Switch to gmake to hopefully prevent pkg-fallout errors that have been popping
up (specifically for math/fftw3-long), although, I can't reproduce them.

Making all in FAQ
restore=: && backupdir=".am$$" && amcwd=pwd && CDPATH="${ZSH_VERSION+.}:"
&& cd . && rm -rf $backupdir && mkdir $backupdir && if (/bin/sh /wrkdirs/usr/
ports/math/fftw3-long/work/fftw-3.3.5/missing makeinfo --version) >/dev/null 2>&1;
then for f in ./fftw3.info ./fftw3.info-[0-9] ./fftw3.info-[0-9][0-9]
./fftw3.i[0-9] ./fftw3.i[0-9][0-9]; do if test -f $f; then mv $f $backupdir;
restore=mv; else :; fi; done; else :; fi && cd "$amcwd"; if /bin/sh
/wrkdirs/usr/ports/math/fftw3-long/work/fftw-3.3.5/missing makeinfo -I .
-o ./fftw3.info ./fftw3.texi; then rc=0; CDPATH="${ZSH_VERSION+.}:" && cd .;
else rc=$?; CDPATH="${ZSH_VERSION+.}:" && cd . && $restore $backupdir/*
echo "././fftw3.info" | sed 's|[^/]*$||'; fi; rm -rf $backupdir; exit $rc
/wrkdirs/usr/ports/math/fftw3-long/work/fftw-3.3.5/missing: makeinfo: not found