win32: implement symlink(2)

Provide an implementation of symlink(2).

Calls to symlink(2) will fail in default Windows installations unless
running with elevated privileges.  Failure to create a symlink when
extracting files from an archive is therefore treated as a non-fatal
error.

There are two ways to permit the creation of symlinks:

- Edit security policy to give users the 'Create symbolic links'
  privilege.  Unfortunately this doesn't work for users who are an
  Administrator.

- Enable developer mode, which is available in later versions of
  Windows 10.

The ability to create symlinks is not available in Windows XP
or ReactOS.

1 files changed, 1 insertions, 1 deletions

diff --git a/include/mingw.h b/include/mingw.h
index 713205ef9..e2c02babf 100644
--- a/include/mingw.h
+++ b/include/mingw.h
@@ -440,7 +440,7 @@ NOIMPL(setsid,void);
 NOIMPL(setuid,uid_t gid UNUSED_PARAM);
 NOIMPL(seteuid,uid_t gid UNUSED_PARAM);
 unsigned int sleep(unsigned int seconds);
-NOIMPL(symlink,const char *oldpath UNUSED_PARAM, const char *newpath UNUSED_PARAM);
+int symlink(const char *target, const char *linkpath);
 static inline void sync(void) {}
 long sysconf(int name);
 IMPL(getpagesize,int,4096,void);