This browser is no longer supported.
Upgrade to Microsoft Edge to take advantage of the latest features, security updates, and technical support.
![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(48, 39%, 14%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3ED%3C/text%3E%3C/svg%3E)
I cannot build my Direct3D12 app anymore as the latest Windows Insider Preview SDK builds 25197, 25201 and 25206 gives me fatal error LNK1104: cannot open file 'libcp.lib'.
It looks like dxgiud.lib now includes /DEFAULTLIB:libcp linker directive in the object file, however libcp.lib was a statically-linked runtime deprecated back in Visual C++ 2005 and it doesn't exist in current versions. This directive is not present in dxguid.lib shipped with previous SDK builds 251xx or 22xxx.
I can specify to ignore this library in Project properties (Link - Input - Ignore Specific Default Libraries - libcp.lib), or zero out the relevant text string in dxgiuid.lib with a hex editor. But is there a tool that can actually edit existing LIB/OBJ files to change these directives? It seems MSBUILD tools like EDITBIN1 , LIB2 , and DUMPBIN3 cannot do it.
![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(201.6, 57.00000000000001%, 29%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3EMY%3C/text%3E%3C/svg%3E)
I cannot build my Direct3D12 app anymore
What version of Visual Studio are you using?
According to the thread: Starting in Visual C++ 2005, LIBCP.LIB and LIBCPD.LIB (via the old /ML and /MLd options) have been removed. Use LIBCPMT.LIB and LIBCPMTD.LIB instead via the /MT and /MTd options.
Did the project have /MT option?
What version of Visual Studio are you using?
Visual Studio 2022 17.4 Preview 2.
Did the project have /MT option?
It's not a problem with my project, it's a problem with that specific version of dxguid.lib - DUMPBIN tool reports that dxgui.obj code segment has a .drctve header that contains /DEFAULTLIB:libcp option. So you have to ask Microsoft developers responsible for building dxguid.obj and dxguid.lib in the latest Preview SDK about their project settings; I wouldn't be suprised if they still use a compiler from year 2003.
My project does use multi-threaded runtime DLL, and it also builds fine if I retarget to any previous version of the Windows SDK, or add libcp.lib to Ignore Specific Default Libraries property in Linker settings.
These GitHub issues are for errors in online documentation on UWP/WinRT development. which is hosted on Microsoft Learn/Docs. This 'libcp.lib' issue concerns downloadable Windows SDK Tools for Desktop development.
There used to be a dedicated forum, https://social.msdn.microsoft.com/Forums/en-US/home?forum=win10SDKToolsIssues , which was closed in 2020 and supposedly moved to Answers/Q&A here.