https://bugs.gentoo.org/790776
--- a/src/exportvector.cpp
+++ b/src/exportvector.cpp
@@ -4,6 +4,7 @@
 // Copyright 2008-2013 Jonathan Westhues.
 //-----------------------------------------------------------------------------
 #include <libdxfrw.h>
+#include <limits>
 #include "solvespace.h"
 
 VectorFileWriter::~VectorFileWriter() {
--- a/src/importdxf.cpp
+++ b/src/importdxf.cpp
@@ -1,3 +1,5 @@
+#include <limits>
+
 #include "solvespace.h"
 #include "libdxfrw.h"
 #include "libdwgr.h"