Run 'make SRCS' in the English document directory. Some SRCS files are

generated, like the list of mirrors used in the Handbook, and this will
make certain they exist when the PO extraction process needs them.

share/mk/doc.docbook.mk

@@ -299,18 +299,20 @@ POSET_CMD=	${SED} -i '' -e '1s,^,\#${IDSTR1}${IDSTR2}\${.newline},' \
 .if ${.TARGETS:Mpo} || ${.TARGETS:Mtran}
 
 MASTER_SRCS!=	${MAKE} -C ${EN_DIR} -V SRCS
-EN_SRCS=	${MASTER_SRCS:S,^,${EN_DIR}/,g}
 
-${DOC}.translate.xml:	${EN_SRCS}
+${DOC}.translate.xml:
 	@if [ "${TRAN_DIR}" == "${EN_DIR}" ]; then \
 		${ECHO} "build PO file in a non-English dir" ; \
 		exit 1 ; \
 	 fi
+	# some SRCS files might need to be generated, make sure they exist
+	@${MAKE} -C ${EN_DIR} ${MASTER_SRCS} > /dev/null
 	# normalize the English original into a single file
 	@${PO_XMLLINT} --nonet --noent --valid --xinclude ${MASTERDOC_EN} > ${.TARGET}.tmp
 	# remove redundant namespace attributes
 	@${PO_XMLLINT} --nsclean ${.TARGET}.tmp > ${.TARGET}
 	@${RM} ${.TARGET}.tmp
+	@${MAKE} -C ${EN_DIR} clean > /dev/null
 
 po: ${PO_LANG}.po
 .PHONY:	po