CGAL users discussion list

[Dror Atariah <>]

First, in 4.2 there are two variants (with or without a value of DCGAL_DIR 
given). Which one is the right one?

I did not try anything without CGAL. How should I check my cmake installation?

Let me remind that "cmake -GXcode ." worked for the example "Voronoi_diag_2". 
Is it a sign that "cmake" is properly installed?


On Jan 3, 2011, at 15:16 PM, Sebastien Loriot (GeometryFactory) wrote:

> 4th attempt 2) was the correct one.
> 
> It seems that your cmake is not correctly install/configured.
> Have you tried a simple example without CGAL to see if the
> problem comes from your cmake installation?
> 
> S.
> 
> 
> 
> 
> Dror Atariah wrote:
>> I am new to CGAL and having problems setting up basic programs. First I'll
>> try to describe my system setting. I'm using mac os X (10.6.5). As far as I
>> know, the compiler I have is g++.
>> I managed to run the example Voronoi_diag_2. For that I first ran  cmake
>> -GXcode . in the project's directory, and then I was able to run it from
>> XCode.
>> Next, I tried to compile and run the following example (taken from the
>> manual):
>> #include <iostream> #include 
>> <CGAL/Exact_predicates_inexact_constructions_kernel.h>
>> #include <CGAL/convex_hull_2.h>
>> typedef CGAL::Exact_predicates_inexact_constructions_kernel K; typedef 
>> K::Point_2 Point_2;
>> int main() {
>>      Point_2 points[5] = { Point_2(0,0), Point_2(10,0), Point_2(10,10),
>> Point_2(6,5), Point_2(4,1) };
>>      Point_2 result[5];
>>      Point_2 *ptr = CGAL::convex_hull_2( points, points+5, result );       
>>           std::cout
>> << ptr - result << " points on the convex hull" <<
>>      std::endl; return 0;
>> }
>> Here I tried the following options, neither produced the desired results.
>> 1st attempt:
>> This is the most naive approach, which I was expecting not to work:
>> g++ array_convex_hull_2.cpp
>> The output was:
>> array_convex_hull_2.cpp:2:64: error:
>> CGAL/Exact_predicates_inexact_constructions_kernel.h: No such file or
>> directory
>> array_convex_hull_2.cpp:3:32: error: CGAL/convex_hull_2.h: No such file or
>> directory
>> array_convex_hull_2.cpp:4: error: ‘CGAL’ has not been declared
>> array_convex_hull_2.cpp:4: error: expected initializer before ‘K’
>> array_convex_hull_2.cpp:5: error: ‘K’ has not been declared
>> array_convex_hull_2.cpp:5: error: expected initializer before ‘Point_2’
>> array_convex_hull_2.cpp: In function ‘int main()’:
>> array_convex_hull_2.cpp:7: error: ‘Point_2’ was not declared in this scope
>> array_convex_hull_2.cpp:7: error: expected `;' before ‘points’
>> array_convex_hull_2.cpp:8: error: expected `;' before ‘result’
>> array_convex_hull_2.cpp:9: error: ‘ptr’ was not declared in this scope
>> array_convex_hull_2.cpp:9: error: ‘CGAL’ has not been declared
>> array_convex_hull_2.cpp:9: error: ‘points’ was not declared in this scope
>> array_convex_hull_2.cpp:9: error: ‘result’ was not declared in this scope
>> 2nd attempt:
>> In the terminal I ran in the directory where the file was:
>> cmake .
>> The output was:
>> CMake Error: The source directory
>> "/Users/drorata/Documents/academics/programing/CGAL/examples and
>> tests/testProject" does not appear to contain CMakeLists.txt.
>> Specify --help for usage, or press the help button on the CMake GUI.
>> 3rd attempt:
>> Again, in the directory where the source is, I ran:
>> cmake -DCGAL_DIR=/opt/local/lib/CGAL/CGALConfig.cmake .
>> Here the output was again:
>> CMake Error: The source directory
>> "/Users/drorata/Documents/academics/programing/CGAL/examples and
>> tests/testProject" does not appear to contain CMakeLists.txt.
>> Specify --help for usage, or press the help button on the CMake GUI.
>> 4th attempt:
>> I ran the script cgal_create_cmake_script, producing the output: created 
>> CMakeLists.txt in
>> /Users/drorata/Documents/academics/programing/CGAL/examples and
>> tests/testProject ...
>> Then I did one of the following:
>> 1) Simply make. This returned make: *** No targets specified and no 
>> makefile found.  Stop.
>> 2) Then I ran either cmake . or cmake
>> -DCGAL_DIR=/opt/local/lib/CGAL/CGALConfig.cmake ., In both cases the output
>> was:
>> CMake Error: Error required internal CMake variable not set, cmake may be
>> not be built correctly.
>> Missing variable is:
>> CMAKE_and_COMPILER_ENV_VAR
>> CMake Error: Error required internal CMake variable not set, cmake may be
>> not be built correctly.
>> Missing variable is:
>> CMAKE_and_COMPILER
>> CMake Error: Could not find cmake module
>> file:/Users/drorata/Documents/academics/programing/CGAL/examples and
>> tests/testProject/CMakeFiles/CMakeandCompiler.cmake
>> CMake Error: Error required internal CMake variable not set, cmake may be
>> not be built correctly.
>> Missing variable is:
>> CMAKE_testProject_example_COMPILER_ENV_VAR
>> CMake Error: Error required internal CMake variable not set, cmake may be
>> not be built correctly.
>> Missing variable is:
>> CMAKE_testProject_example_COMPILER
>> CMake Error: Could not find cmake module
>> file:/Users/drorata/Documents/academics/programing/CGAL/examples and
>> tests/testProject/CMakeFiles/CMaketestProject_exampleCompiler.cmake
>> CMake Error: Could not find cmake module file:CMakeandInformation.cmake
>> CMake Error: Could not find cmake module
>> file:CMaketestProject_exampleInformation.cmake
>> CMake Error: CMAKE_and_COMPILER not set, after EnableLanguage
>> CMake Error: CMAKE_testProject_example_COMPILER not set, after
>> EnableLanguage
>> -- Build type: Release
>> -- USING CXXFLAGS = '-pipe -O2 -arch x86_64  -frounding-math
>> -fno-strict-aliasing -O3 -DNDEBUG'
>> -- USING EXEFLAGS = '-L/opt/local/lib -arch x86_64
>> -Wl,-dylib_file,/System/Library/Frameworks/OpenGL.framework/Versions/A/Libraries/libGL.dylib:/System/Library/Frameworks/OpenGL.framework/Versions/A/Libraries/libGL.dylib
>> '
>> -- Targetting Unix Makefiles
>> -- Using  compiler.
>> -- DARWIN_VERSION=10
>> -- Mac Leopard detected
>> -- Configuring incomplete, errors occurred!
>> Maybe I should add that, I installed CGAL using macports.
>> I tried to consult the manual, but I couldn't figure out what should I do.
>> Can someone help me with the first initialization of a small project?
>> Actually, any help would be appreciated!
>> Thanks in advance,
>> Dror
> 
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Dror Atariah
Freie Universität Berlin
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