CGAL users discussion list

[Vero <>]

Thank you! It worked :)

On 17 June 2012 00:51, Philipp Moeller
<>
 wrote:
> Vero 
> <>
>  writes:
>
>> Hi,
>>
>> I hope you can please help me with this.
>>
>> I just compiled CGAL 3.9 in Scientific Linux, with
>> gcc (GCC) 4.4.6 20110731 (Red Hat 4.4.6-3).
>> Linux x86_64
>>
>> I compiled CGAL following this steps:
>>
>> cmake -DCMAKE_INSTALL_PREFIX=/data/.../CGAL-3.9/build
>> -DCGAL_CXX_FLAGS=-frounding-math .
>> make VERBOSE=1
>> make install
>>
>> The compilation messages indicate the use of -frounding-math during
>> the process.  (I even tried adding it to the compilation of my own
>> program)
>>
>> I have the same version in Ubuntu 10, working perfectly well with the
>> same code, but my program fails in this other machine.  When trying to
>> run any program I get:
>>
>> bash-4.1$ ./tests/CGALTest
>> terminate called after throwing an instance of 'CGAL::Assertion_exception'
>>   what():  CGAL ERROR: assertion violation!
>> Expr: -CGAL_IA_MUL(-1.1, 10.1) != CGAL_IA_MUL(1.1, 10.1)
>> File: /data/.../CGAL-3.9/build/include/CGAL/Interval_nt.h
>> Line: 159
>> Explanation: Wrong rounding: did you forget the  -frounding-math
>> option if you use GCC (or  -fp-model strict  for Intel)?
>> Aborted
>>
>> ... snip ...
>>
>> Compiled with:
>>
>> ##
>> ## CGALTest
>> ##
>> CGALTEST = CGALTest
>> $(CGALTEST)_HPP = include/massspring/Mass_Spring_Graph.hpp
>> include/massspring/Mass_Spring_mesh_face_base.hpp
>> include/massspring/Mass_Spring_vertex_base.hpp
>> $(CGALTEST) : tests/src/$(CGALTEST).cpp $($(CGALTEST)_HPP)
>>       $(CXX) $(CPPFLAGS) tests/src/$(CGALTEST).cpp -o $(CGALTEST) -Iinclude
>> $(CGALREQS)
>>       mv $(CGALTEST) tests/
>>
>> Thank you for your attention
>
> Your executable needs to be compiled with -frounding-math as well. Just
> compiling the CGAL libraries isn't enough as most of our code resides in
> headers.
>
>  $(CGALTEST) : tests/src/$(CGALTEST).cpp $($(CGALTEST)_HPP)
>        $(CXX) $(CPPFLAGS) -frounding-math tests/src/$(CGALTEST).cpp -o 
> $(CGALTEST) -Iinclude
>
> should do the trick, but you probably want to integrate this a little
> better into your build-system.
>
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-- 

Veronica E. Arriola

Room G5 Chemistry West,
School of Computer Science
University of Birmingham
http://www.cs.bham.ac.uk/~vxa855/