undefined symbol: _ZNSt8ios_base4InitD1
[root@localhost usehellolib]# gcc main.cpp -I include/ -L lib/ -lhello -o usehello
/usr/bin/ld: /tmp/cct6c7yF.o: undefined reference to symbol '_ZNSt8ios_base4InitD1Ev@@GLIBCXX_3.4'
//usr/lib64/libstdc++.so.6: error adding symbols: DSO missing from command line
collect2: 錯誤：ld 返回 1
用gcc編譯C++動態庫導致，用g++編譯就好了
[root@localhost usehellolib]# g++ main.cpp -I include/ -L lib/ -lhello -o usehello