|| in ifdef

[rohandreamworld]

Can we use || operator in ifdef??
e.g. #ifdef _WIN32 || GNU

[moorecm]

I haven't taken notice of that specifically using an #ifdef, but I have seen things like this in the Boost source:

#     if defined(unix) || defined(__unix) || defined(_XOPEN_SOURCE)
//...
#     endif 

[rohandreamworld]

because its giving me error while compiling...

"source/lib/taap/src/messageMMap.cpp", line 419: Error: There is extra text on this line.

..
So i am not sure..

[Duthomhas]

You cannot use it with #ifdef ...
You must use it with #if

[rohandreamworld]

Duos and moorecm thanks for your reply.
Do u wanted to do like

#if _WIN32 //|| #if GNU

this??

[Duthomhas]

#if defined(_WIN32) || defined(GNU)
just like the example moorecm has already given you.

Good luck!