[3.4 bib] bootstrap failure on irix6.5

[Billinghurst, David (CRTS)]

Just tried to build 3.4 bib on irix6.5.  It fails in stage 1 with

cc -c   -g  -DIN_GCC     -DHAVE_CONFIG_H    -I. -I. -I/exd2/billingd/src/gcc-3.4-bib/gcc -I/exd2/billingd/src/gcc-3.4-bib/gcc/. -I/exd2/billingd/src/gcc-3.4-bib/gcc/config -I/exd2/billingd/src/gcc-3.4-bib/gcc/../include \
        /exd2/billingd/src/gcc-3.4-bib/gcc/config/mips/mips.c -o mips.o
"/exd2/billingd/src/gcc-3.4-bib/gcc/config/mips/mips.c", line 628: warning(1185): 
          enumerated type mixed with another type
    { 0, 0, 0 }
         ^

"/exd2/billingd/src/gcc-3.4-bib/gcc/config/mips/mips.c", line 673: error(1020): 
          identifier "hook_bool_tree_tree_false" is undefined
  struct gcc_target targetm = TARGET_INITIALIZER;
                              ^