Move the pure stdlib functions into the new pure directory.

lang/cem/libcc.ansi/build.lua

@@ -34,6 +34,7 @@ for _, plat in ipairs(vars.plats) do
 			"+ctype_files",
 			"+ctype_tab",
 			"./pure/string/*.c",
+			"./pure/stdlib/*.c",
 			"./ctype/*.c",
 			"./errno/*.c",
 			"./locale/*.c",

lang/cem/libcc.ansi/pure/stdlib/setenv.c

@@ -64,7 +64,7 @@ int setenv(register const char* name, register const char* value, int rewrite)
 		environ[cnt + 1] = NULL;
 		offset = cnt;
 	}
-	for (C = name; *C && *C != '='; ++C)
+	for (C = (char*) name; *C && *C != '='; ++C)
 		; /* no `=' in name */
 	if (!(environ[offset] = /* name + `=' + value */
 	        malloc((unsigned)((int)(C - name) + l_value + 2))))