lib/tpm2_kdfa.c: Fix pragma statement.

The pragma statement to deactivate optimization for gcc produced
an error when clang is used with -Werror.

Signed-off-by: Juergen Repp <[email protected]>

Author: JuergenReppSIT

lib/tpm2_kdfa.c

@@ -18,9 +18,11 @@
  */
 
 #ifdef _FORTIFY_SOURCE
+#if defined(__GNUC__) && !defined(__clang__)
 #pragma GCC push_options
 #pragma GCC optimize ("O0")
 #endif
+#endif
 
 TSS2_RC tpm2_kdfa(TPMI_ALG_HASH hash_alg, TPM2B *key, char *label,
         TPM2B *context_u, TPM2B *context_v, UINT16 bits,
@@ -153,8 +155,10 @@ TSS2_RC tpm2_kdfa(TPMI_ALG_HASH hash_alg, TPM2B *key, char *label,
 #endif
 
 #ifdef _FORTIFY_SOURCE
+#if defined(__GNUC__) && !defined(__clang__)
 #pragma GCC pop_options
 #endif
+#endif