kbuild: thin archives make default for all archs
Make thin archives build the default, but keep the config option
to allow exemptions if any breakage can't be quickly solved.
Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
diff --git a/Documentation/process/changes.rst b/Documentation/process/changes.rst
index e25d63f..68be1bb 100644
--- a/Documentation/process/changes.rst
+++ b/Documentation/process/changes.rst
@@ -31,7 +31,7 @@
====================== =============== ========================================
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
@@ -75,10 +75,9 @@
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
----
diff --git a/arch/Kconfig b/arch/Kconfig
index 6c00e5b..3abe581 100644
--- a/arch/Kconfig
+++ b/arch/Kconfig
@@ -511,7 +511,7 @@
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.
diff --git a/arch/powerpc/Kconfig b/arch/powerpc/Kconfig
index f7c8f99..80d882a 100644
--- a/arch/powerpc/Kconfig
+++ b/arch/powerpc/Kconfig
@@ -472,14 +472,6 @@
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
