Create a 32 bit integer from the Allegro version
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
/* Check if the current version is compatible with Allegro 4.2.0 */
#if (MAKE_VERSION(4, 2, 0) <= MAKE_VERSION(ALLEGRO_VERSION, \
/* Allegro 4.2.0 compatibility */
/* Work-around */
The following projects include source code containing this keyword: