如何将ICU库添加到项目中？

Question

请帮帮我。我想将 ICU 库添加到我的项目中。我的cmake版本是2.8.12.2.

有CMakeLists.txt

cmake_minimum_required(VERSION 2.8)

project(test1)

set(CMAKE_MODULE_PATH ${PROJECT_SOURCE_DIR})
set(CMAKE_CXX_COMPILER /usr/bin/g++)
set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -D_GLIBCXX_USE_CXX11_ABI=0 -std=c++11 -Wall")

find_package(Boost 1.54.0 COMPONENTS filesystem system regex unit_test_framework REQUIRED)
find_package(ICU 52.0 REQUIRED )

include_directories(${Boost_INCLUDE_DIR})
link_directories(${Boost_LIBRARY_DIR})

add_executable(test1 src/dictionary.cpp src/main.cpp )
target_link_libraries( test1 ${Boost_LIBRARIES} pthread )

我已经安装了 ICU 库：libicu-dev、libicu-dev:i386、libicu52、libicu52:i386、libicu52-dbg:i386

但是一旦我运行 CMake，我收到以下错误消息：

CMake Error at CMakeLists.txt:10 (find_package):
  By not providing "FindICU.cmake" in CMAKE_MODULE_PATH this project has
  asked CMake to find a package configuration file provided by "ICU", but
  CMake did not find one.

  Could not find a package configuration file provided by "ICU" (requested
  version 52.1) with any of the following names:

    ICUConfig.cmake
    icu-config.cmake

  Add the installation prefix of "ICU" to CMAKE_PREFIX_PATH or set "ICU_DIR"
  to a directory containing one of the above files.  If "ICU" provides a
  separate development package or SDK, be sure it has been installed.

我该怎么办？请帮助我。

Answer 1

通过在 http://github.com/julp/FindICU.cmake

的项目目录顶部添加文件 FindICU.cmake 解决了这个问题

Answer 2

一切都是关于包含 headers 和链接库。对于小型项目，您可能可以这样做，（假设您已经正确安装了 ICU，并且可以运行手动）

include_directories(${ICU_INCLUDE_DIRS})
link_directories(${ICU_LIBRARY_DIRS})
add_executable(test1 src/dictionary.cpp src/main.cpp ) 
target_link_libraries(test1 ${ICU_LIBRARIES})

当您运行 "cmake"检查cmake是否找到正确路径时，您可以使用下面打印信息。

MESSAGE("ICU_INCLUDE_DIRS: " ${ICU_INCLUDE_DIRS})

我使用的cmake版本是3.5.2

Answer 3

使用 CMake 3.13。

add_executable(myapp
    main.cpp
)

# ICU Components Reference:
# https://cmake.org/cmake/help/latest/module/FindICU.html
# ICU components = data, i18n, io, le, lx, test, tu and uc.

find_package(ICU 61.0 COMPONENTS uc i18n REQUIRED)

# Link using the imported target names (ICU::uc, ICU::i18n, etc.)

target_link_libraries(myapp ICU::uc ICU::i18n)

注意：除非我在 find_package 语句中特别列出组件，否则这不会起作用。

Answer 4

如果需要ICU 库，请使用：

find_package(ICU REQUIRED components...)
target_link_libraries(lab1 ${ICU_LIBRARIES})

如果可选，使用：

find_package(ICU COMPONENTS components...)
target_link_libraries(lab1 ${ICU_LIBRARIES})

其中 components... 是可以找到的 ICU 库组件列表 here。
插入这些行仅在add_executable命令之后！

如何将ICU库添加到项目中？

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