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Commit 43c9127d authored by Nicholas Piggin's avatar Nicholas Piggin Committed by Michael Ellerman
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powerpc: Add option to use thin archives 



Add an option to use thin archives to build the kernel.
Thin archives are explained in commit a5967db9 ("kbuild: allow
architectures to use thin archives instead of ld -r").

This is a gradual way to introduce the option to testers.

Some change to the way we invoke ar is required so it can be used
by scripts/link-vmlinux.sh.

Signed-off-by: default avatarStephen Rothwell <sfr@canb.auug.org.au>
Signed-off-by: default avatarNicholas Piggin <npiggin@gmail.com>
[mpe: Make it an explicit option not dependant on COMPILE_TEST]
Signed-off-by: default avatarMichael Ellerman <mpe@ellerman.id.au>
parent 5e9d0e3d

arch/powerpc/Kconfig

+8 −0
Original line number Diff line number Diff line
@@ -396,6 +396,14 @@ config MPROFILE_KERNEL 
	depends on PPC64 && CPU_LITTLE_ENDIAN

	def_bool !DISABLE_MPROFILE_KERNEL



config USE_THIN_ARCHIVES

	bool "Build the kernel using thin archives"

	default n

	select THIN_ARCHIVES

	help

	  Build the kernel using thin archives.

	  If you're unsure say N.



config IOMMU_HELPER

	def_bool PPC64

arch/powerpc/Makefile

+2 −2
Original line number Diff line number Diff line
@@ -23,7 +23,7 @@ CROSS32AR := $(CROSS32_COMPILE)ar 
ifeq ($(HAS_BIARCH),y)

ifeq ($(CROSS32_COMPILE),)

CROSS32CC	:= $(CC) -m32

CROSS32AR	:= GNUTARGET=elf32-powerpc $(AR)

KBUILD_ARFLAGS	+= --target=elf32-powerpc

endif

endif
@@ -85,7 +85,7 @@ ifeq ($(HAS_BIARCH),y) 
override AS	+= -a$(BITS)

override LD	+= -m elf$(BITS)$(LDEMULATION)

override CC	+= -m$(BITS)

override AR	:= GNUTARGET=elf$(BITS)-$(GNUTARGET) $(AR)

KBUILD_ARFLAGS	+= --target=elf$(BITS)-$(GNUTARGET)

endif



LDFLAGS_vmlinux-y := -Bstatic