Index: uspace/lib/libc/generic/string.c
===================================================================
--- uspace/lib/libc/generic/string.c	(revision dadcec1dfd773eb63e3a2420db90b31207fcc6a2)
+++ uspace/lib/libc/generic/string.c	(revision 1526594cecdc714a8d598f097949f6f2939ec9fb)
@@ -329,5 +329,6 @@
 	char *orig = dest;
 	
-	while ((*(dest++) = *(src++)));
+	while ((*(dest++) = *(src++)))
+		;
 	return orig;
 }
@@ -337,8 +338,20 @@
 	char *orig = dest;
 	
-	while ((*(dest++) = *(src++)) && --n);
+	while ((*(dest++) = *(src++)) && --n)
+		;
 	return orig;
 }
 
+char *strcat(char *dest, const char *src)
+{
+	char *orig = dest;
+	while (*dest++)
+		;
+	--dest;
+	while ((*dest++ = *src++))
+		;
+	return orig;
+}
+
 /** @}
  */
Index: uspace/lib/libc/include/string.h
===================================================================
--- uspace/lib/libc/include/string.h	(revision dadcec1dfd773eb63e3a2420db90b31207fcc6a2)
+++ uspace/lib/libc/include/string.h	(revision 1526594cecdc714a8d598f097949f6f2939ec9fb)
@@ -40,23 +40,25 @@
 #define bzero(ptr, len)	memset((ptr), 0, (len))
 
-void * memset(void *s, int c, size_t n);
-void * memcpy(void *dest, const void *src, size_t n);
-void * memmove(void *dest, const void *src, size_t n);
+extern void * memset(void *, int, size_t);
+extern void * memcpy(void *, const void *, size_t);
+extern void * memmove(void *, const void *, size_t);
 
-int bcmp(const char *s1, const char *s2, size_t n);
+extern int bcmp(const char *, const char *, size_t);
 
-int strcmp(const char *, const char *);
-int strncmp(const char *, const char *, size_t n);
+extern int strcmp(const char *, const char *);
+extern int strncmp(const char *, const char *, size_t);
 
-char *strcpy(char *dest, const char *src);
-char *strncpy(char *dest, const char *src, size_t n);
+extern char *strcpy(char *, const char *);
+extern char *strncpy(char *, const char *, size_t);
 
-size_t strlen(const char *str);
+extern char *strcat(char *, const char *);
 
-char *strchr(const char *str, int c);
-char *strrchr(const char *str, int c);
+extern size_t strlen(const char *);
 
-long int strtol(const char *nptr, char **endptr, int base);
-unsigned long strtoul(const char *nptr, char **endptr, int base);
+extern char *strchr(const char *, int);
+extern char *strrchr(const char *, int);
+
+extern long int strtol(const char *, char **, int);
+extern unsigned long strtoul(const char *, char **, int);
 
 #endif