Third-party tools that need to determine the MySQL version from
      the MySQL source can read the VERSION file in
      the top-level source directory. The file lists the pieces of the
      version separately. For example, if the version is MySQL
      5.7.4-m14, the file looks like this:
    
MYSQL_VERSION_MAJOR=5
MYSQL_VERSION_MINOR=7
MYSQL_VERSION_PATCH=4
MYSQL_VERSION_EXTRA=-m14
      If the source is not for a MySQL Server General Availablility (GA)
      release, the MYSQL_VERSION_EXTRA value is
      nonempty. In the preceding example, the value corresponds to
      Milestone 14.
    
      MYSQL_VERSION_EXTRA is also nonempty for NDB
      Cluster releases (including GA releases of NDB Cluster), as shown
      here:
    
MYSQL_VERSION_MAJOR=5
MYSQL_VERSION_MINOR=7
MYSQL_VERSION_PATCH=32
MYSQL_VERSION_EXTRA=-ndb-7.5.21To construct a five-digit number from the version components, use this formula:
MYSQL_VERSION_MAJOR*10000 + MYSQL_VERSION_MINOR*100 + MYSQL_VERSION_PATCH