diff --git a/include/polarssl/config.h b/include/polarssl/config.h
index 002d245..500d041 100644
--- a/include/polarssl/config.h
+++ b/include/polarssl/config.h
@@ -2115,297 +2115,6 @@
 
 /* \} name SECTION: Module configuration options */
 
-/**
- * \name SECTION: Sanity checks
- *
- * Sanity checks on defines and dependencies
- */
-#if defined(POLARSSL_AESNI_C) && !defined(POLARSSL_HAVE_ASM)
-#error "POLARSSL_AESNI_C defined, but not all prerequisites"
-#endif
+#include "check_config.h"
 
-#if defined(POLARSSL_CERTS_C) && !defined(POLARSSL_PEM_PARSE_C)
-#error "POLARSSL_CERTS_C defined, but not all prerequisites"
-#endif
-
-#if defined(POLARSSL_CTR_DRBG_C) && !defined(POLARSSL_AES_C)
-#error "POLARSSL_CTR_DRBG_C defined, but not all prerequisites"
-#endif
-
-#if defined(POLARSSL_DHM_C) && !defined(POLARSSL_BIGNUM_C)
-#error "POLARSSL_DHM_C defined, but not all prerequisites"
-#endif
-
-#if defined(POLARSSL_ECDH_C) && !defined(POLARSSL_ECP_C)
-#error "POLARSSL_ECDH_C defined, but not all prerequisites"
-#endif
-
-#if defined(POLARSSL_ECDSA_C) &&            \
-    ( !defined(POLARSSL_ECP_C) ||           \
-      !defined(POLARSSL_ASN1_PARSE_C) ||    \
-      !defined(POLARSSL_ASN1_WRITE_C) )
-#error "POLARSSL_ECDSA_C defined, but not all prerequisites"
-#endif
-
-#if defined(POLARSSL_ECDSA_DETERMINISTIC) && !defined(POLARSSL_HMAC_DRBG_C)
-#error "POLARSSL_ECDSA_DETERMINISTIC defined, but not all prerequisites"
-#endif
-
-#if defined(POLARSSL_ECP_C) && ( !defined(POLARSSL_BIGNUM_C) || (   \
-    !defined(POLARSSL_ECP_DP_SECP192R1_ENABLED) &&                  \
-    !defined(POLARSSL_ECP_DP_SECP224R1_ENABLED) &&                  \
-    !defined(POLARSSL_ECP_DP_SECP256R1_ENABLED) &&                  \
-    !defined(POLARSSL_ECP_DP_SECP384R1_ENABLED) &&                  \
-    !defined(POLARSSL_ECP_DP_SECP521R1_ENABLED) &&                  \
-    !defined(POLARSSL_ECP_DP_BP256R1_ENABLED)   &&                  \
-    !defined(POLARSSL_ECP_DP_BP384R1_ENABLED)   &&                  \
-    !defined(POLARSSL_ECP_DP_BP512R1_ENABLED)   &&                  \
-    !defined(POLARSSL_ECP_DP_M255_ENABLED)      &&                  \
-    !defined(POLARSSL_ECP_DP_SECP192K1_ENABLED) &&                  \
-    !defined(POLARSSL_ECP_DP_SECP224K1_ENABLED) &&                  \
-    !defined(POLARSSL_ECP_DP_SECP256K1_ENABLED) ) )
-#error "POLARSSL_ECP_C defined, but not all prerequisites"
-#endif
-
-#if defined(POLARSSL_ENTROPY_C) && (!defined(POLARSSL_SHA512_C) &&      \
-                                    !defined(POLARSSL_SHA256_C))
-#error "POLARSSL_ENTROPY_C defined, but not all prerequisites"
-#endif
-#if defined(POLARSSL_ENTROPY_C) && defined(POLARSSL_SHA512_C) &&         \
-    defined(POLARSSL_CONFIG_OPTIONS) && (CTR_DRBG_ENTROPY_LEN > 64)
-#error "CTR_DRBG_ENTROPY_LEN value too high"
-#endif
-#if defined(POLARSSL_ENTROPY_C) &&                                            \
-    ( !defined(POLARSSL_SHA512_C) || defined(POLARSSL_ENTROPY_FORCE_SHA256) ) \
-    && defined(POLARSSL_CONFIG_OPTIONS) && (CTR_DRBG_ENTROPY_LEN > 32)
-#error "CTR_DRBG_ENTROPY_LEN value too high"
