c++ - OSX 上的 CMake 和 Boost - 没有制定目标的规则

Question

我正在使用 CMake 使用 Qt5、Boost 和其他库构建我的应用程序。我在 Ubuntu 上开发时一切顺利，现在我试图让我的代码也在 OSX 上构建和运行，但遇到了一些问题。

库文件在，其他地方有问题。

我认为相关的主要 CMakeLists.txt 部分:

project(lillebror)
cmake_minimum_required(VERSION 2.8)
cmake_policy(SET CMP0015 NEW)

set(Boost_USE_STATIC_LIBS ON)
set(Boost_USE_MULTITHREADED ON)
set(Boost_USE_STATIC_RUNTIME OFF)

find_package(Boost 1.54 COMPONENTS date_time log thread system unit_test_framework REQUIRED)

add_subdirectory(core)
add_subdirectory(server)

服务器/CMakeLists.txt

aux_source_directory(. SRC_LIST)
add_executable(server ${SRC_LIST})
target_link_libraries(server core ${Boost_LIBRARIES})

然而，当我运行它时，我得到了这个错误:

make[2]: *** No rule to make target `/usr/local/lib/libboost_date_time-mt.a', needed by `server/server'.  Stop.

我在 server/CMakeLists.txt 中添加了一条消息(${Boost_Libraries})并得到了这个输出:

/usr/local/lib/libboost_date_time-mt.a/usr/local/lib/libboost_log.a/usr/local/lib/libboost_thread-mt.a/usr/local/lib/libboost_system-mt.a/usr/local/lib/libboost_unit_test_framework-mt.a

cmake 输出的开头如下所示:

-- Boost version: 1.54.0
-- Found the following Boost libraries:
--   date_time
--   log
--   thread
--   system
--   unit_test_framework

CMake 版本 2.8.12.1OSX 10.9.2

VERBOSE=1 在构建/服务器中生成的输出:

