| dnl -------------------------------------------------------------------------- |
| dnl PA_LANG_SEEN_LIST(subset) |
| dnl |
| dnl List of the language lang has been used in the configuration |
| dnl script so far, possibly subset by [subset]. |
| dnl |
| dnl This relies on overriding _AC_LANG_SET(from, to), |
| dnl the internal implementation of _AC_LANG. |
| dnl -------------------------------------------------------------------------- |
| m4_ifndef([_PA_LANG_SET], |
| [m4_rename([_AC_LANG_SET], [_PA_LANG_SET])dnl |
| m4_defun([_AC_LANG_SET], [m4_set_add([_PA_LANG_SEEN_SET],[$2])dnl |
| _PA_LANG_SET($@)])]) |
| |
| AC_DEFUN([PA_LANG_SEEN_LIST], |
| [m4_set_delete([_pa_lang_seen_subset])dnl |
| m4_pushdef([_pa_lang_seen_subset_list],m4_ifnblank([$1],[$1],m4_dquote(m4_set_list([_PA_LANG_SEEN_SET]))))dnl |
| m4_set_add_all([_pa_lang_seen_subset],_pa_lang_seen_subset_list)dnl |
| m4_cdr(m4_set_intersection([_pa_lang_seen_subset],[_PA_LANG_SEEN_SET]))dnl |
| m4_popdef([_pa_lang_seen_subset_list])]) |
