CVS 20050818 (current CVS 4.0 doesn't build gfortran as well) shows:

/home/doko/gcc/gcc-snapshot-20050818/build/./gcc/xgcc
-B/home/doko/gcc/gcc-snapshot-20050818/build/./gcc/
-B/usr/lib/gcc-snapshot/m68k-linux-gnu/bin/
-B/usr/lib/gcc-snapshot/m68k-linux-gnu/lib/ -isystem
/usr/lib/gcc-snapshot/m68k-linux-gnu/include -isystem
/usr/lib/gcc-snapshot/m68k-linux-gnu/sys-include -DHAVE_CONFIG_H -I.
-I../../../src/libgfortran -I. -iquote../../../src/libgfortran/io -std=gnu99
-Wall -Wstrict-prototypes -Wmissing-prototypes -Wold-style-definition -Wextra
-Wwrite-strings -O2 -g -O2 -c ../../../src/libgfortran/intrinsics/stat.c  -fPIC
-DPIC -o .libs/stat.o
../../../src/libgfortran/intrinsics/stat.c: In function 'fstat_i8_sub':
../../../src/libgfortran/intrinsics/stat.c:448: error: unrecognizable insn:
(insn 84 83 85 10 ../../../src/libgfortran/intrinsics/stat.c:401 (set (mem:DI
(plus:SI (reg:SI 46)                (reg:SI 45)) [3 S8 A16])
        (zero_extend:DI (mem/s:SI (plus:SI (reg/f:SI 26 virtual-stack-vars)
                    (const_int -78 [0xffffffb2])) [6 sb.st_mode+0 S4 A16]))) -1
(nil)
    (nil))
../../../src/libgfortran/intrinsics/stat.c:448: internal compiler error: in
extract_insn, at recog.c:2084
Please submit a full bug report,
with preprocessed source if appropriate.
See <URL:http://gcc.gnu.org/bugs.html> for instructions.
make[5]: *** [stat.lo] Error 1
make[5]: Leaving directory
`/home/doko/gcc/gcc-snapshot-20050818/build/m68k-linux-gnu/libgfortran'make[4]:
*** [all] Error 2