Squashed 'third_party/eigen/' changes from 61d72f6..cf794d3


Change-Id: I9b814151b01f49af6337a8605d0c42a3a1ed4c72
git-subtree-dir: third_party/eigen
git-subtree-split: cf794d3b741a6278df169e58461f8529f43bce5d
diff --git a/blas/xerbla.cpp b/blas/xerbla.cpp
index dd39a52..c373e86 100644
--- a/blas/xerbla.cpp
+++ b/blas/xerbla.cpp
@@ -1,5 +1,5 @@
 
-#include <iostream>
+#include <stdio.h>
 
 #if (defined __GNUC__) && (!defined __MINGW32__) && (!defined __CYGWIN__)
 #define EIGEN_WEAK_LINKING __attribute__ ((weak))
@@ -14,7 +14,7 @@
 
 EIGEN_WEAK_LINKING int xerbla_(const char * msg, int *info, int)
 {
-  std::cerr << "Eigen BLAS ERROR #" << *info << ": " << msg << "\n";
+  printf("Eigen BLAS ERROR #%i: %s\n", *info, msg );
   return 0;
 }