1 files changed, 56 insertions, 0 deletions
diff --git a/src/include/pg_getopt.h b/src/include/pg_getopt.h
new file mode 100644
index 0000000..66f1b75
--- /dev/null
+++ b/src/include/pg_getopt.h
@@ -0,0 +1,56 @@
+/*
+ * Postgres files that use getopt(3) always include this file.
+ * We must cope with three different scenarios:
+ * 1. We're using the platform's getopt(), and we should just import the
+ *    appropriate declarations.
+ * 2. The platform lacks getopt(), and we must declare everything.
+ * 3. The platform has getopt(), but we're not using it because we don't
+ *    like its behavior.  The declarations we make here must be compatible
+ *    with both the platform's getopt() and our src/port/getopt.c.
+ *
+ * Portions Copyright (c) 1987, 1993, 1994
+ * The Regents of the University of California.  All rights reserved.
+ *
+ * Portions Copyright (c) 2003-2021, PostgreSQL Global Development Group
+ *
+ * src/include/pg_getopt.h
+ */
+#ifndef PG_GETOPT_H
+#define PG_GETOPT_H
+
+/* POSIX says getopt() is provided by unistd.h */
+#include <unistd.h>
+
+/* rely on the system's getopt.h if present */
+#ifdef HAVE_GETOPT_H
+#include <getopt.h>
+#endif
+
+/*
+ * If we have <getopt.h>, assume it declares these variables, else do that
+ * ourselves.  (We used to just declare them unconditionally, but Cygwin
+ * doesn't like that.)
+ */
+#ifndef HAVE_GETOPT_H
+
+extern char *optarg;
+extern int	optind;
+extern int	opterr;
+extern int	optopt;
+
+#endif							/* HAVE_GETOPT_H */
+
+/*
+ * Some platforms have optreset but fail to declare it in <getopt.h>, so cope.
+ * Cygwin, however, doesn't like this either.
+ */
+#if defined(HAVE_INT_OPTRESET) && !defined(__CYGWIN__)
+extern int	optreset;
+#endif
+
+/* Provide getopt() declaration if the platform doesn't have it */
+#ifndef HAVE_GETOPT
+extern int	getopt(int nargc, char *const *nargv, const char *ostr);
+#endif
+
+#endif							/* PG_GETOPT_H */