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Jim Meyering
8024f33e45
Don't use SA_INTERRUPT to decide whether to call sigaction, as POSIX.1 doesn't require SA_INTERRUPT and some systems (e.g. Solaris 7) don't define it. Use SA_NOCLDSTOP instead; it's been part of POSIX.1 since day 1 (in 1988). (install_handler): Use SA_NOCLDSTOP, not _POSIX_VERSION, to decide whether to call sigaction; this fixes an old typo.