commit 1f7f7172dcaa9e5e3c1f515e05f06ebafcc2a4fc
author Manuel Pégourié-Gonnard <manuel.pegourie-gonnard@arm.com> Mon Jul 18 12:04:05 2022 +0200
committer Manuel Pégourié-Gonnard <manuel.pegourie-gonnard@arm.com> Mon Jul 18 12:49:20 2022 +0200
tree 160900f184324d99a4f61ec5942635de5f4b6f86
parent 8c7b81cdf9b4cfd2fab471bc695d8a1f40100d23

Document existing dependency of MD_C

Trying to compile MD_C without any of the hash modules would result in a
bunch of unused parameter warning (hence errors in -Werror builds).

We could silence those warnings by casting the parameters to void, but
still, compiling the module in such a configuration would mean all of
its functions are useless (always returning an error).

Seems better to just document the dependency.

Signed-off-by: Manuel Pégourié-Gonnard <manuel.pegourie-gonnard@arm.com>

include/mbedtls/check_config.h

diff --git a/include/mbedtls/check_config.h b/include/mbedtls/check_config.h
index 605f11a..badd14c 100644
--- a/include/mbedtls/check_config.h
+++ b/include/mbedtls/check_config.h
@@ -329,6 +329,17 @@
 #error "!MBEDTLS_SSL_KEEP_PEER_CERTIFICATE requires MBEDTLS_SHA512_C, MBEDTLS_SHA256_C or MBEDTLS_SHA1_C"
 #endif
 
+#if defined(MBEDTLS_MD_C) && !( \
+    defined(MBEDTLS_MD5_C) || \
+    defined(MBEDTLS_RIPEMD160_C) || \
+    defined(MBEDTLS_SHA1_C) || \
+    defined(MBEDTLS_SHA224_C) || \
+    defined(MBEDTLS_SHA256_C) || \
+    defined(MBEDTLS_SHA384_C) || \
+    defined(MBEDTLS_SHA512_C) )
+#error "MBEDTLS_MD_C defined, but not all prerequisites"
+#endif
+
 #if defined(MBEDTLS_MEMORY_BUFFER_ALLOC_C) &&                          \
     ( !defined(MBEDTLS_PLATFORM_C) || !defined(MBEDTLS_PLATFORM_MEMORY) )
 #error "MBEDTLS_MEMORY_BUFFER_ALLOC_C defined, but not all prerequisites"