hostapd: build with LTO enabled (using jobserver for parallel build)

Signed-off-by: Felix Fietkau <nbd@nbd.name>
(backported from 6dac92a42e052f89971762173daabb7fd84742ef)

diff --git a/package/network/services/hostapd/Makefile b/package/network/services/hostapd/Makefile
index dacdf701b9650c0648e0a76b254b65998fcdb1be..25dcbaedd3c37ad1825d5b0aa95128abca9bfd2a 100644 (file)
--- a/package/network/services/hostapd/Makefile
+++ b/package/network/services/hostapd/Makefile
@@ -412,8 +412,8 @@ TARGET_CPPFLAGS := \
        -D_GNU_SOURCE \
        $(if $(CONFIG_WPA_MSG_MIN_PRIORITY),-DCONFIG_MSG_MIN_PRIORITY=$(CONFIG_WPA_MSG_MIN_PRIORITY))
 
-TARGET_CFLAGS += -ffunction-sections -fdata-sections
-TARGET_LDFLAGS += -Wl,--gc-sections
+TARGET_CFLAGS += -ffunction-sections -fdata-sections -flto
+TARGET_LDFLAGS += -Wl,--gc-sections -flto=jobserver -fuse-linker-plugin
 ifeq ($(findstring supplicant,$(BUILD_VARIANT)),)
   TARGET_LDFLAGS += -lubox -lubus
 endif
@@ -429,6 +429,7 @@ define Build/RunMake
                $(DRIVER_MAKEOPTS) \
                LIBS="$(TARGET_LDFLAGS)" \
                LIBS_c="$(TARGET_LDFLAGS_C)" \
+               AR="$(TARGET_CROSS)gcc-ar" \
                BCHECK= \
                $(2)
 endef
@@ -450,7 +451,7 @@ define Build/Compile/wpad
                MULTICALL=1 \
                wpa_cli wpa_supplicant_multi.a \
        )
-       $(TARGET_CC) -o $(PKG_BUILD_DIR)/wpad \
+       +export MAKEFLAGS="$(MAKE_JOBSERVER)"; $(TARGET_CC) -o $(PKG_BUILD_DIR)/wpad \
                $(TARGET_CFLAGS) \
                ./files/multicall.c \
                $(PKG_BUILD_DIR)/hostapd/hostapd_multi.a \

diff --git a/package/network/services/hostapd/patches/500-lto-jobserver-support.patch b/package/network/services/hostapd/patches/500-lto-jobserver-support.patch
new file mode 100644 (file)
index 0000000..a65ad9c
--- /dev/null
+++ b/package/network/services/hostapd/patches/500-lto-jobserver-support.patch
@@ -0,0 +1,50 @@
+--- a/hostapd/Makefile
++++ b/hostapd/Makefile
+@@ -1290,14 +1290,14 @@ hostapd_multi.a: $(BCHECK) $(OBJS)
+       @$(AR) cr $@ hostapd_multi.o $(OBJS)
+ 
+ hostapd: $(BCHECK) $(OBJS)
+-      $(Q)$(CC) $(LDFLAGS) -o hostapd $(OBJS) $(LIBS)
++      +$(Q)$(CC) $(LDFLAGS) -o hostapd $(OBJS) $(LIBS)
+       @$(E) "  LD " $@
+ 
+ ifdef CONFIG_WPA_TRACE
+ OBJS_c += ../src/utils/trace.o
+ endif
+ hostapd_cli: $(OBJS_c)
+-      $(Q)$(CC) $(LDFLAGS) -o hostapd_cli $(OBJS_c) $(LIBS_c)
++      +$(Q)$(CC) $(LDFLAGS) -o hostapd_cli $(OBJS_c) $(LIBS_c)
+       @$(E) "  LD " $@
+ 
+ NOBJS = nt_password_hash.o ../src/crypto/ms_funcs.o $(SHA1OBJS)
+--- a/wpa_supplicant/Makefile
++++ b/wpa_supplicant/Makefile
+@@ -1921,23 +1921,23 @@ wpa_supplicant_multi.a: .config $(BCHECK
+       @$(AR) cr $@ wpa_supplicant_multi.o $(OBJS)
+ 
+ wpa_supplicant: $(BCHECK) $(OBJS) $(EXTRA_progs)
+-      $(Q)$(LDO) $(LDFLAGS) -o wpa_supplicant $(OBJS) $(LIBS) $(EXTRALIBS)
++      +$(Q)$(LDO) $(LDFLAGS) -o wpa_supplicant $(OBJS) $(LIBS) $(EXTRALIBS)
+       @$(E) "  LD " $@
+ 
+ eapol_test: $(OBJS_t)
+-      $(Q)$(LDO) $(LDFLAGS) -o eapol_test $(OBJS_t) $(LIBS)
++      +$(Q)$(LDO) $(LDFLAGS) -o eapol_test $(OBJS_t) $(LIBS)
+       @$(E) "  LD " $@
+ 
+ preauth_test: $(OBJS_t2)
+-      $(Q)$(LDO) $(LDFLAGS) -o preauth_test $(OBJS_t2) $(LIBS)
++      +$(Q)$(LDO) $(LDFLAGS) -o preauth_test $(OBJS_t2) $(LIBS)
+       @$(E) "  LD " $@
+ 
+ wpa_passphrase: $(OBJS_p)
+-      $(Q)$(LDO) $(LDFLAGS) -o wpa_passphrase $(OBJS_p) $(LIBS_p) $(LIBS)
++      +$(Q)$(LDO) $(LDFLAGS) -o wpa_passphrase $(OBJS_p) $(LIBS_p) $(LIBS)
+       @$(E) "  LD " $@
+ 
+ wpa_cli: $(OBJS_c)
+-      $(Q)$(LDO) $(LDFLAGS) -o wpa_cli $(OBJS_c) $(LIBS_c)
++      +$(Q)$(LDO) $(LDFLAGS) -o wpa_cli $(OBJS_c) $(LIBS_c)
+       @$(E) "  LD " $@
+ 
+ LIBCTRL += ../src/common/wpa_ctrl.o