From 20b35ec4eaec1a51183fbe9957bece68d31576d7 Mon Sep 17 00:00:00 2001
From: Thomas Krijnen <t.krijnen@gmail.com>
Date: Sun, 8 Jul 2018 11:08:07 +0200
Subject: [PATCH] Preprocessor stuff for stp and igs serializers

---
 src/ifcconvert/IfcConvert.cpp    |  8 +++++++-
 src/serializers/IgesSerializer.h | 10 ++++++++++
 2 files changed, 17 insertions(+), 1 deletion(-)

diff --git a/src/ifcconvert/IfcConvert.cpp b/src/ifcconvert/IfcConvert.cpp
index 0a46961a3d..8d8ad7293b 100644
--- a/src/ifcconvert/IfcConvert.cpp
+++ b/src/ifcconvert/IfcConvert.cpp
@@ -35,9 +35,12 @@
 
 #include "../ifcgeom_schema_agnostic/IfcGeomIterator.h"
 
-#include <IGESControl_Controller.hxx>
 #include <Standard_Version.hxx>
 
+#if OCC_VERSION_HEX < 0x60900
+#include <IGESControl_Controller.hxx>
+#endif
+
 #include <boost/program_options.hpp>
 
 #include <fstream>
@@ -562,7 +565,10 @@ int main(int argc, char** argv)
 	} else if (output_extension == ".stp") {
 		serializer = new StepSerializer(output_temp_filename, settings);
 	} else if (output_extension == ".igs") {
+#if OCC_VERSION_HEX < 0x60900
+		// According to https://tracker.dev.opencascade.org/view.php?id=25689 something has been fixed in 6.9.0
 		IGESControl_Controller::Init(); // work around Open Cascade bug
+#endif
 		serializer = new IgesSerializer(output_temp_filename, settings);
 	} else if (output_extension == ".svg") {
 		settings.set(IfcGeom::IteratorSettings::DISABLE_TRIANGULATION, true);
diff --git a/src/serializers/IgesSerializer.h b/src/serializers/IgesSerializer.h
index 7f608d9e53..93fca9b514 100644
--- a/src/serializers/IgesSerializer.h
+++ b/src/serializers/IgesSerializer.h
@@ -21,9 +21,15 @@
 #define IGESSERIALIZER_H
 
 #include "OpenCascadeBasedSerializer.h"
+#include "../ifcparse/IfcLogger.h"
 
 #include <IGESControl_Writer.hxx>
+
+#ifndef HAVE_CONFIG_H
+/// @note this is brittle, but apparently the only way to differentiate OCCT
+/// from OCE. In the latter including this header fails for some versions.
 #include <Interface_Static.hxx>
+#endif
 
 class IgesSerializer : public OpenCascadeBasedSerializer
 {
@@ -45,8 +51,12 @@ public:
 	void setUnitNameAndMagnitude(const std::string& /*name*/, float magnitude) {
 		const char* symbol = getSymbolForUnitMagnitude(magnitude);
 		if (symbol) {
+#ifdef HAVE_CONFIG_H
+			Logger::Warning("Setting IGES units not supported on OCE");
+#else
 			Interface_Static::SetCVal("xstep.cascade.unit", symbol);
 			Interface_Static::SetCVal("write.iges.unit", symbol);
+#endif
 		}
 	}
 };