OSX 上 Eclipse 中的 CGAL

Question

我正在尝试在 OS X 10.7 上使用 CGAL 和 Eclipse。我通过 MacPorts 安装了 CGAL，并通过将 /opt/local/include 添加到其包含列表来让 Eclipse 意识到这一点。现在我收到链接器错误。我在这里有点迷失，你有什么建议吗？

这就是我的编译方式：

make all 
Building file: ../hit.cpp
Invoking: Cross G++ Compiler
g++ -I/opt/local/include -O0 -g3 -Wall -c -fmessage-length=0 -MMD -MP -MF"hit.d" -MT"hit.d" -o "hit.o" "../hit.cpp"
Finished building: ../hit.cpp

Building target: Hit
Invoking: Cross G++ Linker
g++  -o "Hit"  ./hit.o   
Undefined symbols for architecture x86_64:
  "CGAL::assertion_fail(char const*, char const*, int, char const*)", referenced from:
      CGAL::Interval_nt<false>::Interval_nt(double)in hit.o
      CGAL::Interval_nt<false>::Interval_nt(double, double)in hit.o
      bool CGAL::get_certain<bool>(CGAL::Uncertain<bool>)in hit.o
      CGAL::Interval_nt<false>::Test_runtime_rounding_modes::Test_runtime_rounding_modes()in hit.o
      CGAL::Interval_nt<true>::Test_runtime_rounding_modes::Test_runtime_rounding_modes()in hit.o
      CGAL::Gmpq::Gmpq(double)in hit.o
      bool CGAL::internal::seg_seg_do_intersect_crossing<CGAL::Simple_cartesian<CGAL::Interval_nt<false> > >(CGAL::Simple_cartesian<CGAL::Interval_nt<false> >::Point_2 const&, CGAL::Simple_cartesian<CGAL::Interval_nt<false> >::Point_2 const&, CGAL::Simple_cartesian<CGAL::Interval_nt<false> >::Point_2 const&, CGAL::Simple_cartesian<CGAL::Interval_nt<false> >::Point_2 const&, CGAL::Simple_cartesian<CGAL::Interval_nt<false> > const&)in hit.o
      ...
  "___gmpq_init", referenced from:
      CGAL::Gmpq_rep::Gmpq_rep()in hit.o
  "___gmpq_clear", referenced from:
      CGAL::Gmpq_rep::~Gmpq_rep()in hit.o
  "boost::detail::set_tss_data(void const*, boost::shared_ptr<boost::detail::tss_cleanup_function>, void*, bool)", referenced from:
      boost::thread_specific_ptr<CGAL::Lazy<CGAL::Segment_2<CGAL::Simple_cartesian<CGAL::Interval_nt<false> > >, CGAL::Segment_2<CGAL::Simple_cartesian<CGAL::Gmpq> >, CGAL::Gmpq, CGAL::Cartesian_converter<CGAL::Simple_cartesian<CGAL::Gmpq>, CGAL::Simple_cartesian<CGAL::Interval_nt<false> >, CGAL::NT_converter<CGAL::Gmpq, CGAL::Interval_nt<false> > > > >::~thread_specific_ptr()in hit.o
      boost::thread_specific_ptr<CGAL::Lazy<CGAL::Point_2<CGAL::Simple_cartesian<CGAL::Interval_nt<false> > >, CGAL::Point_2<CGAL::Simple_cartesian<CGAL::Gmpq> >, CGAL::Gmpq, CGAL::Cartesian_converter<CGAL::Simple_cartesian<CGAL::Gmpq>, CGAL::Simple_cartesian<CGAL::Interval_nt<false> >, CGAL::NT_converter<CGAL::Gmpq, CGAL::Interval_nt<false> > > > >::~thread_specific_ptr()in hit.o
      boost::thread_specific_ptr<CGAL::Lazy<CGAL::Segment_2<CGAL::Simple_cartesian<CGAL::Interval_nt<false> > >, CGAL::Segment_2<CGAL::Simple_cartesian<CGAL::Gmpq> >, CGAL::Gmpq, CGAL::Cartesian_converter<CGAL::Simple_cartesian<CGAL::Gmpq>, CGAL::Simple_cartesian<CGAL::Interval_nt<false> >, CGAL::NT_converter<CGAL::Gmpq, CGAL::Interval_nt<false> > > > >::reset(CGAL::Lazy<CGAL::Segment_2<CGAL::Simple_cartesian<CGAL::Interval_nt<false> > >, CGAL::Segment_2<CGAL::Simple_cartesian<CGAL::Gmpq> >, CGAL::Gmpq, CGAL::Cartesian_converter<CGAL::Simple_cartesian<CGAL::Gmpq>, CGAL::Simple_cartesian<CGAL::Interval_nt<false> >, CGAL::NT_converter<CGAL::Gmpq, CGAL::Interval_nt<false> > > >*)in hit.o
