https://bugs.gentoo.org/764113
--- a/src/IniConfig.cpp
+++ b/src/IniConfig.cpp
@@ -36,6 +36,7 @@
 #  include <sys/types.h>
 #  include <sys/stat.h>  /* mkdir */
 #  include <dirent.h>    /* opendir */
+#  include <limits.h>
 #else
 #  include <windows.h>
 #endif