我正在学习Boost,我的make文件有问题。
这是我的基本makefile:
accesstimer: acctime.o btimer.o
g++ acctime.o btimer.o -o accesstimer
acctime.o: acctime.cpp btimer.h
g++ -c acctime.cpp
bentimer.o: btimer.cpp btimer.h
g++ -c btimer.cpp
当acctime.cpp中没有boost文件系统元素时,ake文件工作正常。
一旦我添加了boost文件系统元素,我显然需要在make文件中引用boost库,这就是我遇到问题的地方。
以下行适用于单个文件编译:
g++ -I /usr/local/boost/boost_1_39_0 boosttest1.cpp -o bt1 /usr/local/boost/boost_1_39_0/stage/lib/libboost_filesystem-gcc41-mt.a /usr/local/boost/boost_1_39_0/stage/lib/libboost_system-gcc41-mt.a
现在我正试图将其集成到make文件中。根据我在网上能找到的信息,我尝试了很多,但都不起作用——这是我的最新信息:
accesstimer: acctime.o bentimer.o
g++ acctime.o bentimer.o -o accesstimer
acctime.o: acctime.cpp bentimer.h
g++ -c -I /usr/local/boost/boost_1_39_0 acctime.cpp /usr/local/boost/boost_1_39_0/stage/lib/libboost_filesystem-gcc41-mt.a /usr/local/boost/boost_1_39_0/stage/lib/libboost_system-gcc41-mt.a
bentimer.o: bentimer.cpp bentimer.h
g++ -c bentimer.cpp
不幸的是,它仍然找不到Boost库,有人能帮忙吗?
谢谢
在阅读了回答者的建议后,我现在明白了:
accesstimer: acctime.o bentimer.o
g++ -L /usr/local/boost/boost_1_39_0 acctime.o /usr/local/boost/boost_1_39_0/stage/lib/libboost_filesystem-gcc41-mt.a /usr/local/boost/boost_1_39_0/stage/lib/libboost_system-gcc41-mt.a bentimer.o -o accesstimer
acctime.o: acctime.cpp bentimer.h
g++ -c acctime.cpp
bentimer.o: bentimer.cpp bentimer.h
g++ -c bentimer.cpp
但这仍然没有联系起来。
这是我收到的错误消息:
g++ -L /usr/local/boost/boost_1_39_0/stage/lib/libboost_filesystem-gcc41-mt.a /usr/local/boost/boost_1_39_0/stage/lib/libboost_system-gcc41-mt.a acctime.o bentimer.o -o accesstimer
acctime.o: In function boost::enable_if<boost::filesystem::is_basic_path<boost::filesystem::basic_path<std::basic_string<char, std::char_traits<char>, std::allocator<char> >, boost::filesystem::path_traits> >, bool>::type boost::filesystem::exists<boost::filesystem::basic_path<std::basic_string<char, std::char_traits<char>, std::allocator<char> >, boost::filesystem::path_traits> >(boost::filesystem::basic_path<std::basic_string<char, std::char_traits<char>, std::allocator<char> >, boost::filesystem::path_traits> const&)':
acctime.cpp:(.text._ZN5boost10filesystem6existsINS0_10basic_pathISsNS0_11path_traitsEEEEENS_9enable_ifINS0_13is_basic_pathIT_EEbE4typeERKS7_[boost::enable_if<boost::filesystem::is_basic_path<boost::filesystem::basic_path<std::basic_string<char, std::char_traits<char>, std::allocator<char> >, boost::filesystem::path_traits> >, bool>::type boost::filesystem::exists<boost::filesystem::basic_path<std::basic_string<char, std::char_traits<char>, std::allocator<char> >, boost::filesystem::path_traits> >(boost::filesystem::basic_path<std::basic_string<char, std::char_traits<char>, std::allocator<char> >, boost::filesystem::path_traits> const&)]+0x26): undefined reference to `boost::filesystem::detail::status_api(std::basic_string<char, std::char_traits<char>, std::allocator<char> > const&, int&)'
collect2: ld returned 1 exit status
make: *** [accesstimer] Error 1
按照奥的建议(谢谢!非常感谢)现在有这个:
accesstimer: acctime.o bentimer.o
g++ -L/usr/local/boost/boost_1_39_0/stage/lib -llibboost_filesystem-gcc41-mt.a -llibboost_system-gcc41-mt.a acctime.o bentimer.o -o accesstimer
acctime.o: acctime.cpp bentimer.h
g++ -c acctime.cpp
bentimer.o: bentimer.cpp bentimer.h
g++ -c bentimer.cpp
看起来好多了,但仍然找不到图书馆:
g++ -L/usr/local/boost/boost_1_39_0/stage/lib -llibboost_filesystem-gcc41-mt.a -llibboost_system-gcc41-mt.a acctime.o bentimer.o -o accesstimer
/usr/bin/ld: cannot find -llibboost_filesystem-gcc41-mt.a
collect2: ld returned 1 exit status
make: *** [accesstimer] Error 1
我已经仔细检查了那个位置,图书馆肯定在:
/usr/local/boost/boost_1_39_0/stage/lib/libboost_filesystem-gcc41-mt.a
我不高兴,现在就用这个:
accesstimer: acctime.o bentimer.o
g++ -L/usr/local/boost/boost_1_39_0 -lboost_filesystem-gcc41-mt acctime.o bentimer.o -o accesstimer
acctime.o: acctime.cpp bentimer.h
g++ -I /usr/local/boost/boost_1_39_0 -c acctime.cpp
bentimer.o: bentimer.cpp bentimer.h
g++ -c bentimer.cpp
正在获取:
g++ -L/usr/local/boost/boost_1_39_0/stage/lib/ -llibboost_filesystem-gcc41-mt acctime.o bentimer.o -o accesstimer
/usr/bin/ld: cannot find -llibboost_filesystem-gcc41-mt
collect2: ld returned 1 exit status
make: *** [accesstimer] Error 1
它的工作原理是:
accesstimer: acctime.o bentimer.o
g++ -L/usr/local/boost/boost_1_39_0/stage/lib -lboost_filesystem acctime.o bentimer.o -o accesstimer
acctime.o: acctime.cpp bentimer.h
g++ -I /usr/local/boost/boost_1_39_0 -c acctime.cpp
bentimer.o: bentimer.cpp bentimer.h
g++ -c bentimer.cpp
谢谢你的帮助
