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-rw-r--r--posix/getopt.c3
1 files changed, 2 insertions, 1 deletions
diff --git a/posix/getopt.c b/posix/getopt.c
index a160a4e..128dc7f 100644
--- a/posix/getopt.c
+++ b/posix/getopt.c
@@ -45,7 +45,8 @@
# define _(msgid) gettext (msgid)
/* When used standalone, flockfile and funlockfile might not be
available. */
-# ifndef _POSIX_THREAD_SAFE_FUNCTIONS
+# if (!defined _POSIX_THREAD_SAFE_FUNCTIONS \
+ || (defined _WIN32 && ! defined __CYGWIN__))
# define flockfile(fp) /* nop */
# define funlockfile(fp) /* nop */
# endif