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      1 # This BUILD_CONFIG option is a bit like bootstrap-debug, but rather
      2 # than comparing stripped object files, it compares compiler internal
      3 # state during stage3.  Both can be used simultaneously.
      4 
      5 # This makes it slower than bootstrap-debug alone, for there's
      6 # additional dumping and recompilation during stage3.
      7 # bootstrap-debug-big can avoid the recompilation, if plenty of disk
      8 # space is available.
      9 
     10 STAGE2_CFLAGS += -fcompare-debug=
     11 STAGE3_CFLAGS += -fcompare-debug
     12 do-compare = $(SHELL) $(srcdir)/contrib/compare-debug $$f1 $$f2
     13