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# The Winpthreads Library
This library provides POSIX threading APIs for mingw-w64.
## Linking Against Winpthreads
For maximum compatibility, winpthreads headers expose APIs without the
`dllimport` attribute by default.
If your program is linked against the DLL, you may define the macro
`WINPTHREADS_USE_DLLIMPORT` to add `dllimport` attributes to all APIs,
which makes function calls to them a bit more efficient.
Be careful when you build static libraries; you probably do not want to define
`WINPTHREADS_USE_DLLIMPORT` unconditionally, to ensure that your code can link
against either shared or static winpthreads. Note that winpthreads does not
export any variables, which means that `dllimport` is not requred, with both
MSVC and mingw-w64 toolchains.