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cvisual-studiostduefiedk2

MSVC Manually Linking stdlib

Currently I am trying to use the C standard library in my EDK2 project. As my Visual Studio 2019 did not automatically add the necessary include directories, I manually added the following folders to my include directories:

C:\edk2\MdePkg\Include\X64
C:\edk2\MdePkg\Include
C:\Program Files (x86)\Microsoft Visual Studio\2019\Preview\VC\Tools\MSVC\14.28.29812\include
C:\Program Files (x86)\Microsoft Visual Studio\2019\Preview\VC\Tools\MSVC\14.28.29812\atlmfc\include
C:\Program Files (x86)\Microsoft Visual Studio\2019\Preview\VC\Auxiliary\VS\include
C:\Program Files (x86)\Windows Kits\10\Include\10.0.19041.0\ucrt
C:\Program Files (x86)\Windows Kits\10\Include\10.0.19041.0\um
C:\Program Files (x86)\Windows Kits\10\Include\10.0.19041.0\shared
C:\Program Files (x86)\Windows Kits\10\Include\10.0.19041.0\winrt
C:\Program Files (x86)\Windows Kits\10\Include\10.0.19041.0\cppwinrt
C:\Program Files (x86)\Windows Kits\NETFXSDK\4.8\Include\um

As this fixed my missing #include directives, the only thing left for me was to manually add the missing libraries to the linker arguments.

I did this as follows:

1.) After a quick Google search i found out, that I have to link my application against libucrt.lib, which i then tried to locate inside of my Windows 10 SDK by performing a simple search, which yielded me the following results:

C:\Program Files (x86)\Windows Kits\10\Lib\10.0.19041.0\ucrt\x64

As a result, I added this directory to my library directories inside Visual Studio 2019. Not to forget, I added libucrt.lib as well: Linker Libraries

My problem is, that after compiling my project, I still get an error from the linker: Linker error

I already tried out using different include directories, as well as different Windows SDK versions, but none seemed to solve my problem.

I am grateful for any kind of help, thank you.

Solution

  • I settled on implementing the functions I needed from the stdlib myself, as @user123 proposed, in order to solve this problem and save me a lot of time.