1# This option enables LTO for stage2 and stage3 in slim mode 2 3STAGE2_CFLAGS += -flto=jobserver -frandom-seed=1 4STAGE3_CFLAGS += -flto=jobserver -frandom-seed=1 5STAGEprofile_CFLAGS += -flto=jobserver -frandom-seed=1 6STAGEtrain_CFLAGS += -flto=jobserver -frandom-seed=1 7STAGEfeedback_CFLAGS += -flto=jobserver -frandom-seed=1 8 9# assumes the host supports the linker plugin 10LTO_AR = $$r/$(HOST_SUBDIR)/prev-gcc/gcc-ar$(exeext) -B$$r/$(HOST_SUBDIR)/prev-gcc/ 11LTO_RANLIB = $$r/$(HOST_SUBDIR)/prev-gcc/gcc-ranlib$(exeext) -B$$r/$(HOST_SUBDIR)/prev-gcc/ 12LTO_NM = $$r/$(HOST_SUBDIR)/prev-gcc/gcc-nm$(exeext) -B$$r/$(HOST_SUBDIR)/prev-gcc/ 13 14LTO_EXPORTS = AR="$(LTO_AR)"; export AR; \ 15 RANLIB="$(LTO_RANLIB)"; export RANLIB; \ 16 NM="$(LTO_NM)"; export NM; 17LTO_FLAGS_TO_PASS = AR="$(LTO_AR)" RANLIB="$(LTO_RANLIB)" NM="$(LTO_NM)" 18 19do-compare = $(SHELL) $(srcdir)/contrib/compare-lto $$f1 $$f2 20extra-compare = gcc/lto1$(exeext) 21