fix for clang, enabled embree build by default for python bindings

Former-commit-id: bff67a4e856f4c9da966695ceae1dfa7e817c2fd

include/igl/random_dir.cpp

@@ -1,9 +1,9 @@
 // This file is part of libigl, a simple c++ geometry processing library.
-// 
+//
 // Copyright (C) 2013 Alec Jacobson <alecjacobson@gmail.com>
-// 
-// This Source Code Form is subject to the terms of the Mozilla Public License 
-// v. 2.0. If a copy of the MPL was not distributed with this file, You can 
+//
+// This Source Code Form is subject to the terms of the Mozilla Public License
+// v. 2.0. If a copy of the MPL was not distributed with this file, You can
 // obtain one at http://mozilla.org/MPL/2.0/.
 #include "random_dir.h"
 #include <igl/PI.h>
@@ -18,14 +18,14 @@ IGL_INLINE Eigen::Vector3d igl::random_dir()
   double r = sqrt(1.0-z*z);
   double x = r * cos(t);
   double y = r * sin(t);
-  return Vector3d(x,y,z); 
+  return Vector3d(x,y,z);
 }
 
 IGL_INLINE Eigen::MatrixXd igl::random_dir_stratified(const int n)
 {
   using namespace Eigen;
   using namespace std;
-  const double m = floor(sqrt(double(n)));
+  const double m = std::floor(sqrt(double(n)));
   MatrixXd N(n,3);
   int row = 0;
   for(int i = 0;i<m;i++)

python/CMakeLists.txt

@@ -57,7 +57,7 @@ option(LIBIGL_WITH_NANOGUI          "Use Nanogui menu"   OFF)
 option(LIBIGL_WITH_CGAL             "Use CGAL"           OFF)
 option(LIBIGL_WITH_BOOLEAN          "Use Cork boolean"   OFF)
 option(LIBIGL_WITH_COMISO           "Use CoMiso"         ON)
-option(LIBIGL_WITH_EMBREE           "Use Embree"         OFF)
+option(LIBIGL_WITH_EMBREE           "Use Embree"         ON)
 option(LIBIGL_WITH_LIM              "Use LIM"            ON)
 option(LIBIGL_WITH_MATLAB           "Use Matlab"         OFF)
 option(LIBIGL_WITH_MOSEK            "Use MOSEK"          OFF)
@@ -142,10 +142,10 @@ elseif (UNIX)
   #Enable flag if undefined symbols appear on pyigl module import to get notified about the missing symbols at link time
   option(CHECK_UNDEFINED        "Check for undefined symbols"    OFF)
 
-  # Strip unnecessary sections of the binary on Linux/Mac OS 
+  # Strip unnecessary sections of the binary on Linux/Mac OS
   if(APPLE)
     set_target_properties(pyigl PROPERTIES MACOSX_RPATH ".")
-    
+
     if (NOT CHECK_UNDEFINED)
       set_target_properties(pyigl PROPERTIES LINK_FLAGS "-undefined dynamic_lookup -dead_strip")
     endif()