Compile OpenCV code with -mmic flags

[Maurizio_I_]

Hi, i need to compile my opencv code for mic coprocessor. 
I'm working on a Xeon machine hosted by University of Pisa which hosts Phi Co-Processor.
Because i'm not a super user in that machine, i compile OpenCV and FastFlow libraries in my home and setted environmental variables like LD_LIBRARY_PATH and PKG_CONFIG_PATH.

I compile my code with 

icc -mmic -Wall -std=c++11  -DNO_DEFAULT_MAPPING -I /home/spm1407/lib/opencv-3.1.0/include/  
-I /home/spm1501/fastflow/ -O3  -o farm farm.cpp -pthread -L/home/spm1407/lib/opencv-3.1.0/lib 
-lopencv_core -lopencv_highgui -lopencv_imgcodecs -lopencv_videoio  -lopencv_video -lopencv_imgproc -lpthread 

When I compile without -mmic flag, compiler works fine. But if I compile with that flag, compiler returns
 

x86_64-k1om-linux-ld: skipping incompatible /home/spm1407/lib/opencv-3.1.0/lib/libopencv_core.so when searching for -lopencv_core
x86_64-k1om-linux-ld: cannot find -lopencv_core
x86_64-k1om-linux-ld: skipping incompatible /home/spm1407/lib/opencv-3.1.0/lib/libopencv_highgui.so when searching for -lopencv_highgui
x86_64-k1om-linux-ld: cannot find -lopencv_highgui
x86_64-k1om-linux-ld: skipping incompatible /home/spm1407/lib/opencv-3.1.0/lib/libopencv_imgcodecs.so when searching for -lopencv_imgcodecs
x86_64-k1om-linux-ld: cannot find -lopencv_imgcodecs
x86_64-k1om-linux-ld: skipping incompatible /home/spm1407/lib/opencv-3.1.0/lib/libopencv_videoio.so when searching for -lopencv_videoio
x86_64-k1om-linux-ld: cannot find -lopencv_videoio
x86_64-k1om-linux-ld: skipping incompatible /home/spm1407/lib/opencv-3.1.0/lib/libopencv_video.so when searching for -lopencv_video
x86_64-k1om-linux-ld: cannot find -lopencv_video
x86_64-k1om-linux-ld: skipping incompatible /home/spm1407/lib/opencv-3.1.0/lib/libopencv_imgproc.so when searching for -lopencv_imgproc
x86_64-k1om-linux-ld: cannot find -lopencv_imgproc

I tried to resolve recompiling OpenCV with this guide https://software.intel.com/en-us/articles/cross-compilation-for-intel-xeon-phi-coprocessor-with-cmake :
 

export CC=icc
export CXX=icpc
export FC=ifort
export CFLAGS="-mmic"
export CXXFLAGS=$CFLAGS
export FFLAGS=$CFLAGS
export MPI_C=mpiicc
export MPI_CXX=mpiicpc

cd opencv
mkdir release && cd release
cmake -D CMAKE_BUILD_TYPE=RELEASE -D CMAKE_INSTALL_PREFIX=$HOME/lib/opencv-3.1.0 -D WITH_GTK=ON 
-DCMAKE_C_COMPILER=icc -DCMAKE_CXX_COMPILER=icpc -DWITH_CUDA=OFF 
-DCMAKE_TOOLCHAIN_FILE=../cmake_files/cmake_template.cmake  ..

when i call make, it returns

[  2%] Building C object 3rdparty/libtiff/CMakeFiles/libtiff.dir/tif_packbits.c.o
[  2%] Building C object 3rdparty/libtiff/CMakeFiles/libtiff.dir/tif_pixarlog.c.o
/home/spm1407/backup/opencv-3.1.0/3rdparty/libtiff/tif_pixarlog.c(93): catastrophic error: cannot open source file "zlib.h"
  #include "zlib.h"
                   ^

compilation aborted for /home/spm1407/backup/opencv-3.1.0/3rdparty/libtiff/tif_pixarlog.c (code 4)

How can i resolve??
Thanks

[Gregg_S_Intel]

Were the libraries built with -mmic option?  All of the objects have to be k1om.

[Maurizio_I_]

Gregg S. (Intel) wrote:

Were the libraries built with -mmic option?  All of the objects have to be k1om.

Gregg, i tried to compile OpenCv with -mmic but it fails. What's means " All of the objects have to be k1om" ??

Thanks

[Gregg_S_Intel]

The first generation Intel Xeon Phi coprocessor has a unique instruction set.  Every object in the link command has to have been built with -mmic option.  The "skipping incompatible" messages means those libraries were not built with -mmic.

[Maurizio_I_]

Gregg, thank you! Ok, so i compile all libraries with mmic, such as opencv. Please, can you help me?

