Analyse following RPM build log snippet. Describe contents accurately, without speculation or suggestions for resolution.            
Your analysis must be as concise as possible, while keeping relevant information intact.
Snippet: 
./src/lpcini.c:54:23: warning: conflicting types for built-in function ‘malloc’; expected ‘void *(long unsigned int)’ [-Wbuiltin-declaration-mismatch]
   54 |         extern void * malloc();
      |                       ^~~~~~
./src/lpcini.c:48:1: note: ‘malloc’ is declared in header ‘<stdlib.h>’
   47 | #include "f2c.h"
  +++ |+#include <stdlib.h>
This snippet shows the header where the function is declared and states that the declaration is different.