__GNUC__ and __GNUC_MINOR__

[Bruno H. <br...@cl...>]

Hi Vladimir,

In this conditional expression:
((__GNUC__ >= 4) && (__GNUC_MINOR__ >= 5))
the conditional for GCC looks odd: it
 - includes versions 4.5, 4.6, 4.7, 4.8, 4.9
 - but excludes versions 5.4, 6.3, 7.1
which is probably not what you meant since GCC 5.4 is a successor of 4.9.

The usual way to write conditions like this is
  (((__GNUC__ == 4) && (__GNUC_MINOR__ >= 5)) || (__GNUC__ > 4))
or - not my preferred coding style -
  (__GNUC__ + (__GNUC_MINOR__ >= 5) > 4)

Note that this doesn't help with clang on Mac OS X, since it defines
__GNUC__ = 4 and __GNUC_MINOR__ = 2.

Bruno