Macports cgal 不工作！我如何解决它？答案

【问题标题】：Macports cgal not working! How do I fix it?Macports cgal 不工作！我如何解决它？
【发布时间】：2012-02-07 19:32:06
【问题描述】：

这是我在 CGAL 主页上找到的一个基本示例。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 }

但我收到此错误：

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。有谁知道可能有什么问题这个？

【问题讨论】：

请内联发布您的代码，而不是在 pastebin 上。错误也是如此。
对不起，我不知道它支持内联代码。如果您知道如何解决，请告诉我...
可能是 macport 中用于构建 CGAL 的编译器不是用于编译您的示例的编译器。您遇到的错误是编译器不支持可变参数模板参数，而 CGAL 配置了它们。
是否可以让 macports 使用与我用于编译示例的编译器相同的编译器进行编译？

标签： c++ c macports cgal

【解决方案1】：

确实，构建 CGAL 和使用 CGAL 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时使用homebrew比使用macports更幸运。

【讨论】：