Merge tag 'kbuild-thinar-v4.13' of...

KBUILD_VMLINUX_MAIN

--------------------------------------------------

All object files for the main part of vmlinux.

KBUILD_VMLINUX_INIT and KBUILD_VMLINUX_MAIN together specify

all the object files used to link vmlinux.

KBUILD_VMLINUX_LIBS

--------------------------------------------------

All .a "lib" files for vmlinux.

KBUILD_VMLINUX_INIT, KBUILD_VMLINUX_MAIN, and KBUILD_VMLINUX_LIBS together

specify all the object files used to link vmlinux.

====================== ===============  ========================================

GNU C                  3.2              gcc --version

GNU make               3.81             make --version

binutils               2.12             ld -v

binutils               2.20             ld -v

util-linux             2.10o            fdformat --version

module-init-tools      0.9.10           depmod -V

e2fsprogs              1.41.4           e2fsck -V

Binutils

--------

Linux on IA-32 has recently switched from using ``as86`` to using ``gas`` for

assembling the 16-bit boot code, removing the need for ``as86`` to compile

your kernel.  This change does, however, mean that you need a recent

release of binutils.

The build system has, as of 4.13, switched to using thin archives (`ar T`)

rather than incremental linking (`ld -r`) for built-in.o intermediate steps.

This requires binutils 2.20 or newer.

Perl

----

drivers-y	:= $(patsubst %/, %/built-in.o, $(drivers-y))

net-y		:= $(patsubst %/, %/built-in.o, $(net-y))

libs-y1		:= $(patsubst %/, %/lib.a, $(libs-y))

libs-y2		:= $(patsubst %/, %/built-in.o, $(libs-y))

libs-y		:= $(libs-y1) $(libs-y2)

libs-y2		:= $(filter-out %.a, $(patsubst %/, %/built-in.o, $(libs-y)))

virt-y		:= $(patsubst %/, %/built-in.o, $(virt-y))

# Externally visible symbols (used by link-vmlinux.sh)

export KBUILD_VMLINUX_INIT := $(head-y) $(init-y)

export KBUILD_VMLINUX_MAIN := $(core-y) $(libs-y) $(drivers-y) $(net-y) $(virt-y)

export KBUILD_VMLINUX_MAIN := $(core-y) $(libs-y2) $(drivers-y) $(net-y) $(virt-y)

export KBUILD_VMLINUX_LIBS := $(libs-y1)

export KBUILD_LDS          := arch/$(SRCARCH)/kernel/vmlinux.lds

export LDFLAGS_vmlinux

# used by scripts/pacmage/Makefile

export KBUILD_ALLDIRS := $(sort $(filter-out arch/%,$(vmlinux-alldirs)) arch Documentation include samples scripts tools)

vmlinux-deps := $(KBUILD_LDS) $(KBUILD_VMLINUX_INIT) $(KBUILD_VMLINUX_MAIN)

vmlinux-deps := $(KBUILD_LDS) $(KBUILD_VMLINUX_INIT) $(KBUILD_VMLINUX_MAIN) $(KBUILD_VMLINUX_LIBS)

# Include targets which we want to execute sequentially if the rest of the

# kernel build went well. If CONFIG_TRIM_UNUSED_KSYMS is set, this might be

endchoice

config THIN_ARCHIVES

	bool

	def_bool y

	help

	  Select this if the architecture wants to use thin archives

	  instead of ld -r to create the built-in.o files.

# The gate DSO image is built using a special linker script.

targets += gate.so gate-syms.o

targets += gate.so gate.lds gate.o gate-dummy.o

extra-y += gate.so gate-syms.o gate.lds gate.o

obj-y += gate-syms.o

CPPFLAGS_gate.lds := -P -C -U$(ARCH)

$(obj)/gate.so: $(obj)/gate.lds $(obj)/gate.o FORCE

	$(call if_changed,gate)

$(obj)/built-in.o: $(obj)/gate-syms.o

$(obj)/built-in.o: ld_flags += -R $(obj)/gate-syms.o

GATECFLAGS_gate-syms.o = -r

$(obj)/gate-syms.o: $(obj)/gate.lds $(obj)/gate.o FORCE

GATECFLAGS_gate-dummy.o = -r

$(obj)/gate-dummy.o: $(obj)/gate.lds $(obj)/gate.o FORCE

	$(call if_changed,gate)

LDFLAGS_gate-syms.o := -r -R

$(obj)/gate-syms.o: $(obj)/gate-dummy.o FORCE

	$(call if_changed,ld)

# gate-data.o contains the gate DSO image as data in section .data..gate.

# We must build gate.so before we can assemble it.

# Note: kbuild does not track this dependency due to usage of .incbin