* configure.ac: Check for stpcpy() support.

* src/misc.c (stpcpy): Define it if not provided.

configure.ac

@@ -133,8 +133,8 @@ AS_IF([test "$ac_cv_func_gettimeofday" = yes],
             [Define to 1 if you have a standard gettimeofday function])
 ])
 
-AC_CHECK_FUNCS([strtoll strdup strndup memrchr mempcpy umask mkstemp mktemp \
-                fdopen dup dup2 getcwd realpath sigsetmask sigaction \
+AC_CHECK_FUNCS([strtoll strdup strndup stpcpy memrchr mempcpy umask mkstemp \
+                mktemp fdopen dup dup2 getcwd realpath sigsetmask sigaction \
                 getgroups seteuid setegid setlinebuf setreuid setregid \
                 getrlimit setrlimit setvbuf pipe strerror strsignal \
                 lstat readlink atexit isatty ttyname pselect posix_spawn \

src/misc.c

@@ -636,6 +636,21 @@ mempcpy (void *dest, const void *src, size_t n)
 }
 #endif
 
+#if !HAVE_STPCPY
+char *
+stpcpy (char *dest, const char *src)
+{
+  char *d = dest;
+  const char *s = src;
+
+  do
+    *d++ = *s;
+  while (*s++ != '\0');
+
+  return d - 1;
+}
+#endif
+
 #if !HAVE_STRTOLL
 # undef UNSIGNED
 # undef USE_NUMBER_GROUPING