CheckWorkingKqueue.cmake: fix missing headers

Avoid implicitly declaring functions memset() and exit()
as it is considered an error by some compilers
(e.g. Xcode clang 12 and later)

diff --git a/cmake/CheckWorkingKqueue.cmake b/cmake/CheckWorkingKqueue.cmake
index f22f011b5875020a5c060a1d8e045ca099c3d0c9..2f482783c6cfe2c2005261854291dc5641030f7e 100644 (file)
--- a/cmake/CheckWorkingKqueue.cmake
+++ b/cmake/CheckWorkingKqueue.cmake
@@ -2,6 +2,8 @@ include(CheckCSourceRuns)
 
 check_c_source_runs(
 "
+#include <stdlib.h>
+#include <string.h>
 #include <sys/types.h>
 #include <sys/time.h>
 #include <sys/event.h>