Creation of Static Libraries In Linux Simple Steps

Here is real time example of creation of static library and its usage, explained in simple steps.
Creation of static library with example

Creation of Static Libraries In Linux Simple Steps

1. Create Test  Directory
  Create working test directory as: /home/test/so
 
 2. Choose Library Files
   library file name: add.c
     int add(int a, int b)
     {
         return (a+b);
     }
3. Compile
Now Compile Static Library with -shared option
   gcc -c add.c
   gcc -shared -o libadd.so add.o
 
4. Usage of Static Library
 Here is example application uses this library.
   filename: main.c
   int main(void)
   {
      printf("result: %d", add(1,2));
      return 0;
   }
 
5. Compile Example Code
  gcc main.c -o main -L  <path where the library file is there, in our example it is libadd.so> -l add
       (in last option -l add we have to specify library name. name of the library is, removing the "lib"
         from libadd. i.e. how gcc takes.)
   example: gcc main.c -o main -L /home/test/so -ladd
 
6. export LD_LIBRARY_PATH=<directory where your .so file is>
    if you copy the .so file to /lib  directory no need to set this environment variable

Tags static library, Linux, My Notes, C Programs, Embedded Linux.