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Man Pages


Manual Reference Pages  -  MAKE_VERSION (3)

NAME

MAKE_VERSION - Create a 32 bit integer from the Allegro version

CONTENTS

Synopsis
Description
See Also

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)
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Allegro MAKE_VERSION (3) version 4.4.2

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