"make bubblestrap" weirdness

[Kelley Cook]

Kelley Cook wrote:

>> In recent CVS checkouts of GCC mainline, I have noticed a
>> weird bootstrapping issue. The steps are:
>>
>>   1. make bootstrap
>>   2. touch $GCC_SRC_DIR/gcc/java/check-init.c
>>   3. make bubblestrap
>>   4. touch $GCC_SRC_DIR/gcc/java/check-init.c
>>   5. make bubblestrap
>>
>> In step #3, I see "genattrab" and other "gen*" programs
>> running once again, while in #5 (and subsequent such
>> iterations) they don't. I have seen this on two separate
>> x86-Linux boxen.
>
>
> It seems that you've discovered a regression from 3.4.  Unfortunately, 
> it likely is related to my moving the GCC build executables into a 
> build/ directory.
>
> Please create a new PR and feel free to assign it to me 
> <kcook@gcc.gnu.org>.
>
Please try this patch.

Bootstrapped and bubblestrapped on i686-pc-cygwin

BTW, OK to install; it doesn't hurt anything besides running few more 
tiny scripts in every stage.

diff -prcd gcc-orig/gcc/Makefile.in gcc-snapshot/gcc/Makefile.in
*** gcc-orig/gcc/Makefile.in    Wed Jan  5 12:31:37 2005
--- gcc-snapshot/gcc/Makefile.in        Wed Jan 12 16:30:33 2005
*************** STAGECOPYSTUFF = insn-flags.h insn-confi
*** 950,959 ****
   genrtl.c genrtl.h gt-*.h gtype-*.h gtype-desc.c gtyp-gen.h

  # Files to be moved away after each stage in building.
! STAGEMOVESTUFF = *$(objext) \
!  s-flags s-config s-codes s-mlib s-genrtl s-modes s-gtype \
!  s-gtyp-gen s-output s-recog s-emit s-extract s-peep s-check 
s-conditions \
!  s-attr s-attrtab s-opinit s-preds s-constants s-crt0 \
   xgcc$(exeext) cpp$(exeext) cc1$(exeext) $(EXTRA_PASSES) \
   $(EXTRA_PARTS) $(EXTRA_PROGRAMS) gcc-cross$(exeext) \
   protoize$(exeext) unprotoize$(exeext) \
--- 950,956 ----
   genrtl.c genrtl.h gt-*.h gtype-*.h gtype-desc.c gtyp-gen.h

  # Files to be moved away after each stage in building.
! STAGEMOVESTUFF = *$(objext) s-* \
   xgcc$(exeext) cpp$(exeext) cc1$(exeext) $(EXTRA_PASSES) \
   $(EXTRA_PARTS) $(EXTRA_PROGRAMS) gcc-cross$(exeext) \
   protoize$(exeext) unprotoize$(exeext) \
Only in gcc-snapshot/gcc/config/i386: i386.md.patch