-#endif
-#if defined(POLARSSL_ENTROPY_C) && \
-    defined(POLARSSL_ENTROPY_FORCE_SHA256) && !defined(POLARSSL_SHA256_C)
-#error "POLARSSL_ENTROPY_FORCE_SHA256 defined, but not all prerequisites"
-#endif
-
-#if defined(POLARSSL_GCM_C) && (                                        \
-        !defined(POLARSSL_AES_C) && !defined(POLARSSL_CAMELLIA_C) )
-#error "POLARSSL_GCM_C defined, but not all prerequisites"
-#endif
-
-#if defined(POLARSSL_HAVEGE_C) && !defined(POLARSSL_TIMING_C)
-#error "POLARSSL_HAVEGE_C defined, but not all prerequisites"
-#endif
-
-#if defined(POLARSSL_HMAC_DRBG) && !defined(POLARSSL_MD_C)
-#error "POLARSSL_HMAC_DRBG_C defined, but not all prerequisites"
-#endif
-
-#if defined(POLARSSL_KEY_EXCHANGE_ECDH_ECDSA_ENABLED) &&                 \
-    ( !defined(POLARSSL_ECDH_C) || !defined(POLARSSL_X509_CRT_PARSE_C) )
-#error "POLARSSL_KEY_EXCHANGE_ECDH_ECDSA_ENABLED defined, but not all prerequisites"
-#endif
-
-#if defined(POLARSSL_KEY_EXCHANGE_ECDH_RSA_ENABLED) &&                 \
-    ( !defined(POLARSSL_ECDH_C) || !defined(POLARSSL_X509_CRT_PARSE_C) )
-#error "POLARSSL_KEY_EXCHANGE_ECDH_RSA_ENABLED defined, but not all prerequisites"
-#endif
-
-#if defined(POLARSSL_KEY_EXCHANGE_DHE_PSK_ENABLED) && !defined(POLARSSL_DHM_C)
-#error "POLARSSL_KEY_EXCHANGE_DHE_PSK_ENABLED defined, but not all prerequisites"
-#endif
-
-#if defined(POLARSSL_KEY_EXCHANGE_ECDHE_PSK_ENABLED) &&                     \
-    !defined(POLARSSL_ECDH_C)
-#error "POLARSSL_KEY_EXCHANGE_ECDHE_PSK_ENABLED defined, but not all prerequisites"
-#endif
-
-#if defined(POLARSSL_KEY_EXCHANGE_DHE_RSA_ENABLED) &&                   \
-    ( !defined(POLARSSL_DHM_C) || !defined(POLARSSL_RSA_C) ||           \
-      !defined(POLARSSL_X509_CRT_PARSE_C) || !defined(POLARSSL_PKCS1_V15) )
-#error "POLARSSL_KEY_EXCHANGE_DHE_RSA_ENABLED defined, but not all prerequisites"
-#endif
-
-#if defined(POLARSSL_KEY_EXCHANGE_ECDHE_RSA_ENABLED) &&                 \
-    ( !defined(POLARSSL_ECDH_C) || !defined(POLARSSL_RSA_C) ||          \
-      !defined(POLARSSL_X509_CRT_PARSE_C) || !defined(POLARSSL_PKCS1_V15) )
-#error "POLARSSL_KEY_EXCHANGE_ECDHE_RSA_ENABLED defined, but not all prerequisites"
-#endif
-
-#if defined(POLARSSL_KEY_EXCHANGE_ECDHE_ECDSA_ENABLED) &&                 \
-    ( !defined(POLARSSL_ECDH_C) || !defined(POLARSSL_ECDSA_C) ||          \
-      !defined(POLARSSL_X509_CRT_PARSE_C) )
-#error "POLARSSL_KEY_EXCHANGE_ECDHE_ECDSA_ENABLED defined, but not all prerequisites"
-#endif
-
-#if defined(POLARSSL_KEY_EXCHANGE_RSA_PSK_ENABLED) &&                   \
-    ( !defined(POLARSSL_RSA_C) || !defined(POLARSSL_X509_CRT_PARSE_C) ||\
-      !defined(POLARSSL_PKCS1_V15) )
-#error "POLARSSL_KEY_EXCHANGE_RSA_PSK_ENABLED defined, but not all prerequisites"
-#endif
-
-#if defined(POLARSSL_KEY_EXCHANGE_RSA_ENABLED) &&                       \
-    ( !defined(POLARSSL_RSA_C) || !defined(POLARSSL_X509_CRT_PARSE_C) ||\
-      !defined(POLARSSL_PKCS1_V15) )
-#error "POLARSSL_KEY_EXCHANGE_RSA_ENABLED defined, but not all prerequisites"
-#endif
-
-#if defined(POLARSSL_MEMORY_BUFFER_ALLOC_C) &&                          \
