compilation of egcs-980308 failed on solaris-2.5.x

[Gabriel Dos Reis <Gabriel dot Dos-Reis at dptmaths dot ens-cachan dot fr>]

I failed to compile successfully egcs-980308 on solaris-2.5 and
solaris-2.5.1. The failure point was the same:

% ./configure --prefix=$VOL/egcs --enable-shared --with-gnu-ld
[...]
% make bootstrap BOOT_CFLAGS="-mcpu=v8 -O2"
[...]

for file in ./frame.c  cplib2.txt  ; do \
  name=`echo ${file} | sed -e 's/[.][cSo]$//' -e 's/[.]asm$//' -e
's/[.]txt$//'`; \
  oname=` echo ${name} | sed -e 's,.*/,,'`; \
  if [ ${name}.txt = ${file} ]; then \
    for f in .. `cat ${file}`; do if [ x${f} != x.. ]; then \
      make GCC_FOR_TARGET="./xgcc -B./" \
        AR="ar" AR_FLAGS="rc" CC="gcc" \
        CFLAGS="-g" HOST_PREFIX="" \
        HOST_PREFIX_1="loser-" \
        LANGUAGES="c " \
        LIBGCC2_CFLAGS="-O2   -DIN_GCC  -DSVR4  -g -I./include  -fPIC
-g1 -DHAVE_GTHR_DEFAULT -DIN_LIBGCC2 -D__GCC_FLOAT_NOT_NEEDED
-fexceptions  " ${f}; \
      if [ $? -eq 0 ] ; then true; else exit 1; fi; \
      ar rc tmplibgcc2.a ${f}; \
      rm -f ${f}; \
    else true; \
    fi; done; \
  else \
    echo ${name}; \
    if [ ${name}.asm = ${file} ]; then \
      cp ${file} ${name}.s || exit 1; file=${name}.s; \
    else true; fi; \
    ./xgcc -B./ -O2   -DIN_GCC  -DSVR4  -g -I./include  -fPIC -g1
-DHAVE_GTHR_DEFAULT -DIN_LIBGCC2 -D__GCC_FLOAT_NOT_NEEDED -fexceptions
  -I. -I. -I./config -c ${file}; \
    if [ $? -eq 0 ] ; then true; else exit 1; fi; \
    ar rc tmplibgcc2.a ${oname}.o; \
    rm -f ${name}.s ${oname}.o; \
  fi; \
done
./frame
./frame.c: In function `execute_cfa_insn':
./frame.c:663: internal error--unrecognizable insn:
(jump_insn 615 614 616 (addr_diff_vec:SI (label_ref:SI 614)
        [ 
            (label_ref:SI 620)
            (label_ref:SI 114)
            (label_ref:SI 146)
            (label_ref:SI 166)
            (label_ref:SI 195)
            (label_ref:SI 230)
            (label_ref:SI 304)
            (label_ref:SI 620)
            (label_ref:SI 620)
            (label_ref:SI 333)
            (label_ref:SI 468)
            (label_ref:SI 496)
            (label_ref:SI 384)
            (label_ref:SI 424)
            (label_ref:SI 447)
            (label_ref:SI 597)
            (label_ref:SI 597)
            (label_ref:SI 597)
            (label_ref:SI 597)
            (label_ref:SI 597)
            (label_ref:SI 597)
            (label_ref:SI 597)
            (label_ref:SI 597)
            (label_ref:SI 597)
            (label_ref:SI 597)
            (label_ref:SI 597)
            (label_ref:SI 597)
            (label_ref:SI 597)
            (label_ref:SI 597)
            (label_ref:SI 597)
            (label_ref:SI 597)
            (label_ref:SI 597)
            (label_ref:SI 597)
            (label_ref:SI 597)
            (label_ref:SI 597)
            (label_ref:SI 597)
            (label_ref:SI 597)
            (label_ref:SI 597)
            (label_ref:SI 597)
            (label_ref:SI 597)
            (label_ref:SI 597)
            (label_ref:SI 597)
            (label_ref:SI 597)
            (label_ref:SI 597)
            (label_ref:SI 597)
            (label_ref:SI 520)
            (label_ref:SI 576)
        ] 
        (const_int 0)
        (const_int 0) 0) -1 (nil)
    (expr_list:REG_BR_PRED (const_int 12)
        (nil)))
xgcc: Internal compiler error: program cc1 got fatal signal 6
make[2]: *** [libgcc2.a] Error 1
make[2]: Leaving directory `/tmp/egcs-980308/gcc'
make[1]: *** [bootstrap] Error 2
make[1]: Leaving directory `/tmp/egcs-980308/gcc'
make: *** [bootstrap] Error 2


One machine was:
% uname -a 
SunOS jambon 5.5.1 Generic_103640-09 sun4u sparc SUNW,Ultra-2

other one:
% uname -a
SunOS piano 5.5 Generic_103093-14 sun4m sparc SUNW,SPARCstation-20