Generating a dependency graph and dependency file

Clang Frontend Using Clang
#1

Hi there.

I am trying to generate a list of include dependencies of a specific cpp file using the option -dependency-file of clang 3.5 on Unbuntu 12.04 LTS. I have tried using it in the following way:

clang++ -MM -dependency-file hello_includes.txt hello.cpp

and

clang++ -MM hello.cpp -Xpreprocessor -dependency-file hello_includes.txt

but have been unable to make it work.

clang: warning: argument unused during compilation: ‘-dependency-file hello_include.txt’

So, I was wondering if this feature is actually supported ? ( I am confused as the it shows up in the clang user help but is not contained in the User Manual ). Thank you for your help.

Regards,
Samrat Roy.

#2

Please use the same option as with GCC:

clang++ -MM hello.cpp

or

clang++ -MM -MF deps.txt hello.cpp

-dependency-file is an internal option and should not be used directly.

Dmitri

#3

+ cfe-users