crosstool-ng fails on osx without zconf patch

gistfile1.txt

In file included from zconf.tab.c:234:
./zconf.hash.c:177:8: warning: implicit declaration of function 'offsetof' is invalid in
      C99 [-Wimplicit-function-declaration]
      {offsetof(struct kconf_id_strings_t, kconf_id_strings_str2),              ...
       ^
./zconf.hash.c:177:17: error: expected expression
      {offsetof(struct kconf_id_strings_t, kconf_id_strings_str2),              ...
                ^
./zconf.hash.c:178:17: error: expected expression
      {offsetof(struct kconf_id_strings_t, kconf_id_strings_str3),              ...
                ^
./zconf.hash.c:180:17: error: expected expression
      {offsetof(struct kconf_id_strings_t, kconf_id_strings_str5),              ...
                ^
./zconf.hash.c:181:17: error: expected expression
      {offsetof(struct kconf_id_strings_t, kconf_id_strings_str6),              ...
                ^
./zconf.hash.c:182:17: error: expected expression
      {offsetof(struct kconf_id_strings_t, kconf_id_strings_str7),      T_ENDMEN...
                ^
./zconf.hash.c:183:17: error: expected expression
      {offsetof(struct kconf_id_strings_t, kconf_id_strings_str8),      T_OPTION...
                ^
./zconf.hash.c:184:17: error: expected expression
      {offsetof(struct kconf_id_strings_t, kconf_id_strings_str9),      T_ENDCHO...
                ^
./zconf.hash.c:185:17: error: expected expression
      {offsetof(struct kconf_id_strings_t, kconf_id_strings_str10),             ...
                ^
./zconf.hash.c:186:17: error: expected expression
      {offsetof(struct kconf_id_strings_t, kconf_id_strings_str11),             ...
                ^
./zconf.hash.c:187:17: error: expected expression
      {offsetof(struct kconf_id_strings_t, kconf_id_strings_str12),     T_DEFAUL...
                ^
./zconf.hash.c:188:17: error: expected expression
      {offsetof(struct kconf_id_strings_t, kconf_id_strings_str13),     T_DEFAUL...
                ^
./zconf.hash.c:189:17: error: expected expression
      {offsetof(struct kconf_id_strings_t, kconf_id_strings_str14),             ...
                ^
./zconf.hash.c:191:17: error: expected expression
      {offsetof(struct kconf_id_strings_t, kconf_id_strings_str16),             ...
                ^
./zconf.hash.c:192:17: error: expected expression
      {offsetof(struct kconf_id_strings_t, kconf_id_strings_str17),     T_DEFAUL...
                ^
./zconf.hash.c:193:17: error: expected expression
      {offsetof(struct kconf_id_strings_t, kconf_id_strings_str18),             ...
                ^
./zconf.hash.c:194:17: error: expected expression
      {offsetof(struct kconf_id_strings_t, kconf_id_strings_str19),     T_OPT_DE...
                ^
./zconf.hash.c:196:17: error: expected expression
      {offsetof(struct kconf_id_strings_t, kconf_id_strings_str22),             ...
                ^
./zconf.hash.c:197:17: error: expected expression
      {offsetof(struct kconf_id_strings_t, kconf_id_strings_str23),             ...
                ^
./zconf.hash.c:199:17: error: expected expression
      {offsetof(struct kconf_id_strings_t, kconf_id_strings_str27),     T_OPT_MO...
                ^
fatal error: too many errors emitted, stopping now [-ferror-limit=]
1 warning and 20 errors generated.
make[2]: *** [zconf.tab.o] Error 1
make[1]: *** [build-lib-kconfig] Error 2
make: *** [build] Error 2