Re: [RFC PATCH 0/3] kbuild: generate intermediate C files instead ...

Linus Torvalds writes: (Summary) With gperf 3.1 installed, I get In file included from scripts/kconfig/zconf.tab.c:213:0: scripts/kconfig/zconf.gperf:147:1: error: conflicting types for =E2=80=98kconf_id_lookup=E2=80=99
scripts/kconfig/zconf.gperf:12:31: note: previous declaration of =E2=80=98kconf_id_lookup=E2=80=99 was here
static const struct kconf_id *kconf_id_lookup(register const char *str, register unsigned int len);

                                 ^~~~~~~~~~~~~~~

because gperf now generates

   const struct kconf_id *
  -kconf_id_lookup (register const char *str, register unsigned int len)
  +kconf_id_lookup (register const char *str, register size_t len)

and I'm not sure how to detect that automatically.