wip opencv script

TODO link in build_all

scripts/linux/build_opencv.sh

@@ -0,0 +1,46 @@
+#!/bin/sh
+
+# Set up variables.
+OPENCV_VERSION=4.5.5
+OPENCV_SRC_DIR=opencv
+BUILD_DIR=build
+
+# Create build directory.
+mkdir -p $BUILD_DIR
+cd $BUILD_DIR
+
+# Clone OpenCV repository.
+git clone https://github.com/opencv/opencv.git -b $OPENCV_VERSION $OPENCV_SRC_DIR
+cd $OPENCV_SRC_DIR
+
+# Create build subdirectory.
+mkdir -p build && cd build
+
+# Configure OpenCV build.
+cmake .. \
+    -DCMAKE_BUILD_TYPE=Release \
+    -DBUILD_SHARED_LIBS=ON \
+    -DBUILD_TESTS=OFF \
+    -DBUILD_PERF_TESTS=OFF \
+    -DBUILD_EXAMPLES=OFF \
+    -DBUILD_opencv_apps=OFF \
+    -DBUILD_opencv_python2=OFF \
+    -DBUILD_opencv_python3=OFF \
+    -DWITH_FFMPEG=OFF \
+    -DWITH_GSTREAMER=OFF \
+    -DWITH_GTK=OFF \
+    -DWITH_QT=OFF \
+    -DWITH_CUDA=OFF
+
+# Build OpenCV.
+cmake --build . -- -j$(nproc)
+
+# Create libopencv_wrapper.so.
+g++ -shared -o libopencv_wrapper.so -Wl,--whole-archive lib/libopencv_*.a -Wl,--no-whole-archive
+
+# Copy libopencv_wrapper.so to the main build directory.
+mkdir -p ../../../../build
+cp libopencv_wrapper.so "../../../../build/libopencv_wrapper.so"
+
+# Return to the original directory.
+cd ../../../