Question

这是我在CGAL主网页上找到的基本示例。我正在尝试编译以下内容：

  1 #include <iostream>                                                             
  2 #include <CGAL/Exact_predicates_inexact_constructions_kernel.h>                 
  3 #include <CGAL/convex_hull_2.h>                                                 
  4                                                                                 
  5 typedef CGAL::Exact_predicates_inexact_constructions_kernel K;                  
  6 typedef K::Point_2 Point_2;                                                     
  7                                                                                 
  8 int main()                                                                      
  9 {                                                                               
 10   Point_2 points[5] = { Point_2(0,0), Point_2(10,0), Point_2(10,10), Point_2(6,5), Point_2(4,1) };
 11   Point_2 result[5];                                                            
 12                                                                                 
 13   Point_2 *ptr = CGAL::convex_hull_2( points, points+5, result );               
 14   std::cout <<  ptr - result << " points on the convex hull" << std::endl;      
 15   return 0;                                                                     
 16 }

但是我收到了这个错误：

Demo $> make
[100%] Building CXX object CMakeFiles/helloworld_cgal.dir/helloworld_cgal.cpp.o
In file included from /opt/local/include/CGAL/Bbox_2.h:30,
                 from /opt/local/include/CGAL/basic_classes.h:30,
                 from /opt/local/include/CGAL/Cartesian/Cartesian_base.h:28,
                 from /opt/local/include/CGAL/Simple_cartesian.h:27,
                 from /opt/local/include/CGAL/Exact_predicates_inexact_constructions_kernel.h:27,
                 from /Users/carlos/Documents/Code/Demo/helloworld_cgal.cpp:2:
/opt/local/include/CGAL/array.h:81: error: expected nested-name-specifier before ‘...’ token
/opt/local/include/CGAL/array.h:81: error: expected ‘>’ before ‘...’ token
/opt/local/include/CGAL/array.h:83: error: template argument 2 is invalid
/opt/local/include/CGAL/array.h:84: error: expected ‘,’ or ‘...’ before ‘&’ token
/opt/local/include/CGAL/array.h:84: error: ISO C++ forbids declaration of ‘Args’ with no type
/opt/local/include/CGAL/array.h: In function ‘int CGAL::make_array(const T&, int)’:
/opt/local/include/CGAL/array.h:86: error: template argument 2 is invalid
/opt/local/include/CGAL/array.h:86: error: invalid type in declaration before ‘=’ token
/opt/local/include/CGAL/array.h:86: error: ‘args’ was not declared in this scope
/opt/local/include/CGAL/array.h:86: error: expected `}' before ‘...’ token
/opt/local/include/CGAL/array.h:86: error: expected `}' before ‘...’ token
/opt/local/include/CGAL/array.h:86: error: expected ‘,’ or ‘;’ before ‘...’ token
/opt/local/include/CGAL/array.h: At global scope:
/opt/local/include/CGAL/array.h:87: error: expected unqualified-id before ‘return’
/opt/local/include/CGAL/array.h:88: error: expected declaration before ‘}’ token
make[2]: *** [CMakeFiles/helloworld_cgal.dir/helloworld_cgal.cpp.o] Error 1
make[1]: *** [CMakeFiles/helloworld_cgal.dir/all] Error 2
make: *** [all] Error 2

我使用macports安装了cgal。有谁知道什么可能是错的此？

Answer 1

实际上，在构建CGAL和使用CGAL进行编译时，使用的编译器或编译器选项之间似乎不匹配。可能是macports没有帮助，我在安装CGAL时比使用homebrew更幸运。

Macports cgal无法正常工作！我如何解决它？

1 个答案: