How to include the C extensions?

[dissectcode]

Hi - I want to use the log2f() and log2l() functions in math.h and I found that they are actually part of a C99 extension...but how do I include this math extension?

Also - is there a way to turn every extension to "on"?

Thanks!

[Laharl]

If you're using gcc, compile with the -c99 flag. If you're using another compiler, check its documentation to see if this is possible and how to do it.

[JosAH]

It depends whether or not your compiler implementation conforms to the C99
Standard (it's not an extension). Check your manuals.

kind regards,

Jos