configure.ac (ac_libiberty_warn_cflags): Add -Wwrite-strings -Wstrict-prototypes.

[thirdparty/gcc.git] / libiberty / strstr.c

diff --git a/libiberty/strstr.c b/libiberty/strstr.c
index ff8abd20f786add836af29c309109533f0965aba..60902ea40ee80b513a525f9403728398ea876d7e 100644 (file)
--- a/libiberty/strstr.c
+++ b/libiberty/strstr.c
@@ -20,23 +20,22 @@ length, the function returns @var{string}.
 /* FIXME:  The above description is ANSI compiliant.  This routine has not
    been validated to comply with it.  -fnf */
 
+#include <stddef.h>
+
+extern char *strchr (const char *, int);
+extern int strncmp (const void *, const void *, size_t);
+extern size_t strlen (const char *);
+
 char *
-strstr (char *s1, char *s2)
+strstr (const char *s1, const char *s2)
 {
-  register char *p = s1;
-  extern char *strchr ();
-  extern int strncmp ();
-#if __GNUC__ >= 2
-  extern __SIZE_TYPE__ strlen (const char *);
-#endif
-  register int len = strlen (s2);
+  const char *p = s1;
+  const size_t len = strlen (s2);
 
   for (; (p = strchr (p, *s2)) != 0; p++)
     {
       if (strncmp (p, s2, len) == 0)
-       {
-         return (p);
-       }
+       return (char *)p;
     }
   return (0);
 }