C code - Find unused functions

minimal tools to find not static unused functions from C code

Required:

• GCC 4.x
• nm (any version)
• find :)

Use:

• add CFLAGS:

  -ffunction-sections -fdata-sections

• add LDFLAGS:

  -Wl,-gc-sections

• (optionals) add to source files:

#include "find-unused-function.h"

and add prefix you export functions: FUNINLINE or FUNEXPORT (Required find-unused-function.h)

example:

 FUNINLINE int fun1(..) { .. }
 FUNEXPORT int fun2(..) { .. }

• edit Makefile, and make source

after run:

   find-unused-function.sh <path/compiled-name.bin> <path/object-dir/*.o> [<path/source-dir/*.c *.h>]

good idea, create link:

   ln -s /usr/bin/find-unused-function.sh /usr/bin/fuf

Result produce files:

   path/object-dir/DebugSymbol/symbols.*