CAM: use CMake to generate precompiled headers on all platforms

"Professional CMake" book suggest the following: "Targets should build successfully with or without compiler support for precompiled headers. It should be considered an optimization, not a requirement. In particular, do not explicitly include a precompile header (e.g. stdafx.h) in the source code, let CMake force-include an automatically generated precompile header on the compiler command line instead. This is more portable across the major compilers and is likely to be easier to maintain. It will also avoid warnings being generated from certain code checking tools like iwyu (include what you use)." Therefore, removed the "#include <PreCompiled.h>" from sources, also there is no need for the "#ifdef _PreComp_" anymore
2025-09-21 23:36:45 +02:00
parent 63a8d31bb6
commit 6bd5c9737d
54 changed files with 32 additions and 226 deletions
--- a/src/Mod/CAM/App/AppPath.cpp
+++ b/src/Mod/CAM/App/AppPath.cpp
@@ -20,7 +20,6 @@
 *                                                                         *
 ***************************************************************************/

-#include "PreCompiled.h"

 #include <Base/Console.h>
 #include <Base/Interpreter.h>
--- a/src/Mod/CAM/App/AppPathPy.cpp
+++ b/src/Mod/CAM/App/AppPathPy.cpp
@@ -20,8 +20,6 @@
 *                                                                         *
 ***************************************************************************/

-#include "PreCompiled.h"
-#ifndef _PreComp_
 #include <BRep_Tool.hxx>
 #include <BRepAdaptor_Curve.hxx>
 #include <gp_Circ.hxx>
@@ -31,7 +29,7 @@
 #include <TopoDS_Shape.hxx>
 #include <TopoDS_Vertex.hxx>
 #include <TopExp_Explorer.hxx>
-#endif
+

 #include <App/Application.h>
 #include <App/Document.h>
--- a/src/Mod/CAM/App/Area.cpp
+++ b/src/Mod/CAM/App/Area.cpp
@@ -20,12 +20,10 @@
 *                                                                          *
 ****************************************************************************/

-#include "PreCompiled.h"

 // From Boost 1.75 on the geometry component requires C++14
 #define BOOST_GEOMETRY_DISABLE_DEPRECATED_03_WARNING

-#ifndef _PreComp_
 #include <limits>

 #include <boost/geometry.hpp>
@@ -67,7 +65,6 @@
 #include <TopExp_Explorer.hxx>
 #include <TopoDS_Compound.hxx>
 #include <TopTools_HSequenceOfShape.hxx>
-#endif

 #include <App/Application.h>
 #include <App/Document.h>
--- a/src/Mod/CAM/App/AreaPyImp.cpp
+++ b/src/Mod/CAM/App/AreaPyImp.cpp
@@ -20,7 +20,6 @@
 *                                                                          *
 ****************************************************************************/

-#include "PreCompiled.h"

 #include <Base/GeometryPyCXX.h>
 #include <Base/PyWrapParseTupleAndKeywords.h>
--- a/src/Mod/CAM/App/CMakeLists.txt
+++ b/src/Mod/CAM/App/CMakeLists.txt
@@ -42,7 +42,6 @@ SET(Python_SRCS
 SET(Mod_SRCS
    AppPath.cpp
    AppPathPy.cpp
-    PreCompiled.cpp
    PreCompiled.h
 )

@@ -128,9 +127,9 @@ endif()


 if(FREECAD_USE_PCH)
-    add_definitions(-D_PreComp_)
-    GET_MSVC_PRECOMPILED_SOURCE("PreCompiled.cpp" Path_CPP_SRCS ${Path_SRCS})
-    ADD_MSVC_PRECOMPILED_HEADER(Path PreCompiled.h PreCompiled.cpp Path_CPP_SRCS)
+    target_precompile_headers(Path PRIVATE
+            $<$<COMPILE_LANGUAGE:CXX>:"${CMAKE_CURRENT_LIST_DIR}/PreCompiled.h">
+    )
 endif(FREECAD_USE_PCH)

