File sgml-tools-1.0.9-gcc15.diff of Package sgmltool

--- a/sgmls-1.1/getopt.h	1996-12-02 12:16:29.000000000 +0100
+++ b/sgmls-1.1/getopt.h	2025-05-02 23:51:50.059256831 +0200
@@ -4,8 +4,12 @@
 conflicting definition.  Systems differ on how they declare the second
 parameter. */
 
+#ifdef HAVE_UNISTD_H
+#include <unistd.h>
+#else
 extern int getopt();
 
 extern char *optarg;
 extern int optind;
 extern int opterr;
+#endif