd_cc_s_c = CC $(quiet_modtag) $@
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cmd_cc_s_c = $(CC) $(filter-out $(DEBUG_CFLAGS) $(CC_FLAGS_LTO), $(c_flags)) -fverbose-asm -S -o $@ $<
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$(obj)/%.s: $(src)/%.c FORCE
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$(call if_changed_dep,cc_s_c)
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quiet_cmd_cpp_i_c = CPP $(quiet_modtag) $@
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cmd_cpp_i_c = $(CPP) $(c_flags) -o $@ $<
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$(obj)/%.i: $(src)/%.c FORCE
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$(call if_changed_dep,cpp_i_c)
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genksyms = scripts/genksyms/genksyms \
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$(if $(1), -T $(2)) \
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$(if $(KBUILD_PRESERVE), -p) \
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-r $(or $(wildcard $(2:.symtypes=.symref)), /dev/null)
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# These mirror gensymtypes_S and co below, keep them in synch.
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cmd_gensymtypes_c = $(CPP) -D__GENKSYMS__ $(c_flags) $< | $(genksyms)
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quiet_cmd_cc_symtypes_c = SYM $(quiet_modtag) $@
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cmd_cc_symtypes_c = $(call cmd_gensymtypes_c,true,$@) >/dev/null
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$(obj)/%.symtypes : $(src)/%.c FORCE
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$(call cmd,cc_symtypes_c)
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# LLVM assembly
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# Generate .ll files from .c
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quiet_cmd_cc_ll_c = CC $(quiet_modtag) $@
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cmd_cc_ll_c = $(CC) $(c_flags) -emit-llvm -S -fno-discard-value-names -o $@ $<
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$(obj)/%.ll: $(src)/%.c FORCE
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$(call if_changed_dep,cc_ll_c)
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# C (.c) files
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# The C file is compiled and updated dependency information is generated.
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# (See cmd_cc_o_c + relevant part of rule_cc_o_c)
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is-single-obj-m = $(and $(part-of-module),$(filter $@, $(obj-m)),y)
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# When a module consists of a single object, there is no reason to keep LLVM IR.
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# Make $(LD) covert LLVM IR to ELF here.
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ifdef CONFIG_LTO_CLANG
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cmd_ld_single_m = $(if $(is-single-obj-m), ; $(LD) $(ld_flags) -r -o $(tmp-target) $@; mv $(tmp-target) $@)
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endif
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quiet_cmd_cc_o_c = CC $(quiet_modtag) $@
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cmd_cc_o_c = $(CC) $(c_flags) -c -o $@ $< \
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$(cmd_ld_single_m) \
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$(cmd_objtool)
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ifdef CONFIG_MODVERSIONS
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# When module versioning is enabled the following steps are executed:
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# o compile a <file>.o from <file>.c
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# o if <file>.o doesn't contain a __export_symbol_*, i.e. does
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# not export symbols, it's done.
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# o otherwise, we calculate symbol versions using the good old
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# genksyms on the preprocessed source and dump them into the .cmd file.
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# o modpost will extract versions from that file and create *.c files that will
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# be compiled and linked to the kernel and/or modules.
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gen_symversions = \
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if $(NM) $@ 2>/dev/null | grep -q ' __export_symbol_'; then \
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$(call cmd_gensymtypes_$(1),$(KBUILD_SYMTYPES),$(@:.o=.symtypes)) \
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>> $(dot-target).cmd; \
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fi
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cmd_gen_symversions_c = $(call gen_symversions,c)
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endif
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ifdef CONFIG_FTRACE_MCOUNT_USE_RECORDMCOUNT
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# compiler will not generate __mcount_loc use recordmcount or recordmcount.pl
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ifdef BUILD_C_RECORDMCOUNT
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ifeq ("$(origin RECORDMCOUNT_WARN)", "command line")
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RECORDMCOUNT_FLAGS = -w
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endif
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# Due to recursion, we must skip empty.o.
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# The empty.o file is created in the make process in order to determine
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# the target endianness and word size. It is made before all other C
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# files, including recordmcount.
