config/bootstrap-lto.mk

   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)