I'm having the following error when trying to build Gretl from sources:
 make -j2
"
./builddate
make -C po
build.h is current
make -C xdg
make[1]: Entering directory `/home/acer/gretl-git/po'
make[1]: Entering directory `/home/acer/gretl-git/xdg'
make[1]: Nothing to be done for `all'.
make[1]: Leaving directory `/home/acer/gretl-git/xdg'
/usr/bin/msgmerge --update bg.po gretl.pot
/usr/bin/msgmerge --update ca.po gretl.pot
............................................................................................................................................................................................................................................................................................................................................................................................................... done.
make -C lib
............................................................................................................................................................................................................................................................................................................................................................................................................... done.
/usr/bin/msgmerge --update cs.po gretl.pot
make[1]: Entering directory `/home/acer/gretl-git/lib'
make[1]: *** No rule to make target `../lib/src/asa047_mod.c', needed by `gretl_bfgs.lo'.  Stop.
make[1]: Leaving directory `/home/acer/gretl-git/lib'
........make: *** [lib] Error 2
...make: ............*** Waiting for unfinished jobs.....
............................................................................................................................................................................................................................................................................................................................................./usr/bin/msgmerge --update de.po gretl.pot
............................................. done.
/usr/bin/msgmerge --update el.po gretl.pot
................................................................................................................................................................................................................................................................................................................................................................................................................. done.
.........................................................................................................................................................................................................................................................................................................................................................................../usr/bin/msgmerge --update es.po gretl.pot
..................................................................... done.
/usr/bin/msgmerge --update eu.po gretl.pot
.................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... done.
 done.
/usr/bin/msgmerge --update fr.po gretl.pot
.................................................................................................................................................................................................................................................................................................................................................................................................................... done.
make[1]: Leaving directory `/home/acer/gretl-git/po'"
Any thoughts on what may be the problem?
Until now the builds were ok on this machine (Ubuntu 14.04), and the configure command doesn't show any errors.