From: Čestmír Kalina <ckalina@redhat.com>
Date: Fri, 2 Dec 2022 11:44:09 +0000 (-0500)
Subject: e_os2: add ossl_static_assert_type_eq
X-Git-Tag: openssl-3.2.0-alpha1~1147
X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=0e200d2a19185dab9d73eee90bd6cd0246416a9e;p=thirdparty%2Fopenssl.git

e_os2: add ossl_static_assert_type_eq

Add a gcc-only static assertion that a variable is of a specified type.

Signed-off-by: Čestmír Kalina <ckalina@redhat.com>

Reviewed-by: Tomas Mraz <tomas@openssl.org>
Reviewed-by: Paul Dale <pauli@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/12256)
---

diff --git a/include/internal/e_os.h b/include/internal/e_os.h
index 0455849559c..df5d0b05840 100644
--- a/include/internal/e_os.h
+++ b/include/internal/e_os.h
@@ -22,6 +22,15 @@
  * outside; this file e_os.h is not part of the exported interface.
  */
 
+/* ossl_static_assert_type_eq: gcc-only variable type static assertion */
+# if defined(__GNUC__) && !defined(__clang__)
+#  define ossl_static_assert_type_eq(type, x)                                \
+        _Static_assert((__builtin_types_compatible_p(type, __typeof__(x))),  \
+                        #x " type check failed, expected: " #type)
+# else
+#  define ossl_static_assert_type_eq(type, x)
+# endif
+
 # if defined(OPENSSL_SYS_VXWORKS) || defined(OPENSSL_SYS_UEFI)
 #  define NO_CHMOD
 #  define NO_SYSLOG