use replacement if complex.h not found

use replacement if complex.h not found

diff --git a/src/fft.h b/src/fft.h
index dc1ea65..d011798 100644 (file)
--- a/src/fft.h
+++ b/src/fft.h
@@ -30,11 +30,19 @@
  * c++ projects can still use their own complex definition. */
 #include <fftw3.h>
 
+#ifdef HAVE_COMPLEX_H
 #if FFTW3F_SUPPORT
 #define FFTW_TYPE fftwf_complex
 #else
 #define FFTW_TYPE fftw_complex
 #endif
+#else
+#if FFTW3F_SUPPORT
+#define FFTW_TYPE float
+#else
+#define FFTW_TYPE double
+#endif
+#endif
 
 #ifdef __cplusplus
 extern "C" {