'_snprintf': is not a member of 'std'

[babzog]

While building our project with Visual Studio 2017 and linking to the new boost 1.69, I encountered the following error:

c:/git/oss/boost/1.69.0\boost/system/detail/system_category_win32.hpp(52): error C2039: '_snprintf': is not a member of 'std'C:\Program Files (x86)\Microsoft Visual Studio\2017\Professional\VC\Tools\MSVC\14.16.27023\include\functional(23): note: see declaration of 'std'
make.exe[2]: *** [c:/artifacts/build32//client//core/obj/buttercup.obj] Error 2

I don't actually know what series of header #includes led to system_category_win32.hpp being yanked in, but it is... and it built without error when we were using boost 1.51.

Googling didn't really help explain very well, why this is happening.

[pdimov]

You have #define snprintf _snprintf somewhere before including the Boost.System header.

[pdimov]

(This #define should no longer be necessary for VS2015 and above - it has a legitimate snprintf.)

[bstaletic]

I had this problem. Python.h does the following

#ifndef HAVE_SNPRINTF
#define snprintf _snprintf
#endif 

You just need to add /DHAVE_SNPRINTF to your flags.

[babzog]

That was indeed my problem. That declaration was littered throughout the code. Thank you for the guidance!

[omeryasar]

#ifndef HAVE_SNPRINTF
#define snprintf _snprintf
#endif 

Hi, I have the same problem but I don't understand exactly what should I have to do for fixing the problem. Can you please explain your answer

[kedakedaxia]

you can Add to header file "#undef snprintf"