[Users] 'Ambiguous' g++ collisions on isnan (cmath), -std=gnu++0x

Fri Aug 3 02:44:43 CDT 2012

On 2 Aug 2012, at 22:40, Erik Schnetter wrote:

> Try now.

This causes a build failure on Datura:

	http://git.barrywardell.net/EinsteinToolkitTestResults.git/blob/c32794e5e57db36da2fede2f1eec451daf108a9c:/build.log

> /home/ianhin/Cactus/EinsteinToolkitTests/configs/EinsteinToolkitTests_bb930fc2b4a2900b3c5a780e79244bb0ddefb81d/lib/libthorn_Vectors.a(test.cc.o): In function `Vectors_Test':
> /home/ianhin/Cactus/EinsteinToolkitTests/arrangements/LSUThorns/Vectors/src/test.cc:252: undefined reference to `__builtin_isnan'
> /home/ianhin/Cactus/EinsteinToolkitTests/arrangements/LSUThorns/Vectors/src/test.cc:252: undefined reference to `__builtin_isnan'
> /home/ianhin/Cactus/EinsteinToolkitTests/arrangements/LSUThorns/Vectors/src/test.cc:251: undefined reference to `__builtin_isnan'
> /home/ianhin/Cactus/EinsteinToolkitTests/arrangements/LSUThorns/Vectors/src/test.cc:251: undefined reference to `__builtin_isnan'
> /home/ianhin/Cactus/EinsteinToolkitTests/arrangements/LSUThorns/Vectors/src/test.cc:249: undefined reference to `__builtin_isnan'
> /home/ianhin/Cactus/EinsteinToolkitTests/configs/EinsteinToolkitTests_bb930fc2b4a2900b3c5a780e79244bb0ddefb81d/lib/libthorn_Vectors.a(test.cc.o):/home/ianhin/Cactus/EinsteinToolkitTests/arrangements/LSUThorns/Vectors/src/test.cc:249: more undefined references to `__builtin_isnan' follow
> make[1]: *** [/home/ianhin/Cactus/EinsteinToolkitTests/exe/cactus_EinsteinToolkitTests_bb930fc2b4a2900b3c5a780e79244bb0ddefb81d] Error 1
> make: *** [EinsteinToolkitTests_bb930fc2b4a2900b3c5a780e79244bb0ddefb81d] Error 2
> 0.10user 0.27system 12:11.56elapsed 0%CPU (0avgtext+0avgdata 14928maxresident)k
> 0inputs+3032outputs (0major+1354minor)pagefaults 0swaps
> Build failed

