我正在尝试从Android Studio中的C++ source code构建ZXing。但是CMake会引发很多错误,而我对NDK的开发经验不足,而且错误的描述性不足以理解,无法弄清这里出了什么问题。现在,我面临以下问题;
CMake Error at CMakeLists.txt:90 (add_executable):
CMake Error at CMakeLists.txt:91 (add_executable):
CMake Error at CMakeLists.txt:92 (target_link_libraries):
我尝试通读CMake docs以了解命令的语法,它们在CMakeLists.txt(在下面列出)中看起来还不错。
有人可以对这些本地的东西有经验吗?
CMakeLists.txt
cmake_minimum_required(VERSION 3.0)
project(zxing)
option(BUILD_TESTING "Enable generation of test targets" OFF)
set(CMAKE_LIBRARY_PATH /opt/local/lib ${CMAKE_LIBRARY_PATH})
set(OpenCV_DIR C:/opencv-3.4.3-android-sdk/OpenCV-android-sdk/sdk/native/jni)
# set(Iconv_DIR C:/Users/bcs/Downloads/libiconv-1.9.2-1-bin)
# Check for polluted source tree.
if(EXISTS ${CMAKE_SOURCE_DIR}/CMakeCache.txt OR
EXISTS ${CMAKE_SOURCE_DIR}/CMakeFiles)
message(FATAL_ERROR
"Source directory is polluted:"
"\n * remove CMakeCache.txt"
"\n * remove CMakeFiles directory")
endif()
# Suppress in-source builds.
if(${CMAKE_SOURCE_DIR} STREQUAL ${CMAKE_BINARY_DIR})
message(FATAL_ERROR
"CMake generation is not allowed within the source directory:"
"\n * mkdir build"
"\n * cd build"
"\n * Unix-like: cmake -G \"Unix Makefiles\" .."
"\n * Windows: cmake -G \"Visual Studio 10\" ..")
endif()
# Adjust CMake's module path.
list(APPEND CMAKE_MODULE_PATH ${CMAKE_SOURCE_DIR}/cmake/FindModules)
# Suppress MSVC CRT warnings.
if(MSVC)
add_definitions(-D_CRT_SECURE_NO_WARNINGS)
add_definitions(/Za)
add_definitions(/MP) # multi-core builds
endif()
include(source_files.cmake)
if(WIN32)
include_directories(core/lib/win32)
set(CMAKE_DEBUG_POSTFIX -debug)
endif()
# OpenCV classes
find_package(OpenCV)
if(OpenCV_FOUND)
list(APPEND LIBZXING_FILES
opencv/src/zxing/MatSource.cpp
opencv/src/zxing/MatSource.h
)
include_directories(${OpenCV_INCLUDE_DIRS})
include_directories(opencv/src)
endif()
include_directories(core/src)
add_library(libzxing ${LIBZXING_FILES})
set_target_properties(libzxing PROPERTIES PREFIX "")
find_package(Iconv)
if(ICONV_FOUND)
include_directories(${ICONV_INCLUDE_DIR})
target_link_libraries(libzxing ${ICONV_LIBRARIES})
else()
add_definitions(-DNO_ICONV=1)
endif()
add_definitions(-DNO_ICONV=1)
# Add OpenCV cli executable
if(OpenCV_FOUND)
file(GLOB_RECURSE OPENCV_ZXING_FILES
"./opencv-cli/src/*.cpp"
"./opencv-cli/src/*.h"
)
# add_executable(zxing-cv ${OPENCV_ZXING_FILES})
add_executable(zxing-cv "./opencv-cli/src/*.cpp")
target_link_libraries(zxing-cv libzxing ${OpenCV_LIBRARIES})
endif()
# Add cli executable.
file(GLOB_RECURSE ZXING_FILES
"./cli/src/*.cpp"
"./cli/src/*.h"
)
add_executable(zxing ${ZXING_FILES})
add_executable(zxing-cv "./opencv-cli/src/*.cpp")
target_link_libraries(zxing libzxing)
install(TARGETS zxing libzxing EXPORT zxing-targets
LIBRARY DESTINATION lib
RUNTIME DESTINATION bin
ARCHIVE DESTINATION lib
INCLUDES DESTINATION include
)
install(EXPORT zxing-targets DESTINATION lib/zxing/cmake NAMESPACE zxing::)
install(
DIRECTORY core/src/zxing/
DESTINATION include/zxing
FILES_MATCHING PATTERN "*.h"
)
if(OpenCV_FOUND)
install(
DIRECTORY opencv/src/zxing/
DESTINATION include/zxing
FILES_MATCHING PATTERN "*.h"
)
endif()
configure_file(cmake/zxing-config.cmake.in zxing-config.cmake @ONLY)
install(FILES ${CMAKE_BINARY_DIR}/zxing-config.cmake DESTINATION lib/zxing/cmake)
if(BUILD_TESTING)
# Add testrunner executable.
find_package(CPPUNIT)
if(CPPUNIT_FOUND)
file(GLOB_RECURSE TESTRUNNER_FILES
"./core/tests/src/*.cpp"
"./core/tests/src/*.h"
)
add_executable(testrunner ${TESTRUNNER_FILES})
include_directories(${CPPUNIT_INCLUDE_DIR})
target_link_libraries(testrunner libzxing ${CPPUNIT_LIBRARIES})
endif()
endif()
最佳答案
您可以切换到nu-book / zxing-cpp
ZXing到C++的各个端口之间存在相当多的混淆。从最近开始, nu-book/zxing-cpp
被视为类似于this discussion的“官方” ZXing C++端口。
根据我自己的估计,这是当前端口中最活跃,最先进的端口。它与您尝试使用的glassechidna/zxing-cpp端口不同,它是在C++中完全重新实现的,而不是从原始ZXing Java API到C++的直接1:1端口。那应该在C++环境中将名称等命名为“nicer”。
建立它
构建nu-book / zxing-cpp并在应用程序中使用它没有大问题(尽管我尚未在Android上尝试过)。我没有使用Android Studio来构建它,而是使用了控制台,如下所示:
cd /path/to/zxing-cpp/sources && mkdir build && cd build
cmake .. -DCMAKE_INSTALL_PREFIX=/path/to/zxing-cpp/sources/export
make
make install
之后,您可以在配置了cmake .. -DCMAKE_PREFIX_PATH=/path/to/zxing-cpp/sources/export/lib/cmake/ZXing
的基于CMake的项目中使用它,并将其包含在CMakeLists.txt
中:find_package(ZXing REQUIRED)
add_executable( ... )
target_link_libraries(minimal-zxing-demo ZXing::ZXing)
关于android - 尝试为Android构建ZXing( native )时CMake脚本引发错误,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/52214820/