First: We need to know the characteristics of dynamic and static libraries of
static library: .a
dynamic library: .so
common libadd.a libadd.so
dynamic libraries: the goal compiled into a special binary program itself can not be executed directly, but can be called scene: the client only update a module more
static link library: to generate a series of special binary file with the .o file itself can not be executed, but others can be a .c file compiled into a new executable program
Build a dynamic library
In fact, the above code can simply write for the general dependence but generate static library that the use of a large number of dependent role becomes more important, others can use your .a file directly,
To look at the dynamic of
We do not see libadd.so but the target file can be used to perform
Building a dynamic library of commands: gcc -test.c -shared -fPIC -o libadd.so
ldd 可以查看一个可执行程序依赖了哪些动态库
LD_LIBRARAY_PATH 设定环境变量 去提醒系统去哪找
C ++ source code of third-party libraries need to be compiled into a static library / dynamic library to use because of environmental differences compilation, this process is not sincere pain