> 
> -erik
> 
> On 2012-08-02, at 15:36 , Erik Schnetter <schnetter at cct.lsu.edu> wrote:
> 
>> The solution is likely to wrap the calls to isnan into a my_isnan function, similar to the way in which signbit is wrapped. I am testing a patch.
>> 
>> -erik
>> 
>> On 2012-08-02, at 15:14 , Scott Hawley <scott.hawley at belmont.edu> wrote:
>> 
>>> I added '-D__builtin_isinf=::isinf -D__builtin_isnan=::isnan' as I saw in
>>> a few simfactory .cfg files, but no luck.
>>> 
>>> (Thanks to 
>>> http://lists.einsteintoolkit.org/pipermail/users/2011-June/001151.html)
>>> 
>>> There is currently no nautilus.cfg file, but if someone would like access
>>> to Nautilus in order to make one (which is what I seem to be doing,
>>> slowly), I'd be happy to add you to my allocation! :-)
>>> 
>>> 
>>> 
>>> 
>>> 
>>> 
>>> On 8/2/12 1:58 PM, "Scott Hawley" <scott.hawley at belmont.edu> wrote:
>>> 
>>>> Hi.  The following is a well-documented collision that occurs with the
>>>> cmath header.  
>>>> 
>>>> The fixes I've seen around the 'net all involve modifying the source and
>>>> putting in #define statements. But the code in question isn't mine.
>>>> 
>>>> Is there a "-f_____" compiler flag I set instead?
>>>> 
>>>> Thanks,
>>>> Scott
>>>> 
>>>> 
>>>> 
>>>> COMPILING 
>>>> /nics/c/home/hawleys/Cactus/arrangements/LSUThorns/Vectors/src/test.cc
>>>> current_wd=`pwd` ; cd /nics/c/home/hawleys/Cactus/configs/texmex/scratch ;
>>>> g++ -LMPICH_IGNORE_CXX_SEEK -g -DCARPET_DEBUG  -fopenmp  -O2 -m64
>>>> -std=gnu++0x -g -O0 -O3 -fopenmp  -c -o $current_wd/test.cc.o
>>>> $current_wd/test.cc
>>>> -I"/nics/c/home/hawleys/Cactus/arrangements/LSUThorns/Vectors/src"
>>>> -I"/nics/c/home/hawleys/Cactus/arrangements/LSUThorns/Vectors/src/include"
>>>> -I"/nics/c/home/hawleys/Cactus/configs/texmex/config-data"
>>>> -I"/nics/c/home/hawleys/Cactus/configs/texmex/bindings/include"
>>>> -I"/nics/c/home/hawleys/Cactus/src/include"
>>>> -I"/nics/c/home/hawleys/Cactus/arrangements"
>>>> -I"/nics/c/home/hawleys/Cactus/configs/texmex/bindings/Configuration/Thorn
>>>> s
>>>> " -I"/nics/c/home/hawleys/Cactus/configs/texmex/bindings/include/Vectors"
>>>> -I"/nics/c/home/hawleys/Cactus/arrangements/LSUThorns/Vectors/src"
>>>> -I"/nics/c/home/hawleys/Cactus/arrangements/LSUThorns/Vectors/src/include"
>>>> -I"/nics/c/home/hawleys/Cactus/configs/texmex/bindings/include/Vectors"
>>>> -DCCODE
>>>> /nics/c/home/hawleys/Cactus/configs/texmex/build/Vectors/test.cc: In
>>>> function Œvoid Vectors_Test(cGH*)¹:
>>>> /nics/c/home/hawleys/Cactus/configs/texmex/build/Vectors/test.cc:112:3:
>>>> error: call of overloaded Œisnan(double&)¹ is ambiguous
>>>> /nics/c/home/hawleys/Cactus/configs/texmex/build/Vectors/test.cc:112:3:
>>>> note: candidates are:
>>>> /usr/include/bits/mathcalls.h:235:1: note: int isnan(double)
>>>> /nics/e/sw/local/nautilus/opt/gcc/4.6.3/bin/../lib/gcc/x86_64-unknown-linu
>>>> x
>>>> -gnu/4.6.3/../../../../include/c++/4.6.3/cmath:552:3: note: bool
>>>> std::isnan(long double)
>>>> /nics/e/sw/local/nautilus/opt/gcc/4.6.3/bin/../lib/gcc/x86_64-unknown-linu
>>>> x
>>>> -gnu/4.6.3/../../../../include/c++/4.6.3/cmath:548:3: note: bool
>>>> std::isnan(double)
>>>> /nics/e/sw/local/nautilus/opt/gcc/4.6.3/bin/../lib/gcc/x86_64-unknown-linu
>>>> x
>>>> -gnu/4.6.3/../../../../include/c++/4.6.3/cmath:544:3: note: bool
>>>> std::isnan(float)
>>>> /nics/c/home/hawleys/Cactus/configs/texmex/build/Vectors/test.cc:112:3:
>>>> error: call of overloaded Œisnan(double&)¹ is ambiguous
>>>> /nics/c/home/hawleys/Cactus/configs/texmex/build/Vectors/test.cc:112:3:
>>>> note: candidates are:
>>>> /usr/include/bits/mathcalls.h:235:1: note: int isnan(double)
>>>> (  ...more of the same...   )
>>>> make[3]: *** [test.cc.o] Error 1
>>>> make[3]: Leaving directory
>>>> `/nics/c/home/hawleys/Cactus/configs/texmex/build/Vectors'
>>>> make[2]: *** [make.checked] Error 2
>>>> make[2]: Leaving directory
>>>> `/nics/c/home/hawleys/Cactus/configs/texmex/build/Vectors'
>>>> make[1]: *** 
>>>> [/nics/c/home/hawleys/Cactus/configs/texmex/lib/libthorn_Vectors.a] Error
>>>> 2
>>>> make[1]: Leaving directory `/nics/c/home/hawleys/Cactus'
>>>> make: *** [texmex] Error 2
>>>> 
>>>> hawleys/Cactus> g++ --version
>>>> g++ (GCC) 4.6.3
>>>> Copyright (C) 2011 Free Software Foundation, Inc.
>>>> This is free software; see the source for copying conditions.  There is NO
>>>> warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR
>>>> PURPOSE.
>>>> 
>>>> 
>>>> 
>>>> 
>>>> 
>>>> 
>>>> 
>>>> 
>>>> 
>>>> 
>>>> 
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>>>> 
>>> 
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>> 
>> -- 
>> Erik Schnetter <eschnetter at perimeterinstitute.ca>
>> http://www.perimeterinstitute.ca/personal/eschnetter/
>> AIM: eschnett247, Skype: eschnett, Google Talk: schnetter at gmail.com
>> 
>> _______________________________________________
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> 
> -- 
> Erik Schnetter <eschnetter at perimeterinstitute.ca>
> http://www.perimeterinstitute.ca/personal/eschnetter/
> AIM: eschnett247, Skype: eschnett, Google Talk: schnetter at gmail.com
> 
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-- 
Ian Hinder
http://numrel.aei.mpg.de/people/hinder