      boost::thread_specific_ptr<CGAL::Lazy<CGAL::Point_2<CGAL::Simple_cartesian<CGAL::Interval_nt<false> > >, CGAL::Point_2<CGAL::Simple_cartesian<CGAL::Gmpq> >, CGAL::Gmpq, CGAL::Cartesian_converter<CGAL::Simple_cartesian<CGAL::Gmpq>, CGAL::Simple_cartesian<CGAL::Interval_nt<false> >, CGAL::NT_converter<CGAL::Gmpq, CGAL::Interval_nt<false> > > > >::reset(CGAL::Lazy<CGAL::Point_2<CGAL::Simple_cartesian<CGAL::Interval_nt<false> > >, CGAL::Point_2<CGAL::Simple_cartesian<CGAL::Gmpq> >, CGAL::Gmpq, CGAL::Cartesian_converter<CGAL::Simple_cartesian<CGAL::Gmpq>, CGAL::Simple_cartesian<CGAL::Interval_nt<false> >, CGAL::NT_converter<CGAL::Gmpq, CGAL::Interval_nt<false> > > >*)in hit.o
  "boost::detail::get_tss_data(void const*)", referenced from:
      boost::thread_specific_ptr<CGAL::Lazy<CGAL::Segment_2<CGAL::Simple_cartesian<CGAL::Interval_nt<false> > >, CGAL::Segment_2<CGAL::Simple_cartesian<CGAL::Gmpq> >, CGAL::Gmpq, CGAL::Cartesian_converter<CGAL::Simple_cartesian<CGAL::Gmpq>, CGAL::Simple_cartesian<CGAL::Interval_nt<false> >, CGAL::NT_converter<CGAL::Gmpq, CGAL::Interval_nt<false> > > > >::get() constin hit.o
      boost::thread_specific_ptr<CGAL::Lazy<CGAL::Point_2<CGAL::Simple_cartesian<CGAL::Interval_nt<false> > >, CGAL::Point_2<CGAL::Simple_cartesian<CGAL::Gmpq> >, CGAL::Gmpq, CGAL::Cartesian_converter<CGAL::Simple_cartesian<CGAL::Gmpq>, CGAL::Simple_cartesian<CGAL::Interval_nt<false> >, CGAL::NT_converter<CGAL::Gmpq, CGAL::Interval_nt<false> > > > >::get() constin hit.o
  "CGAL::precondition_fail(char const*, char const*, int, char const*)", referenced from:
      CGAL::Handle::Handle(CGAL::Handle const&)in hit.o
      CGAL::Handle::operator=(CGAL::Handle const&)in hit.o
      CGAL::Uncertain<bool>::Uncertain(bool, bool)in hit.o
      CGAL::Uncertain<CGAL::Sign>::Uncertain(CGAL::Sign, CGAL::Sign)in hit.o
  "_mpfr_init2", referenced from:
      CGAL::Real_embeddable_traits<CGAL::Gmpq>::To_interval::operator()(CGAL::Gmpq const&) constin hit.o
  "_mpfr_set_q", referenced from:
      CGAL::Real_embeddable_traits<CGAL::Gmpq>::To_interval::operator()(CGAL::Gmpq const&) constin hit.o
  "_mpfr_get_d", referenced from:
      CGAL::Real_embeddable_traits<CGAL::Gmpq>::To_interval::operator()(CGAL::Gmpq const&) constin hit.o
  "_mpfr_clear", referenced from:
      CGAL::Real_embeddable_traits<CGAL::Gmpq>::To_interval::operator()(CGAL::Gmpq const&) constin hit.o
  "___gmpq_set_d", referenced from:
      CGAL::Gmpq::Gmpq(double)in hit.o
  "___gmpq_cmp", referenced from:
      CGAL::Gmpq::operator<(CGAL::Gmpq const&) constin hit.o
  "___gmpq_sub", referenced from:
      CGAL::Gmpq::operator-=(CGAL::Gmpq const&)in hit.o
  "___gmpq_mul", referenced from:
      CGAL::Gmpq::operator*=(CGAL::Gmpq const&)in hit.o
ld: symbol(s) not found for architecture x86_64
collect2: ld returned 1 exit status
make: *** [Hit] Error 1

Answer 1

CGAL 使用 cmake 作为构建工具，并且使用 CGAL 的程序应使用的所有编译器标志都在文件 CGALConfig.cmake 中设置。

就您而言，您至少缺少 -lCGAL -lgmp -lmpfr -lboost_thread。

另请查看 CGALConfig.cmake 文件以检查所需的 gcc 选项（例如 frounding-math）。

请注意，cmake 可以为 eclipse 生成 makefile。

Answer 2

虽然不在 Eclipse 中，但这对我有用：

$ cgal_create_CMakeLists -c Core -s out
$ cmake .
$ make

然后执行二进制文件：

$ ./out