I have a class in a separate .h file that I never change. Is there a way to only compile this once and not have to do it again? Or is this automatically done for me and I made a pointless post? (Visual C++ 6)
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I have a class in a separate .h file that I never change. Is there a way to only compile this once and not have to do it again? Or is this automatically done for me and I made a pointless post? (Visual C++ 6)
depands on what compiler your using
i use vc++
when i compile a project
it skipps over everything i havent changed since last compile time
If you put it into a .h/.cpp combination then it will only compile it once. If it's in a header, it will compile it every time.
The make program uses a makefile to compile. It only compiles what has changed. And to all of you who use Visual C++, Learn it the hard way! With GCC/G++!
Ah, but no ;)
If you #include "myheader.h" into mysource.cpp, then if myheader.h changes mysource.cpp is recompiled. If you have the class in myheader.h as myclass.h/myclass.cpp and you change myclass.cpp, only that file is recompiled and not mysource.cpp
:confused:
I only have two files, we'll say class.h and source.cpp. If i change source.cpp and not class.h, will class.h still be compiled?
Indirectly, yes. Because class.h is included directly into source.cpp by the preprocessor, compiling source.cpp requires the contents of class.h to be compiled.
Ok. Is there a way to not have to compile it?
Yes. The code sections of the .h file should be split into a .cpp file (the implementation of a class).
MyClass.h = contains definition of the class and its members
MyClass.cpp = contains implementation of the class, needs compiling
main.cpp = includes MyClass.h, if MyClass.h changes then main.cpp is recompiled. If MyClass.cpp changes then MyClass.cpp is recompiled but not main.cpp. If main.cpp is changed MyClass.cpp is not recompiled.