OpenSSL version number when compiling

[Dr. Matthias St. Pierre]

> #if OPENSSL_VERSION_NUMBER > 0x30100ff0L

Kenneth, is it possible that you didn't include opensslv.h?  IIRC, the expression evaluates to #if 0 > 0x30100ff0L if OPENSSL_VERSION_NUMBER is not defined.


> No, that's incorrect. Per  OPENSSL_VERSION_NUMBER(3) the format is:
> 
> MNNFFPPS: major minor fix patch status

Tom, it seems like you've got an OpenSSL 1.1.1 manual page here.

/* Synthesize OPENSSL_VERSION_NUMBER with the layout 0xMNN00PPSL */
# ifdef OPENSSL_VERSION_PRE_RELEASE
#  define _OPENSSL_VERSION_PRE_RELEASE 0x0L
# else
#  define _OPENSSL_VERSION_PRE_RELEASE 0xfL
# endif
# define OPENSSL_VERSION_NUMBER          \
    ( (OPENSSL_VERSION_MAJOR<<28)        \
      |(OPENSSL_VERSION_MINOR<<20)       \
      |(OPENSSL_VERSION_PATCH<<4)        \
      |_OPENSSL_VERSION_PRE_RELEASE )

https://github.com/openssl/openssl/blob/openssl-3.1/include/openssl/opensslv.h.in#L92-L102

Regards,
Matthias

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