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Do we need to recompile all libraries after we modify the class?

I have a class that many libraries depend on. If I modify the class
with 'adding an argument with default value to an existing member
function', is it necessary to recompile all library?
How about 'changing destructor into virtual' to the class?
I think we don't need to recompile all library if we only add a
constructor to the class or add a data member to the library.

Jul 11 '06 #1
2 1927
Vols wrote:
I have a class that many libraries depend on. If I modify the class
with 'adding an argument with default value to an existing member
function', is it necessary to recompile all library?
How about 'changing destructor into virtual' to the class?
I think we don't need to recompile all library if we only add a
constructor to the class or add a data member to the library.
You should recompile them, but see this article on reducing
compile-time dependencies:

http://www.gotw.ca/publications/mill04.htm

Cheers! --M

Jul 11 '06 #2
mlimber wrote:
Vols wrote:
>I have a class that many libraries depend on. If I modify the class
with 'adding an argument with default value to an existing member
function', is it necessary to recompile all library?
How about 'changing destructor into virtual' to the class?
I think we don't need to recompile all library if we only add a
constructor to the class or add a data member to the library.

You should recompile them
Your build system (which is off-topic) should recompile them for you, based
on dependency analysis. If you don't have a build system, get one before
doing anything else. C++ doesn't work without a Makefile or something to
manage these dependencies for you.
but see this article on reducing
compile-time dependencies:

http://www.gotw.ca/publications/mill04.htm
Then read /Large Scale C++ Software Design/ by John Lakos, no matter what
the size of your project.

--
Phlip
http://c2.com/cgi/wiki?ZeekLand <-- NOT a blog!!!
Jul 11 '06 #3

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