diff --git a/examples/osgstereoimage/osgstereoimage.cpp b/examples/osgstereoimage/osgstereoimage.cpp
index aac4412ed..90dbb81e9 100644
--- a/examples/osgstereoimage/osgstereoimage.cpp
+++ b/examples/osgstereoimage/osgstereoimage.cpp
@@ -416,7 +416,7 @@ int main( int argc, char **argv )
     }
 
     float radius = 1.0f;
-    float height = 2*radius*tanf(fovy*0.5f);
+    float height = 2*radius*tan(fovy*0.5f);
     float length = osg::PI*radius;  // half a cylinder.
 
     // creat the scene from the file list.
diff --git a/examples/osgviewer/GNUmakefile b/examples/osgviewer/GNUmakefile
index be945b968..6aefc37e6 100644
--- a/examples/osgviewer/GNUmakefile
+++ b/examples/osgviewer/GNUmakefile
@@ -12,7 +12,7 @@ INSTFILES = \
 
 EXEC = osgviewer
 
-INC += $(PRODUCER_INCLUDE_DIR)
+INC += $(PRODUCER_INCLUDE_DIR) 
 LDFLAGS  += $(PRODUCER_LIB_DIR)
 
 include $(TOPDIR)/Make/makerules 
diff --git a/src/osgPlugins/GNUmakefile b/src/osgPlugins/GNUmakefile
index 84773a21d..586c2d21a 100644
--- a/src/osgPlugins/GNUmakefile
+++ b/src/osgPlugins/GNUmakefile
@@ -1,6 +1,6 @@
 TOPDIR = ../..
-include $(TOPDIR)/Make/makedirdefs
 include $(TOPDIR)/Make/makedefs
+include $(TOPDIR)/Make/makedirdefs
 
 DIRS = $(PLUGIN_DIRS)
 
diff --git a/src/osgPlugins/ac3d/ac3d.cpp b/src/osgPlugins/ac3d/ac3d.cpp
index 7720d6e75..1f2f8750b 100644
--- a/src/osgPlugins/ac3d/ac3d.cpp
+++ b/src/osgPlugins/ac3d/ac3d.cpp
@@ -6,7 +6,11 @@
 
 
 #include <stdio.h>
+#ifdef __DARWIN_OSX__
+#include <sys/malloc.h>
+#else
 #include <malloc.h>
+#endif
 #include <math.h>
 
 #include <osg/CullFace>
diff --git a/src/osgPlugins/ac3d/osgac3d.h b/src/osgPlugins/ac3d/osgac3d.h
index 428a7fac9..60a441e76 100644
--- a/src/osgPlugins/ac3d/osgac3d.h
+++ b/src/osgPlugins/ac3d/osgac3d.h
@@ -52,8 +52,12 @@ typedef struct ACObject_t
 #define Prototype
 #define Private static
 #define Boolean int
+#ifndef FALSE
 #define FALSE (0)
+#endif
+#ifndef TRUE
 #define TRUE (!FALSE)
+#endif
 #define STRING(s)  (char *)(strcpy((char *)myalloc(strlen(s)+1), s))
 #define streq(a,b)  (!strcmp(a,b))
 #define myalloc malloc
diff --git a/src/osgPlugins/dx/DXWriter.cpp b/src/osgPlugins/dx/DXWriter.cpp
index eeddf764e..712e91bf2 100644
--- a/src/osgPlugins/dx/DXWriter.cpp
+++ b/src/osgPlugins/dx/DXWriter.cpp
@@ -128,12 +128,13 @@
 #include "AreaGeoSetTriangulator.h"
 #include "StateSetStr.h"
 
+
 #if defined(__sgi) || defined(__FreeBSD__)
     #include <unistd.h>
     #include <ieeefp.h>
 #else
     #include <math.h>
-    #if (defined(WIN32) || defined (macintosh)) && !defined(__CYGWIN__)
+    #if (defined(WIN32) || defined (__DARWIN_OSX__)) && !defined(__CYGWIN__)
         #include <float.h>
     #else
         #include <unistd.h>
@@ -601,8 +602,10 @@ inline int IsNaNorInf( float f )
     case FP_PINF : return 1;
     default      : return 0;
   }
-#elif defined(__FreeBSD__) || defined(__linux) || defined(__CYGWIN__) || defined(__DARWIN_OSX__)
+#elif defined(__FreeBSD__) || defined(__linux) || defined(__CYGWIN__) 
   return isnanf(f) || isinf(f);
+#elif  defined(__DARWIN_OSX__)
+  return __isnanf(f) || __isinf(f);
 #elif defined(__sun)
   return isnan(f);  // KLUDGE - hack to get this to compile w/g++. 
 #elif defined(WIN32)
diff --git a/src/osgPlugins/geo/GNUmakefile b/src/osgPlugins/geo/GNUmakefile
index ec7b53e62..1e66c8e06 100644
--- a/src/osgPlugins/geo/GNUmakefile
+++ b/src/osgPlugins/geo/GNUmakefile
@@ -2,10 +2,12 @@ TOPDIR = ../../..
 include $(TOPDIR)/Make/makedefs 
 
