I have the following directory structure:
~/emsdk ~/opencv
I am trying to build OpenCV.js
I do
cd ~/opencv python ./platforms/js/build_js.py build_js --emscripten_dir=~/emsdk/
Which results in:
CMake Error at /usr/share/cmake-3.10/Modules/CMakeDetermineSystem.cmake:100 (message): Could not find toolchain file: ~/emsdk/cmake/Modules/Platform/Emscripten.cmake Call Stack (most recent call first): CMakeLists.txt:135 (project) CMake Error: CMake was unable to find a build program corresponding to "Unix Makefiles". CMAKE_MAKE_PROGRAM is not set. You probably need to select a different build tool. CMake Error: CMAKE_CXX_COMPILER not set, after EnableLanguage CMake Error: CMAKE_C_COMPILER not set, after EnableLanguage -- Configuring incomplete, errors occurred! Traceback (most recent call last): File "./platforms/js/build_js.py", line 227, in <module> builder.config() File "./platforms/js/build_js.py", line 167, in config execute(cmd) File "./platforms/js/build_js.py", line 23, in execute raise Fail("Child returned: %s" % retcode) __main__.Fail: Child returned: 1
Both gcc and g++ are installed in the system. Prior of running this I went to ~/emsdk and ran:
./emsdk update ./emsdk install latest ./emsdk activate latest source ./emsdk_env.sh
I am not sure why this is failing. I am trying to follow this [tutorial][1].
EDIT:
I am doing this on Ubuntu, if it helps
EDIT 2:
It seems an important part of the problem comes from the message:
CMake Error at /usr/share/cmake-3.10/Modules/CMakeDetermineSystem.cmake:100 (message): Could not find toolchain file: ~/emsdk/cmake/Modules/Platform/Emscripten.cmake
There is no emsdk/cmake
directory.
EDIT 3:
Posting answer, it was the path
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Answer
The problem is a stupid assumption on my end. Writing:
python ./platforms/js/build_js.py build_js --emscripten_dir=~/emsdk/
Is the wrong command, the correct one is:
python ./platforms/js/build_js.py build_js --emscripten_dir=/home/username/emsdk/emscripten/1.38.30/