From Corbin Holtz, addition of GDAL_INCLUDE and GDAL_LIB env vars for setting

a non standard location of GDAL

examples/osgdem/GNUmakefile

@@ -4,6 +4,14 @@ include $(TOPDIR)/Make/makedefs
 CXXFILES =\
 	osgdem.cpp\
 
+ifneq ("$(GDAL_INCLUDES)","")
+INC += $(GDAL_INCLUDES)
+endif
+
+ifneq ("$(GDAL_LIB_DIR)","")
+LDFLAGS += -L$(GDAL_LIB_DIR)
+endif
+
 LIBS     += -losgProducer -lProducer -losgTerrain -losgFX -losgGL2 -losgText -losgGA -losgDB -losgUtil -losg -lgdal $(GL_LIBS) $(X_LIBS) $(OTHER_LIBS) 
 
 INSTFILES = \

examples/osgdem/GNUmakefile.inst

@@ -4,6 +4,14 @@ include $(TOPDIR)/Make/makedefs
 CXXFILES =\
 	osgdem.cpp\
 
+ifneq ("$(GDAL_INCLUDES)","")
+INC += $(GDAL_INCLUDES)
+endif
+
+ifneq ("$(GDAL_LIB_DIR)","")
+LDFLAGS += -L$(GDAL_LIB_DIR)
+endif
+
 LIBS     += -losgProducer -lProducer -losgTerrain -losgFX -losgGL2 -losgDB -losgText -losgUtil -losg $(GL_LIBS) $(X_LIBS) $(OTHER_LIBS) 
 
 EXEC = osgdem

src/osgPlugins/gdal/GNUmakefile

@@ -4,6 +4,14 @@ include $(TOPDIR)/Make/makedefs
 CXXFILES =\
         ReaderWriterGDAL.cpp\
 
+ifneq ("$(GDAL_INCLUDES)","")
+INC += $(GDAL_INCLUDES)
+endif
+
+ifneq ("$(GDAL_LIB_DIR)","")
+LDFLAGS += -L$(GDAL_LIB_DIR)
+endif
+
 LIBS  += $(OSG_LIBS) -lgdal $(OTHER_LIBS)
 
 TARGET_BASENAME = gdal

src/osgTerrain/GNUmakefile

@@ -8,6 +8,13 @@ CXXFILES = \
     HeightFieldRenderer.cpp\
     Version.cpp\
 
+ifneq ("$(GDAL_INCLUDES)","")
+INC += $(GDAL_INCLUDES)
+endif
+
+ifneq ("$(GDAL_LIB_DIR)","")
+LDFLAGS += -L$(GDAL_LIB_DIR)
+endif
 
 DEF     += -DOSGTERRAIN_LIBRARY