From 66534b782c243f8a9a6c392674fa6e1706e7e822 Mon Sep 17 00:00:00 2001
From: Hauke Heibel <hauke.heibel@gmail.com>
Date: Mon, 30 Nov 2009 16:54:04 +0100
Subject: Some of our unit tests require mathematical constants and thus we
 rely on non-ansi code. It seems as if the new standard removed pow(T,int).
 M_PIL is only defined when _GNU_SOURCE is defined.

---
 unsupported/test/FFT.cpp | 4 ++++
 1 file changed, 4 insertions(+)

(limited to 'unsupported/test/FFT.cpp')

diff --git a/unsupported/test/FFT.cpp b/unsupported/test/FFT.cpp
index ad0d426e4..861677174 100644
--- a/unsupported/test/FFT.cpp
+++ b/unsupported/test/FFT.cpp
@@ -47,7 +47,11 @@ complex<long double>  promote(long double x) { return complex<long double>( x);
         cerr <<"idx\ttruth\t\tvalue\t|dif|=\n";
         for (size_t k0=0;k0<size_t(fftbuf.size());++k0) {
             complex<long double> acc = 0;
+#ifdef _GNU_SOURCE
             long double phinc = -2.*k0* M_PIl / timebuf.size();
+#else
+            long double phinc = -2.*k0* M_PI / timebuf.size();
+#endif
             for (size_t k1=0;k1<size_t(timebuf.size());++k1) {
                 acc +=  promote( timebuf[k1] ) * exp( complex<long double>(0,k1*phinc) );
             }
-- 
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