I am a little hesitant to cook up a patch especially as I am not using the code. But if you wrote and tested on I could entertain applying such a patch until upstream catches. It may touch quite a few files, so some patience and dedication would be needed.
Dirk edd@rob:~/deb/gsl(master)$ ag -l delete movstat/ ## ag is silversearcher-ag movstat/qqracc.c movstat/Makefile.in movstat/snacc.c movstat/qnacc.c movstat/mvacc.c movstat/sumacc.c movstat/gsl_movstat.h movstat/TODO movstat/apply.c movstat/medacc.c movstat/funcacc.c movstat/madacc.c movstat/mmacc.c edd@rob:~/deb/gsl(master)$ -- http://dirk.eddelbuettel.com | @eddelbuettel | e...@debian.org