# cppcheck --version
Cppcheck 1.86

# cppcheck --debug test.cpp -D_LIN_
Checking test.cpp ...
[test.cpp:8]: (error) #error "Product is not specified"

# cat test.cpp
#define __PROD_P1 1

#define PROD(a) __PROD_##a

#if PROD(P1)
#define VER_SHORTPRODUCTNAME_STR "P1"
#else
#error "Product is not specified"
#endif

int main()
{
  return 0;
}

# g++ test.cpp -o test
# ./test
# echo $?
0