 SET_BIN_DIR(Path PathApp /Mod/CAM)
--- a/src/Mod/CAM/App/Command.cpp
+++ b/src/Mod/CAM/App/Command.cpp
@@ -20,12 +20,10 @@
 *                                                                         *
 ***************************************************************************/

-#include "PreCompiled.h"
-#ifndef _PreComp_
 #include <cinttypes>
 #include <iomanip>
 #include <boost/algorithm/string.hpp>
-#endif
+

 #include <Base/Exception.h>
 #include <Base/Reader.h>
--- a/src/Mod/CAM/App/CommandPyImp.cpp
+++ b/src/Mod/CAM/App/CommandPyImp.cpp
@@ -20,10 +20,8 @@
 *                                                                         *
 ***************************************************************************/

-#include "PreCompiled.h"
-#ifndef _PreComp_
 #include <boost/algorithm/string.hpp>
-#endif
+

 #include <Base/Exception.h>
 #include <Base/PlacementPy.h>
--- a/src/Mod/CAM/App/FeatureArea.cpp
+++ b/src/Mod/CAM/App/FeatureArea.cpp
@@ -20,12 +20,10 @@
 *                                                                          *
 ****************************************************************************/

-#include "PreCompiled.h"
-#ifndef _PreComp_
 #include <BRep_Builder.hxx>
 #include <Precision.hxx>
 #include <TopoDS_Compound.hxx>
-#endif
+

 #include <Base/Console.h>  // for FC_LOG_LEVEL_INIT
 #include <Base/Placement.h>
--- a/src/Mod/CAM/App/FeatureAreaPyImp.cpp
+++ b/src/Mod/CAM/App/FeatureAreaPyImp.cpp
@@ -20,7 +20,6 @@
 *                                                                          *
 ****************************************************************************/

-#include "PreCompiled.h"

 #include <Base/PyWrapParseTupleAndKeywords.h>
 #include <Mod/Part/App/TopoShapePy.h>
--- a/src/Mod/CAM/App/FeaturePath.cpp
+++ b/src/Mod/CAM/App/FeaturePath.cpp
@@ -20,7 +20,6 @@
 *                                                                         *
 ***************************************************************************/

-#include "PreCompiled.h"

 #include <App/DocumentObjectPy.h>

--- a/src/Mod/CAM/App/FeaturePathCompound.cpp
+++ b/src/Mod/CAM/App/FeaturePathCompound.cpp
@@ -20,7 +20,6 @@
 *                                                                         *
 ***************************************************************************/

-#include "PreCompiled.h"

 #include "FeaturePathCompound.h"
 #include "Command.h"
--- a/src/Mod/CAM/App/FeaturePathCompoundPyImp.cpp
+++ b/src/Mod/CAM/App/FeaturePathCompoundPyImp.cpp
@@ -20,7 +20,6 @@
 *                                                                         *
 ***************************************************************************/

-#include "PreCompiled.h"

 // inclusion of the generated files (generated out of FeaturePathCompoundPy.xml)
 #include "FeaturePathCompoundPy.h"
--- a/src/Mod/CAM/App/FeaturePathShape.cpp
+++ b/src/Mod/CAM/App/FeaturePathShape.cpp
@@ -21,11 +21,9 @@
 *                                                                         *
 ***************************************************************************/

-#include "PreCompiled.h"
-#ifndef _PreComp_
 #include <Standard_Version.hxx>
 #include <TopoDS_Shape.hxx>
-#endif
+

 #include "FeaturePathShape.h"

--- a/src/Mod/CAM/App/Path.cpp
+++ b/src/Mod/CAM/App/Path.cpp
@@ -20,7 +20,6 @@
 *                                                                         *
 ***************************************************************************/

-#include "PreCompiled.h"

