stdout:

stderr:
/home/wangfiox/Documents/database/performance_c/sy/fft1.sy:24:5: warning: incompatible redeclaration of library function 'memmove' [-Wincompatible-library-redeclaration]
int memmove(int dst[], int dst_pos, int src[], int len){
    ^
/home/wangfiox/Documents/database/performance_c/sy/fft1.sy:24:5: note: 'memmove' is a builtin with type 'void *(void *, const void *, unsigned long)'
1 warning generated.

stdout:

stderr:
/home/wangfiox/Documents/database/performance_c/sy/fft1.sy:24:5: warning: incompatible redeclaration of library function 'memmove' [-Wincompatible-library-redeclaration]
int memmove(int dst[], int dst_pos, int src[], int len){
    ^
/home/wangfiox/Documents/database/performance_c/sy/fft1.sy:24:5: note: 'memmove' is a builtin with type 'void *(void *, const void *, unsigned long)'
1 warning generated.