Re: [UNIKRAFT PATCH v2 2/2] build/lto: Support LTO on gcc-10

[Vlad-Andrei BĂDOIU <vlad_andrei.badoiu@xxxxxx>]

Hi Sharan,

Thank you, works great!

Reviewed-by: Vlad-Andrei Badoiu <vlad_andrei.badoiu@xxxxxx>

----- Original Message -----
From: "Sharan Santhanam" <sharan.santhanam@xxxxxxxxx>
To: "minios-devel" <minios-devel@xxxxxxxxxxxxx>
Cc: "Sharan Santhanam" <sharan.santhanam@xxxxxxxxx>
Sent: Thursday, February 4, 2021 8:12:16 PM
Subject: [UNIKRAFT PATCH v2 2/2] build/lto: Support LTO on gcc-10

To support LTO with incremental builds, we need to add the
`-flinker-output=nolto-rel` linker flag.

Signed-off-by: Sharan Santhanam <sharan.santhanam@xxxxxxxxx>
---
 Makefile.uk | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/Makefile.uk b/Makefile.uk
index c3bb361..a88d512 100644
--- a/Makefile.uk
+++ b/Makefile.uk
@@ -58,4 +58,6 @@ COMPFLAGS-$(call gcc_version_ge,6,1)  += -fno-PIC
 LDFLAGS-$(call gcc_version_ge,6,1)     += -no-pie
 ifeq ($(call gcc_version_ge,10,0),y)
 COMPFLAGS-y += -fhosted -ffreestanding -fno-tree-loop-distribute-patterns
+LIBLDFLAGS-$(CONFIG_OPTIMIZE_LTO) += -flinker-output=nolto-rel
+LDFLAGS-$(CONFIG_OPTIMIZE_LTO) += -flinker-output=nolto-rel
 endif
-- 
2.7.4