path: root/meta/classes/kernel.bbclass
diff options
authorBruce Ashfield <>2018-03-06 13:11:17 -0500
committerRichard Purdie <>2018-03-08 15:28:04 -0800
commit128dd9ec601fab4d213ffe703a79b0e8814ad907 (patch)
tree1fd23341f22f0c719e68fbff27a695e7eb976ed0 /meta/classes/kernel.bbclass
parent0fa0baed74dfc1d0b4245fd7c552a55c12ce6b23 (diff)
kernel: make copying of crtsavres.o conditional
As of the 4.13 kernel, there are configuration + linker combinations that do not need (or build) crtsavres.o for ppc64 targets. The commit of interest is: commit efe0160cfd40a99c052a00e174787c1f4158a9cd Author: Nicholas Piggin <> Date: Fri May 12 01:56:52 2017 +1000 powerpc/64: Linker on-demand sfpr functions for modules For final link, the powerpc64 linker generates fpr save/restore functions on-demand, placing them in the .sfpr section. Starting with binutils 2.25, these can be provided for non-final links with --save-restore-funcs. Use that where possible for module links. This saves about 200 bytes per module (~60kB) on powernv defconfig build. Signed-off-by: Nicholas Piggin <> Signed-off-by: Michael Ellerman <> As such, our arch test for crtsavres.o is not enough, we add a secondary existence check before trying the copy. [YOCTO #12576] (From OE-Core rev: af58819253a2d4526dc8871a17e1492bd1d92951) Signed-off-by: Bruce Ashfield <> Signed-off-by: Ross Burton <> Signed-off-by: Richard Purdie <>
Diffstat (limited to 'meta/classes/kernel.bbclass')
1 files changed, 4 insertions, 2 deletions
diff --git a/meta/classes/kernel.bbclass b/meta/classes/kernel.bbclass
index 321c0a47bb..9bc0e41251 100644
--- a/meta/classes/kernel.bbclass
+++ b/meta/classes/kernel.bbclass
@@ -466,8 +466,10 @@ do_shared_workdir () {
# arch/powerpc/lib/crtsavres.o which is present in
# KBUILD_LDFLAGS_MODULE, making it required to build external modules.
if [ ${ARCH} = "powerpc" ]; then
- mkdir -p $kerneldir/arch/powerpc/lib/
- cp arch/powerpc/lib/crtsavres.o $kerneldir/arch/powerpc/lib/crtsavres.o
+ if [ -e arch/powerpc/lib/crtsavres.o ]; then
+ mkdir -p $kerneldir/arch/powerpc/lib/
+ cp arch/powerpc/lib/crtsavres.o $kerneldir/arch/powerpc/lib/crtsavres.o
+ fi
if [ -d include/generated ]; then