newlib/winsup/cygwin/release/2.11.0

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What's new:
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- New API: clearenv, pthread_tryjoin_np, pthread_timedjoin_np.
What changed:
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- SO_RCVTIMEO and SO_SNDTIMEO socket options are now honored.
- /proc/cpuinfo now reports L3 cache size on Intel CPUs.
Bug Fixes
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- Fix utils path handling in case cygdrive path is just '/'.
Addresses: https://cygwin.com/ml/cygwin/2018-02/msg00174.html
- Fix a potential SIGFPE in strtod, if FE_INVALID exceptions are
enabled.
Addresses: https://cygwin.com/ml/cygwin/2018-04/msg00055.html
- Fix a CPU affinity problem when creating /proc/cpuinfo output.
Addresses: https://cygwin.com/ml/cygwin/2018-04/msg00118.html
- Fix a buffer underrun problem in Win32 path normalization.
Addresses: https://cygwin.com/ml/cygwin/2018-05//msg00017.html
- Fix a stack alignment problem which may lead to spurious crashes after
fork.
Addresses: https://cygwin.com/ml/cygwin-patches/2018-q2/msg00016.html
- Fix a g++ compilation problem with -std=c++14 or -std=c++17.
Addresses: https://cygwin.com/ml/cygwin/2018-05/msg00316.html
- Fix FPE flag handling for division by zero conditions
Addresses: https://cygwin.com/ml/cygwin/2018-06/msg00281.html
- Fix Unicode table.
Addresses: https://cygwin.com/ml/cygwin/2018-06/msg00248.html
- Handle a non-standard return value from some tape drives to
report a "no-media" error.
Addresses: https://cygwin.com/ml/cygwin/2018-06/msg00245.html
- Fix duration handling in sigtimedwait
Addresses: https://cygwin.com/ml/cygwin-patches/2018-q3/msg00018.html
- Make FP environment symbols available on x86_64.
Addresses: https://cygwin.com/ml/cygwin/2018-07/msg00183.html