Implement Solaris support #188
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These changes allow Blink to be built with the default configuration on Solaris, tested on a Solaris 11.4 VM. The main addition is to introduce emulation of flock with fcntl, since the former is not available on new Solaris versions. Additionally, fd_set handling is modified to use heap memory instead of stack memory, since this can exceed the frame size.
the lock exits, all its locks are released. This makes it difficult for us to implement a flock command line replacement simply with fcntl, but we can instead use O_CREAT and O_EXCL to simulate locking with a file.
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These changes allow Blink to be built with the default configuration on Solaris, tested on a Solaris 11.4 VM. The main addition is to introduce emulation of flock with fcntl, since the former is not available on new Solaris versions.
Additionally, fd_set handling is modified to use heap memory instead of stack memory, since this can exceed the frame size.