 #include <App/Application.h>
 #include <Base/Console.h>
--- a/src/Mod/CAM/App/PathPyImp.cpp
+++ b/src/Mod/CAM/App/PathPyImp.cpp
@@ -20,7 +20,6 @@
 *                                                                         *
 ***************************************************************************/

-#include "PreCompiled.h"

 #include "Base/GeometryPyCXX.h"

--- a/src/Mod/CAM/App/PathSegmentWalker.cpp
+++ b/src/Mod/CAM/App/PathSegmentWalker.cpp
@@ -19,7 +19,6 @@
 *                                                                         *
 ***************************************************************************/

-#include "PreCompiled.h"

 #include <vector>

--- a/src/Mod/CAM/App/PreCompiled.cpp
+++ b/src/Mod/CAM/App/PreCompiled.cpp
@@ -1,24 +0,0 @@
-/***************************************************************************
- *   Copyright (c) 2014 Yorik van Havre <yorik@uncreated.net>              *
- *                                                                         *
- *   This file is part of the FreeCAD CAx development system.              *
- *                                                                         *
- *   This library is free software; you can redistribute it and/or         *
- *   modify it under the terms of the GNU Library General Public           *
- *   License as published by the Free Software Foundation; either          *
- *   version 2 of the License, or (at your option) any later version.      *
- *                                                                         *
- *   This library  is distributed in the hope that it will be useful,      *
- *   but WITHOUT ANY WARRANTY; without even the implied warranty of        *
- *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         *
- *   GNU Library General Public License for more details.                  *
- *                                                                         *
- *   You should have received a copy of the GNU Library General Public     *
- *   License along with this library; see the file COPYING.LIB. If not,    *
- *   write to the Free Software Foundation, Inc., 59 Temple Place,         *
- *   Suite 330, Boston, MA  02111-1307, USA                                *
- *                                                                         *
- ***************************************************************************/
-
-
-#include "PreCompiled.h"
--- a/src/Mod/CAM/App/PreCompiled.h
+++ b/src/Mod/CAM/App/PreCompiled.h
@@ -25,19 +25,6 @@

 #include <FCConfig.h>

-// Exporting of App classes
-#ifdef FC_OS_WIN32
-#define PathExport __declspec(dllexport)
-// # define RobotExport __declspec(dllexport) uncomment this to use KDL
-#define PartExport __declspec(dllimport)
-#else  // for Linux
-#define PathExport
-// # define RobotExport uncomment this to use KDL
-#define PartExport
-#endif
-
-#ifdef _PreComp_
-
 // standard
 #include <cinttypes>
 #include <iomanip>
@@ -97,5 +84,4 @@
 #include <TopExp_Explorer.hxx>
 #include <TopTools_HSequenceOfShape.hxx>

-#endif  // _PreComp_
 #endif
--- a/src/Mod/CAM/App/PropertyPath.cpp
+++ b/src/Mod/CAM/App/PropertyPath.cpp
@@ -20,10 +20,8 @@
 *                                                                         *
 ***************************************************************************/

-#include "PreCompiled.h"
-#ifndef _PreComp_
 #include <sstream>
-#endif
+

 #include <App/DocumentObject.h>
 #include <App/PropertyContainer.h>
--- a/src/Mod/CAM/App/Voronoi.cpp
+++ b/src/Mod/CAM/App/Voronoi.cpp
@@ -20,10 +20,6 @@
 *                                                                         *
 ***************************************************************************/

-#include "PreCompiled.h"
-#ifndef _PreComp_
-#endif
-
 #include <Base/Vector3D.h>
 #include <Base/Tools.h>

--- a/src/Mod/CAM/App/VoronoiCell.cpp
+++ b/src/Mod/CAM/App/VoronoiCell.cpp
@@ -20,7 +20,6 @@
 *                                                                         *
 ***************************************************************************/

-#include "PreCompiled.h"

 #include "VoronoiCell.h"

--- a/src/Mod/CAM/App/VoronoiCellPyImp.cpp
+++ b/src/Mod/CAM/App/VoronoiCellPyImp.cpp
@@ -20,7 +20,6 @@
 *                                                                         *
 ***************************************************************************/

