[ruby-dev:12771] miniruby got segv on linux/m68k

Debian m68k(sid)で1.6.3がbuildできないようです. 
正確にはbuildの途中でsegvをくらってしまいます. 
./miniruby -Cext extmk.rbの中でくらうようです. 
一応traceをとってみたのですが, これで役に立つでしょうか?

#0  0xc00cb572 in realloc () from /lib/libc.so.6
#1  0x80022a12 in ruby_xrealloc (ptr=0x800e84f0, size=1355) at gc.c:137
#2  0x8005a9a0 in rb_str_cat (str=3222574984,
    ptr=0x800e5158 "        inet4++;\n", len=17) at string.c:440
#3  0x8005aa82 in rb_str_append (str1=3222574984, str2=3222973728)
    at string.c:464
#4  0x8003f4a4 in here_document (term=69, indent=0) at parse.y:2751
#5  0x80040824 in rb_yylex () at parse.y:2948
#6  0x80038f88 in rb_yyparse () at /usr/share/bison/bison.simple:432
#7  0x8003bfb2 in yycompile (
    f=0x800e2950 "/home/akira/deb.tmp/ruby/ruby-1.6.3/build-tree/ruby-1.6.3/ext/socket/extconf.rb", line=1) at parse.y:1982
#8  0x8003c210 in rb_compile_file (
    f=0x800e2848 "/home/akira/deb.tmp/ruby/ruby-1.6.3/build-tree/ruby-1.6.3/ext/socket/extconf.rb", file=3222590664, start=1) at parse.y:2064
#9  0x80056f6a in load_file (
    fname=0x800e2848 "/home/akira/deb.tmp/ruby/ruby-1.6.3/build-tree/ruby-1.6.3/ext/socket/extconf.rb", script=0) at ruby.c:829
#10 0x80056fbe in rb_load_file (
    fname=0x800e2848 "/home/akira/deb.tmp/ruby/ruby-1.6.3/build-tree/ruby-1.6.3/ext/socket/extconf.rb") at ruby.c:842
#11 0x80017df6 in rb_load (fname=3222590724, wrap=0) at eval.c:5132
#12 0x800180ea in rb_f_load (argc=1, argv=0xefffca20) at eval.c:5184
#13 0x80015b2a in call_cfunc (func=0x800180a2 <rb_f_load>, recv=3222768784,
    len=-1, argc=1, argv=0xefffca20) at eval.c:4156
#14 0x8001606c in rb_call0 (klass=3222772884, recv=3222768784, id=8441,
    argc=1, argv=0xefffca20, body=0xc016cc88, nosuper=1) at eval.c:4295
#15 0x80016788 in rb_call (klass=3222772884, recv=3222768784, mid=8441,
    argc=1, argv=0xefffca20, scope=1) at eval.c:4494
#16 0x80011a7c in rb_eval (self=3222768784, n=0xc015ad94) at eval.c:2502
#17 0x8001043a in rb_eval (self=3222768784, n=0xc015bc6c) at eval.c:1988
#18 0x800112d0 in rb_eval (self=3222768784, n=0xc015ca7c) at eval.c:2368
#19 0x80016400 in rb_call0 (klass=3222773024, recv=3222768784, id=9705,
    argc=0, argv=0xefffe190, body=0xc015ca7c, nosuper=0) at eval.c:4407
#20 0x80016788 in rb_call (klass=3222773024, recv=3222768784, mid=9705,
    argc=1, argv=0xefffe18c, scope=1) at eval.c:4494
#21 0x80011a7c in rb_eval (self=3222768784, n=0xc0158fbc) at eval.c:2502
#22 0x8001467c in rb_yield_0 (val=3222619324, self=3222768784, klass=0,
    acheck=0) at eval.c:3551
#23 0x800148a6 in rb_yield (val=3222619324) at eval.c:3635
#24 0x8006650e in rb_ary_each (ary=3222619704) at array.c:629
#25 0x80015b32 in call_cfunc (func=0x800664ec <rb_ary_each>, recv=3222619704,
    len=0, argc=0, argv=0x0) at eval.c:4159
#26 0x8001606c in rb_call0 (klass=3222744644, recv=3222619704, id=3561,
    argc=0, argv=0x0, body=0xc0172a70, nosuper=1) at eval.c:4295
#27 0x80016788 in rb_call (klass=3222744644, recv=3222619704, mid=3561,
    argc=0, argv=0x0, scope=0) at eval.c:4494
#28 0x80010df0 in rb_eval (self=3222768784, n=0xc015888c) at eval.c:2252
#29 0x8001043a in rb_eval (self=3222768784, n=0xc016bb1c) at eval.c:1988
#30 0x8000e562 in eval_node (self=3222768784, node=0xc016bb1c) at eval.c:1076
#31 0x8000e93c in ruby_run () at eval.c:1206
#32 0x8000d02e in main (argc=3, argv=0xeffffcc4, envp=0xeffffcd4) at main.c:50
#33 0xc008d400 in __libc_start_main () from /lib/libc.so.6