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c++ - CMake 为 boost 标头选择了错误的库

问题描述

我在 travis 上使用 CMake 3.8.2 和自定义构建 Boost 1.64。我将BOOST_ROOTCMake 变量设置为我安装 boost 的前缀。但是，尽管它找到了我的标头，但它仍然不断选择错误的库（系统安装的库）。

我试图调试所有可能的东西，但找不到原因。任何想法为什么 CMake 选择错误的库？

从https://travis-ci.com/Return-To-The-Roots/s25client/builds/96509387：

ls -la "${BOOST_DIR}/lib"
total 37952 drwxr-xr-x  17 travis  staff  578 Jan  5 16:20 . drwxr-xr-x   4 travis  staff       136 Jan  5 16:18 ..
-rw-r--r--   1 travis  staff    259576 Jan  7 18:20 libboost_chrono.a
-rwxr-xr-x   1 travis  staff     18656 Jan  7 18:20 libboost_chrono.dylib
-rwxr-xr-x   1 travis  staff    132152 Jan  7 18:19 libboost_filesystem.dylib
-rwxr-xr-x   1 travis  staff    151976 Jan  7 18:19 libboost_iostreams.dylib
-rwxr-xr-x   1 travis  staff    768636 Jan  7 18:19 libboost_locale.dylib
-rwxr-xr-x   1 travis  staff     82192 Jan  7 18:20 libboost_prg_exec_monitor.dylib
-rwxr-xr-x   1 travis  staff    572724 Jan  7 18:19 libboost_program_options.dylib
-rwxr-xr-x   1 travis  staff   1243824 Jan  7 18:20 libboost_regex.dylib
-rw-r--r--   1 travis  staff    103008 Jan  7 18:20 libboost_system.a
-rwxr-xr-x   1 travis  staff     24932 Jan  7 18:18 libboost_system.dylib
-rw-r--r--   1 travis  staff  14620656 Jan  7 18:21 libboost_test_exec_monitor.a
-rwxr-xr-x   1 travis  staff    160108 Jan  7 18:20 libboost_thread.dylib
-rw-r--r--   1 travis  staff    285880 Jan  7 18:20 libboost_timer.a
-rwxr-xr-x   1 travis  staff     48080 Jan  7 18:20 libboost_timer.dylib
-rwxr-xr-x   1 travis  staff    925444 Jan  7 18:20 libboost_unit_test_framework.dylib

-- [ /Users/travis/build/Return-To-The-Roots/s25client/deps/cmakeosx/share/cmake-3.8/Modules/FindBoost.cmake:1171 ]   _boost_INCLUDE_SEARCH_DIRS = /Users/travis/build/Return-To-The-Roots/s25client/deps/boost1.64.0/include;/Users/travis/build/Return-To-The-Roots/s25client/deps/boost1.64.0;PATHS;C:/boost/include;C:/boost;/sw/local/include
-- [ /Users/travis/build/Return-To-The-Roots/s25client/deps/cmakeosx/share/cmake-3.8/Modules/FindBoost.cmake:1421 ] _boost_LIBRARY_SEARCH_DIRS_RELEASE = /Users/travis/build/Return-To-The-Roots/s25client/deps/boost1.64.0/lib;/Users/travis/build/Return-To-The-Roots/s25client/deps/boost1.64.0/stage/lib;/Users/travis/build/Return-To-The-Roots/s25client/deps/boost1.64.0/include/lib;/Users/travis/build/Return-To-The-Roots/s25client/deps/boost1.64.0/include/../lib;/Users/travis/build/Return-To-The-Roots/s25client/deps/boost1.64.0/include/stage/lib;PATHS;C:/boost/lib;C:/boost;/sw/local/lib_boost_LIBRARY_SEARCH_DIRS_DEBUG
= /Users/travis/build/Return-To-The-Roots/s25client/deps/boost1.64.0/lib;/Users/travis/build/Return-To-The-Roots/s25client/deps/boost1.64.0/stage/lib;/Users/travis/build/Return-To-The-Roots/s25client/deps/boost1.64.0/include/lib;/Users/travis/build/Return-To-The-Roots/s25client/deps/boost1.64.0/include/../lib;/Users/travis/build/Return-To-The-Roots/s25client/deps/boost1.64.0/include/stage/lib;PATHS;C:/boost/lib;C:/boost;/sw/local/lib
-- [ /Users/travis/build/Return-To-The-Roots/s25client/deps/cmakeosx/share/cmake-3.8/Modules/FindBoost.cmake:1567 ] Searching for FILESYSTEM_LIBRARY_RELEASE: boost_filesystem-mt-1_64;boost_filesystem-mt;boost_filesystem
-- [ /Users/travis/build/Return-To-The-Roots/s25client/deps/cmakeosx/share/cmake-3.8/Modules/FindBoost.cmake:365 ]  Boost_LIBRARY_DIR_RELEASE = /usr/local/lib
_boost_LIBRARY_SEARCH_DIRS_RELEASE = /usr/local/lib;NO_DEFAULT_PATH;NO_CMAKE_FIND_ROOT_PATH

Boost_FILESYSTEM_LIBRARY_DEBUG:FILEPATH=/usr/local/lib/libboost_filesystem-mt.a

调查 CMake 3.8.2 的 FindBoost 导致find_library最终被称为：

find_library(result_var
    NAMES boost_filesystem-mt-1_64;boost_filesystem-mt;boost_filesystem
    HINTS /Users/travis/build/Return-To-The-Roots/s25client/deps/boost1.64.0/lib;<more paths>
    NAMES_PER_DIR
    DOC "${_boost_docstring_release}"
    )

如果找到/usr/local/lib/libboost_filesystem-mt.a它，它必须找到我的自定义库，该库位于第一个 HINTS 选项中，并且指定了 NAMES_PER_DIR。我仔细检查了 CMAKE_PREFIX_PATH、CMAKE_LIBRARY_PATH 和 CMAKE_FRAMEWORK_PATH，都是空的。

那么这里发生了什么？

澄清与例如我如何让 CMake 找到我的替代 Boost 安装的区别？：

标签： c++boostcmake

解决方案

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