-#include "PreCompiled.h"

 #include "Base/Vector3D.h"
 #include "Base/VectorPy.h"
--- a/src/Mod/CAM/App/VoronoiEdge.cpp
+++ b/src/Mod/CAM/App/VoronoiEdge.cpp
@@ -20,7 +20,6 @@
 *                                                                         *
 ***************************************************************************/

-#include "PreCompiled.h"

 #include "VoronoiEdge.h"

--- a/src/Mod/CAM/App/VoronoiEdgePyImp.cpp
+++ b/src/Mod/CAM/App/VoronoiEdgePyImp.cpp
@@ -20,12 +20,11 @@
 *                                                                         *
 ***************************************************************************/

-#include "PreCompiled.h"
-#ifndef _PreComp_
 #include <limits>
+
 #include <BRepBuilderAPI_MakeEdge.hxx>
 #include <Geom_Parabola.hxx>
-#endif
+

 #include "Mod/Part/App/Geometry.h"
 #include "Mod/Part/App/TopoShapeEdgePy.h"
--- a/src/Mod/CAM/App/VoronoiPyImp.cpp
+++ b/src/Mod/CAM/App/VoronoiPyImp.cpp
@@ -20,7 +20,6 @@
 *                                                                         *
 ***************************************************************************/

-#include "PreCompiled.h"

 #include "Base/GeometryPyCXX.h"
 #include "Base/Vector3D.h"
--- a/src/Mod/CAM/App/VoronoiVertex.cpp
+++ b/src/Mod/CAM/App/VoronoiVertex.cpp
@@ -20,7 +20,6 @@
 *                                                                         *
 ***************************************************************************/

-#include "PreCompiled.h"

 #include "VoronoiVertex.h"

--- a/src/Mod/CAM/App/VoronoiVertexPyImp.cpp
+++ b/src/Mod/CAM/App/VoronoiVertexPyImp.cpp
@@ -20,7 +20,6 @@
 *                                                                         *
 ***************************************************************************/

-#include "PreCompiled.h"

 #include "Base/Vector3D.h"
 #include "Base/VectorPy.h"
--- a/src/Mod/CAM/Gui/AppPathGui.cpp
+++ b/src/Mod/CAM/Gui/AppPathGui.cpp
@@ -20,7 +20,6 @@
 *                                                                         *
 ***************************************************************************/

-#include "PreCompiled.h"

 #include <Base/Console.h>
 #include <Base/Interpreter.h>
--- a/src/Mod/CAM/Gui/AppPathGuiPy.cpp
+++ b/src/Mod/CAM/Gui/AppPathGuiPy.cpp
@@ -20,11 +20,9 @@
 *                                                                         *
 ***************************************************************************/

-#include "PreCompiled.h"
-#ifndef _PreComp_
 #include <QDir>
 #include <QFileInfo>
-#endif
+

 #include <App/Application.h>
 #include <App/Document.h>
--- a/src/Mod/CAM/Gui/CMakeLists.txt
+++ b/src/Mod/CAM/Gui/CMakeLists.txt
@@ -24,7 +24,6 @@ SET(PathGui_SRCS_Module
    AppPathGui.cpp
    AppPathGuiPy.cpp
    Resources/Path.qrc
-    PreCompiled.cpp
    PreCompiled.h
    DlgSettingsPathColor.ui
    DlgSettingsPathColor.cpp
@@ -59,17 +58,18 @@ SET(PathGui_SRCS
    ${PathGui_SRCS_ViewProvider}
 )

