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POMacports cgal not working! How do I fix it?
 

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  1. POMacports cgal not working! How do I fix it?
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    <p>This is a basic example that I found on the CGAL main webpage. I am trying to compile the following: </p> <pre><code> 1 #include &lt;iostream&gt; 2 #include &lt;CGAL/Exact_predicates_inexact_constructions_kernel.h&gt; 3 #include &lt;CGAL/convex_hull_2.h&gt; 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 &lt;&lt; ptr - result &lt;&lt; " points on the convex hull" &lt;&lt; std::endl; 15 return 0; 16 } </code></pre> <p>but I get this error: </p> <pre><code>Demo $&gt; 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 ‘&gt;’ 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 ‘&amp;’ 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&amp;, 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 </code></pre> <p>I installed cgal using macports. Does anyone know what could be wrong with this?</p>
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      1. POMacports cgal not working! How do I fix it?
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    1. COPlease post your code inline instead of on pastebin. The same goes for errors.
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      1. POMacports cgal not working! How do I fix it?
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    2. COSorry I didn't know it supported inline code. Let me know if you know how to fix it...
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    3. COIt may be that the compiler used in macport to build CGAL is not the one used to compile your example. The error you have is that variadic template parameters are not supported by your compiler while CGAL was configured with them.
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