Index: trunk/psLib/configure.ac
===================================================================
--- trunk/psLib/configure.ac	(revision 6831)
+++ trunk/psLib/configure.ac	(revision 6951)
@@ -211,4 +211,5 @@
 )
 TMP_LIBS=${LIBS}
+LIBS=-lm
 AC_CHECK_LIB(fftw3f,fftwf_plan_dft_2d,[],
   [AC_MSG_ERROR([FFTW version 3 (--withfloat) library not found.  Obtain it at http://www.fftw.org/or use --with-fftw3 to specify location.])]