Found by ./autobuild.sh during a mingw cross-compile: Commit 8a96e87 was not innocuous - glibc happens to leak the definition of time() through other headers, so that even without <sys/select.h>, virrandom.c compiled just fine. But on mingw, we were not so lucky; <sys/select.h> was important for its side effect of dragging in <time.h>, and we now have nothing providing the declaration of time(): ../../src/util/virrandom.c: In function 'virRandomOnceInit': ../../src/util/virrandom.c:65:5: error: implicit declaration of function 'time' [-Werror=implicit-function-declaration] unsigned int seed = time(NULL) ^ getpid(); ^ ../../src/util/virrandom.c:65:5: error: nested extern declaration of 'time' [-Werror=nested-externs] Signed-off-by: Eric Blake <eblake(a)redhat.com&gt; --- Pushing under the build-breaker rule. src/util/virrandom.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/src/util/virrandom.c b/src/util/virrandom.c index 4301f3f..67a8bd0 100644 --- a/src/util/virrandom.c +++ b/src/util/virrandom.c @@ -1,5 +1,5 @@ /* - * Copyright (C) 2012-2014 Red Hat, Inc. + * Copyright (C) 2012-2015 Red Hat, Inc. * * This library is free software; you can redistribute it and/or * modify it under the terms of the GNU Lesser General Public @@ -25,6 +25,7 @@ #include <inttypes.h> #include <math.h> #include <strings.h> +#include <time.h> #include "virrandom.h" #include "virthread.h" -- 2.1.0