Fix build error when building --without-gui

Closes bug #59069.

diff --git a/po/automake.mk b/po/automake.mk
index 072efea3115ef5ea17529b72325786beee064336..5270deda9422d7fae3eda777fe9220470d7823e3 100644 (file)
--- a/po/automake.mk
+++ b/po/automake.mk
@@ -63,7 +63,7 @@ ALL_TRANSLATABLE_FILES = \
 $(POTFILE): $(ALL_TRANSLATABLE_FILES) Makefile
        @$(MKDIR_P) po
        $(AM_V_GEN)$(XGETTEXT) $(XGETTEXT_OPTIONS) $(TRANSLATABLE_FILES) --language=C --keyword=_ --keyword=N_ -o $@,tmp
-       $(AM_V_at)$(XGETTEXT) $(XGETTEXT_OPTIONS) -j $(UI_FILES) --language=Glade -o $@,tmp
+       test -z "$(UI_FILES)" || $(AM_V_at)$(XGETTEXT) $(XGETTEXT_OPTIONS) -j $(UI_FILES) --language=Glade -o $@,tmp
        $(AM_V_at)$(XGETTEXT) $(XGETTEXT_OPTIONS) -j src/ui/gui/org.fsf.pspp.metainfo.xml.in -o $@,tmp
        $(AM_V_at)$(XGETTEXT) $(XGETTEXT_OPTIONS) -j src/ui/gui/org.fsf.pspp.desktop.in -o $@,tmp
        $(AM_V_at)$(SED) -e '/^"POT-Creation-Date: .*/d' $@,tmp > $@