[mlpack-git] [mlpack/mlpack] "undefined reference" when complie "adaboost_test.cpp" (#779)

[kc420]

I have built and installed mlpack follow the tutorial:
http://mlpack.org/docs/mlpack-2.0.3/doxygen.php?doc=build.html#build
Do you mean that?



When I build the tests without modification, error message shows:


Scanning dependencies of target mlpack_test
[  1%] Building CXX object CMakeFiles/mlpack_test.dir/mlpack_test.o
[  2%] Building CXX object CMakeFiles/mlpack_test.dir/adaboost_test.o
In file included from /usr/include/c++/5/cstdint:35:0,
                 from /usr/local/include/mlpack/prereqs.hpp:30,
                 from /usr/local/include/mlpack/core.hpp:207,
                 from /home/cwind/Desktop/Downloads/tests/adaboost_test.cpp:14:
/usr/include/c++/5/bits/c++0x_warning.h:32:2: error: #error This file requires compiler and library support for the ISO C++ 2011 standard. This support must be enabled with the -std=c++11 or -std=gnu++11 compiler options.
 #error This file requires compiler and library support \
  ^
In file included from /usr/local/include/mlpack/prereqs.hpp:65:0,
                 from /usr/local/include/mlpack/core.hpp:207,
                 from /home/cwind/Desktop/Downloads/tests/adaboost_test.cpp:14:



After I add this to CMakeLists:

include(CheckCXXCompilerFlag)
CHECK_CXX_COMPILER_FLAG("-std=c++11" COMPILER_SUPPORTS_CXX11)
CHECK_CXX_COMPILER_FLAG("-std=c++0x" COMPILER_SUPPORTS_CXX0X)
if(COMPILER_SUPPORTS_CXX11)
    set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -std=c++11")
elseif(COMPILER_SUPPORTS_CXX0X)
    set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -std=c++0x")
else()
        message(STATUS "The compiler ${CMAKE_CXX_COMPILER} has no C++11 support. Please use a different C++ compiler.")
endif()

(I copied it from stackoverflow)

The error I've posted occurred after ran to 100%

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