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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 d6ff2500a..06773ccfd 100644
--- a/newlib/libc/include/sys/unistd.h
+++ b/newlib/libc/include/sys/unistd.h
@@ -64,6 +64,9 @@ pid_t _EXFUN(getpgid, (pid_t));
pid_t _EXFUN(getpgrp, (void ));
pid_t _EXFUN(getpid, (void ));
pid_t _EXFUN(getppid, (void ));
+#ifdef __CYGWIN__
+pid_t _EXFUN(getsid, (pid_t));
+#endif
uid_t _EXFUN(getuid, (void ));
#ifdef __CYGWIN__
char * _EXFUN(getusershell, (void));