clang cgal compile

Former-commit-id: 7b7a9af582d2d658231cb049d96fe8ee1882c647

build/Makefile_cgal

@@ -6,6 +6,7 @@ debug: libiglcgal
 include Makefile.conf
 all: CFLAGS += -O3 -DNDEBUG 
 debug: CFLAGS += -g -Wall -Werror
+CFLAGS += -ferror-limit=1
 
 .PHONY: libcgal
 libiglcgal: obj ../lib/libiglcgal.a

include/igl/cgal/point_mesh_squared_distance.cpp

@@ -55,6 +55,10 @@ IGL_INLINE void igl::point_mesh_squared_distance_precompute(
   assert(V.cols() == 3);
   // Must be triangles
   assert(F.cols() == 3);
+
+  // http://stackoverflow.com/questions/27748442/is-clangs-c11-support-reliable
+  T.reserve(0);
+
   // Make list of cgal triangles
   mesh_to_cgal_triangle_list(V,F,T);
   tree.clear();

include/igl/cgal/signed_distance.cpp

@@ -282,6 +282,9 @@ IGL_INLINE void igl::signed_distance_winding_number(
 }
 
 #ifdef IGL_STATIC_LIBRARY
+// This template is necessary for the others to compile with clang
+// http://stackoverflow.com/questions/27748442/is-clangs-c11-support-reliable
+template void igl::signed_distance<CGAL::Epick>( const Eigen::MatrixXd & , const Eigen::MatrixXd & , const Eigen::MatrixXi & , const, SignedDistanceType , Eigen::VectorXd & , Eigen::VectorXi &, Eigen::MatrixXd & , Eigen::MatrixXd & );
 template CGAL::Epick::FT igl::signed_distance_winding_number<CGAL::Epick>(CGAL::AABB_tree<CGAL::AABB_traits<CGAL::Epick, CGAL::AABB_triangle_primitive<CGAL::Epick, std::vector<CGAL::Triangle_3<CGAL::Epick>, std::allocator<CGAL::Triangle_3<CGAL::Epick> > >::iterator, CGAL::Boolean_tag<false> > > > const&, igl::WindingNumberAABB<Eigen::Matrix<double, 3, 1, 0, 3, 1> > const&, CGAL::Epick::Point_3 const&);
 template CGAL::Epick::FT igl::signed_distance_pseudonormal<CGAL::Epick>(CGAL::AABB_tree<CGAL::AABB_traits<CGAL::Epick, CGAL::AABB_triangle_primitive<CGAL::Epick, std::vector<CGAL::Triangle_3<CGAL::Epick>, std::allocator<CGAL::Triangle_3<CGAL::Epick> > >::iterator, CGAL::Boolean_tag<false> > > > const&, std::vector<CGAL::Triangle_3<CGAL::Epick>, std::allocator<CGAL::Triangle_3<CGAL::Epick> > > const&, Eigen::Matrix<int, -1, -1, 0, -1, -1> const&, Eigen::Matrix<double, -1, -1, 0, -1, -1> const&, Eigen::Matrix<double, -1, -1, 0, -1, -1> const&, Eigen::Matrix<double, -1, -1, 0, -1, -1> const&, Eigen::Matrix<int, -1, 1, 0, -1, 1> const&, CGAL::Epick::Point_3 const&);
 #endif