[Xen-changelog] [xen staging] x86: fix efi.lds dependency generation

[p***@xen.org]

commit 30311d2e82a3eb69aa1667382a6b2529f6d944c4
Author: Wei Liu <***@citrix.com>
AuthorDate: Fri Nov 16 18:58:55 2018 +0000
Commit: Wei Liu <***@citrix.com>
CommitDate: Mon Nov 19 11:09:51 2018 +0000

x86: fix efi.lds dependency generation

RANDCONFIG builds discover efi.lds is not updated when autogenerated
headers are updated.

Upon inspection, the generated .d file contains xen.lds.o as target,
not the once thought efi.lds.o. That's because gcc disregards the
output object name specified by -o when generating dependency, so the
sed invocation has no effect.

Arguably that's a bug in gcc, which can be fixed at some point, so we
make the sed rune work with *.lds. At the same time replace the
hardcoded sed rune for xen.lds with the new one.

Signed-off-by: Wei Liu <***@citrix.com>
Acked-by: Jan Beulich <***@suse.com>
---
xen/arch/x86/Makefile | 6 +++---
1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/xen/arch/x86/Makefile b/xen/arch/x86/Makefile
index 162b0b94c0..484dcb7ce7 100644
--- a/xen/arch/x86/Makefile
+++ b/xen/arch/x86/Makefile
@@ -234,12 +234,12 @@ $(BASEDIR)/include/asm-x86/asm-macros.h: asm-macros.i Makefile

xen.lds: xen.lds.S
$(CC) -P -E -Ui386 $(filter-out -Wa$(comma)%,$(AFLAGS)) -o $@ $<
- sed -e 's/xen\.lds\.o:/xen\.lds:/g' <.xen.lds.d >.xen.lds.d.new
- mv -f .xen.lds.d.new .xen.lds.d
+ sed -e 's/.*\.lds\.o:/$(@F):/g' <.$(@F).d >.$(@F).d.new
+ mv -f .$(@F).d.new .$(@F).d

efi.lds: xen.lds.S
$(CC) -P -E -Ui386 -DEFI $(filter-out -Wa$(comma)%,$(AFLAGS)) -o $@ $<
- sed -e 's/efi\.lds\.o:/efi\.lds:/g' <.$(@F).d >.$(@F).d.new
+ sed -e 's/.*\.lds\.o:/$(@F):/g' <.$(@F).d >.$(@F).d.new
mv -f .$(@F).d.new .$(@F).d

boot/mkelf32: boot/mkelf32.c
--
generated by git-patchbot for /home/xen/git/xen.git#staging