[mlpack-git] [mlpack] Compiling on Archlinux (#574)

[Daniel Clarke]

I had the following error while compiling:

    In file included from src/mlpack/core/util/backtrace.cpp:22:0:
    /usr/include/bfd.h:35:2: error: #error config.h must be included before this header
     #error config.h must be included before this header
      ^
    src/mlpack/CMakeFiles/mlpack.dir/build.make:398: recipe for target 'src/mlpack/CMakeFiles/mlpack.dir/core/util/backtrace.cpp.o' failed
    make[2]: *** [src/mlpack/CMakeFiles/mlpack.dir/core/util/backtrace.cpp.o] Error 1
    make[2]: *** Waiting for unfinished jobs....
    CMakeFiles/Makefile2:206: recipe for target 'src/mlpack/CMakeFiles/mlpack.dir/all' failed
    make[1]: *** [src/mlpack/CMakeFiles/mlpack.dir/all] Error 2
    Makefile:127: recipe for target 'all' failed
    make: *** [all] Error 2

I fixed it by adding to CMakeLists:

    add_definitions(-DPACKAGE)
    add_definitions(-DPACKAGE_VERSION)

This will probably happen to everyone with a new enough binutils; fix from https://bbs.archlinux.org/viewtopic.php?pid=1430683#p1430683

This could probably be fixed harmlessly by populating those defines with mlpack's info.

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