rb_external_str_new_cstr  829 include/ruby/intern.h #define rb_external_str_new_cstr(str) RB_GNUC_EXTENSION_BLOCK( \
rb_external_str_new_cstr   50 string.c       #undef rb_external_str_new_cstr
rb_external_str_new_cstr 1000 string.c       rb_external_str_new_cstr(const char *ptr)