to sv_setsv() and sv_catpvs().
subdir = S_incpush_if_exists(aTHX_ av, subdir);
/* .../version if -d .../version */
- Perl_sv_setpvf(aTHX_ subdir, "%"SVf PERL_ARCH_FMT_PATH,
- SVfARG(libdir));
+ sv_setsv(subdir, libdir);
+ sv_catpvs(subdir, PERL_ARCH_FMT_PATH);
subdir = S_incpush_if_exists(aTHX_ av, subdir);
/* .../archname if -d .../archname */