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MAKE_VERSION(3)                 Allegro manual                 MAKE_VERSION(3)

NAME
       MAKE_VERSION - Create a 32 bit integer from the Allegro version

SYNOPSIS
       #include <allegro.h>

       Macro MAKE_VERSION(a, b, c)

DESCRIPTION
       This macro can be used to check if some Allegro version is (binary)
       compatible with the current version. It is safe to use > and < to check
       if one version is more recent than another.  The third number is
       ignored if the second number is even, so MAKE_VERSION(4, 2, 0) is
       equivalent to MAKE_VERSION(4, 2, 1).  This is because of our version
       numbering policy since 4.0.0: the second number is even for stable
       releases, which must be ABI-compatible with earlier versions of the
       same series.  This macro is mainly useful for addon packages and
       libraries. See the `ABI compatibility information' section of the
       manual for more detailed information. Example:

          /* Check if the current version is compatible with Allegro 4.2.0 */
          #if (MAKE_VERSION(4, 2, 0) <= MAKE_VERSION(ALLEGRO_VERSION, \
                             ALLEGRO_SUB_VERSION, ALLEGRO_WIP_VERSION))
             /* Allegro 4.2.0 compatibility */
          #else
             /* Work-around */
          #endif

SEE ALSO
       ALLEGRO_VERSION(3), ALLEGRO_SUB_VERSION(3), ALLEGRO_WIP_VERSION(3)

Allegro                          version 4.4.2                 MAKE_VERSION(3)