-    ( !defined(POLARSSL_PLATFORM_C) || !defined(POLARSSL_PLATFORM_MEMORY) )
-#error "POLARSSL_MEMORY_BUFFER_ALLOC_C defined, but not all prerequisites"
-#endif
-
-#if defined(POLARSSL_PADLOCK_C) && !defined(POLARSSL_HAVE_ASM)
-#error "POLARSSL_PADLOCK_C defined, but not all prerequisites"
-#endif
-
-#if defined(POLARSSL_PBKDF2_C) && !defined(POLARSSL_MD_C)
-#error "POLARSSL_PBKDF2_C defined, but not all prerequisites"
-#endif
-
-#if defined(POLARSSL_PEM_PARSE_C) && !defined(POLARSSL_BASE64_C)
-#error "POLARSSL_PEM_PARSE_C defined, but not all prerequisites"
-#endif
-
-#if defined(POLARSSL_PEM_WRITE_C) && !defined(POLARSSL_BASE64_C)
-#error "POLARSSL_PEM_WRITE_C defined, but not all prerequisites"
-#endif
-
-#if defined(POLARSSL_PK_PARSE_C) && !defined(POLARSSL_PK_C)
-#error "POLARSSL_PK_PARSE_C defined, but not all prerequisites"
-#endif
-
-#if defined(POLARSSL_PK_WRITE_C) && !defined(POLARSSL_PK_C)
-#error "POLARSSL_PK_WRITE_C defined, but not all prerequisites"
-#endif
-
-#if defined(POLARSSL_PKCS11_C) && !defined(POLARSSL_PK_C)
-#error "POLARSSL_PKCS11_C defined, but not all prerequisites"
-#endif
-
-#if defined(POLARSSL_RSA_C) && ( !defined(POLARSSL_BIGNUM_C) ||         \
-    !defined(POLARSSL_OID_C) )
-#error "POLARSSL_RSA_C defined, but not all prerequisites"
-#endif
-
-#if defined(POLARSSL_SSL_PROTO_SSL3) && ( !defined(POLARSSL_MD5_C) ||     \
-    !defined(POLARSSL_SHA1_C) )
-#error "POLARSSL_SSL_PROTO_SSL3 defined, but not all prerequisites"
-#endif
-
-#if defined(POLARSSL_SSL_PROTO_TLS1) && ( !defined(POLARSSL_MD5_C) ||     \
-    !defined(POLARSSL_SHA1_C) )
-#error "POLARSSL_SSL_PROTO_TLS1 defined, but not all prerequisites"
-#endif
-
-#if defined(POLARSSL_SSL_PROTO_TLS1_1) && ( !defined(POLARSSL_MD5_C) ||     \
-    !defined(POLARSSL_SHA1_C) )
-#error "POLARSSL_SSL_PROTO_TLS1_1 defined, but not all prerequisites"
-#endif
-
-#if defined(POLARSSL_SSL_PROTO_TLS1_2) && ( !defined(POLARSSL_SHA1_C) &&     \
-    !defined(POLARSSL_SHA256_C) && !defined(POLARSSL_SHA512_C) )
-#error "POLARSSL_SSL_PROTO_TLS1_2 defined, but not all prerequisites"
-#endif
-
-#if defined(POLARSSL_SSL_CLI_C) && !defined(POLARSSL_SSL_TLS_C)
-#error "POLARSSL_SSL_CLI_C defined, but not all prerequisites"
-#endif
-
-#if defined(POLARSSL_SSL_TLS_C) && ( !defined(POLARSSL_CIPHER_C) ||     \
-    !defined(POLARSSL_MD_C) )
-#error "POLARSSL_SSL_TLS_C defined, but not all prerequisites"
-#endif
-
-#if defined(POLARSSL_SSL_SRV_C) && !defined(POLARSSL_SSL_TLS_C)
-#error "POLARSSL_SSL_SRV_C defined, but not all prerequisites"
-#endif
-
-#if defined(POLARSSL_SSL_TLS_C) && (!defined(POLARSSL_SSL_PROTO_SSL3) && \
-    !defined(POLARSSL_SSL_PROTO_TLS1) && !defined(POLARSSL_SSL_PROTO_TLS1_1) && \
-    !defined(POLARSSL_SSL_PROTO_TLS1_2))
-#error "POLARSSL_SSL_TLS_C defined, but no protocols are active"
-#endif
-
-#if defined(POLARSSL_SSL_TLS_C) && (defined(POLARSSL_SSL_PROTO_SSL3) && \
-    defined(POLARSSL_SSL_PROTO_TLS1_1) && !defined(POLARSSL_SSL_PROTO_TLS1))
-#error "Illegal protocol selection"
-#endif
-
-#if defined(POLARSSL_SSL_TLS_C) && (defined(POLARSSL_SSL_PROTO_TLS1) && \
-    defined(POLARSSL_SSL_PROTO_TLS1_2) && !defined(POLARSSL_SSL_PROTO_TLS1_1))
-#error "Illegal protocol selection"
-#endif
-
-#if defined(POLARSSL_SSL_TLS_C) && (defined(POLARSSL_SSL_PROTO_SSL3) && \
-    defined(POLARSSL_SSL_PROTO_TLS1_2) && (!defined(POLARSSL_SSL_PROTO_TLS1) || \
-    !defined(POLARSSL_SSL_PROTO_TLS1_1)))
-#error "Illegal protocol selection"
-#endif
-
-#if defined(POLARSSL_SSL_SESSION_TICKETS) && defined(POLARSSL_SSL_TLS_C) && \
-    ( !defined(POLARSSL_AES_C) || !defined(POLARSSL_SHA256_C) ||            \
-      !defined(POLARSSL_CIPHER_MODE_CBC) )
-#error "POLARSSL_SSL_SESSION_TICKETS_C defined, but not all prerequisites"
-#endif
-
-#if defined(POLARSSL_SSL_SERVER_NAME_INDICATION) && \
-        !defined(POLARSSL_X509_CRT_PARSE_C)
-#error "POLARSSL_SSL_SERVER_NAME_INDICATION defined, but not all prerequisites"
-#endif
-
-#if defined(POLARSSL_THREADING_PTHREAD)
-#if !defined(POLARSSL_THREADING_C) || defined(POLARSSL_THREADING_IMPL)
-#error "POLARSSL_THREADING_PTHREAD defined, but not all prerequisites"
-#endif
-#define POLARSSL_THREADING_IMPL
-#endif
-
-#if defined(POLARSSL_THREADING_ALT)
-#if !defined(POLARSSL_THREADING_C) || defined(POLARSSL_THREADING_IMPL)
-#error "POLARSSL_THREADING_ALT defined, but not all prerequisites"
-#endif
-#define POLARSSL_THREADING_IMPL
-#endif
-
-#if defined(POLARSSL_THREADING_C) && !defined(POLARSSL_THREADING_IMPL)
-#error "POLARSSL_THREADING_C defined, single threading implementation required"
-#endif
-#undef POLARSSL_THREADING_IMPL
-
-#if defined(POLARSSL_VERSION_FEATURES) && !defined(POLARSSL_VERSION_C)
-#error "POLARSSL_VERSION_FEATURES defined, but not all prerequisites"
-#endif
-
-#if defined(POLARSSL_X509_USE_C) && ( !defined(POLARSSL_BIGNUM_C) ||  \
-    !defined(POLARSSL_OID_C) || !defined(POLARSSL_ASN1_PARSE_C) ||      \
-    !defined(POLARSSL_PK_PARSE_C) )
-#error "POLARSSL_X509_USE_C defined, but not all prerequisites"
-#endif
-
-#if defined(POLARSSL_X509_CREATE_C) && ( !defined(POLARSSL_BIGNUM_C) ||  \
-    !defined(POLARSSL_OID_C) || !defined(POLARSSL_ASN1_WRITE_C) ||       \
-    !defined(POLARSSL_PK_WRITE_C) )
-#error "POLARSSL_X509_CREATE_C defined, but not all prerequisites"
-#endif
-
-#if defined(POLARSSL_X509_CRT_PARSE_C) && ( !defined(POLARSSL_X509_USE_C) )
-#error "POLARSSL_X509_CRT_PARSE_C defined, but not all prerequisites"
-#endif
-
-#if defined(POLARSSL_X509_CRL_PARSE_C) && ( !defined(POLARSSL_X509_USE_C) )
-#error "POLARSSL_X509_CRL_PARSE_C defined, but not all prerequisites"
-#endif
-
-#if defined(POLARSSL_X509_CSR_PARSE_C) && ( !defined(POLARSSL_X509_USE_C) )
-#error "POLARSSL_X509_CSR_PARSE_C defined, but not all prerequisites"
-#endif
-
-#if defined(POLARSSL_X509_CRT_WRITE_C) && ( !defined(POLARSSL_X509_CREATE_C) )
-#error "POLARSSL_X509_CRT_WRITE_C defined, but not all prerequisites"
-#endif
-
-#if defined(POLARSSL_X509_CSR_WRITE_C) && ( !defined(POLARSSL_X509_CREATE_C) )
-#error "POLARSSL_X509_CSR_WRITE_C defined, but not all prerequisites"
-#endif
-
-/* \} name SECTION: Sanity checks */
-
-#endif /* config.h */
+#endif /* POLARSSL_CONFIG_H */