CODEWITHSUNDEEP
c++c
carte blanche
carte blanche

Reputation: 11476

list of all header files included by a C file

I am trying to "arm" compile a C file,it includes lot of header files recursively..i am trying to find the list of these header files..is there a easier way to find the list of all the header files it includes?

Upvotes: 12

Views: 9476

Answers (3)

user2274607
user2274607

Reputation:

As per http://gcc.gnu.org/onlinedocs/gcc/Preprocessor-Options.html#Preprocessor-Options -H and -M option are useful for this purpose.

Another option is to use http://www.doxygen.nl/ and generate documentation of your project, after that you can check it to see file dependencies :), it is preferred because it supports many languages: C, C++, Objective-C, C#, PHP, Java, Python, IDL (Corba and Microsoft flavors), FORTRAN, VHDL, Tcl.

Upvotes: 2

piokuc
piokuc

Reputation: 26164

You can use the GCC C preprocessor with it's option to dump a list of headers recursively included:

cpp -M

That will show you all headers included.

You will probably need to give it the roots of all include directories used in your regular build. Run it iteratively, adding more include paths until the errors stop.

The full form of this command in this usage is:

cpp -M [-I include_directory *] path_to_c_file.c

Upvotes: 15

Martin Prikryl
Martin Prikryl

Reputation: 202098

Most compilers have switch to make them just preprocess the file. What means among other that they expand all #include's into an actual code. And usually they do include a comment (proper C comment) on the line of original include. So you can then search the resulting preprocessed code for all such comments to collect all included headers.

Upvotes: 0

Related Questions