test: Include unistd.h for getpid

diff --git a/unittest/main.cpp b/unittest/main.cpp
index 2407eb0646f38a3b37af65445966a5bd1031da1a..37d3ec84b7f8d9ecc225e84e5082e5fada3093f4 100644 (file)
--- a/unittest/main.cpp
+++ b/unittest/main.cpp
@@ -25,6 +25,10 @@
 #define DOCTEST_CONFIG_IMPLEMENT
 #include <doctest.h>
 
+#ifdef HAVE_UNISTD_H
+#  include <unistd.h>
+#endif
+
 namespace fs = util::filesystem;
 
 int