builddir != srcdir question

[Emanuele Giaquinta]

Hi,

When building with builddir != srcdir I have noticed that, while most
elc files are written in srcdir, the following are in builddir:

leim/quail/4Corner.elc
leim/quail/ARRAY30.elc
leim/quail/CCDOSPY.elc
leim/quail/CTLau-b5.elc
leim/quail/CTLau.elc
leim/quail/ECDICT.elc
leim/quail/ETZY.elc
leim/quail/Punct-b5.elc
leim/quail/Punct.elc
leim/quail/PY-b5.elc
leim/quail/PY.elc
leim/quail/QJ-b5.elc
leim/quail/QJ.elc
leim/quail/quick-b5.elc
leim/quail/quick-cns.elc
leim/quail/SW.elc
leim/quail/TONEPY.elc
leim/quail/tsang-b5.elc
leim/quail/tsang-cns.elc
leim/quail/ZIRANMA.elc
leim/quail/ZOZY.elc

Is it an oversight?
BTW, is there a reason for writing elc files in srcdir rather than in
builddir?

Emanuele Giaquinta