boost庫鏈接出錯怎么辦

這篇文章將為大家詳細講解有關boost庫鏈接出錯怎么辦，小編覺得挺實用的，因此分享給大家做個參考，希望大家閱讀完這篇文章后可以有所收獲。

安裝完最新的Boost庫

官方說明中有一句話：

Finally,

$ ./b2 install
will leave Boost binaries in the lib/ subdirectory of your installation prefix. You will also find a copy of the Boost headers in the include/ subdirectory of the installation prefix, so you can henceforth use that directory as an #include path in place of the Boost root directory.

大部分Boost庫無需動態或靜態編譯鏈接，小部分如regex   thread   coroutine之類的庫在編譯自己的源代碼時需要加入鏈接提示

比如在編譯使用regex的庫時命令如下：

c++ -I /usr/local/include/boost/ main.cpp -o test1 -L /usr/local/lib -lboost_regex

完成后運行時：

LD_LIBRARY_PATH="/usr/local/lib" ./test1  

否則會報錯：

error while loading shared libraries: libboost_regex.so.1.64.0: cannot open shared object file: No such file or directory

這個錯誤在stackoverflow上給的解釋是：

The library cannot be found.

Libraries are by default looked for in /lib, /usr/lib and the directories specified by /etc/ld.so.conf.

Usually system libraries (like boost, if you installed it via your package manager) are located in /usr/lib, but it's probably not your case.

Where are your boost libraries located on your system? Did you compile them by yourself? In this case you should tell the dynamic linker to look for your libraries in the directory they're located by using the LD_LIBRARY_PATH environment variable:

LD_LIBRARY_PATH="your/boost/directory" ./testfgci
I'd suggest you to install boost libraries using your package manager, anyway, this will make your life a lot simpler.

也就是說系統在運行程序時要先加載動態庫，系統的搜尋目錄在/etc/ld.so.conf或者/etc/ld.so.conf.d/*.conf中，而該目錄中沒有鏈接庫所在的位置，要在該文件中手動加入目錄地址或者在運行程序之前指定LD_LIBRARY_PATH的值

這樣才能正確識別動態庫

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