[XS] Change in coreboot[main]: libpayload/Makefile.payload: Add lto flags

[Nico Huber (Code Review)]

Nico Huber has submitted this change. ( https://review.coreboot.org/c/coreboot/+/84015?usp=email )

(

2 is the latest approved patch-set.
No files were changed between the latest approved patch-set and the submitted one.
 )Change subject: libpayload/Makefile.payload: Add lto flags
......................................................................

libpayload/Makefile.payload: Add lto flags

Change-Id: If4496e300dd239b8652285bab05c2f68a51b4437
Signed-off-by: Arthur Heymans 
Reviewed-on: https://review.coreboot.org/c/coreboot/+/84015
Reviewed-by: Nico Huber 
Tested-by: build bot (Jenkins) 
---
M payloads/libpayload/Makefile.payload
1 file changed, 3 insertions(+), 0 deletions(-)

Approvals:
  Nico Huber: Looks good to me, approved
  build bot (Jenkins): Verified

diff --git a/payloads/libpayload/Makefile.payload b/payloads/libpayload/Makefile.payload
index d2860bf..2eafd4b 100644
--- a/payloads/libpayload/Makefile.payload
+++ b/payloads/libpayload/Makefile.payload
@@ -85,6 +85,9 @@
 CFLAGS  = $(CFLAGS_$(ARCH))
 CFLAGS += -Os -ffreestanding
 CFLAGS += -Wall -Wextra -Wmissing-prototypes -Wvla -Werror
+ifeq ($(CONFIG_LP_LTO),y)
+CFLAGS += -flto
+endif

# `lpgcc` in in-tree mode:
 LPGCC  = CC="$(CCACHE) $(CC_$(ARCH))"