CGAL users discussion list

["Sebastien Loriot (GeometryFactory)" <>]

I tried on 32 and 64 bits machine and it's working without assertion 
failure.

I got an AMD64 at home, I can make a try on this machine but I doubt
the problem is coming from the architecture.

S.

Sebastian Kapfer wrote:
> Hello!
>
> > You are wrong. With gcc-4.2, for example, CGAL cmake scripts adds the 
> > compilation flag -fno-strict-aliasing, because the aliasing features of that 
> > version of gcc have bugs.
>
> Okay...
>
> Please note that I have tried to compile the demo with CMake, only it
> didn't help...  GCC 4.4 doesn't help either...  probably I'm doing
> something wrong.
>
> My 387 vs. SSE conjecture wasn't the whole truth either, however.  It
> helped with the demo I posted earlier, but not with my actual code.  I
> have created a new demo (with different point data), which fails to
> work, even in 387 mode.
>
> Please get the new files from here:
>
> http://www.theorie1.physik.uni-erlangen.de/people/skapfer/points_in_new_searchtree.txt
> http://www.theorie1.physik.uni-erlangen.de/people/skapfer/distance_browsing.cpp
>
> $ g++ -fno-strict-aliasing -frounding-math -O2 -g -lCGAL \
>     distance_browsing.cpp -o distance_browsing
> $ ./distance_browsing
> terminate called after throwing an instance of
> 'CGAL::Assertion_exception'
>   what():  CGAL ERROR: assertion violation!
>   Expr: new_rd >= copy_rd
>   File:
>   
> /opt/cgal/3.7_boost1.40/include/CGAL/Orthogonal_incremental_neighbor_search.h
>   Line: 267
>
> Here with CMake:
>
> > sk@noether(~/spielwiese/fast_thicken/MinimalExample)>
> >  ll
> > total 4.3M
> > -rw-r--r--+ 1 sk mitabyter 1.4K 2010-10-20 16:47 distance_browsing.cpp
> > -rw-r--r--+ 1 sk mitabyter 3.6M 2010-10-20 15:56 points_in_new_searchtree.txt
> > -rw-r--r--+ 1 sk mitabyter 627K 2010-10-19 12:21 points_in_searchtree.txt
> > drwxr-xr-x+ 2 sk mitabyter  103 2010-10-20 14:27 TRASH/
> > sk@noether(~/spielwiese/fast_thicken/MinimalExample)> cgal_create_cmake_script 
> > created CMakeLists.txt in /home/sk/spielwiese/fast_thicken/MinimalExample ...
> > sk@noether(~/spielwiese/fast_thicken/MinimalExample)>
> >  cmake .
> > -- The C compiler identification is GNU
> > -- The CXX compiler identification is GNU
> > -- Check for working C compiler: /usr/bin/gcc
> > -- Check for working C compiler: /usr/bin/gcc -- works
> > -- Detecting C compiler ABI info
> > -- Detecting C compiler ABI info - done
> > -- Check for working CXX compiler: /usr/bin/c++
> > -- Check for working CXX compiler: /usr/bin/c++ -- works
> > -- Detecting CXX compiler ABI info
> > -- Detecting CXX compiler ABI info - done
> > -- Build type: Release
> > -- USING CXXFLAGS = ' -frounding-math -fno-strict-aliasing -O3 -DNDEBUG'
> > -- USING EXEFLAGS = ' '
> > -- Targetting Unix Makefiles
> > -- Using /usr/bin/c++ compiler.
> > -- Configuring done
> > -- Generating done
> > -- Build files have been written to: 
> > /home/sk/spielwiese/fast_thicken/MinimalExample
> > sk@noether(~/spielwiese/fast_thicken/MinimalExample)>
> >  make distance_browsing
> > Scanning dependencies of target distance_browsing
> > [100%] Building CXX object 
> > CMakeFiles/distance_browsing.dir/distance_browsing.o
> > Linking CXX executable distance_browsing
> > [100%] Built target distance_browsing
> > sk@noether(~/spielwiese/fast_thicken/MinimalExample)> ./distance_browsing 
> > sk@noether(~/spielwiese/fast_thicken/MinimalExample)>
>
> works -- release build, of course it does.
>
> now with debugging
>
> > sk@noether(~/spielwiese/fast_thicken/MinimalExample)>
> >  cmake -D CMAKE_BUILD_TYPE=Debug .
> > -- Build type: Debug
> > -- USING CXXFLAGS = ' -frounding-math -fno-strict-aliasing -g'
> > -- USING EXEFLAGS = ' '
> > -- Targetting Unix Makefiles
> > -- Using /usr/bin/c++ compiler.
> > -- Configuring done
> > -- Generating done
> > -- Build files have been written to: 
> > /home/sk/spielwiese/fast_thicken/MinimalExample
> > sk@noether(~/spielwiese/fast_thicken/MinimalExample)>
> >  make clean; make distance_browsing
> > [100%] Building CXX object 
> > CMakeFiles/distance_browsing.dir/distance_browsing.o
> > Linking CXX executable distance_browsing
> > [100%] Built target distance_browsing
> > sk@noether(~/spielwiese/fast_thicken/MinimalExample)> ./distance_browsing 
> > terminate called after throwing an instance of 'CGAL::Assertion_exception'
> >   what():  CGAL ERROR: assertion violation!
> > Expr: new_rd >= copy_rd
> > File: 
> > /opt/cgal/3.7_boost1.40/include/CGAL/Orthogonal_incremental_neighbor_search.h
> > Line: 267
> > Aborted
>
> Crashes.
>
>
> > No. CGAL is tested on different platforms, including of course 32 and 64 bits 
> > one. The error comes probably from something else. You compiled your programs 
> > without using CMake. What header <CGAL/compiler_config.h> is found when g++ is 
>
> That one:
>
> > sk@noether(~/spielwiese/fast_thicken/MinimalExample)> cat test.cpp 
> > #include <CGAL/compiler_config.h>
> > sk@noether(~/spielwiese/fast_thicken/MinimalExample)> g++ -E test.cpp 
> > # 1 "test.cpp"
> > # 1 "<built-in>"
> > # 1 "<command-line>"
> > # 1 "test.cpp"
> > # 1 "/opt/cgal/3.7_boost1.40/include/CGAL/compiler_config.h" 1 3
> > # 1 "test.cpp" 2
>
>
> > called without -I flags? Does this header correspond to the same version of 
> > CGAL as the libCGAL.so that is found by the linker without -L flags? It seems 
> > your CGAL installation is in /opt/cgal/3.7_boost1.40/. How comes that your 
> > compiler can found its headers and library without -I and -L flags?
>
> > sk@noether(~/spielwiese/fast_thicken/MinimalExample)>
> >  echo $CPLUS_INCLUDE_PATH
> > /opt/cgal/3.7_boost1.40/include:/opt/boost/1_40_0/include
>
> Similar things are in LIBRARY_PATH and LD_LIBRARY_PATH.  Am I missing 
> something?