Index: /trunk/psLib/configure.ac
===================================================================
--- /trunk/psLib/configure.ac	(revision 6951)
+++ /trunk/psLib/configure.ac	(revision 6952)
@@ -210,8 +210,6 @@
   [AC_MSG_ERROR([FFTW version 3 (--withfloat) headers not found.  Obtain it at http://www.fftw.org/or use --with-fftw3 to specify location.])]
 )
-TMP_LIBS=${LIBS}
-LIBS=-lm
 AC_CHECK_LIB(fftw3f,fftwf_plan_dft_2d,[],
-  [AC_MSG_ERROR([FFTW version 3 (--withfloat) library not found.  Obtain it at http://www.fftw.org/or use --with-fftw3 to specify location.])]
+  [AC_MSG_ERROR([FFTW version 3 (--withfloat) library not found.  Obtain it at http://www.fftw.org/or use --with-fftw3 to specify location.])],[-lm]
 )
 LIBS=${TMP_LIBS}