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Home > C++ > FAQ C++ > FAQ C++ - gcc/g++ > gcc / g++ find where a header file is included from
To list absolute paths of include files, use
-M
Instead of outputting the result of preprocessing, output a rule suitable for make describing the dependencies of the main source file. The preprocessor outputs one make rule containing the object file name for that source file, a colon, and the names of all the included files, including those coming from -include or -imacros command line options.
gcc -M test.c
If you dont want the system includes like
#include <stdio.h>
then use
-MM
Like -M but do not mention header files that are found in system header directories, nor header files that are included, directly or indirectly, from such a header.
gcc -MM test.c