Thanks for reporting, I think this is fixed by https://github.com/kripken/emscripten/commit/2e56e7764fcfac0dc617723283cf064dd7115cbd, which is currently in the incoming branch (./emsdk install sdk-incoming-64bit && ./emsdk activate sdk-incoming-64bit)
2016-06-14 10:11 GMT+03:00 Gunjan Shrivastava <[email protected]>: > Hello Kuo, > > > I am trying to compile OpenCV library in Emscripten using > https://github.com/kakukogou/opencv/tree/opencvjs. I successfully > completed the steps till: > > > emcmake cmake -DBUILD_CUDA_STUBS=OFF -DBUILD_DOCS=OFF -DBUILD_EXAMPLES=OFF > -DBUILD_JASPER=OFF -DBUILD_JPEG=OFF -DBUILD_OPENEXR=OFF > -DBUILD_PERF_TESTS=OFF -DBUILD_PNG=OFF -DBUILD_TBB=OFF -DBUILD_TESTS=OFF > -DBUILD_TIFF=OFF -DBUILD_WITH_DEBUG_INFO=OFF -DBUILD_ZLIB=OFF > -DBUILD_opencv_apps=OFF -DBUILD_opencv_ts=OFF -DBUILD_opencv_world=OFF > -DWITH_1394=OFF -DWITH_CLP=OFF -DWITH_CUBLAS=OFF -DWITH_CUDA=OFF > -DWITH_CUFFT=OFF -DWITH_FFMPEG=OFF -DWITH_GDAL=OFF -DWITH_GIGEAPI=OFF > -DWITH_GSTREAMER=OFF -DWITH_GSTREAMER_0_10=OFF -DWITH_GTK=OFF > -DWITH_GTK_2_X=OFF -DWITH_JASPER=OFF -DWITH_JPEG=OFF -DWITH_LIBV4L=OFF > -DWITH_NVCUVID=OFF -DWITH_OPENCL=OFF -DWITH_OPENCLAMDBLAS=OFF > -DWITH_OPENCLAMDFFT=OFF -DWITH_OPENEXR=OFF -DWITH_OPENGL=OFF > -DWITH_OPENMP=OFF -DWITH_OPENNI=OFF -DWITH_OPENNI2=OFF -DWITH_PNG=OFF > -DWITH_PVAPI=OFF -DWITH_QT=OFF -DWITH_TBB=OFF -DWITH_TIFF=OFF > -DWITH_UNICAP=OFF -DWITH_V4L=OFF -DWITH_VTK=OFF -DWITH_WEBP=OFF > -DWITH_XIMEA=OFF -DWITH_XINE=OFF -DBUILD_SHARED_LIBS=ON -DBUILD_PACKAGE=ON > -DCMAKE_COLOR_MAKEFILE=ON -DWITH_EIGEN=ON -DCMAKE_BUILD_TYPE=RELEASE > -DCMAKE_CXX_FLAGS_RELEASE="-DNDEBUG -O3 -s PRECISE_F32=1 > -Wno-warn-absolute-paths" -DCMAKE_CXX_FLAGS_RELWITHDEBINFO="-O3 -s > PRECISE_F32=1" -DCMAKE_C_FLAGS_RELEASE="-DNDEBUG -O3 -s PRECISE_F32=1" > -DCMAKE_C_FLAGS_RELWITHDEBINFO="-O3 -s PRECISE_F32=1" > -DCMAKE_EXE_LINKER_FLAGS_RELEASE="-O3 -s PRECISE_F32=1" > -DCMAKE_EXE_LINKER_FLAGS_RELWITHDEBINFO="-O3 -g -s PRECISE_F32=1" > -DCMAKE_MODULE_LINKER_FLAGS_RELEASE="-O3 -s PRECISE_F32=1" > -DCMAKE_MODULE_LINKER_FLAGS_RELWITHDEBINFO="-O3 -g -s PRECISE_F32=1" > -DCMAKE_SHARED_LINKER_FLAGS_RELEASE="-O3 -s PRECISE_F32=1" > -DCMAKE_SHARED_LINKER_FLAGS_RELWITHDEBINFO="-O3 -g -s PRECISE_F32=1" .. > > > but I am getting following error on ‘emmake make’: > > > [ 5%] Built target zlib > > [ 5%] Generating opencl_kernels_core.cpp, opencl_kernels_core.hpp > > Scanning dependencies of target opencv_core > > [ 7%] Building CXX object > modules/core/CMakeFiles/opencv_core.dir/src/rand.cpp.o > > In file included from > /home/gunjan/Downloads/emsdk_portable/opencv/modules/core/src/rand.cpp:49: > > In file included from > /home/gunjan/Downloads/emsdk_portable/opencv/modules/core/src/precomp.hpp:55: > > In file included from > /home/gunjan/Downloads/emsdk_portable/opencv/modules/core/include/opencv2/core/private.hpp:58: > > In file included from /usr/include/eigen3/Eigen/Core:263: > > */usr/include/eigen3/Eigen/src/Core/arch/SSE/PacketMath.h:333:76: error: > no matching function for call to '_mm_prefetch'* > > *template<> EIGEN_STRONG_INLINE void prefetch<float>(const float* addr) > { _mm_prefetch((const char*)(addr), _MM_HINT_T0);* } > > > ^~~~~~~~~~~~ > > */home/gunjan/Downloads/emsdk_portable/emscripten/master/system/include/emscripten/xmmintrin.h:129:1: > note: candidate function not viable: no known conversion from 'const char > *' to 'void *' for 1st* > > * argument* > > *_mm_prefetch(void *__p, int __i)* > > > Please refer the screenshot for additional information. > > Any help in this regard would be greatly beneficial for my project. Please > let me know if you need any other detail. > > > > Thank you. > > -Gunjan > > > > > On Wednesday, 31 December 2014 01:51:22 UTC-5, Tzu-Hao Kuo (Kaku) wrote: >> >> HI, >> >> I recently evaluate the performance of OpenCV with asm.js. >> Thanks to the OpenCV team, there are already lots of performance tests in >> each OpenCV module. >> What I have done is that compile OpenCV library and its performance tests >> both in native and with asm.js. >> Run the native performance test and the javascript performance test (with >> the Firefox javascript engine). >> And the statistics data could be found in the following Google Sheet >> link:https://docs.google.com/spreadsheets/d/1w8gr1_q_dQclTaGyiMtAhlwj_5_HPVKbHWfwUszPU40/edit?usp=sharing >> >> In summary, there are about 20% tests are faster or equal to the native >> performance and about 60% tests are faster than 3x native performance. >> >> Some patterns are observed. >> First, tests with operations which convert floating point values into >> integer values are much slower. >> Second, in native environment, single operation is much faster when it is >> dealing with integer type data comparing to dealing with floating point >> values; >> however, in javascript environment, the same operation performs equally in >> each data type, which leads to relatively larger performance drop in >> non-floating point data type. >> >> >> By traversing old posts, I found several people have tried to use OpenCV >> in their own projects, however, there is few performance information. >> I post this message here is intending to open a discussion forum which >> could collect information about OpenCV with asm.js and especially the >> performance. >> This message is also posted as a discussion bug in Mozilla Bugzilla, the >> link is, https://bugzilla.mozilla.org/show_bug.cgi?id=1116674. >> >> Tzuhao >> > -- > You received this message because you are subscribed to the Google Groups > "emscripten-discuss" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to [email protected]. > For more options, visit https://groups.google.com/d/optout. > -- You received this message because you are subscribed to the Google Groups "emscripten-discuss" group. 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