添加 boost 文件系统.hpp 无法编译

Question

我的cmake中有文件系统：

find_package(Boost 1.63.0 COMPONENTS program_options system filesystem thread REQUIRED)

当我编译时，它说Found the following Boost libraries，包括filesystem。

一切都编译得很好。但是，一旦我尝试包括：

#include <boost/filesystem.hpp>

我收到以下错误。这是怎么回事？

CMakeFilesrunBasicBrimusTests.dir/objects.a(boost_filesystem_check.cpp.obj):
In function `_static_initialization_and_destruction_0':
 C:/Users/b.karjoo/Documents/boost_1_63_0/boost/system/error_code.hpp:221:
undefined reference to `boost::system::generic_category()'
C:/Users/b.karjoo/Documents/boost_1_63_0/boost/system/error_code.hpp:222:
undefined reference to `boost::system::generic_category()'
C:/Users/b.karjoo/Documents/boost_1_63_0/boost/system/error_code.hpp:223:
undefined reference to `boost::system::system_category()'
collect2.exe: error: ld returned 1 exit status
Brimus-Testbasic_testsCMakeFilesrunBasicBrimusTests.dirbuild.make:910:
recipe for target 'Brimus-Test/basic_tests/runBasicBrimusTests.exe'
failed CMakeFilesMakefile2:293: recipe for target
'Brimus-Test/basic_tests/CMakeFiles/runBasicBrimusTests.dir/all'
failed mingw32-make.exe[3]: ***
[Brimus-Test/basic_tests/runBasicBrimusTests.exe] Error 1
mingw32-make.exe[2]: ***
[Brimus-Test/basic_tests/CMakeFiles/runBasicBrimusTests.dir/all] Error
2 mingw32-make.exe[1]: ***
[Brimus-Test/basic_tests/CMakeFiles/runBasicBrimusTests.dir/rule]
Error 2 CMakeFilesMakefile2:305: recipe for target
'Brimus-Test/basic_tests/CMakeFiles/runBasicBrimusTests.dir/rule'
failed Makefile:169: recipe for target 'runBasicBrimusTests' failed
mingw32-make.exe: *** [runBasicBrimusTests] Error 2

Answer 1

您应该在 cmake 中添加目标链接库。

find_package(Boost 1.63.0 COMPONENTS program_options system filesystem thread 
REQUIRED)
target_link_libraries(mytarget 
  ${Boost_FILESYSTEM_LIBRARY}
  ${Boost_SYSTEM_LIBRARY}
)