Build fixes

Various build fixes, mostly uncovered by clang's unused-const-variable
and unused-function errors.
Reviewed-by: NKurt Roeckx <kurt@openssl.org>
(cherry picked from commit 0e1c318ece3c82e96ae95a34a1badf58198d6b28)

crypto/ec/ec_lib.c

@@ -70,7 +70,7 @@
 
 #include "ec_lcl.h"
 
-static const char EC_version[] = "EC" OPENSSL_VERSION_PTEXT;
+const char EC_version[] = "EC" OPENSSL_VERSION_PTEXT;
 
 
 /* functions for EC_GROUP objects */

crypto/ec/ecp_nistp256.c

@@ -108,7 +108,6 @@ typedef u64 smallfelem[NLIMBS];
 
 /* This is the value of the prime as four 64-bit words, little-endian. */
 static const u64 kPrime[4] = { 0xfffffffffffffffful, 0xffffffff, 0, 0xffffffff00000001ul };
-static const limb bottom32bits = 0xffffffff;
 static const u64 bottom63bits = 0x7ffffffffffffffful;
 
 /* bin32_to_felem takes a little-endian byte array and converts it into felem

crypto/ec/ectest.c

@@ -1367,7 +1367,7 @@ static const struct nistp_test_params nistp_tests_params[] =
 		},
 	};
 
-void nistp_single_test(const struct nistp_test_params *test)
+static void nistp_single_test(const struct nistp_test_params *test)
 	{
 	BN_CTX *ctx;
 	BIGNUM *p, *a, *b, *x, *y, *n, *m, *order;
@@ -1470,7 +1470,7 @@ void nistp_single_test(const struct nistp_test_params *test)
 	BN_CTX_free(ctx);
 	}
 
-void nistp_tests()
+static void nistp_tests()
 	{
 	unsigned i;
 

crypto/engine/eng_dyn.c

@@ -114,9 +114,6 @@ static const ENGINE_CMD_DEFN dynamic_cmd_defns[] = {
 		ENGINE_CMD_FLAG_NO_INPUT},
 	{0, NULL, NULL, 0}
 	};
-static const ENGINE_CMD_DEFN dynamic_cmd_defns_empty[] = {
-	{0, NULL, NULL, 0}
-	};
 
 /* Loading code stores state inside the ENGINE structure via the "ex_data"
  * element. We load all our state into a single structure and use that as a