-if(FREECAD_USE_PCH)
-    add_definitions(-D_PreComp_)
-    GET_MSVC_PRECOMPILED_SOURCE("PreCompiled.cpp" PCH_SRCS ${PathGui_SRCS})
-    ADD_MSVC_PRECOMPILED_HEADER(PathGui PreCompiled.h PreCompiled.cpp PCH_SRCS)
-endif(FREECAD_USE_PCH)
-
 SET(PathGuiIcon_SVG
    Resources/icons/CAMWorkbench.svg
 )

 add_library(PathGui SHARED ${PathGui_SRCS} ${PathGuiIcon_SVG})
+
+if(FREECAD_USE_PCH)
+    target_precompile_headers(PathGui PRIVATE
+            $<$<COMPILE_LANGUAGE:CXX>:"${CMAKE_CURRENT_LIST_DIR}/PreCompiled.h">
+    )
+endif(FREECAD_USE_PCH)
+
 target_include_directories(
    PathGui
    PRIVATE
--- a/src/Mod/CAM/Gui/Command.cpp
+++ b/src/Mod/CAM/Gui/Command.cpp
@@ -20,10 +20,8 @@
 *                                                                         *
 ***************************************************************************/

-#include "PreCompiled.h"
-#ifndef _PreComp_
 #include <TopExp_Explorer.hxx>
-#endif
+

 #include <Base/Console.h>
 #include <Gui/Application.h>
--- a/src/Mod/CAM/Gui/DlgProcessorChooser.cpp
+++ b/src/Mod/CAM/Gui/DlgProcessorChooser.cpp
@@ -20,10 +20,8 @@
 *                                                                         *
 ***************************************************************************/

-#include "PreCompiled.h"
-#ifndef _PreComp_
 #include <QDialog>
-#endif
+

 #include <Gui/MainWindow.h>

--- a/src/Mod/CAM/Gui/DlgSettingsPathColor.cpp
+++ b/src/Mod/CAM/Gui/DlgSettingsPathColor.cpp
@@ -20,7 +20,6 @@
 *                                                                         *
 ***************************************************************************/

-#include "PreCompiled.h"

 #include "DlgSettingsPathColor.h"
 #include "ui_DlgSettingsPathColor.h"
--- a/src/Mod/CAM/Gui/PreCompiled.cpp
+++ b/src/Mod/CAM/Gui/PreCompiled.cpp
@@ -1,23 +0,0 @@
-/***************************************************************************
- *   Copyright (c) 2014 Yorik van Havre <yorik@uncreated.net>              *
- *                                                                         *
- *   This file is part of the FreeCAD CAx development system.              *
- *                                                                         *
- *   This library is free software; you can redistribute it and/or         *
- *   modify it under the terms of the GNU Library General Public           *
- *   License as published by the Free Software Foundation; either          *
- *   version 2 of the License, or (at your option) any later version.      *
- *                                                                         *
- *   This library  is distributed in the hope that it will be useful,      *
- *   but WITHOUT ANY WARRANTY; without even the implied warranty of        *
- *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         *
- *   GNU Library General Public License for more details.                  *
- *                                                                         *
- *   You should have received a copy of the GNU Library General Public     *
- *   License along with this library; see the file COPYING.LIB. If not,    *
- *   write to the Free Software Foundation, Inc., 59 Temple Place,         *
- *   Suite 330, Boston, MA  02111-1307, USA                                *
- *                                                                         *
- ***************************************************************************/
-
-#include "PreCompiled.h"
--- a/src/Mod/CAM/Gui/PreCompiled.h
+++ b/src/Mod/CAM/Gui/PreCompiled.h
@@ -25,21 +25,6 @@

 #include <FCConfig.h>

-// Importing of App classes
-#ifdef FC_OS_WIN32
-#define PartExport __declspec(dllimport)
-#define PathExport __declspec(dllimport)
-#define PartGuiExport __declspec(dllexport)
-#define PathGuiExport __declspec(dllexport)
-#else  // for Linux
-#define PartExport
-#define PathExport
-#define PartGuiExport
-#define PathGuiExport
-#endif
-
-#ifdef _PreComp_
-
 // boost
 #include <boost/algorithm/string/replace.hpp>

