Where is memset Hiding In VS 2015?

Question

I have installed VS 2015 RC and it's matching SDK in

U:\ => C:\Program Files (x86)\Windows Kits\10

V:\ => C:\Program Files (x86)\Microsoft Visual Studio 14.0

However, when I link my app, it can't find memset (among others). So I ran

DUMPBIN /ALL V:\VC\lib\libcmt.lib | grep "memset"

and found no reference to a definition of memset.

Next, I ran the same DUMPBIN on the libcmt.lib in VS 2013 and it listed a reference as

Archive member name at 4F0D32: /39480 f:\dd\vctools\crt_bld\SELF_X86\crt\src\build\INTEL\mt_obj\memset.obj

so I'm left wondering why there seems to be no memset in VS 2015's libcmt.lib file. The documentation for memset says that it is in every runtime library, so I expected to find it in some variation of libcmt, but no luck. Where might it be hiding?

Answer 1

VS 2015 uses the "uCRT" so a number of the CRT function bodies have moved about.

memset is now in vcruntime.lib.

Also memset is an intrinsic, so in optimized builds it's typically fully inlined.

See

• The Great C Runtime (CRT) Refactoring
• C Runtime (CRT) Features, Fixes, and Breaking Changes in Visual Studio 14 CTP1
• Introducing the Universal CRT