w32: Provide getopt() for Visual Studio

[empserver] / src / lib / w32 / unistd.h

diff --git a/src/lib/w32/unistd.h b/src/lib/w32/unistd.h
index 8e594ad8517bc37629c79e54bc14d75a2f515c29..6f401949f91ea4f8f43c5364aba5bfcb446e7eec 100644 (file)
--- a/src/lib/w32/unistd.h
+++ b/src/lib/w32/unistd.h
@@ -27,7 +27,7 @@
  *  unistd.h: POSIX emulation for Windows
  *
  *  Known contributors to this file:
- *     Ron Koenderink, 2007
+ *     Ron Koenderink, 2007-2021
  *     Markus Armbruster, 2007-2013
  */
 
@@ -98,7 +98,13 @@ extern int (*w32_write_function)(int, const void *, unsigned);
 #define ftruncate(fd, length) _chsize((fd), (length))
 #endif
 
-#ifndef _MSC_VER
+#ifdef _MSC_VER
+extern int getopt(int, char * const [], const char *);
+extern  char *optarg;
+extern  int opterr;
+extern  int optind;
+extern  int optopt;
+#else  /* !_MSC_VER */
 #include_next <unistd.h>
 #endif