CODEWITHSUNDEEP
c++makefileg++
JDN
JDN

Reputation: 519

How do you compile just a .h file in a makefile?

I have a makefile that creates object files for two classes (and main) and one of those classes is just defined in a .h file. In my makefile I have a line that says

FileName.o: FileName.h
  g++ -c FileName.h

but when I try to compile it says it can't find FileName.o

Do I have to create FileName.cpp in order to get this to compile?

Upvotes: 5

Views: 13083

Answers (2)

Steed
Steed

Reputation: 1300

You are using your class from FileName.h somewhere, aren't you? So at least one of your .cpp files should contain #include "FileName.h", and .h's code will be compiled with this .cpp and you needn't compile .h's code separately.

Upvotes: 7

Jerry Coffin
Jerry Coffin

Reputation: 490693

You don't normally attempt to compile a header (.h) file by itself. Including it into an otherwise empty .cpp file will let you compile it and produce a .o file, but it probably won't do much (if any) real good unless you've put things in the header that don't really belong in a header.

Upvotes: 6

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