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-rw-r--r--newlib/libc/include/sys/unistd.h3
1 files changed, 3 insertions, 0 deletions
diff --git a/newlib/libc/include/sys/unistd.h b/newlib/libc/include/sys/unistd.h
index df824d88d..1565bf0f8 100644
--- a/newlib/libc/include/sys/unistd.h
+++ b/newlib/libc/include/sys/unistd.h
@@ -101,6 +101,9 @@ int _EXFUN(setegid, (gid_t __gid ));
int _EXFUN(seteuid, (uid_t __uid ));
#endif
int _EXFUN(setgid, (gid_t __gid ));
+#if defined(__CYGWIN__)
+int _EXFUN(setgroups, (int ngroups, const gid_t *grouplist ));
+#endif
int _EXFUN(setpgid, (pid_t __pid, pid_t __pgid ));
int _EXFUN(setpgrp, (void ));
pid_t _EXFUN(setsid, (void ));