@@ -65,6 +50,4 @@
 #include <Inventor/nodes/SoSwitch.h>
 #include <Inventor/nodes/SoTransform.h>

-#endif  //_PreComp_
-
 #endif  // PATHGUI_PRECOMPILED_H
--- a/src/Mod/CAM/Gui/TaskDlgPathCompound.cpp
+++ b/src/Mod/CAM/Gui/TaskDlgPathCompound.cpp
@@ -20,11 +20,9 @@
 *                                                                         *
 ***************************************************************************/

-#include "PreCompiled.h"

-#ifndef _PreComp_
 #include <QRegularExpression>
-#endif
+

 #include <App/Document.h>
 #include <App/DocumentObject.h>
--- a/src/Mod/CAM/Gui/ViewProviderArea.cpp
+++ b/src/Mod/CAM/Gui/ViewProviderArea.cpp
@@ -20,7 +20,6 @@
 *                                                                          *
 ****************************************************************************/

-#include "PreCompiled.h"

 #include <Gui/Application.h>
 #include <Mod/CAM/App/FeatureArea.h>
--- a/src/Mod/CAM/Gui/ViewProviderPath.cpp
+++ b/src/Mod/CAM/Gui/ViewProviderPath.cpp
@@ -20,9 +20,6 @@
 *                                                                         *
 ***************************************************************************/

-#include "PreCompiled.h"
-
-#ifndef _PreComp_
 #include <limits>
 #include <boost/algorithm/string/replace.hpp>

@@ -37,7 +34,6 @@
 #include <Inventor/nodes/SoSeparator.h>
 #include <Inventor/nodes/SoSwitch.h>
 #include <Inventor/nodes/SoTransform.h>
-#endif

 #include <App/Application.h>
 #include <App/DocumentObject.h>
--- a/src/Mod/CAM/Gui/ViewProviderPathCompound.cpp
+++ b/src/Mod/CAM/Gui/ViewProviderPathCompound.cpp
@@ -20,7 +20,6 @@
 *                                                                         *
 ***************************************************************************/

-#include "PreCompiled.h"

 #include <Gui/BitmapFactory.h>
 #include <Gui/Control.h>
--- a/src/Mod/CAM/Gui/ViewProviderPathShape.cpp
+++ b/src/Mod/CAM/Gui/ViewProviderPathShape.cpp
@@ -20,7 +20,6 @@
 *                                                                         *
 ***************************************************************************/

-#include "PreCompiled.h"

 #include <Gui/Application.h>
 #include <Gui/BitmapFactory.h>
--- a/src/Mod/CAM/PathSimulator/App/AppPathSimulator.cpp
+++ b/src/Mod/CAM/PathSimulator/App/AppPathSimulator.cpp
@@ -20,7 +20,6 @@
 *                                                                         *
 ***************************************************************************/

-#include "PreCompiled.h"

 #include <Base/Console.h>
 #include <Base/Interpreter.h>
--- a/src/Mod/CAM/PathSimulator/App/CMakeLists.txt
+++ b/src/Mod/CAM/PathSimulator/App/CMakeLists.txt
@@ -18,7 +18,6 @@ SET(PathSimulator_SRCS
    PathSim.h
    VolSim.cpp
    VolSim.h
-    PreCompiled.cpp
    PreCompiled.h
    ${Python_SRCS}
 )
--- a/src/Mod/CAM/PathSimulator/App/PathSim.cpp
+++ b/src/Mod/CAM/PathSimulator/App/PathSim.cpp
@@ -20,7 +20,6 @@
 *                                                                         *
 ***************************************************************************/

-#include "PreCompiled.h"

 #include "PathSim.h"

--- a/src/Mod/CAM/PathSimulator/App/PathSimPyImp.cpp
+++ b/src/Mod/CAM/PathSimulator/App/PathSimPyImp.cpp
@@ -20,7 +20,6 @@
 *                                                                         *
 ***************************************************************************/

