Dynamic linking

• Compiling shared libraries
  
  • % gcc -fPIC -c libtriangle.c -o libtriangle.o
    • PIC means "position-independent code."
  • % gcc -shared libtriangle.o -o libtriangle.so
    
• Linking with shared libraries
  • gcc testtriangle.c -L. -ltriangle -o testtriangle
  • Exactly the same as static
    
• Yes, it's dynamically linked

   $ldd testtriangle
                 libtriangle.so => libtriangle.so (0x40018000)
            libc.so.6 => /lib/tls/libc.so.6 (0x4002b000)
            /lib/ld-linux.so.2 => /lib/ld-linux.so.2 (0x40000000)
    

  
  

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