There are good reasons to prefer intltoolize to gettextize and to not use AM_GNU_GETTEXT. Unfortunately, IT_PROG_INTLTOOL is lacking just one simple check which is the reason why IT_PROG_INTLTOOL is commonly used together with AM_GLIB_GNU_GETTEXT (which provides this missing check).
With AM_GLIB_GNU_GETTEXT having become deprecated recently chances are that it will be dropped sooner or later, resulting in (overkill) AM_GNU_GETTEXT being the only alternative.
Please consider adding IT_ENABLE_NLS to intltool.m4. In doing so, you can simply replace AM_GLIB_GNU_GETTEXT (or AM_GNU_GETTEXT) by new IT_ENABLE_NLS in order to define necessary ENABLE_NLS.
There are good reasons to prefer intltoolize to gettextize and to not use AM_GNU_GETTEXT. Unfortunately, IT_PROG_INTLTOOL is lacking just one simple check which is the reason why IT_PROG_INTLTOOL is commonly used together with AM_GLIB_GNU_GETTEXT (which provides this missing check).
With AM_GLIB_GNU_GETTEXT having become deprecated recently chances are that it will be dropped sooner or later, resulting in (overkill) AM_GNU_GETTEXT being the only alternative.
Please consider adding IT_ENABLE_NLS to intltool.m4. In doing so, you can simply replace AM_GLIB_GNU_GETTEXT (or AM_GNU_GETTEXT) by new IT_ENABLE_NLS in order to define necessary ENABLE_NLS.