CryptoPkg: OpenSslSupport.h: edk2-ize offsetof() macro for gcc-4.8 / X64

Code added in SVN r16339 ("CryptoPkg Updates to support RFC3161 timestamp
signature verification.") introduced many new uses of the offsetof()
macro. Since the offsetof() macro in "OpenSslSupport.h" casts a pointer to
an "int", it triggers a large number of

  error: cast from pointer to integer of different size
  [-Werror=pointer-to-int-cast]

errors when building CryptoPkg with gcc-4.8 for X64.

Remedy this by directing offsetof() to the OFFSET_OF() macro in
"MdePkg/Include/Base.h" (which matches how "OpenSslSupport.h" resolves the
va_*() macros too).

Contributed-under: TianoCore Contribution Agreement 1.0

Signed-off-by: Laszlo Ersek <lersek@redhat.com>
Build-tested-by: Scott Duplichan <scott@notabs.org>
Reviewed-by: Jordan Justen <jordan.l.justen@intel.com>
Reviewed-by: Qin Long <qin.long@intel.com>
git-svn-id: https://svn.code.sf.net/p/edk2/code/trunk/edk2@16388 6f19259b-4bc3-4df7-8a09-765794883524

diff --git a/CryptoPkg/Include/OpenSslSupport.h b/CryptoPkg/Include/OpenSslSupport.h
index 33eda7dd50e1457c58bf8fb0be59b897a276e485..ed889e91c7cc7aaee2cf608f4951d810bff103e0 100644 (file)
--- a/CryptoPkg/Include/OpenSslSupport.h
+++ b/CryptoPkg/Include/OpenSslSupport.h
@@ -72,7 +72,7 @@ typedef VOID  *FILE;
    portably, hence it is provided by a Standard C header file.\r
    For pre-Standard C compilers, here is a version that usually works\r
    (but watch out!): */\r
-#define offsetof(type, member) ( (int) & ((type*)0) -> member )\r
+#define offsetof(type, member) OFFSET_OF (type, member)\r
 \r
 //\r
 // Basic types from EFI Application Toolkit required to buiild Open SSL\r