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chapter05/whystatic.xml (modified) (3 diffs)
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chapter05/whystatic.xml
r2d416d6 r76c0b78 7 7 8 8 <para>When making (compiling) a program, rather than having to rewrite all the 9 functions for dealing with the kernel, hardware, files, etc. every time you9 functions for dealing with the kernel, hardware, files, etc. every time you 10 10 write a new program, all these basic functions are instead kept in libraries. 11 11 glibc, which you install later, is one of these major libraries, which contain … … 17 17 18 18 <para>However, these libraries can be very large (for example, libc.a 19 from can often be around 2.5MB), so you may not want a sep erate copy of19 from can often be around 2.5MB), so you may not want a separate copy of 20 20 each library attached to the 21 21 program. Just imagine if you had a simple command like ls with an extra 2.5MB 22 22 attached to it! Instead of making the library an actual part of the 23 program, or Statically Linked, the library is kept a sep erate file,23 program, or Statically Linked, the library is kept a separate file, 24 24 which is loaded only when the program needs it. This is what we call Dynamically 25 25 Linked, as the library is loaded and unloaded dynamically, as the program needs … … 51 51 main set of system libraries, glibc. Once this is made we start rebuilding 52 52 all the programs we just did in Chapter 5, but this time dynamically linked, 53 so that we can take advantage of the space saving opportunit es.</para>53 so that we can take advantage of the space saving opportunities.</para> 54 54 55 55 <para>And there you have it, that's why you need to use those weird
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