diff -rupN libs/libCore.orig/FFT.cpp libs/libCore/FFT.cpp
--- libs/libCore.orig/FFT.cpp	2011-11-27 01:27:43.856779929 +0100
+++ libs/libCore/FFT.cpp	2012-01-30 00:14:18.682460150 +0100
@@ -104,6 +104,7 @@ public:
 #endif
 
 
+#if HAVE_FFTWF
 class OpVecFFT {
   WrapFFTWF fft_float;
   WrapFFTW  fft_double;
@@ -169,7 +170,9 @@ public:
     }
   }  
 };
+#endif
 
+#if HAVE_FFTWF
 class OpVecIFFT {
   WrapFFTWF fft_float;
   WrapFFTW fft_double;
@@ -228,6 +231,7 @@ public:
     }
   }
 };
+#endif
 
 //!
 //@Module FFT (Inverse) Fast Fourier Transform Function
@@ -350,6 +354,8 @@ public:
 //inputs x len dim
 //outputs y
 //!
+
+#if HAVE_FFTWF
 ArrayVector FFTFunction(int nargout, const ArrayVector& arg) {
   // Get the data argument
   if (arg.size() < 1)
@@ -384,7 +390,9 @@ ArrayVector FFTFunction(int nargout, con
   OpVecFFT op(FFTLength);
   return ArrayVector(VectorOpDynamic<OpVecFFT>(arg0,FFTLength,FFTDim,op));
 }
+#endif
 
+#if HAVE_FFTWF
 ArrayVector IFFTFunction(int nargout, const ArrayVector& arg) {
   // Get the data argument
   if (arg.size() < 1)
@@ -419,3 +427,4 @@ ArrayVector IFFTFunction(int nargout, co
   OpVecIFFT op(FFTLength);
   return ArrayVector(VectorOpDynamic<OpVecIFFT>(arg0,FFTLength,FFTDim,op));
 }
+#endif
diff -rupN libs/libCore.orig/Loader.cpp libs/libCore/Loader.cpp
--- libs/libCore.orig/Loader.cpp	2012-01-30 00:08:41.463155562 +0100
+++ libs/libCore/Loader.cpp	2012-01-30 00:12:24.422448304 +0100
@@ -43,8 +43,10 @@ ArrayVector FeofFunction(int, const Arra
 ArrayVector FseekFunction(int, const ArrayVector&);
 ArrayVector FgetlineFunction(int, const ArrayVector&);
 ArrayVector FscanfFunction(int, const ArrayVector&);
+#ifdef HAVE_FFTW
 ArrayVector FFTFunction(int, const ArrayVector&);
 ArrayVector IFFTFunction(int, const ArrayVector&);
+#endif
 ArrayVector StrCmpFunction(int, const ArrayVector&);
 ArrayVector StrCmpiFunction(int, const ArrayVector&);
 ArrayVector StrnCmpFunction(int, const ArrayVector&);
@@ -286,8 +288,10 @@ void LoadBuiltinFunctionsCore(Context *c
   context->addFunction("fseek",FseekFunction,0,3,0,"handle","offset","style",NULL);
   context->addFunction("fgetline",FgetlineFunction,0,1,1,"handle",NULL);
   context->addFunction("fscanf",FscanfFunction,0,-1,-1,NULL);
+#ifdef HAVE_FFTW
   context->addFunction("fft",FFTFunction,0,3,1,"x","len","dim",NULL);
   context->addFunction("ifft",IFFTFunction,0,3,1,"x","len","dim",NULL);
+#endif
   context->addFunction("strcmp",StrCmpFunction,0,2,1,"string1","string2",NULL);
   context->addFunction("strcmpi",StrCmpiFunction,0,2,1,"string1","string2",NULL);
   context->addFunction("strncmp",StrnCmpFunction,0,3,1,"string1","string2","len",NULL);