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