嗨，我正在使用高山映像为Java安装opencv，但是我发现无法构建Java：
FROM openjdk:8-alpine3.9
ENV ANT_VERSION 1.10.5-r0
ENV ANT_HOME /usr/share/java/apache-ant
ENV JAVA_HOME /usr/lib/jvm/java-1.8-openjdk
ENV JAVA_APPEND_LIBRARY_DIRECTORIES ${JAVA_HOME}/lib/amd64
ENV JAVA_AWT_INCLUDE_DIRECTORIES ${JAVA_HOME}/include
RUN apk add --no-cache build-base cmake ccache apache-ant=${ANT_VERSION} pkgconfig
ADD opencv-4.0.1 /tmp/opencv-4.0.1
RUN mkdir -p /tmp/opencv-4.0.1/build
WORKDIR /tmp/opencv-4.0.1/build
RUN cmake -D BUILD_SHARED_LIBS=OFF ..
我从容器中验证了所有环境都指向正确的文件夹，并且这些文件夹存在。
Cmake命令显示：
-- The CXX compiler identification is GNU 8.3.0
-- The C compiler identification is GNU 8.3.0
-- Check for working CXX compiler: /usr/bin/c++
-- Check for working CXX compiler: /usr/bin/c++ -- works
-- Detecting CXX compiler ABI info
-- Detecting CXX compiler ABI info - done
-- Detecting CXX compile features
-- Detecting CXX compile features - done
-- Check for working C compiler: /usr/bin/cc
-- Check for working C compiler: /usr/bin/cc -- works
-- Detecting C compiler ABI info
-- Detecting C compiler ABI info - done
-- Detecting C compile features
-- Detecting C compile features - done
-- Could NOT find PythonInterp (missing: PYTHON_EXECUTABLE) (Required is at least version "2.7")
-- Could NOT find PythonInterp (missing: PYTHON_EXECUTABLE) (Required is at least version "3.2")
-- Looking for ccache - found (/usr/bin/ccache)
-- Performing Test HAVE_CXX_FSIGNED_CHAR
-- Performing Test HAVE_CXX_FSIGNED_CHAR - Success
...
-- Found apache ant: /usr/bin/ant (1.10.5)
-- Found JNI: /usr/lib/jvm/java-1.8-openjdk/jre/lib/amd64/libjawt.so
-- VTK is not found. Please set -DVTK_DIR in CMake to VTK build directory, or to VTK install subdirectory with VTKConfig.cmake file
...
-- General configuration for OpenCV 4.0.1 =====================================
-- Version control: unknown
--
-- Platform:
-- Timestamp: 2019-05-12T15:35:59Z
-- Host: Linux 4.9.125-linuxkit x86_64
-- CMake: 3.13.0
-- CMake generator: Unix Makefiles
-- CMake build tool: /usr/bin/make
-- Configuration: Release
--
-- CPU/HW features:
-- Baseline: SSE SSE2 SSE3
-- requested: SSE3
-- Dispatched code generation: SSE4_1 SSE4_2 FP16 AVX AVX2 AVX512_SKX
-- requested: SSE4_1 SSE4_2 AVX FP16 AVX2 AVX512_SKX
-- SSE4_1 (7 files): + SSSE3 SSE4_1
-- SSE4_2 (2 files): + SSSE3 SSE4_1 POPCNT SSE4_2
-- FP16 (1 files): + SSSE3 SSE4_1 POPCNT SSE4_2 FP16 AVX
-- AVX (5 files): + SSSE3 SSE4_1 POPCNT SSE4_2 AVX
-- AVX2 (13 files): + SSSE3 SSE4_1 POPCNT SSE4_2 FP16 FMA3 AVX AVX2
-- AVX512_SKX (1 files): + SSSE3 SSE4_1 POPCNT SSE4_2 FP16 FMA3 AVX AVX2 AVX_512F AVX512_SKX
--
-- C/C++:
-- Built as dynamic libs?: NO
-- C++ Compiler: /usr/bin/c++ (ver 8.3.0)
-- C++ flags (Release): -fsigned-char -W -Wall -Werror=return-type -Werror=non-virtual-dtor -Werror=address -Werror=sequence-point -Wformat -Werror=format-security -Wmissing-declarations -Wundef -Winit-self -Wpointer-arith -Wshadow -Wsign-promo -Wuninitialized -Winit-self -Wsuggest-override -Wno-narrowing -Wno-delete-non-virtual-dtor -Wno-comment -Wimplicit-fallthrough=3 -Wno-strict-overflow -fdiagnostics-show-option -Wno-long-long -pthread -fomit-frame-pointer -ffunction-sections -fdata-sections -msse -msse2 -msse3 -fvisibility=hidden -fvisibility-inlines-hidden -O3 -DNDEBUG -DNDEBUG
-- C++ flags (Debug): -fsigned-char -W -Wall -Werror=return-type -Werror=non-virtual-dtor -Werror=address -Werror=sequence-point -Wformat -Werror=format-security -Wmissing-declarations -Wundef -Winit-self -Wpointer-arith -Wshadow -Wsign-promo -Wuninitialized -Winit-self -Wsuggest-override -Wno-narrowing -Wno-delete-non-virtual-dtor -Wno-comment -Wimplicit-fallthrough=3 -Wno-strict-overflow -fdiagnostics-show-option -Wno-long-long -pthread -fomit-frame-pointer -ffunction-sections -fdata-sections -msse -msse2 -msse3 -fvisibility=hidden -fvisibility-inlines-hidden -g -O0 -DDEBUG -D_DEBUG
