在Gaia支持下建立音频分析库Essentia失败

Question

我正在尝试构建Essentia (https://github.com/MTG/essentia)，这是一个音频分析库，并从源代码中在Debian 9.0中支持Gaia (https://github.com/MTG/gaia)。在此之前，它的一个依赖项，即Gaia，也是从源代码成功构建的。它安装在/usr/local/中。

当涉及到Essentia时，源代码的编译会失败，出现以下错误：

[...]
        In file included from ../src/algorithms/essentia_algorithms_reg.cpp:21:0:
    ../src/algorithms/highlevel/gaiatransform.h: At global scope:
    ../src/algorithms/highlevel/gaiatransform.h:37:10: error: ‘TransfoChain’ in namespace ‘gaia2’ does not name a type
       gaia2::TransfoChain _history;
              ^~~~~~~~~~~~
    ../src/algorithms/highlevel/gaiatransform.h: In constructor ‘essentia::standard::GaiaTransform::GaiaTransform()’:
    ../src/algorithms/highlevel/gaiatransform.h:47:5: error: ‘init’ is not a member of ‘gaia2’
         gaia2::init();
         ^~~~~
    ../src/algorithms/highlevel/gaiatransform.h:47:5: note: suggested alternative:
    In file included from ../src/essentia/algorithmfactory.h:27:0,
                     from ../src/algorithms/essentia_algorithms_reg.cpp:1:
    ../src/essentia/essentia.h:46:6: note:   ‘essentia::init’
     void init();
          ^~~~

错误所在的文件是/src/algorithms/essentia_algorithms_reg.cpp，下面是编译该文件的命令：

/usr/bin/g++ -pipe -Wall -std=c++03 -msse -msse2 -mfpmath=sse -O2 -fPIC -pthread -Isrc -I../src -Isrc/essentia -I../src/essentia -Isrc/essentia/scheduler -I../src/essentia/scheduler -Isrc/essentia/streaming -I../src/essentia/streaming -Isrc/essentia/streaming/algorithms -I../src/essentia/streaming/algorithms -Isrc/essentia/utils -I../src/essentia/utils -Isrc/3rdparty -I../src/3rdparty -Isrc/3rdparty/spline -I../src/3rdparty/spline -Isrc/3rdparty/vamp-plugin-sdk-2.4 -I../src/3rdparty/vamp-plugin-sdk-2.4 -I/usr/include/x86_64-linux-gnu -I/usr/include/taglib -I/usr/local/include -I/usr/include/qt4 -I/usr/include/qt4/QtCore -I/usr/local/include/gaia2/ -DHAVE_AVCODEC=1 -DHAVE_AVFORMAT=1 -DHAVE_AVUTIL=1 -DHAVE_AVRESAMPLE=1 -DHAVE_SAMPLERATE=1 -DHAVE_TAGLIB=1 -DHAVE_YAML=1 -DHAVE_FFTW=1 -DHAVE_GAIA2=1 -D__STDC_CONSTANT_MACROS -DPYTHONDIR="/usr/local/lib/python2.7/dist-packages" -DPYTHONARCHDIR="/usr/local/lib/python2.7/dist-packages" -DHAVE_PYEMBED=1 -DHAVE_PYEXT=1 -DHAVE_PYTHON_H=1 ../src/algorithms/essentia_algorithms_reg.cpp -c -o/home/hamidi/essentia/build/src/algorithms/essentia_algorithms_reg.cpp.1.o -fPIC -v

g++的-v选项为我提供了链接器访问的实际路径(我认为这里没有什么不好的，只是为了完整起见)：

#include "..." search starts here:
#include <...> search starts here:
 src
 ../src
 src/essentia
 ../src/essentia
 src/essentia/scheduler
 ../src/essentia/scheduler
 src/essentia/streaming
 ../src/essentia/streaming
 src/essentia/streaming/algorithms
 ../src/essentia/streaming/algorithms
 src/essentia/utils
 ../src/essentia/utils
 src/3rdparty
 ../src/3rdparty
 src/3rdparty/spline
 ../src/3rdparty/spline
 src/3rdparty/vamp-plugin-sdk-2.4
 ../src/3rdparty/vamp-plugin-sdk-2.4
 /usr/include/taglib
 /usr/include/qt4
 /usr/include/qt4/QtCore
 /usr/local/include/gaia2/
 /usr/include/c++/6
 /usr/include/x86_64-linux-gnu/c++/6
 /usr/include/c++/6/backward
 /usr/lib/gcc/x86_64-linux-gnu/6/include
 /usr/local/include
 /usr/lib/gcc/x86_64-linux-gnu/6/include-fixed
 /usr/include/x86_64-linux-gnu
 /usr/include
End of search list.

下面是与错误相关的文件(github )：

• MTG/gaia/blob/master/src/gaia.h
• MTG/gaia/blob/master/src/transformation.h#L106
• /MTG/essentia/blob/master/src/algorithms/highlevel/gaiatransform.h

Answer 1

最终导致问题的是配置Gaia时发生的错误。实际上，与其仅使用以下选项进行配置，不如使用以下选项：

./waf configure --with-python-bindings --with-asserts --with-cyclops

--with-stlfacade选项是由于疏忽而添加的。当将Gaia与Essentia结合使用时，此选项不兼容。