check for fcntl()

win32 has a fcntl header but no fcntl function

configure.ac

@@ -494,6 +494,7 @@ AC_CHECK_FUNCS(strcasecmp,,[AC_CHECK_FUNCS(stricmp)])
 AC_CHECK_FUNCS(strncasecmp,,[AC_CHECK_FUNCS(strnicmp)])
 AC_CHECK_FUNCS(strcasestr,,[AC_CHECK_FUNCS(stristr)])
 AC_FUNC_ALLOCA
+AC_CHECK_FUNCS(fcntl)
 
 AH_BOTTOM([#include <vlc_fixups.h>])
 

modules/access/file.c

@@ -350,7 +350,7 @@ static int open_file (access_t *p_access, const char *path)
         return -1;
     }
 
-#if defined(HAVE_FCNTL_H)
+#if defined(HAVE_FCNTL)
     fcntl (fd, F_SETFD, fcntl (fd, F_GETFD) | FD_CLOEXEC);
 
     /* We'd rather use any available memory for reading ahead