-# This option enables LTO for stage2 and stage3. It requires lto to
-# be enabled for stage1 with --enable-stage1-languages.
+# This option enables LTO for stage2 and stage3.
-STAGE2_CFLAGS += -flto
-STAGE3_CFLAGS += -flto
-
-# Ada fails to build with LTO, turn it off for now.
-BOOT_ADAFLAGS += -fno-lto
+STAGE2_CFLAGS += -flto=jobserver -frandom-seed=1
+STAGE3_CFLAGS += -flto=jobserver -frandom-seed=1
+STAGEprofile_CFLAGS += -fno-lto