Fix a build error when building with C++11 & -Werror=terminate. Destructors are noexcept by default in C++11, which gets flagged it one spot in cryptlib code. Using noexcept(false) ought to be ok here; the exception would only happen if you had a corrupted keyfile, which is unrecoverable anyway.

src/cryptlib/asn.cpp

@@ -81,7 +81,7 @@ BERSequenceDecoder::BERSequenceDecoder(BufferedTransformation &inQueue)
     definiteLength = BERLengthDecode(inQueue, length);
 }
 
-BERSequenceDecoder::~BERSequenceDecoder()
+BERSequenceDecoder::~BERSequenceDecoder() NOEXCEPT_FALSE
 {
     if (!definiteLength)
     {   // remove end-of-content octects

src/cryptlib/asn.h

@@ -25,7 +25,7 @@ class BERSequenceDecoder : public BufferedTransformation
 {
 public:
     BERSequenceDecoder(BufferedTransformation &inQueue);
-    ~BERSequenceDecoder();
+    ~BERSequenceDecoder() NOEXCEPT_FALSE;
 
     void Put(byte) {}
     void Put(const byte *, unsigned int) {}

src/cryptlib/cryptlib.h

@@ -10,6 +10,12 @@
 #include <exception>
 #include <string>
 
+#if __cplusplus >= 201103L
+# define NOEXCEPT_FALSE noexcept(false)
+#else
+# define NOEXCEPT_FALSE
+#endif
+
 /// base class for all exceptions thrown by Crypto++
 class CryptlibException : public std::exception
 {
@@ -198,7 +204,7 @@ class BufferedTransformation
 {
 public:
     ///
-    virtual ~BufferedTransformation() {}
+    virtual ~BufferedTransformation() NOEXCEPT_FALSE {}
 
     //@Man: INPUT
     //@{