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.

2 files changed, 6 insertions, 2 deletions

diff --git a/unsupported/Eigen/src/MatrixFunctions/MatrixExponential.h b/unsupported/Eigen/src/MatrixFunctions/MatrixExponential.h
index 636f37655..6510b6814 100644
--- a/unsupported/Eigen/src/MatrixFunctions/MatrixExponential.h
+++ b/unsupported/Eigen/src/MatrixFunctions/MatrixExponential.h
@@ -272,7 +272,7 @@ void MatrixExponential<MatrixType>::computeUV(float)
   } else {
     const float maxnorm = 3.925724783138660f;
     m_squarings = std::max(0, (int)ceil(log2(m_l1norm / maxnorm)));
-    MatrixType A = *m_M / std::pow(Scalar(2), m_squarings);
+    MatrixType A = *m_M / std::pow(Scalar(2), Scalar(m_squarings));
     pade7(A);
   }
 }
@@ -291,7 +291,7 @@ void MatrixExponential<MatrixType>::computeUV(double)
   } else {
     const double maxnorm = 5.371920351148152;
     m_squarings = std::max(0, (int)ceil(log2(m_l1norm / maxnorm)));
-    MatrixType A = *m_M / std::pow(Scalar(2), m_squarings);
+    MatrixType A = *m_M / std::pow(Scalar(2), Scalar(m_squarings));
     pade13(A);
   }
 }
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) );
             }