[openwrt/openwrt] libnftnl: Activate link time optimization (LTO)

[LEDE Commits]

hauke pushed a commit to openwrt/openwrt.git, branch master:
https://git.openwrt.org/56c2e9fe3732ef2cb1f7d764490655e909f63498

commit 56c2e9fe3732ef2cb1f7d764490655e909f63498
Author: Hauke Mehrtens <hauke at hauke-m.de>
AuthorDate: Tue Sep 1 14:04:22 2020 +0200

    libnftnl: Activate link time optimization (LTO)
    
    The ipk sizes for mips_24Kc change like this:
    old:
    libnftnl12_1.1.7-1_mips_24kc.ipk        47.459
    
    new:
    libnftnl12_1.1.7-2_mips_24kc.ipk        45.742
    
    Signed-off-by: Hauke Mehrtens <hauke at hauke-m.de>
---
 package/libs/libnftnl/Makefile | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/package/libs/libnftnl/Makefile b/package/libs/libnftnl/Makefile
index 3d8d68ad5f..c56fb068ce 100644
--- a/package/libs/libnftnl/Makefile
+++ b/package/libs/libnftnl/Makefile
@@ -9,7 +9,7 @@ include $(TOPDIR)/rules.mk
 
 PKG_NAME:=libnftnl
 PKG_VERSION:=1.1.7
-PKG_RELEASE:=1
+PKG_RELEASE:=2
 
 PKG_SOURCE:=$(PKG_NAME)-$(PKG_VERSION).tar.bz2
 PKG_SOURCE_URL:=https://netfilter.org/projects/$(PKG_NAME)/files
@@ -39,7 +39,8 @@ define Package/libnftnl/description
  programming interface (API) to the in-kernel nf_tables subsystem.
 endef
 
-TARGET_CFLAGS += $(FPIC)
+TARGET_CFLAGS += $(FPIC) -flto
+TARGET_LDFLAGS += -flto
 
 CONFIGURE_ARGS += \
 	--enable-static \