-#include "PreCompiled.h"

 #include <Base/PlacementPy.h>
 #include <Base/PyWrapParseTupleAndKeywords.h>
--- a/src/Mod/CAM/PathSimulator/App/PreCompiled.cpp
+++ b/src/Mod/CAM/PathSimulator/App/PreCompiled.cpp
@@ -1,23 +0,0 @@
-/***************************************************************************
- *   Copyright (c) 2017 Shai Seger <shaise at gmail>                       *
- *                                                                         *
- *   This file is part of the FreeCAD CAx development system.              *
- *                                                                         *
- *   This library is free software; you can redistribute it and/or         *
- *   modify it under the terms of the GNU Library General Public           *
- *   License as published by the Free Software Foundation; either          *
- *   version 2 of the License, or (at your option) any later version.      *
- *                                                                         *
- *   This library  is distributed in the hope that it will be useful,      *
- *   but WITHOUT ANY WARRANTY; without even the implied warranty of        *
- *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         *
- *   GNU Library General Public License for more details.                  *
- *                                                                         *
- *   You should have received a copy of the GNU Library General Public     *
- *   License along with this library; see the file COPYING.LIB. If not,    *
- *   write to the Free Software Foundation, Inc., 59 Temple Place,         *
- *   Suite 330, Boston, MA  02111-1307, USA                                *
- *                                                                         *
- ***************************************************************************/
-
-#include "PreCompiled.h"
--- a/src/Mod/CAM/PathSimulator/App/PreCompiled.h
+++ b/src/Mod/CAM/PathSimulator/App/PreCompiled.h
@@ -25,7 +25,6 @@

 #include <FCConfig.h>

-#ifdef _PreComp_

 // standard
 #include <cstdio>
@@ -50,6 +49,4 @@
 // Xerces
 #include <xercesc/util/XercesDefs.hpp>

-#endif  //_PreComp_
-
 #endif
--- a/src/Mod/CAM/PathSimulator/App/VolSim.cpp
+++ b/src/Mod/CAM/PathSimulator/App/VolSim.cpp
@@ -20,10 +20,8 @@
 *                                                                         *
 ***************************************************************************/

-#include "PreCompiled.h"
-#ifndef _PreComp_
 #include <algorithm>
-#endif
+

 #include <BRepBndLib.hxx>
 #include <BRepCheck_Analyzer.hxx>
--- a/src/Mod/CAM/PathSimulator/AppGL/AppCAMSimulator.cpp
+++ b/src/Mod/CAM/PathSimulator/AppGL/AppCAMSimulator.cpp
@@ -20,7 +20,6 @@
 *                                                                         *
 ***************************************************************************/

-#include "PreCompiled.h"

 #include <Base/Console.h>
 #include <Base/Interpreter.h>
--- a/src/Mod/CAM/PathSimulator/AppGL/CAMSim.cpp
+++ b/src/Mod/CAM/PathSimulator/AppGL/CAMSim.cpp
@@ -20,11 +20,9 @@
 *                                                                         *
 ***************************************************************************/

-#include "PreCompiled.h"  // NOLINT
-#ifndef _PreComp_
 #include <string>
 #include <vector>
-#endif
+

 #include "CAMSim.h"
 #include "DlgCAMSimulator.h"
--- a/src/Mod/CAM/PathSimulator/AppGL/CAMSimPyImp.cpp
+++ b/src/Mod/CAM/PathSimulator/AppGL/CAMSimPyImp.cpp
@@ -20,7 +20,6 @@
 *                                                                         *
 ***************************************************************************/

-#include "PreCompiled.h"

 #include <Base/PlacementPy.h>
 #include <Base/PyWrapParseTupleAndKeywords.h>
--- a/src/Mod/CAM/PathSimulator/AppGL/CMakeLists.txt
+++ b/src/Mod/CAM/PathSimulator/AppGL/CMakeLists.txt
@@ -22,7 +22,6 @@ SET(CAMSimulator_SRCS_Module
    CAMSimPyImp.cpp
    DlgCAMSimulator.cpp
    DlgCAMSimulator.h
-    PreCompiled.cpp
    PreCompiled.h
 )

