# qopenmp-lib, Qopenmp-lib

Lets you specify an OpenMP* run-time library to use for linking.

## Syntax

Linux: | -qopenmp-lib=type

macOS: | -qopenmp-lib=type

Windows: | /Qopenmp-lib:type

## Arguments

type | Specifies the type of library to use; it implies compatibility levels. Currently, the only possible value is:
compat | Tells the compiler to use the compatibility OpenMP* run-time library (libiomp). This setting provides compatibility with object files created using Microsoft* and GNU* compilers.

## Default

-qopenmp-lib=compat or /Qopenmp-lib:compat | The compiler uses the compatibility OpenMP* run-time library (libiomp).

## Description

This option lets you specify an OpenMP* run-time library to use for linking.

The compatibility OpenMP run-time libraries are compatible with object files created using the Microsoft* OpenMP run-time library (vcomp) or the GNU OpenMP run-time library (libgomp).

To use the compatibility OpenMP run-time library, compile and link your application using the compat setting for option [q or Q]openmp-lib. To use this option, you must also specify one of the following compiler options:

- Linux* systems: -qopenmp or -qopenmp-stubs

- Windows* systems: /Qopenmp or /Qopenmp-stubs

On Windows* systems, the compatibility OpenMP* run-time library lets you combine OpenMP* object files compiled with the Microsoft* C/C++ compiler with OpenMP* object files compiled with the Intel® C, Intel® C++, or Intel® Fortran compilers. The linking phase results in a single, coherent copy of the run-time library.

On Linux* systems, the compatibility Intel OpenMP* run-time library lets you combine OpenMP* object files compiled with the GNU* gcc or gfortran compilers with similar OpenMP* object files compiled with the Intel® C, Intel® C++, or Intel® Fortran Compiler. The linking phase results in a single, coherent copy of the run-time library.

### Note

The compatibility OpenMP run-time library is not compatible with object files created using versions of the Intel compilers earlier than 10.0.

### Note

On Windows* systems, this option is processed by the compiler, which adds directives to the compiled object file that are processed by the linker. On Linux* and macOS* systems, this option is processed by the icc/icpc command that initiates linking, adding library names explicitly to the link command.

## IDE Equivalent

None

## Alternate Options

None

Parent topic: OpenMP* Options and Parallel Processing Options

## See Also

qopenmp, Qopenmp compiler option
qopenmp-stubs, Qopenmp-stubs compiler option