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sub_cmd_record_mcount = \
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if [ $(@) != "scripts/mod/empty.o" ]; then \
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$(objtree)/scripts/recordmcount $(RECORDMCOUNT_FLAGS) "$(@)"; \
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fi;
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recordmcount_source := $(srctree)/scripts/recordmcount.c \
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$(srctree)/scripts/recordmcount.h
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else
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sub_cmd_record_mcount = perl $(srctree)/scripts/recordmcount.pl "$(ARCH)" \
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"$(if $(CONFIG_CPU_BIG_ENDIAN),big,little)" \
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"$(if $(CONFIG_64BIT),64,32)" \
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"$(OBJDUMP)" "$(OBJCOPY)" "$(CC) $(KBUILD_CPPFLAGS) $(KBUILD_CFLAGS)" \
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"$(LD) $(KBUILD_LDFLAGS)" "$(NM)" "$(RM)" "$(MV)" \
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"$(if $(part-of-module),1,0)" "$(@)";
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recordmcount_source := $(srctree)/scripts/recordmcount.pl
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endif # BUILD_C_RECORDMCOUNT
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cmd_record_mcount = $(if $(findstring $(strip $(CC_FLAGS_FTRACE)),$(_c_flags)), \
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$(sub_cmd_record_mcount))
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endif # CONFIG_FTRACE_MCOUNT_USE_RECORDMCOUNT
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# 'OBJECT_FILES_NON_STANDARD := y': skip objtool checking for a directory
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# 'OBJECT_FILES_NON_STANDARD_foo.o := 'y': skip objtool checking for a file
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# 'OBJECT_FILES_NON_STANDARD_foo.o := 'n': override directory skip for a file
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is-standard-object = $(if $(filter-out y%, $(OBJECT_FILES_NON_STANDARD_$(target-stem).o)$(OBJECT_FILES_NON_STANDARD)n),y)
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$(obj)/%.o: objtool-enabled = $(if $(is-standard-object),$(if $(delay-objtool),$(is-single-obj-m),y))
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ifneq ($(findstring 1, $(KBUILD_EXTRA_WARN)),)
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cmd_warn_shared_object = $(if $(word 2, $(modname-multi)),$(warning $(kbuild-file): $*.o is added to multiple modules: $(modname-multi)))
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endif
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define rule_cc_o_c
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$(call cmd_and_fixdep,cc_o_c)
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$(call cmd,checksrc)
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$(call cmd,checkdoc)
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$(call cmd,gen_objtooldep)
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$(call cmd,gen_symversions_c)
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$(call cmd,record_mcount)
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$(call cmd,warn_shared_object)
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endef
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define rule_as_o_S
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$(call cmd_and_fixdep,as_o_S)
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$(call cmd,gen_objtooldep)
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$(call cmd,gen_symversions_S)
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$(call cmd,warn_shared_object)
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endef
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# Built-in and composite module parts
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$(obj)/%.o: $(src)/%.c $(recordmcount_source) FORCE
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$(call if_changed_rule,cc_o_c)
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$(call cmd,force_checksrc)
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# To make this rule robust against "Argument list too long" error,
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# ensure to add $(obj)/ prefix by a shell command.
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cmd_mod = printf '%s\n' $(call real-search, $*.o, .o, -objs -y -m) | \
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$(AWK) '!x[$$0]++ { print("$(obj)/"$$0) }' > $@
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$(obj)/%.mod: FORCE
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$(call if_changed,mod)
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quiet_cmd_cc_lst_c = MKLST $@
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cmd_cc_lst_c = $(CC) $(c_flags) -g -c -o $*.o $< && \
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$(CONFIG_SHELL) $(srctree)/scripts/makelst $*.o \
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System.map $(OBJDUMP) > $@
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$(obj)/%.lst: $(src)/%.c FORCE
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$(call if_changed_dep,cc_lst_c)
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# Compile Rust sources (.rs)
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# ---------------------------------------------------------------------------
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rust_allowed_features := new_uninit
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# `--out-dir` is required to avoid temporaries being created by `rustc` in the
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# current working directory, which may be not accessible in the out-of-tree
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# modules case.