 CXXFILES =\
-        geoActions.cpp\
+	geoActions.cpp\
 	ReaderWriterGEO.cpp
 
-LIBS  += -losgText -losgSim $(OSG_LIBS) $(OTHER_LIBS)
+
+##LIBS  += -losgText -losgSim $(OSG_LIBS) $(OTHER_LIBS)
+LIBS  = 
 
 TARGET_BASENAME = geo
 include $(TOPDIR)/Make/cygwin_plugin_def
diff --git a/src/osgPlugins/geo/ReaderWriterGEO.cpp b/src/osgPlugins/geo/ReaderWriterGEO.cpp
index ff3404ae9..47b17076c 100644
--- a/src/osgPlugins/geo/ReaderWriterGEO.cpp
+++ b/src/osgPlugins/geo/ReaderWriterGEO.cpp
@@ -7,6 +7,8 @@
 // 2- animation (see geoActions.cpp).
 // ver 1.1 GWM Dec 2002
 
+#include <string>
+
 #include <osg/Image>
 #include <osg/Group>
 #include <osg/LOD>
@@ -702,7 +704,8 @@ class ReaderWriterGEO : public ReaderWriter
         osg::MatrixTransform *makeText(georecord *gr) { // make transform, geode & text
             osg::MatrixTransform *numt=NULL;
             std::string    ttfPath("fonts/times.ttf");
-            int    gFontSize1=2;
+			// unused
+            //int    gFontSize1=2;
             osgText::Text *text= new  osgText::Text;
             text->setFont(ttfPath);
             const geoField *gfd=gr->getField(GEO_DB_TEXT_NAME);
@@ -1927,7 +1930,8 @@ void internalVars::update(const osg::FrameStamp *_frameStamp) {
 
 void geoField::parseExt(std::ifstream &fin) const { // Feb 2003 parse onme extension fields
 	static int nread=0; // debug only
-	geoExtensionDefRec *geoExt=(geoExtensionDefRec *)storage;
+	// unused
+	//geoExtensionDefRec *geoExt=(geoExtensionDefRec *)storage;
 	for (uint i=0; i<numItems; i++) {
 		geoExtensionDefRec rec;
 			fin.read((char *)&rec,sizeof(rec));
diff --git a/src/osgPlugins/geo/geoActions.cpp b/src/osgPlugins/geo/geoActions.cpp
index 1d584497e..7d83c1ee7 100644
--- a/src/osgPlugins/geo/geoActions.cpp
+++ b/src/osgPlugins/geo/geoActions.cpp
@@ -3,6 +3,8 @@
 // 2002
 // actions & behaviours for Geo loader in OSG
 
+#include <string>
+
 #include <stdio.h>
 #include <math.h>
 #include <osg/Image>
diff --git a/src/osgPlugins/geo/geoFormat.h b/src/osgPlugins/geo/geoFormat.h
index 9d74f2b12..4137b5be0 100644
--- a/src/osgPlugins/geo/geoFormat.h
+++ b/src/osgPlugins/geo/geoFormat.h
@@ -228,10 +228,12 @@ const unsigned char SIZEOF_BITFLAGS						= (SIZEOF_INT);
 
 
 
-const unsigned short MIN_CHAR_VAL						= -128;
+// Is this really meant to be unsigned????
+const unsigned short MIN_CHAR_VAL						= (unsigned short)(-128);
 const unsigned short MAX_CHAR_VAL			            = 127;
 const unsigned short MAX_UCHAR_VAL			            = 255;
-const unsigned short MIN_SHORT_VAL			            = -32768;
+// Is this really meant to be unsigned????
+const unsigned short MIN_SHORT_VAL			            = (unsigned short)(-32768);
 const unsigned short MAX_SHORT_VAL			            = 32767;
 const unsigned short MAX_USHORT_VAL			            = 65535;
 
diff --git a/src/osgPlugins/iv/parser.cpp b/src/osgPlugins/iv/parser.cpp
index 7cdee2198..dc029ed82 100644
--- a/src/osgPlugins/iv/parser.cpp
+++ b/src/osgPlugins/iv/parser.cpp
@@ -56,7 +56,12 @@
 #  pragma warning (disable:4541)
 #endif
 
+#ifdef __DARWIN_OSX__
+#include <sys/types.h>
+#include <sys/malloc.h>
+#else
 #include <malloc.h>
+#endif
 #include "mynode.h"
 #include <stdlib.h>
 #include "geometry.h"
diff --git a/src/osgPlugins/iv/parser.y b/src/osgPlugins/iv/parser.y
index 579c5a915..df1943f75 100644
--- a/src/osgPlugins/iv/parser.y
+++ b/src/osgPlugins/iv/parser.y
@@ -23,7 +23,11 @@
 #  pragma warning (disable:4541)
 #endif
 
+#ifdef __DARWIN_OSX__
+#include <sys/malloc.h>
+#else
 #include <malloc.h>
+#endif
 #include "mynode.h"
 #include <stdlib.h>
 #include "geometry.h"