[mlpack] cpp program using mlpack/core.hpp not getting compiled

[Nikhil Yadala]

sorry for the unnecessary chaos, there was a problem with linking of the
lib in my machine. Now its alright, no more problem in using mlpack
apparently,

thanks all.

On Mon, Feb 22, 2016 at 9:00 AM, Nikhil Yadala <nikhil.yadala at gmail.com>
wrote:

> Hi ryan,
>
>                  I have tried that too, but the compiler shows undefined
> reference to the functions that are declared in the mlpack/core.hpp. The
> following error keeps coming.
>
>        /tmp/ccagrKt9.o: In function `main':
> 1.cpp:(.text+0x2cc): undefined reference to
> `mlpack::CLI::ParseCommandLine(int, char**)'
> 1.cpp:(.text+0x2d6): undefined reference to `mlpack::Log::Debug'
> 1.cpp:(.text+0x2f2): undefined reference to `mlpack::Log::Info'
> 1.cpp:(.text+0x2f7): undefined reference to
> `mlpack::util::PrefixedOutStream::operator<<(char const*)'
> 1.cpp:(.text+0x304): undefined reference to
> `mlpack::util::PrefixedOutStream::operator<<(std::ostream&
> (*)(std::ostream&))'
> 1.cpp:(.text+0x30e): undefined reference to `mlpack::Log::Warn'
> 1.cpp:(.text+0x313): undefined reference to
> `mlpack::util::PrefixedOutStream::operator<<(char const*)'
> 1.cpp:(.text+0x320): undefined reference to
> `mlpack::util::PrefixedOutStream::operator<<(std::ostream&
> (*)(std::ostream&))'
> 1.cpp:(.text+0x32a): undefined reference to `mlpack::Log::Fatal'
> 1.cpp:(.text+0x32f): undefined reference to
> `mlpack::util::PrefixedOutStream::operator<<(char const*)'
> 1.cpp:(.text+0x33c): undefined reference to
> `mlpack::util::PrefixedOutStream::operator<<(std::ostream&
> (*)(std::ostream&))'
> 1.cpp:(.text+0x346): undefined reference to `mlpack::Log::Warn'
> 1.cpp:(.text+0x34b): undefined reference to
> `mlpack::util::PrefixedOutStream::operator<<(char const*)'
> 1.cpp:(.text+0x358): undefined reference to
> `mlpack::util::PrefixedOutStream::operator<<(std::ostream&
> (*)(std::ostream&))'
> /tmp/ccagrKt9.o: In function
> `__static_initialization_and_destruction_0(int, int)':
> 1.cpp:(.text+0xbdc): undefined reference to
> `mlpack::util::CLIDeleter::CLIDeleter()'
> 1.cpp:(.text+0xbeb): undefined reference to
> `mlpack::util::CLIDeleter::~CLIDeleter()'
> collect2: error: ld returned 1 exit status
>
>
> thanks
>
> On Mon, Feb 22, 2016 at 7:37 AM, Ryan Curtin <ryan at ratml.org> wrote:
>
>> On Sun, Feb 21, 2016 at 05:26:48PM +0530, Nikhil Yadala wrote:
>> > I am trying to run sample programs given in the tutorials page, But i
>> could
>> > not get the cpp file compiled with out errors. It seems that these are
>> the
>> > errors in the library files. could nay one guide me to get rid of this
>> and
>> > compile my first program using mlpack.
>> >
>> > the following is the error the terminal shows up!
>> >
>> > In file included from /usr/include/c++/4.8/unordered_map:35:0,
>> >                  from
>> > /usr/local/include/mlpack/core/boost_backport/unordered_map.hpp:23,
>> >                  from /usr/local/include/mlpack/prereqs.hpp:64,
>> >                  from /usr/local/include/mlpack/core.hpp:196,
>> >                  from 1.cpp:2:
>> > /usr/include/c++/4.8/bits/c++0x_warning.h:32:2: error: #error This file
>> > requires compiler and library support for the ISO C++ 2011 standard.
>> This
>> > support is currently experimental, and must be enabled with the
>> -std=c++11
>> > or -std=gnu++11 compiler options.
>>
>> Hi Nikhil,
>>
>> The answer is in your compiler's output:
>>
>> "This file requires compiler and library support for the ISO C++ 2011
>> standard.  This support is currently experimental, and must be enabled
>> with the -std=c++11 or -std=gnu++11 compiler options."
>>
>> So, add -std=c++11 to your compiler command.
>>
>> --
>> Ryan Curtin    | "What? Facts?"
>> ryan at ratml.org |   - Joe Cairo
>>
>
>
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