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Important This document may not represent best practices for current development, links to downloads and other resources may no longer be valid. Current recommended version can be found here.

OpenMP Libraries

Discusses the .lib files that make up the OpenMP run-time libraries in Visual C++.

The following libraries contain the Visual C++ OpenMP run-time library functions.

OpenMP run-time library



Multithreaded, dynamic link (import library for VCOMP.LIB).


Multithreaded, dynamic link (import library for VCOMPD.LID) (debug)

If _DEBUG is defined in a compilation and if #include omp.h is in source code, VCOMPD.LIB will be the default lib. Otherwise, VCOMP.LIB will be used.

You can use /NODEFAULTLIB (Ignore Libraries) to remove the default lib and explicitly link with the lib of your choice.

The OpenMP DLLs are in the Visual C++ redistributable directory and need to be distributed with applications that use OpenMP.

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