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I compiled the library for the C++ API for TensorFlow Lite (r1.97) using the script ${TENSORFLOW_ROOT}/tensorflow/lite/tools/make/build_rpi_lib.sh following the steps suggested at this official page (Native Compiling, downloading the necessary libraries), where ${TENSORFLOW_ROOT} is the root folder where I cloned the repository.

I am trying to compile this simple test.cpp program:

#include <memory>

#include "tensorflow/lite/interpreter.h"

int main(void)
{
    std::unique_ptr<tflite::Interpreter> interpreter(new tflite::Interpreter);
}

using the command:

gcc-6 test.cpp -I${TENSORFLOW_ROOT} -I${TENSORFLOW_ROOT}/tensorflow/contrib/makefile/downloads/eigen -I${TENSORFLOW_ROOT}/tensorflow/contrib/makefile/downloads/protobuf/src -I${TENSORFLOW_ROOT}/tensorflow/contrib/makefile/downloads -L${TENSORFLOW_ROOT}/tensorflow/lite/tools/make/gen/rpi_armv7l/lib -lstdc++ -ldl -ltensorflow-lite

The list of includes was suggested in the Integrating TensorFlow libraries page (specifically from the section iOS). Compilation fails with the following error related to the inclusion of Eigen:

${TENSORFLOW_ROOT}/third_party/eigen3/unsupported/Eigen/CXX11/Tensor:1:42: fatal error: unsupported/Eigen/CXX11/Tensor: No such file or directory
 #include "unsupported/Eigen/CXX11/Tensor"

I found several links where an apparently similar problem is discussed (such as this one), but the proposed solutions involve using references to the TensorFlow python package which is something that is not possible in my case (and it feels quite patchy - I am not considering using python for this project).

I also tried using a different include path to Eigen (e.g. ${TENSORFLOW_ROOT}/third_party/eigen3):

gcc-6 test.cpp -I${TENSORFLOW_ROOT} -I${TENSORFLOW_ROOT}/third_party/eigen3 -I${TENSORFLOW_ROOT}/tensorflow/contrib/makefile/downloads/protobuf/src -I${TENSORFLOW_ROOT}/tensorflow/contrib/makefile/downloads -L${TENSORFLOW_ROOT}/tensorflow/lite/tools/make/gen/rpi_armv7l/lib -lstdc++ -ldl -ltensorflow-lite

and also this causes Eigen related compilation errors of this sort:

...
${TENSORFLOW_ROOT}/third_party/eigen3/unsupported/Eigen/CXX11/Tensor:1:42: error: #include nested too deeply
 #include "unsupported/Eigen/CXX11/Tensor"
...
${TENSORFLOW_ROOT}/third_party/eigen3/Eigen/Core:1:22: error: #include nested too deeply
 #include "Eigen/Core"
...

Any suggestions on how to solve this issue? What is the right set of include paths?

mzs
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1 Answers1

0

Turns out I was including the wrong folder. Instead of ${TENSORFLOW_ROOT}/tensorflow/contrib/makefile/downloads/eigen or ${TENSORFLOW_ROOT}/third_party/eigen3, the right one is ${TFLITE_ROOT}/tensorflow/lite/tools/make/downloads/eigen.

I am still puzzled by the number of eigen folders inside the repository:

find . -name "eigen*" -type d                                                                                                                                             
./third_party/eigen3
./tensorflow/lite/tools/make/downloads/eigen
mzs
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