The blank line at the end of popt/po/POTFILES.in means that
popt/po/Makefile comes out like
POTFILES = \
IRIX make complains of syntax errors (where $(POTFILES) is used) because of
the trailing slash. If the blank line at the end of POTFILES.in is removed,
all is happy.
--- rpm-4.0.2/popt/po/POTFILES.in Thu Oct 22 20:39:17 1998
+++ rpm-4.0.2/popt/po/POTFILES.in Thu Oct 22 20:39:17 1998
@@ -8,4 +8,3 @@
Fixed, in rpm-4.0.3-0.5 and later.