missing includes, fixes clang

graphics/ipe/patches/patch-src_ipe6upgrade_ipe6upgrade_cpp

@@ -0,0 +1,14 @@
+$OpenBSD: patch-src_ipe6upgrade_ipe6upgrade_cpp,v 1.1 2017/05/07 20:35:07 espie Exp $
+
+Index: src/ipe6upgrade/ipe6upgrade.cpp
+--- src/ipe6upgrade/ipe6upgrade.cpp.orig
++++ src/ipe6upgrade/ipe6upgrade.cpp
+@@ -30,6 +30,8 @@
+ 
+ #include "ipexml.h"
+ #include "ipeattributes.h"
++#include <cstdlib>
++using std::exit;
+ 
+ using namespace ipe;
+ 

graphics/ipe/patches/patch-src_ipeextract_ipeextract_cpp

@@ -0,0 +1,14 @@
+$OpenBSD: patch-src_ipeextract_ipeextract_cpp,v 1.1 2017/05/07 20:35:07 espie Exp $
+
+Index: src/ipeextract/ipeextract.cpp
+--- src/ipeextract/ipeextract.cpp.orig
++++ src/ipeextract/ipeextract.cpp
+@@ -31,6 +31,8 @@
+ #include "ipexml.h"
+ #include "ipeutils.h"
+ #include "ipepdfparser.h"
++#include <cstdlib>
++using std::exit;
+ 
+ using namespace ipe;
+ 

graphics/ipe/patches/patch-src_ipelib_ipebase_cpp

@@ -0,0 +1,13 @@
+$OpenBSD: patch-src_ipelib_ipebase_cpp,v 1.1 2017/05/07 20:35:07 espie Exp $
+
+Index: src/ipelib/ipebase.cpp
+--- src/ipelib/ipebase.cpp.orig
++++ src/ipelib/ipebase.cpp
+@@ -30,6 +30,7 @@
+ 
+ #include "ipebase.h"
+ #include <cmath>
++#include <cstdlib>
+ 
+ using namespace ipe;
+ 

graphics/ipe/patches/patch-src_ipelib_ipelatex_cpp

@@ -0,0 +1,22 @@
+$OpenBSD: patch-src_ipelib_ipelatex_cpp,v 1.1 2017/05/07 20:35:07 espie Exp $
+
+Index: src/ipelib/ipelatex.cpp
+--- src/ipelib/ipelatex.cpp.orig
++++ src/ipelib/ipelatex.cpp
+@@ -34,6 +34,7 @@
+ 
+ #include "ipefontpool.h"
+ #include "ipelatex.h"
++#include <cstdlib>
+ 
+ using namespace ipe;
+ 
+@@ -149,7 +150,7 @@ int Latex::scanPage(Page *page)
+ */
+ int Latex::createLatexSource(Stream &stream, String preamble)
+ {
+-  bool ancient = (getenv("IPEANCIENTPDFTEX") != 0);
++  bool ancient = (std::getenv("IPEANCIENTPDFTEX") != 0);
+   int count = 0;
+   stream << "\\pdfcompresslevel0\n"
+ 	 << "\\nonstopmode\n"

graphics/ipe/patches/patch-src_ipelib_ipepdfparser_cpp

@@ -0,0 +1,13 @@
+$OpenBSD: patch-src_ipelib_ipepdfparser_cpp,v 1.1 2017/05/07 20:35:07 espie Exp $
+
+Index: src/ipelib/ipepdfparser.cpp
+--- src/ipelib/ipepdfparser.cpp.orig
++++ src/ipelib/ipepdfparser.cpp
+@@ -30,6 +30,7 @@
+ 
+ #include "ipepdfparser.h"
+ #include "ipeutils.h"
++#include <cstdlib>
+ 
+ using namespace ipe;
+ 

graphics/ipe/patches/patch-src_ipetoipe_ipetoipe_cpp

@@ -0,0 +1,14 @@
+$OpenBSD: patch-src_ipetoipe_ipetoipe_cpp,v 1.1 2017/05/07 20:35:07 espie Exp $
+
+Index: src/ipetoipe/ipetoipe.cpp
+--- src/ipetoipe/ipetoipe.cpp.orig
++++ src/ipetoipe/ipetoipe.cpp
+@@ -29,6 +29,8 @@
+ */
+ 
+ #include "ipedoc.h"
++#include <cstdlib>
++using std::exit;
+ 
+ using ipe::Document;
+ using ipe::String;