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Add musl's implementation of getopt_long_only

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Both `getopt_long` and `getopt_long_only` are GNU-specific, so we'll be
copying musl's implementation for portability.
This was retrieved as of commit 90251cf73dfdd44e7a3f085d236e89a7dff1b00b.

musl is licensed as MIT, which is compatible (being identical...) to RGBDS'.
The file is being copied as-is, without a copyright notice or attribution,
but this is only to have a verbatim copy in the history. Those will be added
in the next commit.
This commit is contained in:
ISSOtm
2019-11-06 00:40:55 +01:00
parent a40d599cd7
commit 072c965ba5
2 changed files with 178 additions and 0 deletions
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30
include/extern/getopt.h vendored Normal file
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@@ -0,0 +1,30 @@
#ifndef _GETOPT_H
#define _GETOPT_H
#ifdef __cplusplus
extern "C" {
#endif
int getopt(int, char * const [], const char *);
extern char *optarg;
extern int optind, opterr, optopt, optreset;
struct option {
const char *name;
int has_arg;
int *flag;
int val;
};
int getopt_long(int, char *const *, const char *, const struct option *, int *);
int getopt_long_only(int, char *const *, const char *, const struct option *, int *);
#define no_argument 0
#define required_argument 1
#define optional_argument 2
#ifdef __cplusplus
}
#endif
#endif