Fix Clang warning on missing template definitions

1 files changed, 8 insertions, 1 deletions

diff --git a/pkcspad.h b/pkcspad.h
index b75bce6a..5d4909fb 100644
--- a/pkcspad.h
+++ b/pkcspad.h
@@ -53,12 +53,19 @@ class MD5;
 }

 // end of list

 

-#ifdef CRYPTOPP_IS_DLL

+#if defined(CRYPTOPP_IS_DLL)

 CRYPTOPP_DLL_TEMPLATE_CLASS PKCS_DigestDecoration<SHA1>;

 CRYPTOPP_DLL_TEMPLATE_CLASS PKCS_DigestDecoration<SHA224>;

 CRYPTOPP_DLL_TEMPLATE_CLASS PKCS_DigestDecoration<SHA256>;

 CRYPTOPP_DLL_TEMPLATE_CLASS PKCS_DigestDecoration<SHA384>;

 CRYPTOPP_DLL_TEMPLATE_CLASS PKCS_DigestDecoration<SHA512>;

+#elif defined(__clang__)

+// Provide a default definition to avoid Clang warnings. CRTP will provide a

+// real definition later. The single element is due to MSVC compile failures

+// after adding the default definition. However, GCC produces multiple

+// definitions which result in link failures. I give up...

+template <class H>

+const byte PKCS_DigestDecoration<H>::decoration[1] = {0x00};

 #endif

 

 //! \class PKCS1v15_SignatureMessageEncodingMethod