On 2017/10/12 15:10, Frédéric wrote:
Hi,
I am using mingw w64 5.0.2 on a linux machine with gcc/g++ 7.2.0.
I noticed that the macro WIN32 is:
- defined if -std=gnu++{98,11,14,17}
- not defined if -std=c++{98,11,14,17}
why such difference?
A library I try to cross-compile tests for WIN32 and fails. I have to
manually change all WIN32 in _WIN32.
From what I understand, macros without _ are the responsability of
w64, not gcc but I may be wrong.
A name that:
1) begins with (in C) / contain (in C++) two underscores, or
2) begins with an underscore followed by an uppercase letter
is reserved by the implementation for any use.
In strict standard-conforming mode (-std=c++??) use of non-reserved
names as macros will break code such as `int WIN32 = 0;`, as the
standard does not allow it to fail. Hence, macros with non-reserved
names are not defined in this mode. Those with reserved names are
provided in both modes.
--
Best regards,
LH_Mouse
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