[Bug bootstrap/67156] config/bootstrap-debug.mk: STAGE2_CFLAGS += -gtoggle

[dilyan.palauzov at aegee dot org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=67156

--- Comment #2 from Дилян Палаузов <dilyan.palauzov at aegee dot org> ---
It is x86_64-pc-linux-gnu == host == target == build.

To what I see in the root Makefile (copied below) at the end of the build files
in stage2 and stage3 are compared with `cmp', which fails, if one file has
debugging information and the other does not, even if both files have identical
text/data/bss sections.
---
do-compare = cmp --ignore-initial=16 $$f1 $$f2

compare:
        @r=`${PWD_COMMAND}`; export r; \
        s=`cd $(srcdir); ${PWD_COMMAND}`; export s; \
        if test -f stage2-lean; then \
          echo Cannot compare object files as stage 2 was deleted.; \
          exit 0; \
        fi; \
        : $(MAKE); $(stage); \
        rm -f .bad_compare; \
        echo Comparing stages 2 and 3; \
        sed=`echo stage3 | sed 's,^stage,,;s,.,.,g'`; \
        files=`find stage3-* -name "*$(objext)" -print | \                      
                 sed -n s,^stage$$sed-,,p`; \
        for file in $${files}; do \
          f1=$$r/stage2-$$file; f2=$$r/stage3-$$file; \
          if test ! -f $$f1; then continue; fi; \
          $(do-compare) > /dev/null 2>&1; \
          if test $$? -eq 1; then \
            case $$file in \
              gcc/cc*-checksum$(objext) | gcc/ada/*tools/*) \
                echo warning: $$file differs ;; \
              *) \
                echo $$file differs >> .bad_compare ;; \
            esac; \
          fi; \
        done; \
        if [ -f .bad_compare ]; then \
          echo "Bootstrap comparison failure!"; \
          cat .bad_compare; \
          exit 1; \
        else \
          echo Comparison successful.; \
        fi; \
        $(STAMP) compare
        if $(LEAN); then \
          rm -rf stage2-*; \
          $(STAMP) stage2-lean; \
        fi