Unix Systems Programming: Lab 3 - Static & Shared Libraries

Purpose and Rationale

Resources

FAQ (submission instructions and other useful stuff)

Important Reminder

Lecture 3 is the primary source for this lab.

All work should be done on a machine in the department's Linux cluster. You can refer to ssh for more information on how to log into a remote machine.

Marks Distribution

LAB 3

• EXERCISE 1: Build Static and Shared Libraries using a Makefile
  

  • Read chapters 41 and 42 of Kerrisk, with special focus on chapter 41.
    
    
  • Read "The make Command and Makefiles" session in Chaper 9 of BLP textbook if you're using that text.  Certainly refer to the online GNU documentation for GNU make.
  
  
  • Write 3 very simple c source files: hello.c, here.c, bye.c, mylib.h . In hello.c, a function should print out "Hello!"; in here.c , another function should print out "I am here!"; and yet another function should print out "Bye bye!" in bye.c. So, actually, in each code file, there is only one C printf statement. mylib.h should include prototypes for the 3 functions you will be writing.
    
  • Write a main.c to call above 3 functions so that the result should display like following
    "Hello!"
    "I am here!"
    "Bye bye!"
    Please note there is no C printf statement in main.c;
  
  
  • Read and understand this makefile first and write your own Makefile called Makefile1 to compile them and build a static lib called mylib.a, comprised of hello.c, here.c, and bye.c (but NOT main.c).
    Review "shared libraries naming structure" and "building a shared library" in lecture 3.
  
  
  • Read and understand this makefile first and write your own makefile called Makefile2 to compile them and build a shared lib with the soname of libmylib.so.5.  Make the minor version .1 and the release .10.  This will mean your actual shared library file will be named "libmylib.so.5.1.10" with .so links set accordingly.
    Note that the two makefiles actually build separate libraries based on the same source code files, one static, the other shared.
  
  DELIVERABLES: your source file(s) (e.g., main.c, hello.c, bye.c, here.c, mylib.h), two makefiles, and a README as described below in Deliverables

Deliverables

Carefully follow the steps below.

1. Please create a subdirectory ex, and include eight files
   
   - Five source code files : main.c, hello.c, bye.c, here.c, mylib.h
   - Two Make files, which will build an executable called : main
      Makefile1 : for building static library
      Makefile2 : for building shared library
   - One README file: it will contain two lines, the exact command line argument to build an executable called main
      make -f Makefile1 target
      make -f Makefile2 target
   
   
2. When you are finished with your directory you will create a compressed archive file using tar (this utility stores your directory as a single file, then compresses its size.)
          tar -czvf   username.lab3.tgz   username.lab3
   


3. You will email your file to our TA as an attachment. He will send an acknowledgement that your assignment has been received.
   
   

To	Nicholas Flees (nickflees@uchicago.edu)
Attachment	username.lab3.tgz
Subject	CSPP51081-lab3

---