--Snipped for brevity. The following sort of escaped bash script was present several times in the build log.
I've never noticed similar outputs before, but I'm not very observant, so maybe this is normal.--

(cd .libs && rm -f libsimd.la && ln -s ../libsimd.la libsimd.la)
make[3]: Leaving directory `/tmp/SBo/fftw-3.1.2/simd'
make[2]: Leaving directory `/tmp/SBo/fftw-3.1.2/simd'
Making all in dft
make[2]: Entering directory `/tmp/SBo/fftw-3.1.2/dft'
Making all in codelets
make[3]: Entering directory `/tmp/SBo/fftw-3.1.2/dft/codelets'
Making all in standard
make[4]: Entering directory `/tmp/SBo/fftw-3.1.2/dft/codelets/standard'
(								\
	echo "#include \"ifftw.h\"";					\
	echo;								\
	for i in n1_2.c n1_3.c n1_4.c n1_5.c n1_6.c n1_7.c n1_8.c n1_9.c n1_10.c n1_11.c n1_12.c n1_13.c n1_14.c n1_15.c n1_16.c n1_32.c n1_64.c t1_2.c t1_3.c t1_4.c t1_5.c t1_6.c t1_7.c t1_8.c t1_9.c t1_10.c t1_12.c t1_15.c t1_16.c t1_32.c t1_64.c t2_4.c t2_8.c t2_16.c t2_32.c t2_64.c   q1_2.c q1_4.c q1_8.c  q1_3.c q1_5.c q1_6.c NIL; do				\
	   if test "$i" != NIL; then					\
	     j=`basename $i | sed -e 's/[.][cS]$//g'`;		\
             echo "extern void X(codelet_$j)(planner *);";	\
           fi								\
	done;								\
	echo;								\
	echo;								\
	echo "extern const solvtab X(solvtab_dft_standard);";		        \
	echo "const solvtab X(solvtab_dft_standard) = {";		        \
	for i in n1_2.c n1_3.c n1_4.c n1_5.c n1_6.c n1_7.c n1_8.c n1_9.c n1_10.c n1_11.c n1_12.c n1_13.c n1_14.c n1_15.c n1_16.c n1_32.c n1_64.c t1_2.c t1_3.c t1_4.c t1_5.c t1_6.c t1_7.c t1_8.c t1_9.c t1_10.c t1_12.c t1_15.c t1_16.c t1_32.c t1_64.c t2_4.c t2_8.c t2_16.c t2_32.c t2_64.c   q1_2.c q1_4.c q1_8.c  q1_3.c q1_5.c q1_6.c NIL; do				\
	   if test "$i" != NIL; then					\
	     j=`basename $i | sed -e 's/[.][cS]$//g'`;		\
	     echo "   SOLVTAB(X(codelet_$j)),";			\
	   fi								\
	done;								\
	echo "   SOLVTAB_END";						\
	echo "};";							\
	) >codlist.c
make  all-am
make[5]: Entering directory `/tmp/SBo/fftw-3.1.2/dft/codelets/standard'
if /bin/sh ../../../libtool --mode=compile gcc -std=gnu99 -DHAVE_CONFIG_H -I. -I. -I../../..  -I../../../kernel -I../../../dft -I../../../dft/codelets   -pthread  -MT n1_2.lo -MD -MP -MF ".deps/n1_2.Tpo" -c -o n1_2.lo n1_2.c; \