Linux 下简单的 c 例子
1. write a simple c file waFunc.c
#include<stdio.h>
main()
{
func1();
printf("this is a test\n");
return;
}
void func1()
{
printf("this is func1\n");
}
void func2()
{
printf("this is func2\n");
}
void func3()
{
printf("this is fun3 \n");
}
2. compile this file as file that can be executed
gcc -o waFunc waFunc.c
execute ./waFunc
this is func1
this is a test
3. compile this file as .o file
gcc -c -O waFunc.c
4. write another c file waUtil.c
#include<stdio.h>
void doTest()
{
printf("do test\n");
}
void getName()
{
printf("get name\n");
}
void testConnection()
{
printf("tset connection\n");
}
5. gcc -c -O waUtil.c
6. create a library
ar -qrv libwa_sock.a waUtil.o
7. add waFunc.o to libwa_sock.a
ar -rv libwa_sock.a waUtil.o
8. nm libwa_sock.a
9. write a new c file
#include<stdio.h>
void getMotherName()
{
getName();
printf("get Mother name\n");
}
main()
{
getMotherName();
return;
}
10. compile : gcc -c -O waAPI.c
11. compile dynamic library
gcc -shared -o libwaAPI.so waAPI.o -L./ -lwa_sock