-- C Compiler: /usr/bin/cc
-- C flags (Release): -fsigned-char -W -Wall -Werror=return-type -Werror=non-virtual-dtor -Werror=address -Werror=sequence-point -Wformat -Werror=format-security -Wmissing-declarations -Wmissing-prototypes -Wstrict-prototypes -Wundef -Winit-self -Wpointer-arith -Wshadow -Wuninitialized -Winit-self -Wno-narrowing -Wno-comment -Wimplicit-fallthrough=3 -Wno-strict-overflow -fdiagnostics-show-option -Wno-long-long -pthread -fomit-frame-pointer -ffunction-sections -fdata-sections -msse -msse2 -msse3 -fvisibility=hidden -O3 -DNDEBUG -DNDEBUG
-- C flags (Debug): -fsigned-char -W -Wall -Werror=return-type -Werror=non-virtual-dtor -Werror=address -Werror=sequence-point -Wformat -Werror=format-security -Wmissing-declarations -Wmissing-prototypes -Wstrict-prototypes -Wundef -Winit-self -Wpointer-arith -Wshadow -Wuninitialized -Winit-self -Wno-narrowing -Wno-comment -Wimplicit-fallthrough=3 -Wno-strict-overflow -fdiagnostics-show-option -Wno-long-long -pthread -fomit-frame-pointer -ffunction-sections -fdata-sections -msse -msse2 -msse3 -fvisibility=hidden -g -O0 -DDEBUG -D_DEBUG
-- Linker flags (Release):
-- Linker flags (Debug):
-- ccache: YES
-- Precompiled headers: NO
-- Extra dependencies: ade dl m pthread rt
-- 3rdparty dependencies: ittnotify libprotobuf zlib libjpeg-turbo libwebp libpng libtiff libjasper IlmImf quirc ippiw ippicv
--
-- OpenCV modules:
-- To be built: calib3d core dnn features2d flann gapi highgui imgcodecs imgproc java_bindings_generator ml objdetect photo python_bindings_generator stitching ts video videoio
-- Disabled: world
-- Disabled by dependency: -
-- Unavailable: java js python2 python3
-- Applications: tests perf_tests apps
-- Documentation: NO
-- Non-free algorithms: NO
--
-- GUI:
-- GTK+: NO
-- VTK support: NO
--
-- Media I/O:
-- ZLib: build (ver 1.2.11)
-- JPEG: libjpeg-turbo (ver 1.5.3-62)
-- WEBP: build (ver encoder: 0x020e)
-- PNG: build (ver 1.6.35)
-- TIFF: build (ver 42 - 4.0.9)
-- JPEG 2000: build (ver 1.900.1)
-- OpenEXR: build (ver 1.7.1)
-- HDR: YES
-- SUNRASTER: YES
-- PXM: YES
-- PFM: YES
--
-- Video I/O:
-- DC1394: NO
-- FFMPEG: NO
-- avcodec: NO
-- avformat: NO
-- avutil: NO
-- swscale: NO
-- avresample: NO
-- GStreamer: NO
-- v4l/v4l2: NO
--
-- Parallel framework: pthreads
--
-- Trace: YES (with Intel ITT)
--
-- Other third-party libraries:
-- Intel IPP: 2019.0.0 Gold [2019.0.0]
-- at: /tmp/opencv-4.0.1/build/3rdparty/ippicv/ippicv_lnx/icv
-- Intel IPP IW: sources (2019.0.0)
-- at: /tmp/opencv-4.0.1/build/3rdparty/ippicv/ippicv_lnx/iw
-- Lapack: NO
-- Eigen: NO
-- Custom HAL: NO
-- Protobuf: build (3.5.1)
--
-- OpenCL: YES (no extra features)
-- Include path: /tmp/opencv-4.0.1/3rdparty/include/opencl/1.2
-- Link libraries: Dynamic load
--
-- Python (for build): NO
--
-- Java:
-- ant: /usr/bin/ant (ver 1.10.5)
-- JNI: /usr/lib/jvm/java-1.8-openjdk/include /usr/lib/jvm/java-1.8-openjdk/include/linux /usr/lib/jvm/java-1.8-openjdk/include
-- Java wrappers: NO
-- Java tests: NO
--
-- Install to: /usr/local
-- -----------------------------------------------------------------
--
-- Configuring done
-- Generating done
-- Build files have been written to: /tmp/opencv-4.0.1/build
答案 0 :(得分：0)
最后，当安装python2时，java出现在构建目标上。我不知道为什么会这样。 Java指南中没有提及如何为Java构建opencv。
安装python后的配置更改为
require 'open-uri'
raw_url = "https://raw.githubusercontent.com/username/myrepo/master/Gemfile"
open(raw_url) {|f|
f.each_line {|line| p line}
}