cli_classic: include a fallback inplementation of getopt

Some systems, DJGPP/DOS for now, may not provide getopt and their gnu
extensions. So provide a fallback implementation.
The code is based on musl libc.

Change-Id: I6ebbde075014e3b45b0f9e04b34b72aa969e1197
Signed-off-by: Thomas Heijligen <thomas.heijligen@secunet.com>
Reviewed-on: https://review.coreboot.org/c/flashrom/+/73102
Reviewed-by: Anastasia Klimchuk <aklm@chromium.org>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>

1 files changed, 43 insertions, 0 deletions

diff --git a/include/cli_classic.h b/include/cli_classic.h
new file mode 100644
index 00000000..e651cc63
--- /dev/null
+++ b/include/cli_classic.h
@@ -0,0 +1,43 @@
+/*
+ * This file is part of the flashrom project.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ */
+
+#ifndef CLI_CLASSIC_H
+#define CLI_CLASSIC_H
+
+#if __has_include(<getopt.h>)
+#include <getopt.h>
+#else
+
+#define	no_argument		0
+#define required_argument	1
+#define optional_argument	2
+
+extern char *optarg;
+extern int optind, opterr, optopt;
+
+struct option {
+  const char *name;
+  int has_arg;
+  int *flag;
+  int val;
+};
+
+int getopt (int argc, char *const *argv, const char *shortopts);
+int getopt_long (int argc, char *const *argv, const char *shortopts,
+			const struct option *longopts, int *longind);
+int getopt_long_only (int argc, char *const *argv, const char *shortopts,
+			const struct option *longopts, int *longind);
+
+#endif /* __has_include() */
+#endif /* CLI_CLASSIC_H */