cd /Users/dutt/workspace/lillebror/build && "/Applications/CMake 2.8-12.app/Contents/bin/cmake" -H/Users/dutt/workspace/lillebror -B/Users/dutt/workspace/lillebror/build --check-build-system CMakeFiles/Makefile.cmake 0
cd /Users/dutt/workspace/lillebror/build && "/Applications/CMake 2.8-12.app/Contents/bin/cmake" -E cmake_progress_start /Users/dutt/workspace/lillebror/build/CMakeFiles /Users/dutt/workspace/lillebror/build/server/CMakeFiles/progress.marks
cd /Users/dutt/workspace/lillebror/build && /Applications/Xcode.app/Contents/Developer/usr/bin/make -f CMakeFiles/Makefile2 server/all
/Applications/Xcode.app/Contents/Developer/usr/bin/make -f messages/CMakeFiles/messages.dir/build.make messages/CMakeFiles/messages.dir/depend
cd /Users/dutt/workspace/lillebror/build && "/Applications/CMake 2.8-12.app/Contents/bin/cmake" -E cmake_depends "Unix Makefiles" /Users/dutt/workspace/lillebror /Users/dutt/workspace/lillebror/messages /Users/dutt/workspace/lillebror/build /Users/dutt/workspace/lillebror/build/messages /Users/dutt/workspace/lillebror/build/messages/CMakeFiles/messages.dir/DependInfo.cmake --color=
/Applications/Xcode.app/Contents/Developer/usr/bin/make -f messages/CMakeFiles/messages.dir/build.make messages/CMakeFiles/messages.dir/build
make[2]: Nothing to be done for `messages/CMakeFiles/messages.dir/build'.
"/Applications/CMake 2.8-12.app/Contents/bin/cmake" -E cmake_progress_report /Users/dutt/workspace/lillebror/build/CMakeFiles  14 15
[ 28%] Built target messages
/Applications/Xcode.app/Contents/Developer/usr/bin/make -f core/CMakeFiles/core.dir/build.make core/CMakeFiles/core.dir/depend
cd /Users/dutt/workspace/lillebror/build && "/Applications/CMake 2.8-12.app/Contents/bin/cmake" -E cmake_depends "Unix Makefiles" /Users/dutt/workspace/lillebror /Users/dutt/workspace/lillebror/core /Users/dutt/workspace/lillebror/build /Users/dutt/workspace/lillebror/build/core /Users/dutt/workspace/lillebror/build/core/CMakeFiles/core.dir/DependInfo.cmake --color=
/Applications/Xcode.app/Contents/Developer/usr/bin/make -f core/CMakeFiles/core.dir/build.make core/CMakeFiles/core.dir/build
make[2]: Nothing to be done for `core/CMakeFiles/core.dir/build'.
"/Applications/CMake 2.8-12.app/Contents/bin/cmake" -E cmake_progress_report /Users/dutt/workspace/lillebror/build/CMakeFiles  3 4 5 6
[ 85%] Built target core
/Applications/Xcode.app/Contents/Developer/usr/bin/make -f server/CMakeFiles/server.dir/build.make server/CMakeFiles/server.dir/depend
cd /Users/dutt/workspace/lillebror/build && "/Applications/CMake 2.8-12.app/Contents/bin/cmake" -E cmake_depends "Unix Makefiles" /Users/dutt/workspace/lillebror /Users/dutt/workspace/lillebror/server /Users/dutt/workspace/lillebror/build /Users/dutt/workspace/lillebror/build/server /Users/dutt/workspace/lillebror/build/server/CMakeFiles/server.dir/DependInfo.cmake --color=
/Applications/Xcode.app/Contents/Developer/usr/bin/make -f server/CMakeFiles/server.dir/build.make server/CMakeFiles/server.dir/build
"/Applications/CMake 2.8-12.app/Contents/bin/cmake" -E cmake_progress_report /Users/dutt/workspace/lillebror/build/CMakeFiles 17
[100%] Building CXX object server/CMakeFiles/server.dir/main.cpp.o
cd /Users/dutt/workspace/lillebror/build/server && /usr/bin/c++    -g -O0 -fno-inline -fprofile-arcs -ftest-coverage -D__GLIBCXX_DEBUG -I/Users/dutt/workspace/lillebror/build/messages -I/Users/dutt/workspace/lillebror/core    -std=c++11 -o CMakeFiles/server.dir/main.cpp.o -c /Users/dutt/workspace/lillebror/server/main.cpp
make[2]: *** No rule to make target `/usr/local/lib/libboost_date_time-mt.a', needed by `server/server'.  Stop.
make[1]: *** [server/CMakeFiles/server.dir/all] Error 2
make: *** [all] Error 2

我在 build/server/... 中搜索“日期”并找到这个:

server/CMakeFiles/server.dir/link.txt:/usr/bin/c++   -g -O0 -fno-inline -fprofile-arcs -ftest-coverage -D__GLIBCXX_DEBUG -Wl,-search_paths_first -Wl,-headerpad_max_install_names    --coverage CMakeFiles/server.dir/main.cpp.o  -o server  ../core/libcore.a /usr/local/lib/libboost_date_time-mt.a /usr/local/lib/libboost_log.a /usr/local/lib/libboost_thread-mt.a /usr/local/lib/libboost_system-mt.a /usr/local/lib/libboost_unit_test_framework-mt.a ../messages/libmessages.a /usr/local/lib/libboost_date_time-mt.a /usr/local/lib/libboost_log.a /usr/local/lib/libboost_thread-mt.a /usr/local/lib/libboost_system-mt.a /usr/local/lib/libboost_unit_test_framework-mt.a /usr/local/lib/libprotobuf.dylib 

所以它似乎也包含在链接步骤中。他们在那里分开。

Answer 1

原来文件不存在。这是一个不存在的文件的符号链接(symbolic link)，我的 boost 安装中的某些东西是错误的。

教训:不要只检查文件是否存在，还要检查符号链接(symbolic link)。