Usage of clam.py with multiple files about clam HOT 1 OPEN

For large projects, the way to go is the use of gclang https://github.com/SRI-CSL/gllvm.
gclang allows you to generate a single bitcode file from an arbitrary project as long as it uses standard build systems such as make or cmake.

For instance, for a project that uses make and generates the executable myexecutable, using gclang can be as easy as:

CC=gclang  ./configure
make
make install

And then, just type get-bc myexecutable where myexecutable is in the install directory.
This will generate a file myexecutable.bc that you can pass to clam.py.
The only thing that you have to make sure is that gclang points to clang-14 (see gclang doc for that).
I also typically pass -O1 because clam.py might not like -O2 or -O3 and prefers to do its own optimizations.

CC=gclang  CFLAGS="-O1" ./configure
make
make install

Let me know if you have more questions. I have used gclang many times in the past to analyze multiple real projects and it was really easy 99% of the cases.

from clam.