[CppAD] Compilation issue on OSX

Sat Oct 12 16:39:24 EDT 2013

I think that the following change to
      trunk/test_more/rev_sparse_hes.cpp
has fixed the problem:
     https://projects.coin-or.org/CppAD/changeset/2935#file3

On 10/11/2013 2:07 PM, Norman Goldstein wrote:
> Hi, Dominique.  I have a hunch, but cannot take it too far, as I do not
> have gcc 4.8, nor a sufficiently recent version of CPPAD to have
> "case_six" (mine stops at 5).  The fact that
>
> std::vector<bool>::reference {aka std::_Bit_reference}
>
> suggests that gcc 4.8 is space-optimizing vectors of bool to be bit 
> arrays,
> and the operator |= has not been defined for bit arrays.
> I checked my gcc 4.7, and the allocator<> template does not seem to
> be overridden to be optimized for bool, so it looks like gcc 4.7 is not
> packing things in like it seems in gcc 4.8.
>
> Perhaps, there is some header file that contains this operator,
> and it can be included manually, as a work-around.  Or, there may be
> a compiler flag to not pack vector<bool>.
>
> Sorry.  Maybe some one else can confirm or go further with this.
>
>
>
> On 10/11/2013 11:33 AM, Dominique Orban wrote:
>> I'm configuring CppAD 20130927 on OSX 10.8.4 (Xcode 4.6.3) with the 
>> following setup
>>
>> CC=gcc-4.8 CXX=g++-4.8 cmake .. 
>> -Dcmake_install_prefix=/tmp/cppad_install -Dcppad_testvector=std
>>
>> gcc-4.8 and g++-4.8 were installed via Homebrew.
>>
>> The configure step goes smoothly but `make check` fails with the 
>> following message:
>>
>> -- 
>> [ 93%] Building CXX object 
>> test_more/CMakeFiles/test_more.dir/rev_sparse_hes.cpp.o
>> /tmp/cppad-20130927/test_more/rev_sparse_hes.cpp: In function 'bool 
>> {anonymous}::case_six()':
>> /tmp/cppad-20130927/test_more/rev_sparse_hes.cpp:496:22: error: no 
>> match for 'operator|=' (operand types are 
>> 'std::vector<bool>::reference {aka std::_Bit_reference}' and 'bool')
>>      Check[i * n + j] |= F2[i * n + k] & r[ k * n + j];
>>                       ^
>> /tmp/cppad-20130927/test_more/rev_sparse_hes.cpp:496:22: note: 
>> candidates are:
>> In file included from 
>> /usr/local/Cellar/gcc48/4.8.1/gcc/include/c++/4.8.1/ios:42:0,
>>                  from 
>> /usr/local/Cellar/gcc48/4.8.1/gcc/include/c++/4.8.1/ostream:38,
>>                  from 
>> /usr/local/Cellar/gcc48/4.8.1/gcc/include/c++/4.8.1/iostream:39,
>>                  from /tmp/cppad-20130927/cppad/error_handler.hpp:131,
>>                  from /tmp/cppad-20130927/cppad/base_require.hpp:146,
>>                  from /tmp/cppad-20130927/cppad/cppad.hpp:24,
>>                  from 
>> /tmp/cppad-20130927/test_more/rev_sparse_hes.cpp:14:
>> /usr/local/Cellar/gcc48/4.8.1/gcc/include/c++/4.8.1/bits/ios_base.h:169:3: 
>> note: const std::_Ios_Iostate& std::operator|=(std::_Ios_Iostate&, 
>> std::_Ios_Iostate)
>>    operator|=(_Ios_Iostate& __a, _Ios_Iostate __b)
>>    ^
>> /usr/local/Cellar/gcc48/4.8.1/gcc/include/c++/4.8.1/bits/ios_base.h:169:3: 
>> note:   no known conversion for argument 1 from 
>> 'std::vector<bool>::reference {aka std::_Bit_reference}' to 
>> 'std::_Ios_Iostate&'
>> /usr/local/Cellar/gcc48/4.8.1/gcc/include/c++/4.8.1/bits/ios_base.h:131:3: 
>> note: const std::_Ios_Openmode& std::operator|=(std::_Ios_Openmode&, 
>> std::_Ios_Openmode)
>>    operator|=(_Ios_Openmode& __a, _Ios_Openmode __b)
>>    ^
>> /usr/local/Cellar/gcc48/4.8.1/gcc/include/c++/4.8.1/bits/ios_base.h:131:3: 
>> note:   no known conversion for argument 1 from 
>> 'std::vector<bool>::reference {aka std::_Bit_reference}' to 
>> 'std::_Ios_Openmode&'
>> /usr/local/Cellar/gcc48/4.8.1/gcc/include/c++/4.8.1/bits/ios_base.h:91:3: 
>> note: const std::_Ios_Fmtflags& std::operator|=(std::_Ios_Fmtflags&, 
>> std::_Ios_Fmtflags)
>>    operator|=(_Ios_Fmtflags& __a, _Ios_Fmtflags __b)
>>    ^
>> /usr/local/Cellar/gcc48/4.8.1/gcc/include/c++/4.8.1/bits/ios_base.h:91:3: 
>> note:   no known conversion for argument 1 from 
>> 'std::vector<bool>::reference {aka std::_Bit_reference}' to 
>> 'std::_Ios_Fmtflags&'
>> make[3]: *** 
>> [test_more/CMakeFiles/test_more.dir/rev_sparse_hes.cpp.o] Error 1
>> make[2]: *** [test_more/CMakeFiles/test_more.dir/all] Error 2
>> make[1]: *** [CMakeFiles/check.dir/rule] Error 2
>> make: *** [check] Error 2
>> -- 
>>
>> This error does not occur if I use either the boost, eigen of cppad 
>> test vector options. According to Brad Bell, the error does not occur 
>> on Linux with gcc-4.8. It might be OSX specific. My C++ is 
>> nonexistent, so I don't understand the error message.
>>
>> Other things I've tried:
>>
>> - change the version of gcc: all lead to the same error
>> - use clang / clang++ instead of gcc / g++: same error
>> - add CXXFLAGS='-std=c++11' or CXXFLAGS='-std=c++11 -stdlib=libc++': 
>> same error.
>>
>> My goal is to submit a Homebrew [1] formula for CppAD to the 
>> Homebrew/Science tap [2]. My current formula is available from [3]. 
>> Any feedback would be greatly appreciated.
>>
>> Thanks!
>>
>> Dominique
>>
>>
>> [1] http://brew.sh
>> [2] https://github.com/Homebrew/homebrew-science
>> [3] https://gist.github.com/6938726
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>>
>
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