Backport 2.1:Add configuration file in md.h
include `*config.h*` in md.h as MACROS in the header file get ignored.
Fix for #1001.
diff --git a/ChangeLog b/ChangeLog
index 1d06476..67376cf 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,5 +1,12 @@
mbed TLS ChangeLog (Sorted per branch, date)
+
+= mbed TLS x.x.x branch released xxxx-xx-xx
+
+Bugfix
+ * Include configuration file in md.h, to fix compilation warnings.
+ Reported by aaronmdjones in #1001
+
= mbed TLS 2.1.9 branch released 2017-08-10
Security
diff --git a/include/mbedtls/md.h b/include/mbedtls/md.h
index b902355..00b1e3a 100644
--- a/include/mbedtls/md.h
+++ b/include/mbedtls/md.h
@@ -27,6 +27,12 @@
#include <stddef.h>
+#if !defined(MBEDTLS_CONFIG_FILE)
+#include "config.h"
+#else
+#include MBEDTLS_CONFIG_FILE
+#endif
+
#define MBEDTLS_ERR_MD_FEATURE_UNAVAILABLE -0x5080 /**< The selected feature is not available. */
#define MBEDTLS_ERR_MD_BAD_INPUT_DATA -0x5100 /**< Bad input parameters to function. */
#define MBEDTLS_ERR_MD_ALLOC_FAILED -0x5180 /**< Failed to allocate memory. */