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rust_common_cmd = \
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RUST_MODFILE=$(modfile) $(RUSTC_OR_CLIPPY) $(rust_flags) \
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-Zallow-features=$(rust_allowed_features) \
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-Zcrate-attr=no_std \
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-Zcrate-attr='feature($(rust_allowed_features))' \
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-Zunstable-options --extern force:alloc --extern kernel \
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--crate-type rlib -L $(objtree)/rust/ \
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--crate-name $(basename $(notdir $@)) \
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--sysroot=/dev/null \
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--out-dir $(dir $@) --emit=dep-info=$(depfile)
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# `--emit=obj`, `--emit=asm` and `--emit=llvm-ir` imply a single codegen unit
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# will be used. We explicitly request `-Ccodegen-units=1` in any case, and
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# the compiler shows a warning if it is not 1. However, if we ever stop
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# requesting it explicitly and we start using some other `--emit` that does not
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# imply it (and for which codegen is performed), then we would be out of sync,
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# i.e. the outputs we would get for the different single targets (e.g. `.ll`)
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# would not match each other.
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quiet_cmd_rustc_o_rs = $(RUSTC_OR_CLIPPY_QUIET) $(quiet_modtag) $@
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cmd_rustc_o_rs = $(rust_common_cmd) --emit=obj=$@ $<
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$(obj)/%.o: $(src)/%.rs FORCE
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+$(call if_changed_dep,rustc_o_rs)
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quiet_cmd_rustc_rsi_rs = $(RUSTC_OR_CLIPPY_QUIET) $(quiet_modtag) $@
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cmd_rustc_rsi_rs = \
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$(rust_common_cmd) -Zunpretty=expanded $< >$@; \
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command -v $(RUSTFMT) >/dev/null && $(RUSTFMT) $@
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$(obj)/%.rsi: $(src)/%.rs FORCE
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+$(call if_changed_dep,rustc_rsi_rs)
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quiet_cmd_rustc_s_rs = $(RUSTC_OR_CLIPPY_QUIET) $(quiet_modtag) $@
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cmd_rustc_s_rs = $(rust_common_cmd) --emit=asm=$@ $<
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$(obj)/%.s: $(src)/%.rs FORCE
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+$(call if_changed_dep,rustc_s_rs)
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quiet_cmd_rustc_ll_rs = $(RUSTC_OR_CLIPPY_QUIET) $(quiet_modtag) $@
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cmd_rustc_ll_rs = $(rust_common_cmd) --emit=llvm-ir=$@ $<
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$(obj)/%.ll: $(src)/%.rs FORCE
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+$(call if_changed_dep,rustc_ll_rs)
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# Compile assembler sources (.S)
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# ---------------------------------------------------------------------------
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# .S file exports must have their C prototypes defined in asm/asm-prototypes.h
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|
# or a file that it includes, in order to get versioned symbols. We build a
|
|
# dummy C file that includes asm-prototypes and the EXPORT_SYMBOL lines from
|
|
# the .S file (with trailing ';'), and run genksyms on that, to extract vers.
|
|
#
|
|
# This is convoluted. The .S file must first be preprocessed to run guards and
|
|
# expand names, then the resulting exports must be constructed into plain
|
|
# EXPORT_SYMBOL(symbol); to build our dummy C file, and that gets preprocessed
|
|
# to make the genksyms input.
|
|
#
|
|
# These mirror gensymtypes_c and co above, keep them in synch.
|
|
cmd_gensymtypes_S = \
|
|
{ echo "\#include <linux/kernel.h>" ; \
|
|
echo "\#include <asm/asm-prototypes.h>" ; \
|
|
$(NM) $@ | sed -n 's/.* __export_symbol_\(.*\)/EXPORT_SYMBOL(\1);/p' ; } | \
|
|
$(CPP) -D__GENKSYMS__ $(c_flags) -xc - | $(genksyms)
|
|
|
|
quiet_cmd_cc_symtypes_S = SYM $(quiet_modtag) $@
|
|
cmd_cc_symtypes_S = $(call cmd_gensymtypes_S,true,$@) >/dev/null
|
|
|
|
$(obj)/%.symtypes : $(src)/%.S FORCE
|
|
$(call cmd,cc_symtypes_S)
|
|
|
|
|
|
quiet_cmd_cpp_s_S = CPP $(quiet_modtag) $@
|
|
cmd_cpp_s_S = $(CPP) $(a_flags) -o $@ $<
|
|
|
|
$(obj)/%.s: $(src)/%.S FORCE
|
|
$(call if_changed_dep,cpp_s_S)
|
|
|
|
quiet_cmd_as_o_S = AS $(quiet_modtag) $@
|
|
cmd_as_o_S = $(CC) $(a_flags) -c -o $@ $< $(cmd_objtool)
