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 <ler...@redhat.com>
---
 CryptoPkg/Include/OpenSslSupport.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/CryptoPkg/Include/OpenSslSupport.h 
b/CryptoPkg/Include/OpenSslSupport.h
index 33eda7d..ed889e9 100644
--- 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.
    For pre-Standard C compilers, here is a version that usually works
    (but watch out!): */
-#define offsetof(type, member) ( (int) & ((type*)0) -> member )
+#define offsetof(type, member) OFFSET_OF (type, member)
 
 //
 // Basic types from EFI Application Toolkit required to buiild Open SSL
-- 
1.8.3.1


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