iw: compile with LTO enabled

Reduces .ipk size on MIPS from 34k to 33k

Signed-off-by: Felix Fietkau <nbd@nbd.name>
(backported from ef16a394d2b24a363b50b5b4720cb23fe156c9da)

diff --git a/package/network/utils/iw/Makefile b/package/network/utils/iw/Makefile
index a11768268c430f3ecae339b676d4ff5a46810b89..ef39ee6724f54c6aa6125dcb5efc84e673d6cfe0 100644 (file)
--- a/package/network/utils/iw/Makefile
+++ b/package/network/utils/iw/Makefile
@@ -47,7 +47,8 @@ TARGET_CPPFLAGS:= \
        -I$(STAGING_DIR)/usr/include/libnl-tiny \
        $(TARGET_CPPFLAGS) \
        -DCONFIG_LIBNL20 \
-       -D_GNU_SOURCE
+       -D_GNU_SOURCE \
+       -flto
 
 ifeq ($(BUILD_VARIANT),full)
   TARGET_CPPFLAGS += -DIW_FULL
@@ -56,7 +57,7 @@ endif
 
 MAKE_FLAGS += \
        CFLAGS="$(TARGET_CPPFLAGS) $(TARGET_CFLAGS) -ffunction-sections -fdata-sections" \
-       LDFLAGS="$(TARGET_LDFLAGS) -Wl,--gc-sections" \
+       LDFLAGS="$(TARGET_LDFLAGS) -Wl,--gc-sections -flto" \
        NL1FOUND="" NL2FOUND=Y \
        NLLIBNAME="libnl-tiny" \
        LIBS="-lm -lnl-tiny" \