@@ -76,12 +75,6 @@ SET(CAMSimulator_SRCS
    ${CAMSimulator_SRCS_Core}
 )

-if(FREECAD_USE_PCH)
-    add_definitions(-D_PreComp_)
-    GET_MSVC_PRECOMPILED_SOURCE("PreCompiled.cpp" PCH_SRCS ${CAMSimulator_SRCS_precomp})
-    ADD_MSVC_PRECOMPILED_HEADER(CAMSimulator PreCompiled.h PreCompiled.cpp PCH_SRCS)
-endif(FREECAD_USE_PCH)
-
 add_library(CAMSimulator SHARED ${CAMSimulator_SRCS})
 target_include_directories(
    CAMSimulator
@@ -92,6 +85,14 @@ target_include_directories(
    ${CMAKE_CURRENT_BINARY_DIR}
 )
 target_link_libraries(CAMSimulator ${CAMSimulator_LIBS})
+
+if(FREECAD_USE_PCH)
+    target_precompile_headers(CAMSimulator PRIVATE
+            $<$<COMPILE_LANGUAGE:CXX>:"${CMAKE_CURRENT_LIST_DIR}/PreCompiled.h">
+    )
+    set_source_files_properties(${CAMSimulator_SRCS_Core} PROPERTIES SKIP_PRECOMPILE_HEADERS TRUE)
+endif(FREECAD_USE_PCH)
+
 if (FREECAD_WARN_ERROR)
    target_compile_warn_error(CAMSimulator)
 endif()
--- a/src/Mod/CAM/PathSimulator/AppGL/DlgCAMSimulator.cpp
+++ b/src/Mod/CAM/PathSimulator/AppGL/DlgCAMSimulator.cpp
@@ -20,7 +20,6 @@
 *                                                                         *
 ***************************************************************************/

-#include "PreCompiled.h"

 #include "DlgCAMSimulator.h"
 #include "MillSimulation.h"
--- a/src/Mod/CAM/PathSimulator/AppGL/PreCompiled.cpp
+++ b/src/Mod/CAM/PathSimulator/AppGL/PreCompiled.cpp
@@ -1,23 +0,0 @@
-/***************************************************************************
- *   Copyright (c) 2017 Shai Seger <shaise at gmail>                       *
- *                                                                         *
- *   This file is part of the FreeCAD CAx development system.              *
- *                                                                         *
- *   This library is free software; you can redistribute it and/or         *
- *   modify it under the terms of the GNU Library General Public           *
- *   License as published by the Free Software Foundation; either          *
- *   version 2 of the License, or (at your option) any later version.      *
- *                                                                         *
- *   This library  is distributed in the hope that it will be useful,      *
- *   but WITHOUT ANY WARRANTY; without even the implied warranty of        *
- *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         *
- *   GNU Library General Public License for more details.                  *
- *                                                                         *
- *   You should have received a copy of the GNU Library General Public     *
- *   License along with this library; see the file COPYING.LIB. If not,    *
- *   write to the Free Software Foundation, Inc., 59 Temple Place,         *
- *   Suite 330, Boston, MA  02111-1307, USA                                *
- *                                                                         *
- ***************************************************************************/
-
-#include "PreCompiled.h"
--- a/src/Mod/CAM/PathSimulator/AppGL/PreCompiled.h
+++ b/src/Mod/CAM/PathSimulator/AppGL/PreCompiled.h
@@ -25,8 +25,6 @@

 #include <FCConfig.h>

-#ifdef _PreComp_
-
 // standard
 #include <cstdio>
 #include <cassert>
@@ -50,6 +48,4 @@
 // Xerces
 #include <xercesc/util/XercesDefs.hpp>

-#endif  //_PreComp_
-
 #endif