Use BOOST_POSIX_API on cygwin. #137
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Lastique
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Because Boost.System has switched to define BOOST_POSIX_API on Cygwin[1], Boost.Filesystem now defines its own set of macros for platform API selection. At this time, we preserve the previous behavior, where Cygwin is treated as Windows. [1]: boostorg/system#137
Lastique
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Because Boost.System has switched to define BOOST_POSIX_API on Cygwin[1], Boost.Filesystem now defines its own set of macros for platform API selection. At this time, we preserve the previous behavior, where Cygwin is treated as Windows. [1]: boostorg/system#137
Lastique
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Dec 22, 2025
Because Boost.System has switched to define BOOST_POSIX_API on Cygwin[1], Boost.Filesystem now defines its own set of macros for platform API selection. At this time, we preserve the previous behavior, where Cygwin is treated as Windows. [1]: boostorg/system#137
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This is part of a set of changes to fix boost on cygwin. You can see the other submodules that will require changes here:
boostorg/boost@master...corngood:boost:cygwin
These are based on the out-of-date downstream patches in cygwin:
https://cygwin.com/cgit/cygwin-packages/boost/tree/