- # Use the replacement only if we have no function or macro with that name.
- if test $ac_cv_func_dirfd = no && test $gl_cv_func_dirfd_macro = no; then
- if test $ac_cv_have_decl_dirfd = yes; then
- # If the system declares dirfd already, let's declare rpl_dirfd instead.
+ # Use the replacement if we have no function or macro with that name,
+ # or if OS/2 kLIBC whose dirfd() does not work.
+ # Replace only if the system declares dirfd already.
+ case $ac_cv_func_dirfd,$gl_cv_func_dirfd_macro,$host_os,$ac_cv_have_decl_dirfd in
+ no,no,*,yes | *,*,os2*,yes)