unused-funcs
Clang-based standalone tool that detects unused external functions in a set of source files.
GPL-2.0 License
Stars
14
Ecosystems:
C++
Note
The code was "modernized" (the term is too ambiguous and subjective to take it seriously) and thus has slightly diverged from the way it's presented in the post. Original tree that corresponds to the text can be browsed here.
Brief description
Clang-based standalone tool that diagnoses the following cases of defining functions:
- completely unused functions declared as
extern; - functions declared as
externwhich are used only locally and thus can be
madestatic.
Example
Input:
static void firstStatic(void);
static void secondStatic(void);
void firstExtern(void);
extern void secondExtern(void);
static void firstStatic(void) { }
static void secondStatic(void) { }
void firstExtern(void) { }
void secondExtern(void) { }
int
main(void)
{
firstExtern();
secondStatic();
return 0;
}
Run command:
bin/unused-funcs main.c --
Output (paths are truncated):
.../main.c:20:firstExtern:can be made static
.../main.c:25:secondExtern:unused
Building
- Clone the repository to
llvm/tools/clang/tools/extra. - Add
add_subdirectory(unused-funcs)toCMakeLists.txtin the same
directory. - Run
ninja unused-funcsinside your LLVM'sbuild/directory.