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直到昨天，我的程序正确编译和链接。从今天开始，相同的程序（相同的源和相同的环境），不链接。未找到 boost 库。

CMakeLists.txt 文件的顶部：

...
find_package (Boost REQUIRED)
set (Boost_USE_STATIC_LIBS ON)
set (Boost_USE_MULTITHREADED OFF)
set (Boost_USE_STATIC_RUNTIME OFF)
find_package (Boost COMPONENTS program_options)

if (Boost_FOUND)
    include_directories(${Boost_INCLUDE_DIRS})
endif()
...

运行 cmake：

cmake -DCMAKE_BUILD_TYPE=Release -DBUILD_DOCUMENTATION=ON ../NumberPuncher/
-- The C compiler identification is GNU 4.7.1
-- The CXX compiler identification is GNU 4.7.1
-- Check for working C compiler: /usr/bin/gcc
-- Check for working C compiler: /usr/bin/gcc -- works
-- Detecting C compiler ABI info
-- Detecting C compiler ABI info - done
-- 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
-- Boost version: 1.49.0
-- Could NOT find Boost
-- Configuring done
-- Generating done
-- Build files have been written to: /SWEnvironment/sw/NumberPuncher_prj/Release

该行：

-- 增强版：1.49.0

错了，因为我安装的Boost是1.54.0。但是，在 CMakeLists.txt 文件中，没有指定 boost 版本，也不需要。

构建程序时，我得到与此类 Boost 相关的链接错误：

entrypoint.cpp:(.text.startup+0x6be): undefined reference to `boost::program_options::options_description::add_options()'

起初我以为包含 Boost 的目录已被删除，但它仍然存在。

我做了一个干净的构建，重新运行 cmake，但问题仍然存在。

任何想法？

环境：
Linux OpenSuse 12.2
GCC/G++ 4.7.1
Boost 1.54.0

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1 回答 1

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Moving the find_package(Boost COMPONENTS program_options) command where the find_package(Boost REQUIRED) was fixed the problem:

find_package (Boost COMPONENTS program_options)
set (Boost_USE_STATIC_LIBS ON)
set (Boost_USE_MULTITHREADED OFF)
set (Boost_USE_STATIC_RUNTIME OFF)

I still cannot understand why it has always worked in the past. If anybody could clarify that I would appreciate. Anyway now it should work in the future, too.

于 2013-09-04T17:57:51.827 回答