0004_inquire_unistd.patch

commit e146f58a410184863e5ce4615f4e297b754664a4
Author: Andrew Annex <ama6fy@virginia.edu>
Date:   Fri Apr 9 18:42:56 2021 -0400

    patch for inquire.c

diff --git a/cspice/src/cspice/inquire.c b/cspice/src/cspice/inquire.c
index 2949165..fe6bc39 100644
--- a/cspice/src/cspice/inquire.c
+++ b/cspice/src/cspice/inquire.c
@@ -1,6 +1,7 @@
 #include "f2c.h"
 #include "fio.h"
 #include "string.h"
+#include <unistd.h>
 #ifdef KR_headers
 integer f_inqu(a) inlist *a;
 #else