|
|
|
|
ifdef CONFIG_ASM_MODVERSIONS
|
|
|
|
# versioning matches the C process described above, with difference that
|
|
# we parse asm-prototypes.h C header to get function definitions.
|
|
|
|
cmd_gen_symversions_S = $(call gen_symversions,S)
|
|
|
|
endif
|
|
|
|
$(obj)/%.o: $(src)/%.S FORCE
|
|
$(call if_changed_rule,as_o_S)
|
|
|
|
targets += $(filter-out $(subdir-builtin), $(real-obj-y))
|
|
targets += $(filter-out $(subdir-modorder), $(real-obj-m))
|
|
targets += $(real-dtb-y) $(lib-y) $(always-y)
|
|
|
|
# Linker scripts preprocessor (.lds.S -> .lds)
|
|
# ---------------------------------------------------------------------------
|
|
quiet_cmd_cpp_lds_S = LDS $@
|
|
cmd_cpp_lds_S = $(CPP) $(cpp_flags) -P -U$(ARCH) \
|
|
-D__ASSEMBLY__ -DLINKER_SCRIPT -o $@ $<
|
|
|
|
$(obj)/%.lds: $(src)/%.lds.S FORCE
|
|
$(call if_changed_dep,cpp_lds_S)
|
|
|
|
# ASN.1 grammar
|
|
# ---------------------------------------------------------------------------
|
|
quiet_cmd_asn1_compiler = ASN.1 $(basename $@).[ch]
|
|
cmd_asn1_compiler = $(objtree)/scripts/asn1_compiler $< \
|
|
$(basename $@).c $(basename $@).h
|
|
|
|
$(obj)/%.asn1.c $(obj)/%.asn1.h: $(src)/%.asn1 $(objtree)/scripts/asn1_compiler
|
|
$(call cmd,asn1_compiler)
|
|
|
|
# Build the compiled-in targets
|
|
# ---------------------------------------------------------------------------
|
|
|
|
# To build objects in subdirs, we need to descend into the directories
|
|
$(subdir-builtin): $(obj)/%/built-in.a: $(obj)/% ;
|
|
$(subdir-modorder): $(obj)/%/modules.order: $(obj)/% ;
|
|
$(subdir-dtbslist): $(obj)/%/dtbs-list: $(obj)/% ;
|
|
|
|
#
|
|
# Rule to compile a set of .o files into one .a file (without symbol table)
|
|
#
|
|
# To make this rule robust against "Argument list too long" error,
|
|
# remove $(obj)/ prefix, and restore it by a shell command.
|
|
|
|
quiet_cmd_ar_builtin = AR $@
|
|
cmd_ar_builtin = rm -f $@; \
|
|
$(if $(real-prereqs), printf "$(obj)/%s " $(patsubst $(obj)/%,%,$(real-prereqs)) | xargs) \
|
|
$(AR) cDPrST $@
|
|
|
|
$(obj)/built-in.a: $(real-obj-y) FORCE
|
|
$(call if_changed,ar_builtin)
|
|
|
|
#
|
|
# Rule to create modules.order and dtbs-list
|
|
#
|
|
# This is a list of build artifacts (module or dtb) from the current Makefile
|
|
# and its sub-directories. The timestamp should be updated when any of the
|
|
# member files.
|
|
|
|
cmd_gen_order = { $(foreach m, $(real-prereqs), \
|
|
$(if $(filter %/$(notdir $@), $m), cat $m, echo $m);) :; } \
|
|
> $@
|
|
|
|
$(obj)/modules.order: $(obj-m) FORCE
|
|
$(call if_changed,gen_order)
|
|
|
|
$(obj)/dtbs-list: $(dtb-y) FORCE
|
|
$(call if_changed,gen_order)
|
|
|
|
#
|
|
# Rule to compile a set of .o files into one .a file (with symbol table)
|
|
#
|
|
|
|
$(obj)/lib.a: $(lib-y) FORCE
|
|
$(call if_changed,ar)
|
|
|
|
quiet_cmd_ld_multi_m = LD [M] $@
|
|
cmd_ld_multi_m = $(LD) $(ld_flags) -r -o $@ @$< $(cmd_objtool)
|
|
|
|
define rule_ld_multi_m
|
|
$(call cmd_and_savecmd,ld_multi_m)
|
|
$(call cmd,gen_objtooldep)
|
|
endef
|
|
|
|
$(multi-obj-m): objtool-enabled := $(delay-objtool)
|
|
$(multi-obj-m): part-of-module := y
|
|
$(multi-obj-m): %.o: %.mod FORCE
|
|
$(call if_changed_rule,ld_multi_m)
|
|
$(call multi_depend, $(multi-obj-m), .o, -objs -y -m)
