How static linking is done in C?

Static Linking:
Let us consider math.c file. We want to make it as a static library.
First we compile it with position independent flag on(-fPIC). This is needed for dynamic/static linking.
$cc -fPIC -c math.c

Now make a archive or static lib with the object file.
$ar rc libmath.a math.o

To use this static library in a application we need to do the following steps:

1. compile the application code (place math.h in include folder)
   $cc -c app.c -Iinclude -o app.o
   
2. Link with static library math.a
   $ld app.o libmath.a -o app
   
3. Run the application
   $./app

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