+ fix various warnings

src/Mod/Path/App/Path.cpp

@@ -92,7 +92,7 @@ void Toolpath::insertCommand(const Command &Cmd, int pos)
 {
     if (pos == -1) {
         addCommand(Cmd);
-    } else if (pos <= vpcCommands.size()) {
+    } else if (pos <= static_cast<int>(vpcCommands.size())) {
         Command *tmp = new Command(Cmd);
         vpcCommands.insert(vpcCommands.begin()+pos,tmp);
     } else {
@@ -106,7 +106,7 @@ void Toolpath::deleteCommand(int pos)
     if (pos == -1) {
         //delete(*vpcCommands.rbegin()); // causes crash
         vpcCommands.pop_back();
-    } else if (pos <= vpcCommands.size()) {
+    } else if (pos <= static_cast<int>(vpcCommands.size())) {
         vpcCommands.erase (vpcCommands.begin()+pos);
     } else {
         throw Base::Exception("Index not in range");

src/Mod/Path/Gui/TaskDlgPathCompound.cpp

@@ -134,7 +134,7 @@ bool TaskDlgPathCompound::accept()
     Path::FeatureCompound* pcCompound = static_cast<Path::FeatureCompound*>(CompoundView->getObject());
     App::Document* pcDoc = static_cast<App::Document*>(pcCompound->getDocument());
     std::vector<std::string> names = parameter->getList();
-    for(int i = 0; i < names.size(); i++)
+    for(std::size_t i = 0; i < names.size(); i++)
     {
         App::DocumentObject* pcPath = static_cast<App::DocumentObject*>(pcDoc->getObject(names[i].c_str()));
         paths.push_back(pcPath);

src/Mod/Path/Gui/ViewProviderPath.cpp

@@ -274,7 +274,7 @@ void ViewProviderPath::updateData(const App::Property* prop)
                 else
                     norm.Set(0,0,1);
                 Base::Vector3d center = (last + cmd.getCenter());
-                double radius = (last - center).Length();
+                //double radius = (last - center).Length();
                 double angle = (next - center).GetAngle(last - center);
                 // BUGGY: not needed anyway?
                 //Base::Vector3d anorm = (last - center) % (next - center);
@@ -308,7 +308,7 @@ void ViewProviderPath::updateData(const App::Property* prop)
                 
             } else if ((name=="G81")||(name=="G82")||(name=="G83")||(name=="G84")||(name=="G85")||(name=="G86")||(name=="G89")){
                 // drill,tap,bore
-                double r;
+                double r = 0;
                 if (cmd.has("R"))
                     r = cmd.getValue("R");
                 Base::Vector3d p1(next.x,next.y,last.z);

src/Mod/Path/libarea/Area.h

@@ -82,7 +82,7 @@ public:
 	void Offset(double inwards_value);
 	void Thicken(double value);
 	void FitArcs();
-	unsigned int num_curves(){return m_curves.size();}
+	unsigned int num_curves(){return static_cast<unsigned int>(m_curves.size());}
 	Point NearestPoint(const Point& p)const;
 	void GetBox(CBox2D &box);
 	void Reorder();

src/Mod/Path/libarea/AreaPocket.cpp

@@ -428,17 +428,16 @@ void recur(std::list<CArea> &arealist, const CArea& a1, const CAreaPocketParams
 static CArea make_obround(const Point& p0, const Point& p1, double radius)
 {
     Point dir = p1 - p0;
-    double d = dir.length();
     dir.normalize();
     Point right(dir.y, -dir.x);
     CArea obround;
     CCurve c;
-	if(fabs(radius) < 0.0000001)radius = (radius > 0.0) ? 0.002 : (-0.002);
+    if(fabs(radius) < 0.0000001)radius = (radius > 0.0) ? 0.002 : (-0.002);
     Point vt0 = p0 + right * radius;
     Point vt1 = p1 + right * radius;
     Point vt2 = p1 - right * radius;
     Point vt3 = p0 - right * radius;
-	c.append(vt0);
+    c.append(vt0);
     c.append(vt1);
     c.append(CVertex(1, vt2, p1));
     c.append(vt3);
@@ -446,12 +445,12 @@ static CArea make_obround(const Point& p0, const Point& p1, double radius)
     obround.append(c);
     return obround;
 }
-    
+
 static bool feed_possible(const CArea &area_for_feed_possible, const Point& p0, const Point& p1, double tool_radius)
 {
     CArea obround = make_obround(p0, p1, tool_radius);
     obround.Subtract(area_for_feed_possible);
-	return obround.m_curves.size() == 0;
+    return obround.m_curves.empty();
 }
 
 void MarkOverlappingOffsetIslands(std::list<IslandAndOffset> &offset_islands)

src/Mod/Path/libarea/Curve.cpp

@@ -86,7 +86,7 @@ bool CCurve::CheckForArc(const CVertex& prev_vt, std::list<const CVertex*>& migh
 	if(might_be_an_arc.size() < 2)return false;
 
 	// find middle point
-	int num = might_be_an_arc.size();
+	int num = static_cast<int>(might_be_an_arc.size());
 	int i = 0;
 	const CVertex* mid_vt = NULL;
 	int mid_i = (num-1)/2;
@@ -465,7 +465,7 @@ void CCurve::ChangeStart(const Point &p) {
 
 	bool started = false;
 	bool finished = false;
-	int start_span;
+	int start_span = 0;
 	bool closed = IsClosed();
 
 	for(int i = 0; i < (closed ? 2:1); i++)
@@ -911,7 +911,6 @@ double CCurve::PointToPerim(const Point& p)const
 {
 	double best_dist = 0.0;
 	double perim_at_best_dist = 0.0;
-	Point best_point = Point(0, 0);
 	bool best_dist_found = false;
 
 	double perim = 0.0;

src/Mod/Path/libarea/PythonStuff.cpp

@@ -33,6 +33,13 @@ THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 #include "Point.h"
 #include "kurve/geometry.h"
 
+#if defined (_POSIX_C_SOURCE)
+#   undef    _POSIX_C_SOURCE
+#endif
+#if defined (_XOPEN_SOURCE)
+#   undef    _XOPEN_SOURCE
+#endif
+
 #if _DEBUG
 #undef _DEBUG
 #include <Python.h>
@@ -86,7 +93,7 @@ boost::python::tuple transformed_point(const geoff_geometry::Matrix &matrix, dou
 
 static void print_curve(const CCurve& c)
 {
-	unsigned int nvertices = c.m_vertices.size();
+	std::size_t nvertices = c.m_vertices.size();
 	printf("number of vertices = %d\n", nvertices);
 	int i = 0;
 	for(std::list<CVertex>::const_iterator It = c.m_vertices.begin(); It != c.m_vertices.end(); It++, i++)
@@ -109,7 +116,7 @@ static void print_area(const CArea &a)
 
 static unsigned int num_vertices(const CCurve& curve)
 {
-	return curve.m_vertices.size();
+	return static_cast<int>(curve.m_vertices.size());
 }
 
 static CVertex FirstVertex(const CCurve& curve)