|
|
|
|
# Add intermediate targets:
|
|
# When building objects with specific suffix patterns, add intermediate
|
|
# targets that the final targets are derived from.
|
|
intermediate_targets = $(foreach sfx, $(2), \
|
|
$(patsubst %$(strip $(1)),%$(sfx), \
|
|
$(filter %$(strip $(1)), $(targets))))
|
|
# %.asn1.o <- %.asn1.[ch] <- %.asn1
|
|
# %.dtb.o <- %.dtb.S <- %.dtb <- %.dts
|
|
# %.dtbo.o <- %.dtbo.S <- %.dtbo <- %.dtso
|
|
# %.lex.o <- %.lex.c <- %.l
|
|
# %.tab.o <- %.tab.[ch] <- %.y
|
|
targets += $(call intermediate_targets, .asn1.o, .asn1.c .asn1.h) \
|
|
$(call intermediate_targets, .dtb.o, .dtb.S .dtb) \
|
|
$(call intermediate_targets, .dtbo.o, .dtbo.S .dtbo) \
|
|
$(call intermediate_targets, .lex.o, .lex.c) \
|
|
$(call intermediate_targets, .tab.o, .tab.c .tab.h)
|
|
|
|
# Build
|
|
# ---------------------------------------------------------------------------
|
|
|
|
$(obj)/: $(if $(KBUILD_BUILTIN), $(targets-for-builtin)) \
|
|
$(if $(KBUILD_MODULES), $(targets-for-modules)) \
|
|
$(subdir-ym) $(always-y)
|
|
@:
|
|
|
|
# Single targets
|
|
# ---------------------------------------------------------------------------
|
|
|
|
single-subdirs := $(foreach d, $(subdir-ym), $(if $(filter $d/%, $(MAKECMDGOALS)), $d))
|
|
single-subdir-goals := $(filter $(addsuffix /%, $(single-subdirs)), $(MAKECMDGOALS))
|
|
|
|
$(single-subdir-goals): $(single-subdirs)
|
|
@:
|
|
|
|
# Descending
|
|
# ---------------------------------------------------------------------------
|
|
|
|
PHONY += $(subdir-ym)
|
|
$(subdir-ym):
|
|
$(Q)$(MAKE) $(build)=$@ \
|
|
need-builtin=$(if $(filter $@/built-in.a, $(subdir-builtin)),1) \
|
|
need-modorder=$(if $(filter $@/modules.order, $(subdir-modorder)),1) \
|
|
$(filter $@/%, $(single-subdir-goals))
|
|
|
|
# Add FORCE to the prequisites of a target to force it to be always rebuilt.
|
|
# ---------------------------------------------------------------------------
|
|
|
|
PHONY += FORCE
|
|
|
|
FORCE:
|
|
|
|
targets += $(filter-out $(single-subdir-goals), $(MAKECMDGOALS))
|
|
targets := $(filter-out $(PHONY), $(targets))
|
|
|
|
# Read all saved command lines and dependencies for the $(targets) we
|
|
# may be building above, using $(if_changed{,_dep}). As an
|
|
# optimization, we don't need to read them if the target does not
|
|
# exist, we will rebuild anyway in that case.
|
|
|
|
existing-targets := $(wildcard $(sort $(targets)))
|
|
|
|
-include $(foreach f,$(existing-targets),$(dir $(f)).$(notdir $(f)).cmd)
|
|
|
|
# Create directories for object files if they do not exist
|
|
obj-dirs := $(sort $(patsubst %/,%, $(dir $(targets))))
|
|
# If targets exist, their directories apparently exist. Skip mkdir.
|
|
existing-dirs := $(sort $(patsubst %/,%, $(dir $(existing-targets))))
|
|
obj-dirs := $(strip $(filter-out $(existing-dirs), $(obj-dirs)))
|
|
ifneq ($(obj-dirs),)
|
|
$(shell mkdir -p $(obj-dirs))
|
|
endif
|
|
|
|
.PHONY: $(PHONY)
|