GCC-15 complains about this when trying to build on musl
| ../nettle-3.10.1/getopt.c:139:14: error: conflicting types for 'getenv'; have 'char *(void)'
| 139 | extern char *getenv ();
| | ^~~~~~
---
getopt.c | 2 +-
getopt.h | 2 +-
2 files changed, 2 insertions(+), 2 deletions(-)
diff --git a/getopt.c b/getopt.c
index 9d29de7..5b89302 100644
--- a/getopt.c
+++ b/getopt.c
@@ -136,7 +136,7 @@ static struct _getopt_data getopt_data;
whose names are inconsistent. */
#ifndef getenv
-extern char *getenv ();
+extern char *getenv (const char *);
#endif
#endif /* not __GNU_LIBRARY__ */
diff --git a/getopt.h b/getopt.h
index da1a01f..ab50792 100644
--- a/getopt.h
+++ b/getopt.h
@@ -166,7 +166,7 @@ extern int __posix_getopt (int ___argc, char *const *___argv,
# endif
# endif
#else /* not __GNU_LIBRARY__ */
-extern int getopt ();
+extern int getopt(int, char * const [], const char *);
#endif /* __GNU_LIBRARY__ */
#ifndef __need_getopt
