~ chicken-core (chicken-5) 59caefbb270c9167e059f04a9e8568799b5e258f

commit 59caefbb270c9167e059f04a9e8568799b5e258f
Author:     felix <felix@call-with-current-continuation.org>
AuthorDate: Fri Nov 3 19:06:15 2017 +0100
Commit:     felix <felix@call-with-current-continuation.org>
CommitDate: Fri Nov 3 19:06:15 2017 +0100

    use /dev/urandom on cygwin

diff --git a/runtime.c b/runtime.c
index b7c06c2a..0bbefb25 100644
--- a/runtime.c
+++ b/runtime.c
@@ -12535,7 +12535,7 @@ C_i_pending_interrupt(C_word dummy)
 # include <sys/systm.h>
 #endif
 
-#ifdef _WIN32
+#if defined(_WIN32) && !defined(__CYGWIN__)
 # define RtlGenRandom SystemFunction036
 # if defined(__cplusplus)
 extern "C"
@@ -12555,7 +12555,7 @@ C_word C_random_bytes(C_word buf, C_word size)
   do {
     r = getrandom(C_data_pointer(buf), count, 0);
   } while(r < 0 && (errno == EINTR));
-#elif defined(_WIN32)
+#elif defined(_WIN32) && !defined(__CYGWIN__)
   if(!RtlGenRandom((PVOID)C_data_pointer(buf), (LONG)count)) 
     r = -1;
 #else