FFMPEG is compileg with icc -mmic, in fact when i call ffmpeg, program returns
 

ffmpeg version N-80186-g39c0b22 Copyright (c) 2000-2016 the FFmpeg developers
  built with icc (ICC) 15.0.2 20150121
  configuration: --prefix=/home/spm1407/ffmpeg_build --bindir=/home/spm1407/bin --enable-shared --disable-yasm --enable-pic --enable-cross-compile --arch=x86_64 --target-os=linux --cc=icc --cxx=icpc
  libavutil      55. 24.100 / 55. 24.100
  libavcodec     57. 44.100 / 57. 44.100
  libavformat    57. 37.101 / 57. 37.101
  libavdevice    57.  0.101 / 57.  0.101
  libavfilter     6. 46.100 /  6. 46.100
  libswscale      4.  1.100 /  4.  1.100
  libswresample   2.  0.101 /  2.  0.101
Hyper fast Audio and Video encoder
usage: ffmpeg [options] [[infile options] -i infile]... {[outfile options] outfile}...

Use -h to get full help or, even better, run 'man ffmpeg'

I tried to compile OpenCV but it returns many errors. I resolve almost all errors, but one is relative to x86_64-k1om-linux-ld, if fact build returns

x86_64-k1om-linux-ld: cannot find -lbz2
x86_64-k1om-linux-ld: cannot find -lgtk-x11-2.0
x86_64-k1om-linux-ld: cannot find -lgdk-x11-2.0
x86_64-k1om-linux-ld: cannot find -latk-1.0
x86_64-k1om-linux-ld: cannot find -lgio-2.0
x86_64-k1om-linux-ld: cannot find -lpangoft2-1.0
x86_64-k1om-linux-ld: cannot find -lgdk_pixbuf-2.0
x86_64-k1om-linux-ld: cannot find -lpangocairo-1.0
x86_64-k1om-linux-ld: cannot find -lcairo
x86_64-k1om-linux-ld: cannot find -lpango-1.0
x86_64-k1om-linux-ld: cannot find -lfreetype
x86_64-k1om-linux-ld: cannot find -lfontconfig
x86_64-k1om-linux-ld: cannot find -lgobject-2.0
x86_64-k1om-linux-ld: cannot find -lgmodule-2.0
x86_64-k1om-linux-ld: cannot find -lgthread-2.0
x86_64-k1om-linux-ld: cannot find -lglib-2.0
x86_64-k1om-linux-ld: cannot find -lgstbase-0.10
x86_64-k1om-linux-ld: cannot find -lgstreamer-0.10
x86_64-k1om-linux-ld: cannot find -lxml2
x86_64-k1om-linux-ld: cannot find -lgobject-2.0
x86_64-k1om-linux-ld: cannot find -lgmodule-2.0
x86_64-k1om-linux-ld: cannot find -lgthread-2.0
x86_64-k1om-linux-ld: cannot find -lglib-2.0
x86_64-k1om-linux-ld: cannot find -lgstbase-0.10
x86_64-k1om-linux-ld: cannot find -lgstreamer-0.10
x86_64-k1om-linux-ld: cannot find -lxml2
x86_64-k1om-linux-ld: cannot find -lavcodec
x86_64-k1om-linux-ld: cannot find -lavformat
x86_64-k1om-linux-ld: cannot find -lavutil
x86_64-k1om-linux-ld: cannot find -lswscale
make[2]: *** [bin/opencv_perf_core] Error 1
make[1]: *** [modules/core/CMakeFiles/opencv_perf_core.dir/all] Error 2
make: *** [all] Error 2

I build OpenCv with 

cmake -D CMAKE_BUILD_TYPE=RELEASE -D CMAKE_INSTALL_PREFIX=$HOME/lib/opencv-3.1.0 -D WITH_GTK=ON  -DCMAKE_TOOLCHAIN_FILE=../cmake_files/cmake_template.cmake  -DCMAKE_C_FLAGS=-mmic -DCMAKE_CXX_FLAGS=-mmic  -DWITH_TIFF=OFF -DWITH_OPENEXR=OFF -DWITH_PNG=OFF  -DBUILD_LIBJPEG=ON -DBUILD_SHARED_LIBS=OFF  ..

Any suggest? Thanks

[Gregg_S_Intel]

You find some or all of the libraries you need compiled with -mmic here:

https://software.intel.com/en-us/articles/intel-and-third-party-tools-and-libraries-available-with-support-for-intelr-xeon-phitm

[Gregg_S_Intel]

See especially the tar file "Software for Coprocessor OS (k1om)" available with Intel® Manycore Platform Software Stack (Intel® MPSS).

https://software.intel.com/en-us/articles/intel-manycore-platform-software-stack-mpss

[Gregg_S_Intel]

 To be clear, what I'm saying is you need k1om versions of each and every one of those libraries.  All objects in the link have to be k1om; that is, built with -mmic.