Make main 'void', so we can compile with clang. Tidied up definition

of second() a bit.

linpack_accelerate.c

@@ -58,7 +58,6 @@ typedef long LPLONG;
 
 static REAL linpack  (LPLONG nreps,int arsize);
 static void matgen   (REAL *a,int lda,int n,REAL *b,REAL *norma);
-static REAL second   (void);
 
 static void *mempool;
 
@@ -251,6 +250,12 @@ dgesl(REAL *a, LPLONG lda, LPLONG n, LPLONG *ipvt, REAL *b, int job)
 }
 
 
+static double
+second(void)
+{
+    return (double)clock() / CLOCKS_PER_SEC;
+}
+
 static REAL
 linpack(LPLONG nreps, int arsize)
 {
@@ -328,9 +333,3 @@ static void matgen(REAL *a,int lda,int n,REAL *b,REAL *norma)
         for (i = 0; i < n; i++)
             b[i] = b[i] + a[lda*j+i];
 }
-
-static REAL
-second(void)
-{
-    return (REAL)clock() / CLOCKS_PER_SEC;
-}

linpacknew.c

@@ -76,8 +76,8 @@ static REAL second   (void);
 static void *mempool;
 
 
-void main(void)
-
+int
+main(void)
     {
     char    buf[80];
     int     arsize;
@@ -122,6 +122,7 @@ void main(void)
         free(mempool);
         printf("\n");
         }
+        return 0;
     }