Replace alloca with xmalloc/free

	PR binutils/14526
	* argv.c (buildargv): Replace alloca with xmalloc/free.

From-SVN: r190766

libiberty/ChangeLog

+2011-08-28  H.J. Lu  <hongjiu.lu@intel.com>
+
+	PR binutils/14526
+	* argv.c (buildargv): Replace alloca with xmalloc/free.
+
 2012-08-17  Andreas Schwab  <schwab@linux-m68k.org>
 
 	* floatformat.c (floatformat_to_double): Correctly handle numbers

libiberty/argv.c

@@ -191,7 +191,7 @@ char **buildargv (const char *input)
 
   if (input != NULL)
     {
-      copybuf = (char *) alloca (strlen (input) + 1);
+      copybuf = (char *) xmalloc (strlen (input) + 1);
       /* Is a do{}while to always execute the loop once.  Always return an
 	 argv, even for null strings.  See NOTES above, test case below. */
       do
@@ -297,6 +297,8 @@ char **buildargv (const char *input)
 	  consume_whitespace (&input);
 	}
       while (*input != EOS);
+
+      free (copybuf);
     }
   return (argv);
 }