Adapt sources to configurable config.h name
diff --git a/programs/util/pem2der.c b/programs/util/pem2der.c
index a755694..5386fdb 100644
--- a/programs/util/pem2der.c
+++ b/programs/util/pem2der.c
@@ -23,7 +23,11 @@
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
+#if !defined(POLARSSL_CONFIG_FILE)
#include "polarssl/config.h"
+#else
+#include POLARSSL_CONFIG_FILE
+#endif
#include <string.h>
#include <stdlib.h>
diff --git a/programs/util/strerror.c b/programs/util/strerror.c
index 91f5c9e..b56eaae 100644
--- a/programs/util/strerror.c
+++ b/programs/util/strerror.c
@@ -23,7 +23,11 @@
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
+#if !defined(POLARSSL_CONFIG_FILE)
#include "polarssl/config.h"
+#else
+#include POLARSSL_CONFIG_FILE
+#endif
#include <stdlib.h>
#include <string.h>